Question: What is Connecting your local machine to a remote Kubernetes cluster?

Answer: A f t e r   i n s t a l l i n g   t e l e p r e s e n c e ,   r u n   t e l e p r e s e n c e   c o n n e c t   t o   l a u n c h   i t s   D a e m o n   a n d   c o n n e c t   y o u r   l o c a l   w o r k s t a t i o n   t o   t h e   c l u s t e r .   $   t e l e p r e s e n c e   c o n n e c t   L a u n c h i n g   T e l e p r e s e n c e   D a e m o n   . . .   C o n n e c t e d   t o   c o n t e x t   d e f a u l t   ( h t t p s : / / < c l u s t e r   p u b l i c   I P > )   Y o u   c a n   c u r l   s e r v i c e s   u s i n g   t h e   K u b e r n e t e s   s y n t a x   e . g .   c u r l   - i k   h t t p s : / / k u b e r n e t e s . d e f a u l t


Question: What is Developing or debugging an existing service?

Answer: W h e n   d e v e l o p i n g   a n   a p p l i c a t i o n   o n   K u b e r n e t e s ,   y o u   t y p i c a l l y   p r o g r a m   o r   d e b u g   a   s i n g l e   s e r v i c e .   T h e   s e r v i c e   m i g h t   r e q u i r e   a c c e s s   t o   o t h e r   s e r v i c e s   f o r   t e s t i n g   a n d   d e b u g g i n g .   O n e   o p t i o n   i s   t o   u s e   t h e   c o n t i n u o u s   d e p l o y m e n t   p i p e l i n e ,   b u t   e v e n   t h e   f a s t e s t   d e p l o y m e n t   p i p e l i n e   i n t r o d u c e s   a   d e l a y   i n   t h e   p r o g r a m   o r   d e b u g   c y c l e .   U s e   t h e   t e l e p r e s e n c e   i n t e r c e p t   $ S E R V I C E _ N A M E   - - p o r t   $ L O C A L _ P O R T : $ R E M O T E _ P O R T   c o m m a n d   t o   c r e a t e   a n   " i n t e r c e p t "   f o r   r e r o u t i n g   r e m o t e   s e r v i c e   t r a f f i c .   W h e r e :   $ S E R V I C E _ N A M E   i s   t h e   n a m e   o f   y o u r   l o c a l   s e r v i c e $ L O C A L _ P O R T   i s   t h e   p o r t   t h a t   y o u r   s e r v i c e   i s   r u n n i n g   o n   y o u r   l o c a l   w o r k s t a t i o n A n d   $ R E M O T E _ P O R T   i s   t h e   p o r t   y o u r   s e r v i c e   l i s t e n s   t o   i n   t h e   c l u s t e r   R u n n i n g   t h i s   c o m m a n d   t e l l s   T e l e p r e s e n c e   t o   s e n d   r e m o t e   t r a f f i c   t o   y o u r   l o c a l   s e r v i c e   i n s t e a d   o f   t h e   s e r v i c e   i n   t h e   r e m o t e   K u b e r n e t e s   c l u s t e r .   M a k e   e d i t s   t o   y o u r   s e r v i c e   s o u r c e   c o d e   l o c a l l y ,   s a v e ,   a n d   s e e   t h e   c o r r e s p o n d i n g   c h a n g e s   w h e n   a c c e s s i n g   y o u r   r e m o t e   a p p l i c a t i o n   t a k e   e f f e c t   i m m e d i a t e l y .   Y o u   c a n   a l s o   r u n   y o u r   l o c a l   s e r v i c e   u


Question: What is How does Telepresence work??

Answer: T e l e p r e s e n c e   i n s t a l l s   a   t r a f f i c - a g e n t   s i d e c a r   n e x t   t o   y o u r   e x i s t i n g   a p p l i c a t i o n ' s   c o n t a i n e r   r u n n i n g   i n   t h e   r e m o t e   c l u s t e r .   I t   t h e n   c a p t u r e s   a l l   t r a f f i c   r e q u e s t s   g o i n g   i n t o   t h e   P o d ,   a n d   i n s t e a d   o f   f o r w a r d i n g   t h i s   t o   t h e   a p p l i c a t i o n   i n   t h e   r e m o t e   c l u s t e r ,   i t   r o u t e s   a l l   t r a f f i c   ( w h e n   y o u   c r e a t e   a   g l o b a l   i n t e r c e p t   o r   a   s u b s e t   o f   t h e   t r a f f i c   ( w h e n   y o u   c r e a t e   a   p e r s o n a l   i n t e r c e p t )   t o   y o u r   l o c a l   d e v e l o p m e n t   e n v i r o n m e n t .


Question: What is What's next?

Answer: I f   y o u ' r e   i n t e r e s t e d   i n   a   h a n d s - o n   t u t o r i a l ,   c h e c k   o u t   t h i s   t u t o r i a l   t h a t   w a l k s   t h r o u g h   l o c a l l y   d e v e l o p i n g   t h e   G u e s t b o o k   a p p l i c a t i o n   o n   G o o g l e   K u b e r n e t e s   E n g i n e .   F o r   f u r t h e r   r e a d i n g ,   v i s i t   t h e   T e l e p r e s e n c e   w e b s i t e .   I t e m s   o n   t h i s   p a g e   r e f e r   t o   t h i r d   p a r t y   p r o d u c t s   o r   p r o j e c t s   t h a t   p r o v i d e   f u n c t i o n a l i t y   r e q u i r e d   b y   K u b e r n e t e s .   T h e   K u b e r n e t e s   p r o j e c t   a u t h o r s   a r e n ' t   r e s p o n s i b l e   f o r   t h o s e   t h i r d - p a r t y   p r o d u c t s   o r   p r o j e c t s .   S e e   t h e   C N C F   w e b s i t e   g u i d e l i n e s   f o r   m o r e   d e t a i l s .   Y o u   s h o u l d   r e a d   t h e   c o n t e n t   g u i d e   b e f o r e   p r o p o s i n g   a   c h a n g e   t h a t   a d d s   a n   e x t r a   t h i r d - p a r t y   l i n k .


Question: What is ObjectMeta?

Answer: ObjectMetaObjectMeta is metadata that all persisted resources must have, which includes all objects users must create.import "k8s.io/apimachinery/pkg/apis/meta/v1"ObjectMeta is metadata that all persisted resources must have, which includes all objects users must create.name (string)Name must be unique within a namespace. Is required when creating resources, although some resources may allow a client to request the generation of an appropriate name automatically. Name is primarily intended for creation idempotence and configuration definition. Cannot be updated. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names#namesgenerateName (string)GenerateName is an optional prefix, used by the server, to generate a unique name ONLY IF the Name field has not been provided. If this field is used, the name returned to the client will be different than the name passed. This value will also be combined with a unique suffix. The provided value has the same validation rules as the Name field, and may be truncated by the length of the suffix required to make the value unique on the server.If this field is specified and the generated name exists, the server will return a 409.Applied only if Name is not specified. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#idempotencynamespace (string)Namespace defines the space within which each name must be unique. An empty namespace is equivalent to the "default" namespace, but "default" is the canonical representation. Not all objects are required to be scoped to a namespace - the value of this field for those objects will be empty.Must be a DNS_LABEL. Cannot be updated. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaceslabels (map[string]string)Map of string keys and values that can be used to organize and categorize (scope and select) objects. May match selectors of replication controllers and services. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labelsannotations (map[string]string)Annotations is an unstructured key value map stored with a resource that may be set by external tools to store and retrieve arbitrary metadata. They are not queryable and should be preserved when modifying objects. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/annotationsSystemfinalizers ([]string)Set: unique values will be kept during a mergeMust be empty before the object is deleted from the registry. Each entry is an identifier for the responsible component that will remove the entry from the list. If the deletionTimestamp of the object is non-nil, entries in this list can only be removed. Finalizers may be processed and removed in any order. Order is NOT enforced because it introduces significant risk of stuck finalizers. finalizers is a shared field, any actor with permission can reorder it. If the finalizer list is processed in order, then this can lead to a s


Question: How does ObjectMeta work?

Answer: ObjectMetaObjectMeta is metadata that all persisted resources must have, which includes all objects users must create.import "k8s.io/apimachinery/pkg/apis/meta/v1"ObjectMeta is metadata that all persisted resources must have, which includes all objects users must create.name (string)Name must be unique within a namespace. Is required when creating resources, although some resources may allow a client to request the generation of an appropriate name automatically. Name is primarily intended for creation idempotence and configuration definition. Cannot be updated. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names#namesgenerateName (string)GenerateName is an optional prefix, used by the server, to generate a unique name ONLY IF the Name field has not been provided. If this field is used, the name returned to the client will be different than the name passed. This value will also be combined with a unique suffix. The provided value has the same validation rules as the Name field, and may be truncated by the length of the suffix required to make the value unique on the server.If this field is specified and the generated name exists, the server will return a 409.Applied only if Name is not specified. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#idempotencynamespace (string)Namespace defines the space within which each name must be unique. An empty namespace is equivalent to the "default" namespace, but "default" is the canonical representation. Not all objects are required to be scoped to a namespace - the value of this field for those objects will be empty.Must be a DNS_LABEL. Cannot be updated. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaceslabels (map[string]string)Map of string keys and values that can be used to organize and categorize (scope and select) objects. May match selectors of replication controllers and services. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labelsannotations (map[string]string)Annotations is an unstructured key value map stored with a resource that may be set by external tools to store and retrieve arbitrary metadata. They are not queryable and should be preserved when modifying objects. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/annotationsSystemfinalizers ([]string)Set: unique values will be kept during a mergeMust be empty before the object is deleted from the registry. Each entry is an identifier for the responsible component that will remove the entry from the list. If the deletionTimestamp of the object is non-nil, entries in this list can only be removed. Finalizers may be processed and removed in any order. Order is NOT enforced because it introduces significant risk of stuck finalizers. finalizers is a shared field, any actor with permission can reorder it. If the finalizer list is processed in order, then this can lead to a s


Question: When would you use ObjectMeta?

Answer: ObjectMetaObjectMeta is metadata that all persisted resources must have, which includes all objects users must create.import "k8s.io/apimachinery/pkg/apis/meta/v1"ObjectMeta is metadata that all persisted resources must have, which includes all objects users must create.name (string)Name must be unique within a namespace. Is required when creating resources, although some resources may allow a client to request the generation of an appropriate name automatically. Name is primarily intended for creation idempotence and configuration definition. Cannot be updated. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names#namesgenerateName (string)GenerateName is an optional prefix, used by the server, to generate a unique name ONLY IF the Name field has not been provided. If this field is used, the name returned to the client will be different than the name passed. This value will also be combined with a unique suffix. The provided value has the same validation rules as the Name field, and may be truncated by the length of the suffix required to make the value unique on the server.If this field is specified and the generated name exists, the server will return a 409.Applied only if Name is not specified. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#idempotencynamespace (string)Namespace defines the space within which each name must be unique. An empty namespace is equivalent to the "default" namespace, but "default" is the canonical representation. Not all objects are required to be scoped to a namespace - the value of this field for those objects will be empty.Must be a DNS_LABEL. Cannot be updated. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaceslabels (map[string]string)Map of string keys and values that can be used to organize and categorize (scope and select) objects. May match selectors of replication controllers and services. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labelsannotations (map[string]string)Annotations is an unstructured key value map stored with a resource that may be set by external tools to store and retrieve arbitrary metadata. They are not queryable and should be preserved when modifying objects. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/annotationsSystemfinalizers ([]string)Set: unique values will be kept during a mergeMust be empty before the object is deleted from the registry. Each entry is an identifier for the responsible component that will remove the entry from the list. If the deletionTimestamp of the object is non-nil, entries in this list can only be removed. Finalizers may be processed and removed in any order. Order is NOT enforced because it introduces significant risk of stuck finalizers. finalizers is a shared field, any actor with permission can reorder it. If the finalizer list is processed in order, then this can lead to a s


Question: What are the benefits of ObjectMeta?

