kubectl 命令详解：create

Posted 2022-04-30 youzhouliu

一、命令作用

通过配置文件名或stdin创建一个集群资源对象。

支持JSON和YAML格式的文件。

语法如下：

kubectl create -f FILENAME

二、命令选项

在安装有k8s的机器上输入如下命令：

sudo kubectl create --help
或
kubectl create --help

根据权限选择是否需要 sudo。

可以看到类似如下输出：

Create a resource from a file or from stdin.

 JSON and YAML formats are accepted.

Examples:
  # Create a pod using the data in pod.json.
  kubectl create -f ./pod.json

  # Create a pod based on the JSON passed into stdin.
  cat pod.json | kubectl create -f -

  # Edit the data in docker-registry.yaml in JSON then create the resource using the edited data.
  kubectl create -f docker-registry.yaml --edit -o json

该命令可用命令如下：

Available Commands:
  clusterrole         Create a ClusterRole.
  clusterrolebinding  为一个指定的 ClusterRole 创建一个 ClusterRoleBinding
  configmap           从本地 file, directory 或者 literal value 创建一个 configmap
  cronjob             Create a cronjob with the specified name.
  deployment          Create a deployment with the specified name.
  ingress             Create an ingress with the specified name.
  job                 Create a job with the specified name.
  namespace           创建一个指定名称的 namespace
  poddisruptionbudget 创建一个指定名称的 pod disruption budget.
  priorityclass       Create a priorityclass with the specified name.
  quota               创建一个指定名称的 quota.
  role                Create a role with single rule.
  rolebinding         为一个指定的 Role 或者 ClusterRole创建一个 RoleBinding
  secret              使用指定的 subcommand 创建一个 secret
  service             使用指定的 subcommand 创建一个 service.
  serviceaccount      创建一个指定名称的 service account

有如下选项：

Options:
      --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.
      --dry-run='none': Must be "none", "server", or "client". If client strategy, only print the object that would be
sent, without sending it. If server strategy, submit server-side request without persisting the resource.
      --edit=false: Edit the API resource before creating
      --field-manager='kubectl-create': Name of the manager used to track field ownership.
  -f, --filename=[]: Filename, directory, or URL to files to use to create the resource
  -k, --kustomize='': Process the kustomization directory. This flag can't be used together with -f or -R.
  -o, --output='': Output format. One of:
json|yaml|name|go-template|go-template-file|template|templatefile|jsonpath|jsonpath-as-json|jsonpath-file.
      --raw='': Raw URI to POST to the server.  Uses the transport specified by the kubeconfig 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.
  -R, --recursive=false: Process the directory used in -f, --filename recursively. Useful when you want to manage
related manifests organized within the same directory.
      --save-config=false: If true, the configuration of current object will be saved in its annotation. Otherwise, the
annotation will be unchanged. This flag is useful when you want to perform kubectl apply on this object in the future.
  -l, --selector='': Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)
      --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].
      --validate=true: If true, use a schema to validate the input before sending it
      --windows-line-endings=false: Only relevant if --edit=true. Defaults to the line ending native to your platform.

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