容器编排技术 -- Kubernetes kubectl delete 命令详解

1 kubectl delete
2 语法
3 示例
4 Flags

kubectl delete

通过配置文件名、stdin、资源名称或label选择器来删除资源。

支持JSON和YAML格式文件。可以只指定一种类型的参数：文件名、资源名称或label选择器。

有些资源，如pod，支持优雅的（graceful）删除，因为这些资源一般是集群中的实体，所以删除不可能会立即生效，这些资源在强制终止之前默认定义了一个周期（宽限期），但是你可以使用--grace-period flag来覆盖该值，或者通过pass --now设置该周期为1。

如果托管Pod的Node节点已经停止或者无法连接API Server，使用delete命令删除Pod需等待时间更长。要强制删除资源，需指定- force flag，且设置周期（宽限期）为0。

如果执行强制删除Pod，则调度程序会在节点释放这些Pod之前将新的Pod放在这些节点上，并使之前Pod立即被逐出。

注意：执行delete命令时不会检查资源版本，如果在执行delete操作时有人进行了更新操作，那么更新操作将连同资源一起被删除。

语法

$ delete ([-f FILENAME] | TYPE [(NAME | -l label | --all)])

示例

使用 pod.json中指定的资源类型和名称删除pod。

kubectl delete -f ./pod.json

根据传入stdin的JSON所指定的类型和名称删除pod。

cat pod.json | kubectl delete -f -

删除名为“baz”和“foo”的Pod和Service。

kubectl delete pod,service baz foo

删除 Label name = myLabel的pod和Service。

kubectl delete pods,services -l name=myLabel

强制删除dead node上的pod

kubectl delete pod foo --grace-period=0 --force

删除所有pod

kubectl delete pods --all

Flags

Name	Shorthand	Default	Usage
all		false	select all resources in the namespace of the specified resource types.
cascade		true	If true, cascade the deletion of the resources managed by this resource (e.g. Pods created by a ReplicationController). Default true.
filename	f	[]	Filename, directory, or URL to files containing the resource to delete.
force		false	Immediate deletion of some resources may result in inconsistency or data loss and requires confirmation.
grace-period		-1	Period of time in seconds given to the resource to terminate gracefully. Ignored if negative.
ignore-not-found		false	Treat "resource not found" as a successful delete. Defaults to "true" when --all is specified.
include-extended-apis		true	If true, include definitions of new APIs via calls to the API server. [default true]
now		false	If true, resources are signaled for immediate shutdown (same as --grace-period=1).
output	o		Output mode. Use "-o name" for shorter output (resource/name).
recursive	R	false	Process the directory used in -f, --filename recursively. Useful when you want to manage related manifests organized within the same directory.
selector	l		Selector (label query) to filter on.
timeout		0s	The length of time to wait before giving up on a delete, zero means determine a timeout from the size of the object