Answer: ObjectMetaObjectMeta is metadata that all persisted resources must have, which includes all objects users must create.import "k8s.io/apimachinery/pkg/apis/meta/v1"ObjectMeta is metadata that all persisted resources must have, which includes all objects users must create.name (string)Name must be unique within a namespace. Is required when creating resources, although some resources may allow a client to request the generation of an appropriate name automatically. Name is primarily intended for creation idempotence and configuration definition. Cannot be updated. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names#namesgenerateName (string)GenerateName is an optional prefix, used by the server, to generate a unique name ONLY IF the Name field has not been provided. If this field is used, the name returned to the client will be different than the name passed. This value will also be combined with a unique suffix. The provided value has the same validation rules as the Name field, and may be truncated by the length of the suffix required to make the value unique on the server.If this field is specified and the generated name exists, the server will return a 409.Applied only if Name is not specified. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#idempotencynamespace (string)Namespace defines the space within which each name must be unique. An empty namespace is equivalent to the "default" namespace, but "default" is the canonical representation. Not all objects are required to be scoped to a namespace - the value of this field for those objects will be empty.Must be a DNS_LABEL. Cannot be updated. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaceslabels (map[string]string)Map of string keys and values that can be used to organize and categorize (scope and select) objects. May match selectors of replication controllers and services. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labelsannotations (map[string]string)Annotations is an unstructured key value map stored with a resource that may be set by external tools to store and retrieve arbitrary metadata. They are not queryable and should be preserved when modifying objects. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/annotationsSystemfinalizers ([]string)Set: unique values will be kept during a mergeMust be empty before the object is deleted from the registry. Each entry is an identifier for the responsible component that will remove the entry from the list. If the deletionTimestamp of the object is non-nil, entries in this list can only be removed. Finalizers may be processed and removed in any order. Order is NOT enforced because it introduces significant risk of stuck finalizers. finalizers is a shared field, any actor with permission can reorder it. If the finalizer list is processed in order, then this can lead to a s


Question: What is ObjectMeta?

Answer: i m p o r t   " k 8 s . i o / a p i m a c h i n e r y / p k g / a p i s / m e t a / v 1 "   O b j e c t M e t a   i s   m e t a d a t a   t h a t   a l l   p e r s i s t e d   r e s o u r c e s   m u s t   h a v e ,   w h i c h   i n c l u d e s   a l l   o b j e c t s   u s e r s   m u s t   c r e a t e .   n a m e   ( s t r i n g ) N a m e   m u s t   b e   u n i q u e   w i t h i n   a   n a m e s p a c e .   I s   r e q u i r e d   w h e n   c r e a t i n g   r e s o u r c e s ,   a l t h o u g h   s o m e   r e s o u r c e s   m a y   a l l o w   a   c l i e n t   t o   r e q u e s t   t h e   g e n e r a t i o n   o f   a n   a p p r o p r i a t e   n a m e   a u t o m a t i c a l l y .   N a m e   i s   p r i m a r i l y   i n t e n d e d   f o r   c r e a t i o n   i d e m p o t e n c e   a n d   c o n f i g u r a t i o n   d e f i n i t i o n .   C a n n o t   b e   u p d a t e d .   M o r e   i n f o :   h t t p s : / / k u b e r n e t e s . i o / d o c s / c o n c e p t s / o v e r v i e w / w o r k i n g - w i t h - o b j e c t s / n a m e s # n a m e s g e n e r a t e N a m e   ( s t r i n g ) G e n e r a t e N a m e   i s   a n   o p t i o n a l   p r e f i x ,   u s e d   b y   t h e   s e r v e r ,   t o   g e n e r a t e   a   u n i q u e   n a m e   O N L Y   I F   t h e   N a m e   f i e l d   h a s   n o t   b e e n   p r o v i d e d .   I f   t h i s   f i e l d   i s   u s e d ,   t h e   n a m e   r e t u r n e d   t o   t h e   c l i e n t   w i l l   b e   d i f f e r e n t   t h a n   t h e   n a m e   p a s s e d .   T h i s   v a l u e   w i l l   a l s o   b e   c o m b i n e d   w i t h   a   u n i q u e   s u f f i x .   T h e   p r o v i d e d   v a l u e   h a s   t h e   s a m e   v a l i d a t i o n   r u l e s   a s   t h e   N a m e   f i e l d ,   a n d   m a y   b e   t r u n c a t e d   b y   t h e   l e n g t h   o f   t h e   s u f f i x   r e q u i r e d   t o   m a k e   t h e   v a l u e   u n i q u e   o n   t h e   s e


Question: What is System?

Answer: f i n a l i z e r s   ( [ ] s t r i n g ) S e t :   u n i q u e   v a l u e s   w i l l   b e   k e p t   d u r i n g   a   m e r g e M u s t   b e   e m p t y   b e f o r e   t h e   o b j e c t   i s   d e l e t e d   f r o m   t h e   r e g i s t r y .   E a c h   e n t r y   i s   a n   i d e n t i f i e r   f o r   t h e   r e s p o n s i b l e   c o m p o n e n t   t h a t   w i l l   r e m o v e   t h e   e n t r y   f r o m   t h e   l i s t .   I f   t h e   d e l e t i o n T i m e s t a m p   o f   t h e   o b j e c t   i s   n o n - n i l ,   e n t r i e s   i n   t h i s   l i s t   c a n   o n l y   b e   r e m o v e d .   F i n a l i z e r s   m a y   b e   p r o c e s s e d   a n d   r e m o v e d   i n   a n y   o r d e r .   O r d e r   i s   N O T   e n f o r c e d   b e c a u s e   i t   i n t r o d u c e s   s i g n i f i c a n t   r i s k   o f   s t u c k   f i n a l i z e r s .   f i n a l i z e r s   i s   a   s h a r e d   f i e l d ,   a n y   a c t o r   w i t h   p e r m i s s i o n   c a n   r e o r d e r   i t .   I f   t h e   f i n a l i z e r   l i s t   i s   p r o c e s s e d   i n   o r d e r ,   t h e n   t h i s   c a n   l e a d   t o   a   s i t u a t i o n   i n   w h i c h   t h e   c o m p o n e n t   r e s p o n s i b l e   f o r   t h e   f i r s t   f i n a l i z e r   i n   t h e   l i s t   i s   w a i t i n g   f o r   a   s i g n a l   ( f i e l d   v a l u e ,   e x t e r n a l   s y s t e m ,   o r   o t h e r )   p r o d u c e d   b y   a   c o m p o n e n t   r e s p o n s i b l e   f o r   a   f i n a l i z e r   l a t e r   i n   t h e   l i s t ,   r e s u l t i n g   i n   a   d e a d l o c k .   W i t h o u t   e n f o r c e d   o r d e r i n g   f i n a l i z e r s   a r e   f r e e   t o   o r d e r   a m o n g s t   t h e m s e l v e s   a n d   a r e   n o t   v u l n e r a b l e   t o   o r d e r i n g   c h a n g e s   i n   t h e   l i s t . m a n a g e d F i e l d s   ( [ ] M a n a g e d F i e l d s


Question: What is Read-only?

Answer: c r e a t i o n T i m e s t a m p   ( T i m e ) C r e a t i o n T i m e s t a m p   i s   a   t i m e s t a m p   r e p r e s e n t i n g   t h e   s e r v e r   t i m e   w h e n   t h i s   o b j e c t   w a s   c r e a t e d .   I t   i s   n o t   g u a r a n t e e d   t o   b e   s e t   i n   h a p p e n s - b e f o r e   o r d e r   a c r o s s   s e p a r a t e   o p e r a t i o n s .   C l i e n t s   m a y   n o t   s e t   t h i s   v a l u e .   I t   i s   r e p r e s e n t e d   i n   R F C 3 3 3 9   f o r m   a n d   i s   i n   U T C . P o p u l a t e d   b y   t h e   s y s t e m .   R e a d - o n l y .   N u l l   f o r   l i s t s .   M o r e   i n f o :   h t t p s : / / g i t . k 8 s . i o / c o m m u n i t y / c o n t r i b u t o r s / d e v e l / s i g - a r c h i t e c t u r e / a p i - c o n v e n t i o n s . m d # m e t a d a t a T i m e   i s   a   w r a p p e r   a r o u n d   t i m e . T i m e   w h i c h   s u p p o r t s   c o r r e c t   m a r s h a l i n g   t o   Y A M L   a n d   J S O N .   W r a p p e r s   a r e   p r o v i d e d   f o r   m a n y   o f   t h e   f a c t o r y   m e t h o d s   t h a t   t h e   t i m e   p a c k a g e   o f f e r s . d e l e t i o n G r a c e P e r i o d S e c o n d s   ( i n t 6 4 ) N u m b e r   o f   s e c o n d s   a l l o w e d   f o r   t h i s   o b j e c t   t o   g r a c e f u l l y   t e r m i n a t e   b e f o r e   i t   w i l l   b e   r e m o v e d   f r o m   t h e   s y s t e m .   O n l y   s e t   w h e n   d e l e t i o n T i m e s t a m p   i s   a l s o   s e t .   M a y   o n l y   b e   s h o r t e n e d .   R e a d - o n l y . d e l e t i o n T i m e s t a m p   ( T i m e ) D e l e t i o n T i m e s t a m p   i s   R F C   3 3 3 9   d a t e   a n d   t i m e   a t   w h i c h   t h i s   r e s o u r c e   w i l l   b e   d e l e t e d .   T h i s   f i e l d   i s   s e t   b y   t h e   s e r v e r   w h e n   a   g r a c e f u l   d e l e t i o n   i s   r e q u e s t


Question: What is kubeadm upgrade phases?

