Kubectl 备忘录

# Centos 或者 RedHat 需要安装 bash-completion 包命令
$ yum install -y bash-completion

# Ubuntu 或者 Debian 需要安装 bash-completion 包命令
$ apt install -y bash-completion

# 写入当前用户 .bashrc 文件中
$ echo "source /usr/share/bash-completion/bash_completion" >> ~/.bashrc
$ echo "source <(kubectl completion bash)" >> ~/.bashrc

# 让当前终端生效
$ source ~/.bashrc

# 写入当前用户 .zshrc 文件中
$ echo "if [ $commands[kubectl] ]; then source <(kubectl completion zsh); fi" >> ~/.zshrc

# 让当前终端生效
$ source ~/.zshrc

apiVersion: v1
kind: Config
preferences: {}
 
clusters: # 集群参数
- cluster:
  name: {cluster-name}
 
users: # 用户参数
- name: {user-name}
 
contexts: # 上下文参数
- context:
    cluster: {cluster-name}
    user: {user-name}
  name: kubernetes # 集群上下文名称
current-context: kubernetes # 当前上下文

$ ls -lsh setup

0namespace-namespace.yaml
prometheus-operator-0alertmanagerCustomResourceDefinition.yaml
prometheus-operator-0podmonitorCustomResourceDefinition.yaml
prometheus-operator-0prometheusCustomResourceDefinition.yaml
prometheus-operator-0prometheusruleCustomResourceDefinition.yaml
prometheus-operator-0servicemonitorCustomResourceDefinition.yaml
prometheus-operator-0thanosrulerCustomResourceDefinition.yaml
prometheus-operator-clusterRole.yaml
prometheus-operator-clusterRoleBinding.yaml
prometheus-operator-deployment.yaml
prometheus-operator-service.yaml
prometheus-operator-serviceAccount.yaml

# 查询k8s支持的 api 版本
$ kubectl api-versions

# 查询k8s支持的 resources 类型
$ kubectl api-resources

# resources 类型详细操作
$ kubectl api-resources --namespaced=true      # 所有命名空间作用域的资源
$ kubectl api-resources --namespaced=false     # 所有非命名空间作用域的资源
$ kubectl api-resources -o name                # 用简单格式列举所有资源（仅显示资源名称）
$ kubectl api-resources -o wide                # 用扩展格式列举所有资源（又称 "wide" 格式）
$ kubectl api-resources --verbs=list,get       # 支持 "list" 和 "get" 请求动词的所有资源
$ kubectl api-resources --api-group=extensions # "extensions" API 组中的所有资源

# 查询 kubernetes metrics 信息
$ kubectl get --raw "/apis/metrics.k8s.io/v1beta1" | jq

{
  "kind": "APIResourceList",
  "apiVersion": "v1",
  "groupVersion": "metrics.k8s.io/v1beta1",
  "resources": [
    {
      "name": "nodes",
      "singularName": "",
      "namespaced": false,
      "kind": "NodeMetrics",
      "verbs": [
        "get",
        "list"
      ]
    },
    {
      "name": "pods",
      "singularName": "",
      "namespaced": true,
      "kind": "PodMetrics",
      "verbs": [
        "get",
        "list"
      ]
    }
  ]
}