kubectl set

配置应用资源。

使用这些命令能帮你更改现有应用资源一些信息。

语法

$ set SUBCOMMAND

子命令

• image
• resources
• selector
• subject

kubectl scale

扩容或缩容 Deployment、ReplicaSet、Replication Controller或 Job 中Pod数量。

scale也可以指定多个前提条件，如：当前副本数量或 --resource-version ，进行伸缩比例设置前，系统会先验证前提条件是否成立。

语法

$ scale [--resource-version=version] [--current-replicas=count] --replicas=COUNT (-f FILENAME | TYPE NAME)

示例

将名为foo中的pod副本数设置为3。

kubectl scale --replicas=3 rs/foo

将由“foo.yaml”配置文件中指定的资源对象和名称标识的Pod资源副本设为3。

kubectl scale --replicas=3 -f foo.yaml

如果当前副本数为2，则将其扩展至3。

kubectl scale --current-replicas=2 --replicas=3 deployment/mysql

设置多个RC中Pod副本数量。

kubectl scale --replicas=5 rc/foo rc/bar rc/baz

kubectl rollout undo

回滚到之前的版本。

语法

$ undo (TYPE NAME | TYPE/NAME) [flags]

示例

回滚到之前的deployment版本

kubectl rollout undo deployment/abc

kubectl rollout undo --dry-run=true deployment/abc

回滚到daemonset 修订3版本

kubectl rollout undo daemonset/abc --to-revision=3

Flags

Name	Shorthand	Default	Usage
dry-run		false	If true, only print the object that would be sent, without sending it.
filename	f	[]	Filename, directory, or URL to files identifying the resource to get from a server.
recursive	R	false	Process the directory used in -f, --filename recursively. Useful when you want to manage related manifests organized within the same directory.
to-revision		0	The revision to rollback to. Default to 0 (last revision).

 

kubectl rollout status

查看资源的状态。

使用—watch = false 来查看当前状态，需要查看特定修订版本状态 请使用--revision = N 来指定。

语法

$ status (TYPE NAME | TYPE/NAME) [flags]

示例

查看deployment的状态

kubectl rollout status deployment/nginx

Flags

Name	Shorthand	Default	Usage
filename	f	[]	Filename, directory, or URL to files identifying the resource to get from a server.
recursive	R	false	Process the directory used in -f, --filename recursively. Useful when you want to manage related manifests organized within the same directory.
revision		0	Pin to a specific revision for showing its status. Defaults to 0 (last revision).
watch	w	true	Watch the status of the rollout until it's done.

 

kubectl rollout resume

恢复已暂停的资源

被pause命令暂停的资源将不会被控制器协调使用。可以通过resume来恢复资源。目前仅支持恢复deployment资源。

语法

$ resume RESOURCE

示例

恢复已暂停的 deployment

kubectl rollout resume deployment/nginx

Flags

Name	Shorthand	Default	Usage
filename	f	[]	Filename, directory, or URL to files identifying the resource to get from a server.
recursive	R	false	Process the directory used in -f, --filename recursively. Useful when you want to manage related manifests organized within the same directory.

 

kubectl rollout pause

将提供的资源标记为暂停

被pause命令暂停的资源不会被控制器协调使用，可以是“kubectl rollout resume”命令恢复已暂停资源。

目前仅支持的资源：deployments。

语法

$ pause RESOURCE

示例

将deployment标记为暂停。＃只要deployment在暂停中，使用deployment更新将不会生效。

kubectl rollout pause deployment/nginx

Flags

Name	Shorthand	Default	Usage
filename	f	[]	Filename, directory, or URL to files identifying the resource to get from a server.
recursive	R	false	Process the directory used in -f, --filename recursively. Useful when you want to manage related manifests organized within the same directory.