Answer: kubeadm upgrade phaseskubeadm upgrade apply phaseUsing the phases of kubeadm upgrade apply, you can choose to execute the separate steps of the initial upgrade of a control plane node.SynopsisUse this command to invoke single phase of the "apply" workflowkubeadm upgrade apply phase [flags] Options-h, --helphelp for phaseOptions inherited from parent commands--rootfs stringThe path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path.SynopsisRun preflight checks before upgradekubeadm upgrade apply phase preflight [flags] Options--allow-experimental-upgradesShow unstable versions of Kubernetes as an upgrade alternative and allow upgrading to an alpha/beta/release candidate versions of Kubernetes.--allow-release-candidate-upgradesShow release candidate versions of Kubernetes as an upgrade alternative and allow upgrading to a release candidate versions of Kubernetes.--config stringPath to a kubeadm configuration file.--dry-runDo not change any state, just output what actions would be performed.-f, --forceForce upgrading although some requirements might not be met. This also implies non-interactive mode.-h, --helphelp for preflight--ignore-preflight-errors stringsA list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.--kubeconfig string Default: "/etc/kubernetes/admin.conf"The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.-y, --yesPerform the upgrade and do not prompt for confirmation (non-interactive mode).Options inherited from parent commands--rootfs stringThe path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path.SynopsisUpgrade the control planekubeadm upgrade apply phase control-plane [flags] Options--certificate-renewal Default: truePerform the renewal of certificates used by component changed during upgrades.--config stringPath to a kubeadm configuration file.--dry-runDo not change any state, just output what actions would be performed.--etcd-upgrade Default: truePerform the upgrade of etcd.-h, --helphelp for control-plane--kubeconfig string Default: "/etc/kubernetes/admin.conf"The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.--patches stringPath to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration", "corednsdeployment". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determin


Question: How does kubeadm upgrade phases work?

Answer: kubeadm upgrade phaseskubeadm upgrade apply phaseUsing the phases of kubeadm upgrade apply, you can choose to execute the separate steps of the initial upgrade of a control plane node.SynopsisUse this command to invoke single phase of the "apply" workflowkubeadm upgrade apply phase [flags] Options-h, --helphelp for phaseOptions inherited from parent commands--rootfs stringThe path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path.SynopsisRun preflight checks before upgradekubeadm upgrade apply phase preflight [flags] Options--allow-experimental-upgradesShow unstable versions of Kubernetes as an upgrade alternative and allow upgrading to an alpha/beta/release candidate versions of Kubernetes.--allow-release-candidate-upgradesShow release candidate versions of Kubernetes as an upgrade alternative and allow upgrading to a release candidate versions of Kubernetes.--config stringPath to a kubeadm configuration file.--dry-runDo not change any state, just output what actions would be performed.-f, --forceForce upgrading although some requirements might not be met. This also implies non-interactive mode.-h, --helphelp for preflight--ignore-preflight-errors stringsA list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.--kubeconfig string Default: "/etc/kubernetes/admin.conf"The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.-y, --yesPerform the upgrade and do not prompt for confirmation (non-interactive mode).Options inherited from parent commands--rootfs stringThe path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path.SynopsisUpgrade the control planekubeadm upgrade apply phase control-plane [flags] Options--certificate-renewal Default: truePerform the renewal of certificates used by component changed during upgrades.--config stringPath to a kubeadm configuration file.--dry-runDo not change any state, just output what actions would be performed.--etcd-upgrade Default: truePerform the upgrade of etcd.-h, --helphelp for control-plane--kubeconfig string Default: "/etc/kubernetes/admin.conf"The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.--patches stringPath to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration", "corednsdeployment". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determin


Question: When would you use kubeadm upgrade phases?

Answer: kubeadm upgrade phaseskubeadm upgrade apply phaseUsing the phases of kubeadm upgrade apply, you can choose to execute the separate steps of the initial upgrade of a control plane node.SynopsisUse this command to invoke single phase of the "apply" workflowkubeadm upgrade apply phase [flags] Options-h, --helphelp for phaseOptions inherited from parent commands--rootfs stringThe path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path.SynopsisRun preflight checks before upgradekubeadm upgrade apply phase preflight [flags] Options--allow-experimental-upgradesShow unstable versions of Kubernetes as an upgrade alternative and allow upgrading to an alpha/beta/release candidate versions of Kubernetes.--allow-release-candidate-upgradesShow release candidate versions of Kubernetes as an upgrade alternative and allow upgrading to a release candidate versions of Kubernetes.--config stringPath to a kubeadm configuration file.--dry-runDo not change any state, just output what actions would be performed.-f, --forceForce upgrading although some requirements might not be met. This also implies non-interactive mode.-h, --helphelp for preflight--ignore-preflight-errors stringsA list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.--kubeconfig string Default: "/etc/kubernetes/admin.conf"The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.-y, --yesPerform the upgrade and do not prompt for confirmation (non-interactive mode).Options inherited from parent commands--rootfs stringThe path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path.SynopsisUpgrade the control planekubeadm upgrade apply phase control-plane [flags] Options--certificate-renewal Default: truePerform the renewal of certificates used by component changed during upgrades.--config stringPath to a kubeadm configuration file.--dry-runDo not change any state, just output what actions would be performed.--etcd-upgrade Default: truePerform the upgrade of etcd.-h, --helphelp for control-plane--kubeconfig string Default: "/etc/kubernetes/admin.conf"The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.--patches stringPath to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration", "corednsdeployment". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determin


Question: What are the benefits of kubeadm upgrade phases?

Answer: kubeadm upgrade phaseskubeadm upgrade apply phaseUsing the phases of kubeadm upgrade apply, you can choose to execute the separate steps of the initial upgrade of a control plane node.SynopsisUse this command to invoke single phase of the "apply" workflowkubeadm upgrade apply phase [flags] Options-h, --helphelp for phaseOptions inherited from parent commands--rootfs stringThe path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path.SynopsisRun preflight checks before upgradekubeadm upgrade apply phase preflight [flags] Options--allow-experimental-upgradesShow unstable versions of Kubernetes as an upgrade alternative and allow upgrading to an alpha/beta/release candidate versions of Kubernetes.--allow-release-candidate-upgradesShow release candidate versions of Kubernetes as an upgrade alternative and allow upgrading to a release candidate versions of Kubernetes.--config stringPath to a kubeadm configuration file.--dry-runDo not change any state, just output what actions would be performed.-f, --forceForce upgrading although some requirements might not be met. This also implies non-interactive mode.-h, --helphelp for preflight--ignore-preflight-errors stringsA list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.--kubeconfig string Default: "/etc/kubernetes/admin.conf"The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.-y, --yesPerform the upgrade and do not prompt for confirmation (non-interactive mode).Options inherited from parent commands--rootfs stringThe path to the 'real' host root filesystem. This will cause kubeadm to chroot into the provided path.SynopsisUpgrade the control planekubeadm upgrade apply phase control-plane [flags] Options--certificate-renewal Default: truePerform the renewal of certificates used by component changed during upgrades.--config stringPath to a kubeadm configuration file.--dry-runDo not change any state, just output what actions would be performed.--etcd-upgrade Default: truePerform the upgrade of etcd.-h, --helphelp for control-plane--kubeconfig string Default: "/etc/kubernetes/admin.conf"The kubeconfig file to use when talking to the cluster. If the flag is not set, a set of standard locations can be searched for an existing kubeconfig file.--patches stringPath to a directory that contains files named "target[suffix][+patchtype].extension". For example, "kube-apiserver0+merge.yaml" or just "etcd.json". "target" can be one of "kube-apiserver", "kube-controller-manager", "kube-scheduler", "etcd", "kubeletconfiguration", "corednsdeployment". "patchtype" can be one of "strategic", "merge" or "json" and they match the patch formats supported by kubectl. The default "patchtype" is "strategic". "extension" must be either "json" or "yaml". "suffix" is an optional string that can be used to determin


Question: What is kubeadm upgrade apply phase?

Answer: U s i n g   t h e   p h a s e s   o f   k u b e a d m   u p g r a d e   a p p l y ,   y o u   c a n   c h o o s e   t o   e x e c u t e   t h e   s e p a r a t e   s t e p s   o f   t h e   i n i t i a l   u p g r a d e   o f   a   c o n t r o l   p l a n e   n o d e .   S y n o p s i s U s e   t h i s   c o m m a n d   t o   i n v o k e   s i n g l e   p h a s e   o f   t h e   " a p p l y "   w o r k f l o w k u b e a d m   u p g r a d e   a p p l y   p h a s e   [ f l a g s ]   O p t i o n s - h ,   - - h e l p h e l p   f o r   p h a s e O p t i o n s   i n h e r i t e d   f r o m   p a r e n t   c o m m a n d s - - r o o t f s   s t r i n g T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .


Question: What is Synopsis?

Answer: U s e   t h i s   c o m m a n d   t o   i n v o k e   s i n g l e   p h a s e   o f   t h e   " a p p l y "   w o r k f l o w   k u b e a d m   u p g r a d e   a p p l y   p h a s e   [ f l a g s ]


Question: What is Options?

Answer: h e l p   f o r   p h a s e


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s R u n   p r e f l i g h t   c h e c k s   b e f o r e   u p g r a d e k u b e a d m   u p g r a d e   a p p l y   p h a s e   p r e f l i g h t   [ f l a g s ]   O p t i o n s - - a l l o w - e x p e r i m e n t a l - u p g r a d e s S h o w   u n s t a b l e   v e r s i o n s   o f   K u b e r n e t e s   a s   a n   u p g r a d e   a l t e r n a t i v e   a n d   a l l o w   u p g r a d i n g   t o   a n   a l p h a / b e t a / r e l e a s e   c a n d i d a t e   v e r s i o n s   o f   K u b e r n e t e s . - - a l l o w - r e l e a s e - c a n d i d a t e - u p g r a d e s S h o w   r e l e a s e   c a n d i d a t e   v e r s i o n s   o f   K u b e r n e t e s   a s   a n   u p g r a d e   a l t e r n a t i v e   a n d   a l l o w   u p g r a d i n g   t o   a   r e l e a s e   c a n d i d a t e   v e r s i o n s   o f   K u b e r n e t e s . - - c o n f i g   s t r i n g P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e . - - d r y - r u n D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   w h a t   a c t i o n s   w o u l d   b e   p e r f o r m e d . - f ,   - - f o r c e F o r c e   u p g r a d i n g   a l t h o u g h   s o m e   r e q u i r e m e n t s   m i g h t   n o t   b e   m e t .   T h i s   a l s o   i m p l i e s   n o n - i n t e r a c t i v e   m o d e . - h ,   - - h e l p h e l p   f o r   p r e f l i g h t - - i g n o r e - p r e f l i g h t - e r r o r s   s t r i n g s A   l i s t   o f   c h e c k s   w h o s e   e r r o r s   w i l l   b e   s h o w n   a s   w a r n i n g s .   E x a m p l e :   ' I s P r i v i l e g e d U s e r , S w a p ' .   V a l u e   ' a l l '   i g n o r e s   e r r o r s   f r o m   a l l   c h e c k s . - - k u b e c o n f i g   s t r i n g   D e f


Question: What is Synopsis?

Answer: R u n   p r e f l i g h t   c h e c k s   b e f o r e   u p g r a d e   k u b e a d m   u p g r a d e   a p p l y   p h a s e   p r e f l i g h t   [ f l a g s ]


Question: What is Options?

