The highest tagged major version is
README
¶
Helm源码分析
Source Code From https://github.com/helm/helm/archive/refs/tags/v2.17.0.tar.gz
参考云原生应用管理原理与实践（陈显鹭 阚俊宝 匡大虎 卢稼奇 著）
目录
Helm Install Client
cmd/helm/install.go:172
1.提前使用kubectl port-forward功能打通宿主机与远程Tiller Pod的通信。
2.checkArgsLength检查用户输入参数的合法性。
3.对于远程地址，locateChartPath下载Chart到本地指定目录；对于本地地址，则直接加载。
4.installCmd.run将用户命令行输入参数覆盖values.yaml信息，下载依赖的Chart，将Chart信息加载到内存中变成结构体信息。
5.向Tiller发送install命令，将含有Chart所有信息的结构体发送出去。
6.打印Tiller返回的Release信息。
7.向Tiller发送获取Release Status信息并且打印出来。
locateChartPath
cmd/helm/install.go:491
pkg/repo/chartrepo.go:206
ensureHelmClient
cmd/helm/helm.go:421, 430
InstallCmd Run
cmd/helm/install.go:242
1.处理helm install命令行临时覆盖的参数
2.处理外部介入的template
3.检查指定的Release名称是否符合DNS命名规范
4.加载Chart文件并且初始化为Chart对象
5.加载requirements.yaml文件内声明的依赖Chart
installReleaseFromChart
pkg/helm/client.go:112
setupConnection
cmd/helm/install.go:177
cmd/helm/helm.go:341
Helm Client install Function
pkg/helm/client.go:422,361
pkg/proto/hapi/services/tiller.pb.go:1566
返回Release状态
cmd/helm/install.go:357
Helm Install Server
pkg/tiller/release_install.go:34
prepareRelease
pkg/tiller/release_install.go:61
1.首先检查当前Release名称是否是集群唯一，这是Release唯一性的标志，如果没有指定Release名称，那么就创建一个全集群唯一的名称。
2.检查客户端、服务端、Kubernetes Api Server的版本兼容性。
3.初始化ReleaseOptions结构体，填入名称、版本号、命名空间等信息。
4.ToRenderValuesCaps将手动传递的参数和默认已经存在的values渲染到一起。
5.renderResources将上一步构建的信息和Kubernetes Api Ssever等信息合并在一起，同时分离出安装Chart Yaml信息和hooks等。
6.拼接出Release对象，真正开始进入安装步骤。
performRelease
pkg/tiller/release_install.go:158
pkg/tiller/release_server.go:433,423
pkg/tiller/release_modules.go:53
1.将Hooks按照权重的顺序依次排序，优先级从高到低，一般需要先安装pre-istall
2.deleteHookByPolicy丽数将需要在安装前删除的资源优先删除。
3.将剩余需要创建的资源，尤其是CRD资源提交给集群创建。
4.提交后一直等待资源创建完毕，默认超时时间为1min。
5.全部Hooks资源创建完毕后，代表该Chart Hooks准备完毕。
6.将Release信息记录到Kubernetes集群中，目前Helm默认的方式是记录到kube-system下的configmap中。configmap的名称就是Release的名字，后面的点对应着它的版本号。比如v1就是第一次安装的版本，后面的labels也能表明些身份，比如OWNER=TILLER，代表它是Tiller创建的。
7.基本信息记录完毕后，将剩余Chart谊染后的资源文件提交给Kubernetes ApiServer。
Helm Update
update命令的定义
cmd\helm\upgrade.go:131
1.首先创建与Tiller的联通通道。
2.检查传入参数的合法性。
3.下载对应的Chart包。
4.将对应的传入setting值构建成一个Release结构体。
5.调用 Tiller update接口。
6.检查Release状态。
Update服务端的实现
pkg\tiller\release_update.go:34,276
Helm Ls
Client端实现
cmd\helm\list.go:149
pkg\helm\client.go:390
Server端实现
pkg\tiller\release_list.go:30
pkg\storage\driver\cfgmaps.go:90
Helm Rollback
pkg\tiller\release_rollback.go:64
pkg\tiller\release_rollback.go:123
1.检查传递的Release名称是否符合规则。
2.根据传递的需要，回滚版本号来确定目标版本。
3.根据版本号去configmap中读取对应的版本号信息。
4.将读取到的版本号信息格式化成对应的Release结构体。
5.拼装成结构体后返回。
Helm Delete
pkg\tiller\release_uninstall.go:33
1.检查传递的名称是否符合规范。
2.根据Release的名称查询其所有的历史记录。
3.将Release的状态置为删除中。
4.执行Release中声明的Hooks。
5.删除Release中的所有资源。
6.如果指定了强制删除，那么也会把Release信息一并删除掉，这里指的就是configmap。
Directories
¶
| Path | Synopsis |
|---|---|
|
cmd
|
|
|
helm/search
Package search provides client-side repository searching.
|
Package search provides client-side repository searching. |
|
internal
|
|
|
pkg
|
|
|
chartutil
Package chartutil contains tools for working with charts.
|
Package chartutil contains tools for working with charts. |
|
downloader
Package downloader provides a library for downloading charts.
|
Package downloader provides a library for downloading charts. |
|
engine
Package engine implements the Go template engine as a Tiller Engine.
|
Package engine implements the Go template engine as a Tiller Engine. |
|
getter
Package getter provides a generalize tool for fetching data by scheme.
|
Package getter provides a generalize tool for fetching data by scheme. |
|
helm/environment
Package environment describes the operating environment for Tiller.
|
Package environment describes the operating environment for Tiller. |
|
ignore
Package ignore provides tools for writing ignore files (a la .gitignore).
|
Package ignore provides tools for writing ignore files (a la .gitignore). |
|
lint/support
Package support contains tools for linting charts.
|
Package support contains tools for linting charts. |
|
manifest
Package manifest contains tools for working with kubernetes manifests.
|
Package manifest contains tools for working with kubernetes manifests. |
|
plugin/cache
Package cache provides a key generator for vcs urls.
|
Package cache provides a key generator for vcs urls. |
|
plugin/installer
Package installer provides an interface for installing Helm plugins.
|
Package installer provides an interface for installing Helm plugins. |
|
provenance
Package provenance provides tools for establishing the authenticity of a chart.
|
Package provenance provides tools for establishing the authenticity of a chart. |
|
renderutil
Package renderutil contains tools related to the local rendering of charts.
|
Package renderutil contains tools related to the local rendering of charts. |
|
repo
Package repo implements the Helm Chart Repository.
|
Package repo implements the Helm Chart Repository. |
|
repo/repotest
Package repotest provides utilities for testing.
|
Package repotest provides utilities for testing. |
|
strvals
Package strvals provides tools for working with strval lines.
|
Package strvals provides tools for working with strval lines. |
|
tiller/environment
Package environment describes the operating environment for Tiller.
|
Package environment describes the operating environment for Tiller. |
|
timeconv
Package timeconv contains utilities for converting time.
|
Package timeconv contains utilities for converting time. |
|
version
Package version represents the current version of the project.
|
Package version represents the current version of the project. |