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

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

 

• 1 kubectl patch
• 2 语法
• 3 示例
• 4 Flags

kubectl patch

使用（patch）补丁修改、更新资源的字段。

支持JSON和YAML格式。

请参阅https://htmlpreview.github.io/?https://github.com/kubernetes/kubernetes/blob/HEAD/docs/api-reference/v1/definitions.html中说明，查找资源字段是否为可变的。

语法

$ patch (-f FILENAME | TYPE NAME) -p PATCH

示例

使用patch更新Node节点。

kubectl patch node k8s-node-1 -p '{"spec":{"unschedulable":true}}'

使用patch更新由“node.json”文件中指定的类型和名称标识的节点

kubectl patch -f node.json -p '{"spec":{"unschedulable":true}}'

更新容器的镜像

kubectl patch pod valid-pod -p '{"spec":{"containers":[{"name":"kubernetes-serve-hostname","image":"new image"}]}}'

kubectl patch pod valid-pod --type='json' -p='[{"op": "replace", "path": "/spec/containers/0/image", "value":"new image"}]'

Flags

Name	Shorthand	Default	Usage
allow-missing-template-keys		true	If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats.
filename	f	[]	Filename, directory, or URL to files identifying the resource to update
include-extended-apis		true	If true, include definitions of new APIs via calls to the API server. [default true]
local		false	If true, patch will operate on the content of the file, not the server-side resource.
no-headers		false	When using the default or custom-column output format, don't print headers (default print headers).
output	o		Output format. One of: json|yaml|wide|name|custom-columns=...|custom-columns-file=...|go-template=...|go-template-file=...|jsonpath=...|jsonpath-file=... See custom columns [http://kubernetes.io/docs/user-guide/kubectl-overview/#custom-columns], golang template [http://golang.org/pkg/text/template/#pkg-overview] and jsonpath template [http://kubernetes.io/docs/user-guide/jsonpath].
output-version			DEPRECATED: To use a specific API version, fully-qualify the resource, version, and group (for example: 'jobs.v1.batch/myjob').
patch	p		The patch to be applied to the resource JSON file.
record		false	Record current kubectl command in the resource annotation. If set to false, do not record the command. If set to true, record the command. If not set, default to updating the existing annotation value only if one already exists.
recursive	R	false	Process the directory used in -f, --filename recursively. Useful when you want to manage related manifests organized within the same directory.
show-all	a	false	When printing, show all resources (default hide terminated pods.)
show-labels		false	When printing, show all labels as the last column (default hide labels column)
sort-by			If non-empty, sort list types using this field specification. The field specification is expressed as a JSONPath expression (e.g. '{.metadata.name}'). The field in the API resource specified by this JSONPath expression must be an integer or a string.
template			Template string or path to template file to use when -o=go-template, -o=go-template-file. The template format is golang templates [http://golang.org/pkg/text/template/#pkg-overview].
type		strategic	The type of patch being provided; one of [json merge strategic]