Answer: S h o w   u n s t a b l e   v e r s i o n s   o f   K u b e r n e t e s   a s   a n   u p g r a d e   a l t e r n a t i v e   a n d   a l l o w   u p g r a d i n g   t o   a n   a l p h a / b e t a / r e l e a s e   c a n d i d a t e   v e r s i o n s   o f   K u b e r n e t e s .   S h o w   r e l e a s e   c a n d i d a t e   v e r s i o n s   o f   K u b e r n e t e s   a s   a n   u p g r a d e   a l t e r n a t i v e   a n d   a l l o w   u p g r a d i n g   t o   a   r e l e a s e   c a n d i d a t e   v e r s i o n s   o f   K u b e r n e t e s .   P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e .   D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   w h a t   a c t i o n s   w o u l d   b e   p e r f o r m e d .   F o r c e   u p g r a d i n g   a l t h o u g h   s o m e   r e q u i r e m e n t s   m i g h t   n o t   b e   m e t .   T h i s   a l s o   i m p l i e s   n o n - i n t e r a c t i v e   m o d e .   h e l p   f o r   p r e f l i g h t   A   l i s t   o f   c h e c k s   w h o s e   e r r o r s   w i l l   b e   s h o w n   a s   w a r n i n g s .   E x a m p l e :   ' I s P r i v i l e g e d U s e r , S w a p ' .   V a l u e   ' a l l '   i g n o r e s   e r r o r s   f r o m   a l l   c h e c k s .   T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e .   P e r f o r m   t h e   u p g r a d e   a n d   d o   n o t   p r o m p t   f o r   c o n f i r m a t i o n   ( n o n - i n t e r a c t i v e   m o d e ) .


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s U p g r a d e   t h e   c o n t r o l   p l a n e k u b e a d m   u p g r a d e   a p p l y   p h a s e   c o n t r o l - p l a n e   [ f l a g s ]   O p t i o n s - - c e r t i f i c a t e - r e n e w a l   D e f a u l t :   t r u e P e r f o r m   t h e   r e n e w a l   o f   c e r t i f i c a t e s   u s e d   b y   c o m p o n e n t   c h a n g e d   d u r i n g   u p g r a d e s . - - c o n f i g   s t r i n g P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e . - - d r y - r u n D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   w h a t   a c t i o n s   w o u l d   b e   p e r f o r m e d . - - e t c d - u p g r a d e   D e f a u l t :   t r u e P e r f o r m   t h e   u p g r a d e   o f   e t c d . - h ,   - - h e l p h e l p   f o r   c o n t r o l - p l a n e - - k u b e c o n f i g   s t r i n g   D e f a u l t :   " / e t c / k u b e r n e t e s / a d m i n . c o n f " T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e . - - p a t c h e s   s t r i n g P a t h   t o   a   d i r e c t o r y   t h a t   c o n t a i n s   f i l e s   n a m e d   " t a r g e t [ s u f f i x ] [ + p a t c h t y p e ] . e x t e n s i o n " .   F o r   e x a m p l e ,   " k u b e - a p i s e r v e r 0 + m e r g e . y a m l "   o r   j u s t   " e t c d . j s o n " .   " t a r g e t "   c a n   b e   o n e   o f   " k u b e - a p i s e r v e r " ,   " k u b e - c o n t r o l l e r - m a n a g e r " ,   " k u b e - s c h e d u l e r " ,   " e t c d " ,   " k u b


Question: What is Synopsis?

Answer: U p g r a d e   t h e   c o n t r o l   p l a n e   k u b e a d m   u p g r a d e   a p p l y   p h a s e   c o n t r o l - p l a n e   [ f l a g s ]


Question: What is Options?

Answer: P e r f o r m   t h e   r e n e w a l   o f   c e r t i f i c a t e s   u s e d   b y   c o m p o n e n t   c h a n g e d   d u r i n g   u p g r a d e s .   P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e .   D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   w h a t   a c t i o n s   w o u l d   b e   p e r f o r m e d .   P e r f o r m   t h e   u p g r a d e   o f   e t c d .   h e l p   f o r   c o n t r o l - p l a n e   T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e .   P a t h   t o   a   d i r e c t o r y   t h a t   c o n t a i n s   f i l e s   n a m e d   " t a r g e t [ s u f f i x ] [ + p a t c h t y p e ] . e x t e n s i o n " .   F o r   e x a m p l e ,   " k u b e - a p i s e r v e r 0 + m e r g e . y a m l "   o r   j u s t   " e t c d . j s o n " .   " t a r g e t "   c a n   b e   o n e   o f   " k u b e - a p i s e r v e r " ,   " k u b e - c o n t r o l l e r - m a n a g e r " ,   " k u b e - s c h e d u l e r " ,   " e t c d " ,   " k u b e l e t c o n f i g u r a t i o n " ,   " c o r e d n s d e p l o y m e n t " .   " p a t c h t y p e "   c a n   b e   o n e   o f   " s t r a t e g i c " ,   " m e r g e "   o r   " j s o n "   a n d   t h e y   m a t c h   t h e   p a t c h   f o r m a t s   s u p p o r t e d   b y   k u b e c t l .   T h e   d e f a u l t   " p a t c h t y p e "   i s   " s t r a t e g i c " .   " e x t e n s i o n "   m u s t   b e   e i t h e r   " j s o n "   o r   " y a m l " .   " s u f f i x "   i s   a n   o p t i o n a l   s t r i n g   t h a t   c a n   b e   u s e d   t o   d e t e r m i n e   w h i c h   p a t c h e s   a r e   a p p l i e d   f i r s t   a l p h a - n u m e r i c a l l y .


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s U p l o a d   t h e   k u b e a d m   a n d   k u b e l e t   c o n f i g u r a t i o n s   t o   C o n f i g M a p s k u b e a d m   u p g r a d e   a p p l y   p h a s e   u p l o a d - c o n f i g   [ f l a g s ]   O p t i o n s - h ,   - - h e l p h e l p   f o r   u p l o a d - c o n f i g O p t i o n s   i n h e r i t e d   f r o m   p a r e n t   c o m m a n d s - - r o o t f s   s t r i n g T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .


Question: What is Synopsis?

Answer: U p l o a d   t h e   k u b e a d m   a n d   k u b e l e t   c o n f i g u r a t i o n s   t o   C o n f i g M a p s   k u b e a d m   u p g r a d e   a p p l y   p h a s e   u p l o a d - c o n f i g   [ f l a g s ]


Question: What is Options?

Answer: h e l p   f o r   u p l o a d - c o n f i g


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s U p g r a d e   t h e   k u b e l e t   c o n f i g u r a t i o n   f o r   t h i s   n o d e   b y   d o w n l o a d i n g   i t   f r o m   t h e   k u b e l e t - c o n f i g   C o n f i g M a p   s t o r e d   i n   t h e   c l u s t e r k u b e a d m   u p g r a d e   a p p l y   p h a s e   k u b e l e t - c o n f i g   [ f l a g s ]   O p t i o n s - - c o n f i g   s t r i n g P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e . - - d r y - r u n D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   w h a t   a c t i o n s   w o u l d   b e   p e r f o r m e d . - h ,   - - h e l p h e l p   f o r   k u b e l e t - c o n f i g - - k u b e c o n f i g   s t r i n g   D e f a u l t :   " / e t c / k u b e r n e t e s / a d m i n . c o n f " T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e . - - p a t c h e s   s t r i n g P a t h   t o   a   d i r e c t o r y   t h a t   c o n t a i n s   f i l e s   n a m e d   " t a r g e t [ s u f f i x ] [ + p a t c h t y p e ] . e x t e n s i o n " .   F o r   e x a m p l e ,   " k u b e - a p i s e r v e r 0 + m e r g e . y a m l "   o r   j u s t   " e t c d . j s o n " .   " t a r g e t "   c a n   b e   o n e   o f   " k u b e - a p i s e r v e r " ,   " k u b e - c o n t r o l l e r - m a n a g e r " ,   " k u b e - s c h e d u l e r " ,   " e t c d " ,   " k u b e l e t c o n f i g u r a t i o n " ,   " c o r e d n s d e p l o y m e n t " .   " p a t c h t y p e "   c a n   b e   o n e   o f   " s t r


Question: What is Synopsis?

Answer: U p g r a d e   t h e   k u b e l e t   c o n f i g u r a t i o n   f o r   t h i s   n o d e   b y   d o w n l o a d i n g   i t   f r o m   t h e   k u b e l e t - c o n f i g   C o n f i g M a p   s t o r e d   i n   t h e   c l u s t e r   k u b e a d m   u p g r a d e   a p p l y   p h a s e   k u b e l e t - c o n f i g   [ f l a g s ]


Question: What is Options?

Answer: P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e .   D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   w h a t   a c t i o n s   w o u l d   b e   p e r f o r m e d .   h e l p   f o r   k u b e l e t - c o n f i g   T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e .   P a t h   t o   a   d i r e c t o r y   t h a t   c o n t a i n s   f i l e s   n a m e d   " t a r g e t [ s u f f i x ] [ + p a t c h t y p e ] . e x t e n s i o n " .   F o r   e x a m p l e ,   " k u b e - a p i s e r v e r 0 + m e r g e . y a m l "   o r   j u s t   " e t c d . j s o n " .   " t a r g e t "   c a n   b e   o n e   o f   " k u b e - a p i s e r v e r " ,   " k u b e - c o n t r o l l e r - m a n a g e r " ,   " k u b e - s c h e d u l e r " ,   " e t c d " ,   " k u b e l e t c o n f i g u r a t i o n " ,   " c o r e d n s d e p l o y m e n t " .   " p a t c h t y p e "   c a n   b e   o n e   o f   " s t r a t e g i c " ,   " m e r g e "   o r   " j s o n "   a n d   t h e y   m a t c h   t h e   p a t c h   f o r m a t s   s u p p o r t e d   b y   k u b e c t l .   T h e   d e f a u l t   " p a t c h t y p e "   i s   " s t r a t e g i c " .   " e x t e n s i o n "   m u s t   b e   e i t h e r   " j s o n "   o r   " y a m l " .   " s u f f i x "   i s   a n   o p t i o n a l   s t r i n g   t h a t   c a n   b e   u s e d   t o   d e t e r m i n e   w h i c h   p a t c h e s   a r e   a p p l i e d   f i r s t   a l p h a - n u m e r i c a l l y .


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s C o n f i g u r e s   b o o t s t r a p   t o k e n   a n d   c l u s t e r - i n f o   R B A C   r u l e s k u b e a d m   u p g r a d e   a p p l y   p h a s e   b o o t s t r a p - t o k e n   [ f l a g s ]   O p t i o n s - - c o n f i g   s t r i n g P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e . - - d r y - r u n D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   w h a t   a c t i o n s   w o u l d   b e   p e r f o r m e d . - h ,   - - h e l p h e l p   f o r   b o o t s t r a p - t o k e n - - k u b e c o n f i g   s t r i n g   D e f a u l t :   " / e t c / k u b e r n e t e s / a d m i n . c o n f " T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e . O p t i o n s   i n h e r i t e d   f r o m   p a r e n t   c o m m a n d s - - r o o t f s   s t r i n g T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .


Question: What is Synopsis?

