1. 安装helm
curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
2. 基本概念
Helm是用来管理k8s集群上的软件包。
Chart:代表helm软件包Repository：软件包的存放仓库Release:运行在k8s上的一个发布实例。
3. helm命令
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
push push a chart to remote
registry login to or logout from a registry
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
4. 常用命令
4.1. helm search
- helm search hub：从 Artifact Hub 中查找并列出 helm charts。支持模糊匹配。
helm search hub wordpress
- helm search repo：基于指定仓库进行搜索。
helm repo add brigade https://brigadecore.github.io/charts
helm search repo brigade
# 列出所有版本
helm search repo apisix -l
4.2. helm install/uninstall
helm install <release_name> <chart_name>
# 示例
helm install happy-panda bitnami/wordpress -
# uninstall
helm uninstall RELEASE_NAME
安装自定义chart
helm install -f values.yaml bitnami/wordpress --generate-name
# 本地 chart 压缩包
helm install foo foo-0.1.1.tgz
# 解压后的 chart 目录
helm install foo path/to/foo
# 完整的 URL
helm install foo https://example.com/charts/foo-1.2.3.tgz
4.3. helm upgrade
helm upgrade happy-panda bitnami/wordpress
4.4. helm rollback
helm rollback <RELEASE> [REVISION] [flags]
4.5. helm repo
helm repo add dev https://example.com/dev-charts
helm repo list
helm repo remove
4.6. helm pull
从仓库下载并（可选）在本地目录解压。
helm pull [chart URL | repo/chartname]
helm pull [chart URL | repo/chartname] --version
5. 创建chart
5.1. 初始化chart
helm create mychart
查看生成的文件目录：
mychart
|-- charts # 目录用于存放所依赖的子chart
|-- Chart.yaml # 描述这个 Chart 的相关信息、包括名字、描述信息、版本等
|-- templates
| |-- deployment.yaml
| |-- _helpers.tpl # 模板助手文件，定义的值可在模板中使用
| |-- hpa.yaml
| |-- ingress.yaml
| |-- NOTES.txt # Chart 部署到集群后的一些信息，例如：如何使用、列出缺省值
| |-- serviceaccount.yaml
| |-- service.yaml
| `-- tests
| `-- test-connection.yaml
`-- values.yaml # 模板的值文件，这些值会在安装时应用到 GO 模板生成部署文件
移除默认模板文件，并添加自己的模板文件。
rm -rf mysubchart/templates/*
5.2. 调试模板
helm lint是验证chart是否遵循最佳实践的首选工具。helm template --debug在本地测试渲染chart模板。helm install --dry-run --debug：我们已经看到过这个技巧了，这是让服务器渲染模板的好方法，然后返回生成的清单文件。helm get manifest: 这是查看安装在服务器上的模板的好方法。
参考：