第 3 篇 Helm 命令、环境变量、相关目录

• 介绍 Helm 命令及选项
• 介绍 Helm 相关环境变量
• 介绍 Helm 相关目录

Helm 命令

直接输入 helm help即可查看 helm 命令 的详细使用信息。

The Kubernetes package manager

Common actions for Helm:

- helm search:    search for charts
- helm pull:      download a chart to your local directory to view
- helm install:   upload the chart to Kubernetes
- helm list:      list releases of charts

Environment variables:

| Name                               | Description                                                                       |
|------------------------------------|-----------------------------------------------------------------------------------|
| $HELM_CACHE_HOME                   | set an alternative location for storing cached files.                             |
| $HELM_CONFIG_HOME                  | set an alternative location for storing Helm configuration.                       |
| $HELM_DATA_HOME                    | set an alternative location for storing Helm data.                                |
| $HELM_DEBUG                        | indicate whether or not Helm is running in Debug mode                             |
| $HELM_DRIVER                       | set the backend storage driver. Values are: configmap, secret, memory, postgres   |
| $HELM_DRIVER_SQL_CONNECTION_STRING | set the connection string the SQL storage driver should use.                      |
| $HELM_MAX_HISTORY                  | set the maximum number of helm release history.                                   |
| $HELM_NAMESPACE                    | set the namespace used for the helm operations.                                   |
| $HELM_NO_PLUGINS                   | disable plugins. Set HELM_NO_PLUGINS=1 to disable plugins.                        |
| $HELM_PLUGINS                      | set the path to the plugins directory                                             |
| $HELM_REGISTRY_CONFIG              | set the path to the registry config file.                                         |
| $HELM_REPOSITORY_CACHE             | set the path to the repository cache directory                                    |
| $HELM_REPOSITORY_CONFIG            | set the path to the repositories file.                                            |
| $KUBECONFIG                        | set an alternative Kubernetes configuration file (default "~/.kube/config")       |
| $HELM_KUBEAPISERVER                | set the Kubernetes API Server Endpoint for authentication                         |
| $HELM_KUBECAFILE                   | set the Kubernetes certificate authority file.                                    |
| $HELM_KUBEASGROUPS                 | set the Groups to use for impersonation using a comma-separated list.             |
| $HELM_KUBEASUSER                   | set the Username to impersonate for the operation.                                |
| $HELM_KUBECONTEXT                  | set the name of the kubeconfig context.                                           |
| $HELM_KUBETOKEN                    | set the Bearer KubeToken used for authentication.                                 |

Helm stores cache, configuration, and data based on the following configuration order:

- If a HELM_*_HOME environment variable is set, it will be used
- Otherwise, on systems supporting the XDG base directory specification, the XDG variables will be used
- When no other location is set a default location will be used based on the operating system

By default, the default directories depend on the Operating System. The defaults are listed below:

| Operating System | Cache Path                | Configuration Path             | Data Path               |
|------------------|---------------------------|--------------------------------|-------------------------|
| Linux            | $HOME/.cache/helm         | $HOME/.config/helm             | $HOME/.local/share/helm |
| macOS            | $HOME/Library/Caches/helm | $HOME/Library/Preferences/helm | $HOME/Library/helm      |
| Windows          | %TEMP%\helm               | %APPDATA%\helm                 | %APPDATA%\helm          |

Usage:
  helm [command]

Available Commands:
  completion  generate autocompletion scripts for the specified shell
  create      create a new chart with the given name
  dependency  manage a chart's dependencies
  env         helm client environment information
  get         download extended information of a named release
  help        Help about any command
  history     fetch release history
  install     install a chart
  lint        examine a chart for possible issues
  list        list releases
  package     package a chart directory into a chart archive
  plugin      install, list, or uninstall Helm plugins
  pull        download a chart from a repository and (optionally) unpack it in local directory
  repo        add, list, remove, update, and index chart repositories
  rollback    roll back a release to a previous revision
  search      search for a keyword in charts
  show        show information of a chart
  status      display the status of the named release
  template    locally render templates
  test        run tests for a release
  uninstall   uninstall a release
  upgrade     upgrade a release
  verify      verify that a chart at the given path has been signed and is valid
  version     print the client version information

Flags:
      --debug                       enable verbose output
  -h, --help                        help for helm
      --kube-apiserver string       the address and the port for the Kubernetes API server
      --kube-as-group stringArray   group to impersonate for the operation, this flag can be repeated to specify multiple groups.
      --kube-as-user string         username to impersonate for the operation
      --kube-ca-file string         the certificate authority file for the Kubernetes API server connection
      --kube-context string         name of the kubeconfig context to use
      --kube-token string           bearer token used for authentication
      --kubeconfig string           path to the kubeconfig file
  -n, --namespace string            namespace scope for this request
      --registry-config string      path to the registry config file (default "/root/.config/helm/registry.json")
      --repository-cache string     path to the file containing cached repository indexes (default "/root/.cache/helm/repository")
      --repository-config string    path to the file containing repository names and URLs (default "/root/.config/helm/repositories.yaml")

Use "helm [command] --help" for more information about a command.

语法：helm [command]

还有一些 Flag 参数：

    --debug                       enable verbose output
-h, --help                        help for helm
    --kube-apiserver string       the address and the port for the Kubernetes API server
    --kube-as-group stringArray   group to impersonate for the operation, this flag can be repeated to specify multiple groups.
    --kube-as-user string         username to impersonate for the operation
    --kube-ca-file string         the certificate authority file for the Kubernetes API server connection
    --kube-context string         name of the kubeconfig context to use
    --kube-token string           bearer token used for authentication
    --kubeconfig string           path to the kubeconfig file
-n, --namespace string            namespace scope for this request
    --registry-config string      path to the registry config file (default "/root/.config/helm/registry.json")
    --repository-cache string     path to the file containing cached repository indexes (default "/root/.cache/helm/repository")
    --repository-config string    path to the file containing repository names and URLs (default "/root/.config/helm/repositories.yaml")

Helm 环境变量

helm 使用的环境变量如下：

Helm 相关目录

helm 缓存、配置和数据 放在哪里？基于如下配置顺序：

• 如果设置了 HELM_*_HOME，则使用这个。比如 HELM_CACHE_HOME、HELM_CONFIG_HOME、HELM_DATA_HOME。
• 否则，在支持 XDG 基本目录规范的系统上，将使用 XDG 变量
• 最后，使用基于操作系统的默认位置。具体如下表所示：

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3.第 3 篇 Helm 命令、环境变量、相关目录
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