Answer: C o n f i g u r e s   b o o t s t r a p   t o k e n   a n d   c l u s t e r - i n f o   R B A C   r u l e s   k u b e a d m   u p g r a d e   a p p l y   p h a s e   b o o t s t r a p - t o k e n   [ f l a g s ]


Question: What is Options?

Answer: P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e .   D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   w h a t   a c t i o n s   w o u l d   b e   p e r f o r m e d .   h e l p   f o r   b o o t s t r a p - t o k e n   T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e .


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s U p g r a d e   t h e   d e f a u l t   k u b e a d m   a d d o n s k u b e a d m   u p g r a d e   a p p l y   p h a s e   a d d o n   [ f l a g s ]   O p t i o n s - h ,   - - h e l p h e l p   f o r   a d d o n O p t i o n s   i n h e r i t e d   f r o m   p a r e n t   c o m m a n d s - - r o o t f s   s t r i n g T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .


Question: What is Synopsis?

Answer: U p g r a d e   t h e   d e f a u l t   k u b e a d m   a d d o n s   k u b e a d m   u p g r a d e   a p p l y   p h a s e   a d d o n   [ f l a g s ]


Question: What is Options?

Answer: h e l p   f o r   a d d o n


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s R u n   p o s t   u p g r a d e   t a s k s k u b e a d m   u p g r a d e   a p p l y   p h a s e   p o s t - u p g r a d e   [ f l a g s ]   O p t i o n s - - c o n f i g   s t r i n g P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e . - - d r y - r u n D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   w h a t   a c t i o n s   w o u l d   b e   p e r f o r m e d . - h ,   - - h e l p h e l p   f o r   p o s t - u p g r a d e - - k u b e c o n f i g   s t r i n g   D e f a u l t :   " / e t c / k u b e r n e t e s / a d m i n . c o n f " T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e . O p t i o n s   i n h e r i t e d   f r o m   p a r e n t   c o m m a n d s - - r o o t f s   s t r i n g T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .


Question: What is Synopsis?

Answer: R u n   p o s t   u p g r a d e   t a s k s   k u b e a d m   u p g r a d e   a p p l y   p h a s e   p o s t - u p g r a d e   [ f l a g s ]


Question: What is Options?

Answer: P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e .   D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   w h a t   a c t i o n s   w o u l d   b e   p e r f o r m e d .   h e l p   f o r   p o s t - u p g r a d e   T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e .


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .


Question: What is kubeadm upgrade node phase?

Answer: U s i n g   t h e   p h a s e s   o f   k u b e a d m   u p g r a d e   n o d e   y o u   c a n   c h o o s e   t o   e x e c u t e   t h e   s e p a r a t e   s t e p s   o f   t h e   u p g r a d e   o f   s e c o n d a r y   c o n t r o l - p l a n e   o r   w o r k e r   n o d e s .   S y n o p s i s U s e   t h i s   c o m m a n d   t o   i n v o k e   s i n g l e   p h a s e   o f   t h e   " n o d e "   w o r k f l o w k u b e a d m   u p g r a d e   n o d e   p h a s e   [ f l a g s ]   O p t i o n s - h ,   - - h e l p h e l p   f o r   p h a s e O p t i o n s   i n h e r i t e d   f r o m   p a r e n t   c o m m a n d s - - r o o t f s   s t r i n g T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .


Question: What is Synopsis?

Answer: U s e   t h i s   c o m m a n d   t o   i n v o k e   s i n g l e   p h a s e   o f   t h e   " n o d e "   w o r k f l o w   k u b e a d m   u p g r a d e   n o d e   p h a s e   [ f l a g s ]


Question: What is Options?

Answer: h e l p   f o r   p h a s e


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   R u n   u p g r a d e   n o d e   p r e - f l i g h t   c h e c k s S y n o p s i s R u n   p r e - f l i g h t   c h e c k s   f o r   k u b e a d m   u p g r a d e   n o d e . k u b e a d m   u p g r a d e   n o d e   p h a s e   p r e f l i g h t   [ f l a g s ]   O p t i o n s - - c o n f i g   s t r i n g P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e . - h ,   - - h e l p h e l p   f o r   p r e f l i g h t - - i g n o r e - p r e f l i g h t - e r r o r s   s t r i n g s A   l i s t   o f   c h e c k s   w h o s e   e r r o r s   w i l l   b e   s h o w n   a s   w a r n i n g s .   E x a m p l e :   ' I s P r i v i l e g e d U s e r , S w a p ' .   V a l u e   ' a l l '   i g n o r e s   e r r o r s   f r o m   a l l   c h e c k s . O p t i o n s   i n h e r i t e d   f r o m   p a r e n t   c o m m a n d s - - r o o t f s   s t r i n g T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   R u n   u p g r a d e   n o d e   p r e - f l i g h t   c h e c k s


Question: What is Synopsis?

Answer: R u n   p r e - f l i g h t   c h e c k s   f o r   k u b e a d m   u p g r a d e   n o d e .   k u b e a d m   u p g r a d e   n o d e   p h a s e   p r e f l i g h t   [ f l a g s ]


Question: What is Options?

Answer: P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e .   h e l p   f o r   p r e f l i g h t   A   l i s t   o f   c h e c k s   w h o s e   e r r o r s   w i l l   b e   s h o w n   a s   w a r n i n g s .   E x a m p l e :   ' I s P r i v i l e g e d U s e r , S w a p ' .   V a l u e   ' a l l '   i g n o r e s   e r r o r s   f r o m   a l l   c h e c k s .


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s U p g r a d e   t h e   c o n t r o l   p l a n e   i n s t a n c e   d e p l o y e d   o n   t h i s   n o d e ,   i f   a n y k u b e a d m   u p g r a d e   n o d e   p h a s e   c o n t r o l - p l a n e   [ f l a g s ]   O p t i o n s - - c e r t i f i c a t e - r e n e w a l   D e f a u l t :   t r u e P e r f o r m   t h e   r e n e w a l   o f   c e r t i f i c a t e s   u s e d   b y   c o m p o n e n t   c h a n g e d   d u r i n g   u p g r a d e s . - - c o n f i g   s t r i n g P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e . - - d r y - r u n D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   t h e   a c t i o n s   t h a t   w o u l d   b e   p e r f o r m e d . - - e t c d - u p g r a d e   D e f a u l t :   t r u e P e r f o r m   t h e   u p g r a d e   o f   e t c d . - h ,   - - h e l p h e l p   f o r   c o n t r o l - p l a n e - - k u b e c o n f i g   s t r i n g   D e f a u l t :   " / e t c / k u b e r n e t e s / a d m i n . c o n f " T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e . - - p a t c h e s   s t r i n g P a t h   t o   a   d i r e c t o r y   t h a t   c o n t a i n s   f i l e s   n a m e d   " t a r g e t [ s u f f i x ] [ + p a t c h t y p e ] . e x t e n s i o n " .   F o r   e x a m p l e ,   " k u b e - a p i s e r v e r 0 + m e r g e . y a m l "   o r   j u s t   " e t c d . j s o n " .   " t a r g e t "   c a n   b e   o n e   o f   " k u b e - a p i s e r v e r " ,   " k u b e - c o n t r o l l e


Question: What is Synopsis?

Answer: U p g r a d e   t h e   c o n t r o l   p l a n e   i n s t a n c e   d e p l o y e d   o n   t h i s   n o d e ,   i f   a n y   k u b e a d m   u p g r a d e   n o d e   p h a s e   c o n t r o l - p l a n e   [ f l a g s ]


Question: What is Options?

Answer: P e r f o r m   t h e   r e n e w a l   o f   c e r t i f i c a t e s   u s e d   b y   c o m p o n e n t   c h a n g e d   d u r i n g   u p g r a d e s .   P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e .   D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   t h e   a c t i o n s   t h a t   w o u l d   b e   p e r f o r m e d .   P e r f o r m   t h e   u p g r a d e   o f   e t c d .   h e l p   f o r   c o n t r o l - p l a n e   T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e .   P a t h   t o   a   d i r e c t o r y   t h a t   c o n t a i n s   f i l e s   n a m e d   " t a r g e t [ s u f f i x ] [ + p a t c h t y p e ] . e x t e n s i o n " .   F o r   e x a m p l e ,   " k u b e - a p i s e r v e r 0 + m e r g e . y a m l "   o r   j u s t   " e t c d . j s o n " .   " t a r g e t "   c a n   b e   o n e   o f   " k u b e - a p i s e r v e r " ,   " k u b e - c o n t r o l l e r - m a n a g e r " ,   " k u b e - s c h e d u l e r " ,   " e t c d " ,   " k u b e l e t c o n f i g u r a t i o n " ,   " c o r e d n s d e p l o y m e n t " .   " p a t c h t y p e "   c a n   b e   o n e   o f   " s t r a t e g i c " ,   " m e r g e "   o r   " j s o n "   a n d   t h e y   m a t c h   t h e   p a t c h   f o r m a t s   s u p p o r t e d   b y   k u b e c t l .   T h e   d e f a u l t   " p a t c h t y p e "   i s   " s t r a t e g i c " .   " e x t e n s i o n "   m u s t   b e   e i t h e r   " j s o n "   o r   " y a m l " .   " s u f f i x "   i s   a n   o p t i o n a l   s t r i n g   t h a t   c a n   b e   u s e d   t o   d e t e r m i n e   w h i c h   p a t c h e s   a r e   a p p l i e d   f i r s t   a l p h a - n u m e r i c a l l y .


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s U p g r a d e   t h e   k u b e l e t   c o n f i g u r a t i o n   f o r   t h i s   n o d e   b y   d o w n l o a d i n g   i t   f r o m   t h e   k u b e l e t - c o n f i g   C o n f i g M a p   s t o r e d   i n   t h e   c l u s t e r k u b e a d m   u p g r a d e   n o d e   p h a s e   k u b e l e t - c o n f i g   [ f l a g s ]   O p t i o n s - - c o n f i g   s t r i n g P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e . - - d r y - r u n D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   t h e   a c t i o n s   t h a t   w o u l d   b e   p e r f o r m e d . - h ,   - - h e l p h e l p   f o r   k u b e l e t - c o n f i g - - k u b e c o n f i g   s t r i n g   D e f a u l t :   " / e t c / k u b e r n e t e s / a d m i n . c o n f " T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e . - - p a t c h e s   s t r i n g P a t h   t o   a   d i r e c t o r y   t h a t   c o n t a i n s   f i l e s   n a m e d   " t a r g e t [ s u f f i x ] [ + p a t c h t y p e ] . e x t e n s i o n " .   F o r   e x a m p l e ,   " k u b e - a p i s e r v e r 0 + m e r g e . y a m l "   o r   j u s t   " e t c d . j s o n " .   " t a r g e t "   c a n   b e   o n e   o f   " k u b e - a p i s e r v e r " ,   " k u b e - c o n t r o l l e r - m a n a g e r " ,   " k u b e - s c h e d u l e r " ,   " e t c d " ,   " k u b e l e t c o n f i g u r a t i o n " ,   " c o r e d n s d e p l o y m e n t " .   " p a t c h t y p e "   c a n   b e   o n e   o f   "


Question: What is Synopsis?

Answer: U p g r a d e   t h e   k u b e l e t   c o n f i g u r a t i o n   f o r   t h i s   n o d e   b y   d o w n l o a d i n g   i t   f r o m   t h e   k u b e l e t - c o n f i g   C o n f i g M a p   s t o r e d   i n   t h e   c l u s t e r   k u b e a d m   u p g r a d e   n o d e   p h a s e   k u b e l e t - c o n f i g   [ f l a g s ]


Question: What is Options?

Answer: P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e .   D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   t h e   a c t i o n s   t h a t   w o u l d   b e   p e r f o r m e d .   h e l p   f o r   k u b e l e t - c o n f i g   T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e .   P a t h   t o   a   d i r e c t o r y   t h a t   c o n t a i n s   f i l e s   n a m e d   " t a r g e t [ s u f f i x ] [ + p a t c h t y p e ] . e x t e n s i o n " .   F o r   e x a m p l e ,   " k u b e - a p i s e r v e r 0 + m e r g e . y a m l "   o r   j u s t   " e t c d . j s o n " .   " t a r g e t "   c a n   b e   o n e   o f   " k u b e - a p i s e r v e r " ,   " k u b e - c o n t r o l l e r - m a n a g e r " ,   " k u b e - s c h e d u l e r " ,   " e t c d " ,   " k u b e l e t c o n f i g u r a t i o n " ,   " c o r e d n s d e p l o y m e n t " .   " p a t c h t y p e "   c a n   b e   o n e   o f   " s t r a t e g i c " ,   " m e r g e "   o r   " j s o n "   a n d   t h e y   m a t c h   t h e   p a t c h   f o r m a t s   s u p p o r t e d   b y   k u b e c t l .   T h e   d e f a u l t   " p a t c h t y p e "   i s   " s t r a t e g i c " .   " e x t e n s i o n "   m u s t   b e   e i t h e r   " j s o n "   o r   " y a m l " .   " s u f f i x "   i s   a n   o p t i o n a l   s t r i n g   t h a t   c a n   b e   u s e d   t o   d e t e r m i n e   w h i c h   p a t c h e s   a r e   a p p l i e d   f i r s t   a l p h a - n u m e r i c a l l y .


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s U p g r a d e   t h e   d e f a u l t   k u b e a d m   a d d o n s k u b e a d m   u p g r a d e   n o d e   p h a s e   a d d o n   [ f l a g s ]   O p t i o n s - h ,   - - h e l p h e l p   f o r   a d d o n O p t i o n s   i n h e r i t e d   f r o m   p a r e n t   c o m m a n d s - - r o o t f s   s t r i n g T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .


Question: What is Synopsis?

Answer: U p g r a d e   t h e   d e f a u l t   k u b e a d m   a d d o n s   k u b e a d m   u p g r a d e   n o d e   p h a s e   a d d o n   [ f l a g s ]


Question: What is Options?

Answer: h e l p   f o r   a d d o n


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .   S y n o p s i s R u n   p o s t   u p g r a d e   t a s k s k u b e a d m   u p g r a d e   n o d e   p h a s e   p o s t - u p g r a d e   [ f l a g s ]   O p t i o n s - - c o n f i g   s t r i n g P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e . - - d r y - r u n D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   t h e   a c t i o n s   t h a t   w o u l d   b e   p e r f o r m e d . - h ,   - - h e l p h e l p   f o r   p o s t - u p g r a d e - - k u b e c o n f i g   s t r i n g   D e f a u l t :   " / e t c / k u b e r n e t e s / a d m i n . c o n f " T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e . O p t i o n s   i n h e r i t e d   f r o m   p a r e n t   c o m m a n d s - - r o o t f s   s t r i n g T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .


Question: What is Synopsis?

Answer: R u n   p o s t   u p g r a d e   t a s k s   k u b e a d m   u p g r a d e   n o d e   p h a s e   p o s t - u p g r a d e   [ f l a g s ]


Question: What is Options?

Answer: P a t h   t o   a   k u b e a d m   c o n f i g u r a t i o n   f i l e .   D o   n o t   c h a n g e   a n y   s t a t e ,   j u s t   o u t p u t   t h e   a c t i o n s   t h a t   w o u l d   b e   p e r f o r m e d .   h e l p   f o r   p o s t - u p g r a d e   T h e   k u b e c o n f i g   f i l e   t o   u s e   w h e n   t a l k i n g   t o   t h e   c l u s t e r .   I f   t h e   f l a g   i s   n o t   s e t ,   a   s e t   o f   s t a n d a r d   l o c a t i o n s   c a n   b e   s e a r c h e d   f o r   a n   e x i s t i n g   k u b e c o n f i g   f i l e .


Question: What is Options inherited from parent commands?

Answer: T h e   p a t h   t o   t h e   ' r e a l '   h o s t   r o o t   f i l e s y s t e m .   T h i s   w i l l   c a u s e   k u b e a d m   t o   c h r o o t   i n t o   t h e   p r o v i d e d   p a t h .


Question: What is What's next?

Answer: k u b e a d m   i n i t   t o   b o o t s t r a p   a   K u b e r n e t e s   c o n t r o l - p l a n e   n o d e k u b e a d m   j o i n   t o   c o n n e c t   a   n o d e   t o   t h e   c l u s t e r k u b e a d m   r e s e t   t o   r e v e r t   a n y   c h a n g e s   m a d e   t o   t h i s   h o s t   b y   k u b e a d m   i n i t   o r   k u b e a d m   j o i n k u b e a d m   u p g r a d e   t o   u p g r a d e   a   k u b e a d m   n o d e k u b e a d m   a l p h a   t o   t r y   e x p e r i m e n t a l   f u n c t i o n a l i t y


Question: What is Certificate Management with kubeadm?

Answer: Certificate Management with kubeadmFEATURE STATE: Kubernetes v1.15 [stable]Client certificates generated by kubeadm expire after 1 year. This page explains how to manage certificate renewals with kubeadm. It also covers other tasks related to kubeadm certificate management.The Kubernetes project recommends upgrading to the latest patch releases promptly, and to ensure that you are running a supported minor release of Kubernetes. Following this recommendation helps you to stay secure.Before you beginYou should be familiar with PKI certificates and requirements in Kubernetes.You should be familiar with how to pass a configuration file to the kubeadm commands.This guide covers the usage of the openssl command (used for manual certificate signing, if you choose that approach), but you can use your preferred tools.Some of the steps here use sudo for administrator access. You can use any equivalent tool.Using custom certificatesBy default, kubeadm generates all the certificates needed for a cluster to run. You can override this behavior by providing your own certificates.To do so, you must place them in whatever directory is specified by the --cert-dir flag or the certificatesDir field of kubeadm's ClusterConfiguration. By default this is /etc/kubernetes/pki.If a given certificate and private key pair exists before running kubeadm init, kubeadm does not overwrite them. This means you can, for example, copy an existing CA into /etc/kubernetes/pki/ca.crt and /etc/kubernetes/pki/ca.key, and kubeadm will use this CA for signing the rest of the certificates.Choosing an encryption algorithmkubeadm allows you to choose an encryption algorithm that is used for creating public and private keys. That can be done by using the encryptionAlgorithm field of the kubeadm configuration:apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration encryptionAlgorithm: <ALGORITHM> <ALGORITHM> can be one of RSA-2048 (default), RSA-3072, RSA-4096 or ECDSA-P256.Choosing certificate validity periodkubeadm allows you to choose the validity period of CA and leaf certificates. That can be done by using the certificateValidityPeriod and caCertificateValidityPeriod fields of the kubeadm configuration:apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration certificateValidityPeriod: 8760h # Default: 365 days × 24 hours = 1 year caCertificateValidityPeriod: 87600h # Default: 365 days × 24 hours * 10 = 10 years The values of the fields follow the accepted format for Go's time.Duration values, with the longest supported unit being h (hours).External CA modeIt is also possible to provide only the ca.crt file and not the ca.key file (this is only available for the root CA file, not other cert pairs). If all other certificates and kubeconfig files are in place, kubeadm recognizes this condition and activates the "External CA" mode. kubeadm will proceed without the CA key on disk.Instead, run the controller-manager standalone with --controllers=csrsigner and point to the CA certifi


Question: How does Certificate Management with kubeadm work?

Answer: Certificate Management with kubeadmFEATURE STATE: Kubernetes v1.15 [stable]Client certificates generated by kubeadm expire after 1 year. This page explains how to manage certificate renewals with kubeadm. It also covers other tasks related to kubeadm certificate management.The Kubernetes project recommends upgrading to the latest patch releases promptly, and to ensure that you are running a supported minor release of Kubernetes. Following this recommendation helps you to stay secure.Before you beginYou should be familiar with PKI certificates and requirements in Kubernetes.You should be familiar with how to pass a configuration file to the kubeadm commands.This guide covers the usage of the openssl command (used for manual certificate signing, if you choose that approach), but you can use your preferred tools.Some of the steps here use sudo for administrator access. You can use any equivalent tool.Using custom certificatesBy default, kubeadm generates all the certificates needed for a cluster to run. You can override this behavior by providing your own certificates.To do so, you must place them in whatever directory is specified by the --cert-dir flag or the certificatesDir field of kubeadm's ClusterConfiguration. By default this is /etc/kubernetes/pki.If a given certificate and private key pair exists before running kubeadm init, kubeadm does not overwrite them. This means you can, for example, copy an existing CA into /etc/kubernetes/pki/ca.crt and /etc/kubernetes/pki/ca.key, and kubeadm will use this CA for signing the rest of the certificates.Choosing an encryption algorithmkubeadm allows you to choose an encryption algorithm that is used for creating public and private keys. That can be done by using the encryptionAlgorithm field of the kubeadm configuration:apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration encryptionAlgorithm: <ALGORITHM> <ALGORITHM> can be one of RSA-2048 (default), RSA-3072, RSA-4096 or ECDSA-P256.Choosing certificate validity periodkubeadm allows you to choose the validity period of CA and leaf certificates. That can be done by using the certificateValidityPeriod and caCertificateValidityPeriod fields of the kubeadm configuration:apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration certificateValidityPeriod: 8760h # Default: 365 days × 24 hours = 1 year caCertificateValidityPeriod: 87600h # Default: 365 days × 24 hours * 10 = 10 years The values of the fields follow the accepted format for Go's time.Duration values, with the longest supported unit being h (hours).External CA modeIt is also possible to provide only the ca.crt file and not the ca.key file (this is only available for the root CA file, not other cert pairs). If all other certificates and kubeconfig files are in place, kubeadm recognizes this condition and activates the "External CA" mode. kubeadm will proceed without the CA key on disk.Instead, run the controller-manager standalone with --controllers=csrsigner and point to the CA certifi


Question: When would you use Certificate Management with kubeadm?

Answer: Certificate Management with kubeadmFEATURE STATE: Kubernetes v1.15 [stable]Client certificates generated by kubeadm expire after 1 year. This page explains how to manage certificate renewals with kubeadm. It also covers other tasks related to kubeadm certificate management.The Kubernetes project recommends upgrading to the latest patch releases promptly, and to ensure that you are running a supported minor release of Kubernetes. Following this recommendation helps you to stay secure.Before you beginYou should be familiar with PKI certificates and requirements in Kubernetes.You should be familiar with how to pass a configuration file to the kubeadm commands.This guide covers the usage of the openssl command (used for manual certificate signing, if you choose that approach), but you can use your preferred tools.Some of the steps here use sudo for administrator access. You can use any equivalent tool.Using custom certificatesBy default, kubeadm generates all the certificates needed for a cluster to run. You can override this behavior by providing your own certificates.To do so, you must place them in whatever directory is specified by the --cert-dir flag or the certificatesDir field of kubeadm's ClusterConfiguration. By default this is /etc/kubernetes/pki.If a given certificate and private key pair exists before running kubeadm init, kubeadm does not overwrite them. This means you can, for example, copy an existing CA into /etc/kubernetes/pki/ca.crt and /etc/kubernetes/pki/ca.key, and kubeadm will use this CA for signing the rest of the certificates.Choosing an encryption algorithmkubeadm allows you to choose an encryption algorithm that is used for creating public and private keys. That can be done by using the encryptionAlgorithm field of the kubeadm configuration:apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration encryptionAlgorithm: <ALGORITHM> <ALGORITHM> can be one of RSA-2048 (default), RSA-3072, RSA-4096 or ECDSA-P256.Choosing certificate validity periodkubeadm allows you to choose the validity period of CA and leaf certificates. That can be done by using the certificateValidityPeriod and caCertificateValidityPeriod fields of the kubeadm configuration:apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration certificateValidityPeriod: 8760h # Default: 365 days × 24 hours = 1 year caCertificateValidityPeriod: 87600h # Default: 365 days × 24 hours * 10 = 10 years The values of the fields follow the accepted format for Go's time.Duration values, with the longest supported unit being h (hours).External CA modeIt is also possible to provide only the ca.crt file and not the ca.key file (this is only available for the root CA file, not other cert pairs). If all other certificates and kubeconfig files are in place, kubeadm recognizes this condition and activates the "External CA" mode. kubeadm will proceed without the CA key on disk.Instead, run the controller-manager standalone with --controllers=csrsigner and point to the CA certifi


Question: What are the benefits of Certificate Management with kubeadm?

Answer: Certificate Management with kubeadmFEATURE STATE: Kubernetes v1.15 [stable]Client certificates generated by kubeadm expire after 1 year. This page explains how to manage certificate renewals with kubeadm. It also covers other tasks related to kubeadm certificate management.The Kubernetes project recommends upgrading to the latest patch releases promptly, and to ensure that you are running a supported minor release of Kubernetes. Following this recommendation helps you to stay secure.Before you beginYou should be familiar with PKI certificates and requirements in Kubernetes.You should be familiar with how to pass a configuration file to the kubeadm commands.This guide covers the usage of the openssl command (used for manual certificate signing, if you choose that approach), but you can use your preferred tools.Some of the steps here use sudo for administrator access. You can use any equivalent tool.Using custom certificatesBy default, kubeadm generates all the certificates needed for a cluster to run. You can override this behavior by providing your own certificates.To do so, you must place them in whatever directory is specified by the --cert-dir flag or the certificatesDir field of kubeadm's ClusterConfiguration. By default this is /etc/kubernetes/pki.If a given certificate and private key pair exists before running kubeadm init, kubeadm does not overwrite them. This means you can, for example, copy an existing CA into /etc/kubernetes/pki/ca.crt and /etc/kubernetes/pki/ca.key, and kubeadm will use this CA for signing the rest of the certificates.Choosing an encryption algorithmkubeadm allows you to choose an encryption algorithm that is used for creating public and private keys. That can be done by using the encryptionAlgorithm field of the kubeadm configuration:apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration encryptionAlgorithm: <ALGORITHM> <ALGORITHM> can be one of RSA-2048 (default), RSA-3072, RSA-4096 or ECDSA-P256.Choosing certificate validity periodkubeadm allows you to choose the validity period of CA and leaf certificates. That can be done by using the certificateValidityPeriod and caCertificateValidityPeriod fields of the kubeadm configuration:apiVersion: kubeadm.k8s.io/v1beta4 kind: ClusterConfiguration certificateValidityPeriod: 8760h # Default: 365 days × 24 hours = 1 year caCertificateValidityPeriod: 87600h # Default: 365 days × 24 hours * 10 = 10 years The values of the fields follow the accepted format for Go's time.Duration values, with the longest supported unit being h (hours).External CA modeIt is also possible to provide only the ca.crt file and not the ca.key file (this is only available for the root CA file, not other cert pairs). If all other certificates and kubeconfig files are in place, kubeadm recognizes this condition and activates the "External CA" mode. kubeadm will proceed without the CA key on disk.Instead, run the controller-manager standalone with --controllers=csrsigner and point to the CA certifi


Question: What is Certificate Management with kubeadm?

Answer: C l i e n t   c e r t i f i c a t e s   g e n e r a t e d   b y   k u b e a d m   e x p i r e   a f t e r   1   y e a r .   T h i s   p a g e   e x p l a i n s   h o w   t o   m a n a g e   c e r t i f i c a t e   r e n e w a l s   w i t h   k u b e a d m .   I t   a l s o   c o v e r s   o t h e r   t a s k s   r e l a t e d   t o   k u b e a d m   c e r t i f i c a t e   m a n a g e m e n t .   T h e   K u b e r n e t e s   p r o j e c t   r e c o m m e n d s   u p g r a d i n g   t o   t h e   l a t e s t   p a t c h   r e l e a s e s   p r o m p t l y ,   a n d   t o   e n s u r e   t h a t   y o u   a r e   r u n n i n g   a   s u p p o r t e d   m i n o r   r e l e a s e   o f   K u b e r n e t e s .   F o l l o w i n g   t h i s   r e c o m m e n d a t i o n   h e l p s   y o u   t o   s t a y   s e c u r e .


Question: What is Before you begin?

Answer: Y o u   s h o u l d   b e   f a m i l i a r   w i t h   P K I   c e r t i f i c a t e s   a n d   r e q u i r e m e n t s   i n   K u b e r n e t e s .   Y o u   s h o u l d   b e   f a m i l i a r   w i t h   h o w   t o   p a s s   a   c o n f i g u r a t i o n   f i l e   t o   t h e   k u b e a d m   c o m m a n d s .   T h i s   g u i d e   c o v e r s   t h e   u s a g e   o f   t h e   o p e n s s l   c o m m a n d   ( u s e d   f o r   m a n u a l   c e r t i f i c a t e   s i g n i n g ,   i f   y o u   c h o o s e   t h a t   a p p r o a c h ) ,   b u t   y o u   c a n   u s e   y o u r   p r e f e r r e d   t o o l s .   S o m e   o f   t h e   s t e p s   h e r e   u s e   s u d o   f o r   a d m i n i s t r a t o r   a c c e s s .   Y o u   c a n   u s e   a n y   e q u i v a l e n t   t o o l .


Question: What is Using custom certificates?

Answer: B y   d e f a u l t ,   k u b e a d m   g e n e r a t e s   a l l   t h e   c e r t i f i c a t e s   n e e d e d   f o r   a   c l u s t e r   t o   r u n .   Y o u   c a n   o v e r r i d e   t h i s   b e h a v i o r   b y   p r o v i d i n g   y o u r   o w n   c e r t i f i c a t e s .   T o   d o   s o ,   y o u   m u s t   p l a c e   t h e m   i n   w h a t e v e r   d i r e c t o r y   i s   s p e c i f i e d   b y   t h e   - - c e r t - d i r   f l a g   o r   t h e   c e r t i f i c a t e s D i r   f i e l d   o f   k u b e a d m ' s   C l u s t e r C o n f i g u r a t i o n .   B y   d e f a u l t   t h i s   i s   / e t c / k u b e r n e t e s / p k i .   I f   a   g i v e n   c e r t i f i c a t e   a n d   p r i v a t e   k e y   p a i r   e x i s t s   b e f o r e   r u n n i n g   k u b e a d m   i n i t ,   k u b e a d m   d o e s   n o t   o v e r w r i t e   t h e m .   T h i s   m e a n s   y o u   c a n ,   f o r   e x a m p l e ,   c o p y   a n   e x i s t i n g   C A   i n t o   / e t c / k u b e r n e t e s / p k i / c a . c r t   a n d   / e t c / k u b e r n e t e s / p k i / c a . k e y ,   a n d   k u b e a d m   w i l l   u s e   t h i s   C A   f o r   s i g n i n g   t h e   r e s t   o f   t h e   c e r t i f i c a t e s .


Question: What is Choosing an encryption algorithm?

Answer: k u b e a d m   a l l o w s   y o u   t o   c h o o s e   a n   e n c r y p t i o n   a l g o r i t h m   t h a t   i s   u s e d   f o r   c r e a t i n g   p u b l i c   a n d   p r i v a t e   k e y s .   T h a t   c a n   b e   d o n e   b y   u s i n g   t h e   e n c r y p t i o n A l g o r i t h m   f i e l d   o f   t h e   k u b e a d m   c o n f i g u r a t i o n :   a p i V e r s i o n :   k u b e a d m . k 8 s . i o / v 1 b e t a 4   k i n d :   C l u s t e r C o n f i g u r a t i o n   e n c r y p t i o n A l g o r i t h m :   < A L G O R I T H M >   < A L G O R I T H M >   c a n   b e   o n e   o f   R S A - 2 0 4 8   ( d e f a u l t ) ,   R S A - 3 0 7 2 ,   R S A - 4 0 9 6   o r   E C D S A - P 2 5 6 .


Question: What is Choosing certificate validity period?

Answer: k u b e a d m   a l l o w s   y o u   t o   c h o o s e   t h e   v a l i d i t y   p e r i o d   o f   C A   a n d   l e a f   c e r t i f i c a t e s .   T h a t   c a n   b e   d o n e   b y   u s i n g   t h e   c e r t i f i c a t e V a l i d i t y P e r i o d   a n d   c a C e r t i f i c a t e V a l i d i t y P e r i o d   f i e l d s   o f   t h e   k u b e a d m   c o n f i g u r a t i o n :   a p i V e r s i o n :   k u b e a d m . k 8 s . i o / v 1 b e t a 4   k i n d :   C l u s t e r C o n f i g u r a t i o n   c e r t i f i c a t e V a l i d i t y P e r i o d :   8 7 6 0 h   #   D e f a u l t :   3 6 5   d a y s   ×   2 4   h o u r s   =   1   y e a r   c a C e r t i f i c a t e V a l i d i t y P e r i o d :   8 7 6 0 0 h   #   D e f a u l t :   3 6 5   d a y s   ×   2 4   h o u r s   *   1 0   =   1 0   y e a r s   T h e   v a l u e s   o f   t h e   f i e l d s   f o l l o w   t h e   a c c e p t e d   f o r m a t   f o r   G o ' s   t i m e . D u r a t i o n   v a l u e s ,   w i t h   t h e   l o n g e s t   s u p p o r t e d   u n i t   b e i n g   h   ( h o u r s ) .


Question: What is External CA mode?

Answer: I t   i s   a l s o   p o s s i b l e   t o   p r o v i d e   o n l y   t h e   c a . c r t   f i l e   a n d   n o t   t h e   c a . k e y   f i l e   ( t h i s   i s   o n l y   a v a i l a b l e   f o r   t h e   r o o t   C A   f i l e ,   n o t   o t h e r   c e r t   p a i r s ) .   I f   a l l   o t h e r   c e r t i f i c a t e s   a n d   k u b e c o n f i g   f i l e s   a r e   i n   p l a c e ,   k u b e a d m   r e c o g n i z e s   t h i s   c o n d i t i o n   a n d   a c t i v a t e s   t h e   " E x t e r n a l   C A "   m o d e .   k u b e a d m   w i l l   p r o c e e d   w i t h o u t   t h e   C A   k e y   o n   d i s k .   I n s t e a d ,   r u n   t h e   c o n t r o l l e r - m a n a g e r   s t a n d a l o n e   w i t h   - - c o n t r o l l e r s = c s r s i g n e r   a n d   p o i n t   t o   t h e   C A   c e r t i f i c a t e   a n d   k e y .   T h e r e   a r e   v a r i o u s   w a y s   t o   p r e p a r e   t h e   c o m p o n e n t   c r e d e n t i a l s   w h e n   u s i n g   e x t e r n a l   C A   m o d e .


Question: What is Manual preparation of component credentials?

Answer: P K I   c e r t i f i c a t e s   a n d   r e q u i r e m e n t s   i n c l u d e s   i n f o r m a t i o n   o n   h o w   t o   p r e p a r e   a l l   t h e   r e q u i r e d   b y   k u b e a d m   c o m p o n e n t   c r e d e n t i a l s   m a n u a l l y .   T h i s   g u i d e   c o v e r s   t h e   u s a g e   o f   t h e   o p e n s s l   c o m m a n d   ( u s e d   f o r   m a n u a l   c e r t i f i c a t e   s i g n i n g ,   i f   y o u   c h o o s e   t h a t   a p p r o a c h ) ,   b u t   y o u   c a n   u s e   y o u r   p r e f e r r e d   t o o l s .


Question: What is Preparation of credentials by signing CSRs generated by kubeadm?

Answer: k u b e a d m   c a n   g e n e r a t e   C S R   f i l e s   t h a t   y o u   c a n   s i g n   m a n u a l l y   w i t h   t o o l s   l i k e   o p e n s s l   a n d   y o u r   e x t e r n a l   C A .   T h e s e   C S R   f i l e s   w i l l   i n c l u d e   a l l   t h e   s p e c i f i c a t i o n   f o r   c r e d e n t i a l s   t h a t   c o m p o n e n t s   d e p l o y e d   b y   k u b e a d m   r e q u i r e .


Question: What is Automated preparation of component credentials by using kubeadm phases?

Answer: A l t e r n a t i v e l y ,   i t   i s   p o s s i b l e   t o   u s e   k u b e a d m   p h a s e   c o m m a n d s   t o   a u t o m a t e   t h i s   p r o c e s s .   G o   t o   a   h o s t   t h a t   y o u   w a n t   t o   p r e p a r e   a s   a   k u b e a d m   c o n t r o l   p l a n e   n o d e   w i t h   e x t e r n a l   C A . C o p y   t h e   e x t e r n a l   C A   f i l e s   c a . c r t   a n d   c a . k e y   t h a t   y o u   h a v e   i n t o   / e t c / k u b e r n e t e s / p k i   o n   t h e   n o d e . P r e p a r e   a   t e m p o r a r y   k u b e a d m   c o n f i g u r a t i o n   f i l e   c a l l e d   c o n f i g . y a m l   t h a t   c a n   b e   u s e d   w i t h   k u b e a d m   i n i t .   M a k e   s u r e   t h a t   t h i s   f i l e   i n c l u d e s   a n y   r e l e v a n t   c l u s t e r   w i d e   o r   h o s t - s p e c i f i c   i n f o r m a t i o n   t h a t   c o u l d   b e   i n c l u d e d   i n   c e r t i f i c a t e s ,   s u c h   a s ,   C l u s t e r C o n f i g u r a t i o n . c o n t r o l P l a n e E n d p o i n t ,   C l u s t e r C o n f i g u r a t i o n . c e r t S A N s   a n d   I n i t C o n f i g u r a t i o n . A P I E n d p o i n t . O n   t h e   s a m e   h o s t   e x e c u t e   t h e   c o m m a n d s   k u b e a d m   i n i t   p h a s e   k u b e c o n f i g   a l l   - - c o n f i g   c o n f i g . y a m l   a n d   k u b e a d m   i n i t   p h a s e   c e r t s   a l l   - - c o n f i g   c o n f i g . y a m l .   T h i s   w i l l   g e n e r a t e   a l l   r e q u i r e d   k u b e c o n f i g   f i l e s   a n d   c e r t i f i c a t e s   u n d e r   / e t c / k u b e r n e t e s /   a n d   i t s   p k i   s u b   d i r e c t o r y . I n s p e c t   t h e   g e n e r a t e d   f i l e s .   D e l e t e   / e t c / k u b e r n e t e s / p k i / c a . k e y ,   d e l e t e   o r   m o v e   t o   a   s a f e   l o c a t i o n   t h e   f i l e   / e t c / k u b e r n e t e


Question: What is Note:?

Answer: Y o u   c a n   u s e   t h e   c h e c k - e x p i r a t i o n   s u b c o m m a n d   t o   c h e c k   w h e n   c e r t i f i c a t e s   e x p i r e :   k u b e a d m   c e r t s   c h e c k - e x p i r a t i o n   T h e   o u t p u t   i s   s i m i l a r   t o   t h i s :   C E R T I F I C A T E   E X P I R E S   R E S I D U A L   T I M E   C E R T I F I C A T E   A U T H O R I T Y   E X T E R N A L L Y   M A N A G E D   a d m i n . c o n f   D e c   3 0 ,   2 0 2 0   2 3 : 3 6   U T C   3 6 4 d   n o   a p i s e r v e r   D e c   3 0 ,   2 0 2 0   2 3 : 3 6   U T C   3 6 4 d   c a   n o   a p i s e r v e r - e t c d - c l i e n t   D e c   3 0 ,   2 0 2 0   2 3 : 3 6   U T C   3 6 4 d   e t c d - c a   n o   a p i s e r v e r - k u b e l e t - c l i e n t   D e c   3 0 ,   2 0 2 0   2 3 : 3 6   U T C   3 6 4 d   c a   n o   c o n t r o l l e r - m a n a g e r . c o n f   D e c   3 0 ,   2 0 2 0   2 3 : 3 6   U T C   3 6 4 d   n o   e t c d - h e a l t h c h e c k - c l i e n t   D e c   3 0 ,   2 0 2 0   2 3 : 3 6   U T C   3 6 4 d   e t c d - c a   n o   e t c d - p e e r   D e c   3 0 ,   2 0 2 0   2 3 : 3 6   U T C   3 6 4 d   e t c d - c a   n o   e t c d - s e r v e r   D e c   3 0 ,   2 0 2 0   2 3 : 3 6   U T C   3 6 4 d   e t c d - c a   n o   f r o n t - p r o x y - c l i e n t   D e c   3 0 ,   2 0 2 0   2 3 : 3 6   U T C   3 6 4 d   f r o n t - p r o x y - c a   n o   s c h e d u l e r . c o n f   D e c   3 0 ,   2 0 2 0   2 3 : 3 6   U T C   3 6 4 d   n o   C E R T I F I C A T E   A U T H O R I T Y   E X P I R E S   R E S I D U A L   T I M E   E X T E R N A L L Y   M A N A G E D   c a   D e c   2 8 ,   2 0 2 9   2 3 : 3 6   U T C   9 y   n o   e t c d - c a   D e c   2 8 ,   2 0 2 9   2 3 : 3 6   U T C   9 y   n o   f r o n t - p r o x y - c a   D e c   2 8 ,   2 0 2 9   2 3 : 3 6   U T C   9 y   n o   T h e   c o m m a n d   s h o w s   e x p i r a t i o n / r e s i d u a l   t i m e   f o r   t h e   c l i e n t   c e r t i f i c a t e s   i n


Question: What is Note:?

Answer: O n   n o d e s   c r e a t e d   w i t h   k u b e a d m   i n i t   f r o m   v e r s i o n s   p r i o r   t o   k u b e a d m   v e r s i o n   1 . 1 7 ,   t h e r e   i s   a   b u g   w h e r e   y o u   m a n u a l l y   h a v e   t o   m o d i f y   t h e   c o n t e n t s   o f   k u b e l e t . c o n f .   A f t e r   k u b e a d m   i n i t   f i n i s h e s ,   y o u   s h o u l d   u p d a t e   k u b e l e t . c o n f   t o   p o i n t   t o   t h e   r o t a t e d   k u b e l e t   c l i e n t   c e r t i f i c a t e s ,   b y   r e p l a c i n g   c l i e n t - c e r t i f i c a t e - d a t a   a n d   c l i e n t - k e y - d a t a   w i t h :   c l i e n t - c e r t i f i c a t e :   / v a r / l i b / k u b e l e t / p k i / k u b e l e t - c l i e n t - c u r r e n t . p e m   c l i e n t - k e y :   / v a r / l i b / k u b e l e t / p k i / k u b e l e t - c l i e n t - c u r r e n t . p e m


Question: What is Automatic certificate renewal?

Answer: k u b e a d m   r e n e w s   a l l   t h e   c e r t i f i c a t e s   d u r i n g   c o n t r o l   p l a n e   u p g r a d e .   T h i s   f e a t u r e   i s   d e s i g n e d   f o r   a d d r e s s i n g   t h e   s i m p l e s t   u s e   c a s e s ;   i f   y o u   d o n ' t   h a v e   s p e c i f i c   r e q u i r e m e n t s   o n   c e r t i f i c a t e   r e n e w a l   a n d   p e r f o r m   K u b e r n e t e s   v e r s i o n   u p g r a d e s   r e g u l a r l y   ( l e s s   t h a n   1   y e a r   i n   b e t w e e n   e a c h   u p g r a d e ) ,   k u b e a d m   w i l l   t a k e   c a r e   o f   k e e p i n g   y o u r   c l u s t e r   u p   t o   d a t e   a n d   r e a s o n a b l y   s e c u r e .   I f   y o u   h a v e   m o r e   c o m p l e x   r e q u i r e m e n t s   f o r   c e r t i f i c a t e   r e n e w a l ,   y o u   c a n   o p t   o u t   f r o m   t h e   d e f a u l t   b e h a v i o r   b y   p a s s i n g   - - c e r t i f i c a t e - r e n e w a l = f a l s e   t o   k u b e a d m   u p g r a d e   a p p l y   o r   t o   k u b e a d m   u p g r a d e   n o d e .