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# Operator SDK | ||
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[Operator SDK](https://github.com/operator-framework/operator-sdk) 由 CoreOS 开源,它是用于构建 Kubernetes 原生应用的 SDK,它提供更高级别的 API、抽象和项目脚手架。在阅读本文前请先确认您已经了解 [Operator](operator.md)是什么。 | ||
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使用 Kubernetes 中原生的对象来部署和管理复杂的应用程序不是那么容易,尤其是要管理整个应用的生命周期、组件的扩缩容,我们之前通常是编写各种脚本,通过调用 Kubernetes 的命令行工具来管理 Kubernetes 上的应用。现在可以通过 CRD(CustomResourceDefinition)来自定义这些复杂操作,通过将运维的知识封装在自定义 API 里来减轻运维人员的负担。同时我们还可以像操作 Kubernetes 的原生资源对象一样,使用 `kubectl` 来操作 CRD。 | ||
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下面我们将安装和试用一下 Operator SDK。 | ||
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## 安装 Operator SDK | ||
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```bash | ||
$ mkdir -p $GOPATH/src/github.com/operator-framework | ||
$ cd $GOPATH/src/github.com/operator-framework/operator-sdk | ||
$ dep ensure | ||
Create kubernetes-operator-sdk-tutorial/cmd/kubernetes-operator-sdk-tutorial/main.go | ||
Create kubernetes-operator-sdk-tutorial/config/config.yaml | ||
Create kubernetes-operator-sdk-tutorial/deploy/rbac.yaml | ||
Create kubernetes-operator-sdk-tutorial/deploy/cr.yaml | ||
Create kubernetes-operator-sdk-tutorial/pkg/apis/jimmysong/v1alpha1/doc.go | ||
Create kubernetes-operator-sdk-tutorial/pkg/apis/jimmysong/v1alpha1/register.go | ||
Create kubernetes-operator-sdk-tutorial/pkg/apis/jimmysong/v1alpha1/types.go | ||
Create kubernetes-operator-sdk-tutorial/pkg/stub/handler.go | ||
Create kubernetes-operator-sdk-tutorial/tmp/build/build.sh | ||
Create kubernetes-operator-sdk-tutorial/tmp/build/docker_build.sh | ||
Create kubernetes-operator-sdk-tutorial/tmp/build/Dockerfile | ||
Create kubernetes-operator-sdk-tutorial/tmp/codegen/boilerplate.go.txt | ||
Create kubernetes-operator-sdk-tutorial/tmp/codegen/update-generated.sh | ||
Create kubernetes-operator-sdk-tutorial/Gopkg.toml | ||
Create kubernetes-operator-sdk-tutorial/Gopkg.lock | ||
Run dep ensure ... | ||
Root project is "github.com/rootsongjc/kubernetes-operator-sdk-tutorial" | ||
3 transitively valid internal packages | ||
12 external packages imported from 4 projects | ||
(0) ✓ select (root) | ||
(1) ? attempt k8s.io/api with 1 pkgs; at least 1 versions to try | ||
(1) try k8s.io/[email protected] | ||
(1) ✓ select k8s.io/[email protected] w/1 pkgs | ||
(2) ? attempt k8s.io/apimachinery with 4 pkgs; at least 1 versions to try | ||
(2) try k8s.io/[email protected] | ||
(2) ✓ select k8s.io/[email protected] w/22 pkgs | ||
... | ||
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$ go install github.com/operator-framework/operator-sdk/commands/operator-sdk | ||
``` | ||
该过程需要几分钟,请耐心等待。确认 `$GOPATH/bin/operator-sdk` 文件位于您的 `$PATH` 目录下。 | ||
## 创建项目 | ||
```bash | ||
$ cd $GOPATH/src/github.com/<your-github-repo>/ | ||
$ operator-sdk new <operator-project-name> --api-version=<your-api-group>/<version> --kind=<custom-resource-kind> | ||
$ cd <operator-project-name> | ||
``` | ||
- operator-project-name:创建的项目的名称 | ||
- your-api-group:Kubernetes 自定义 API 的组名,一般用域名如 `jimmysong.io` | ||
- version:Kubernetes 自定义资源的 API 版本 | ||
- custom-resource-kind:CRD 的名称 | ||
```bash | ||
operator-sdk new kubernetes-operator-sdk-tutorial --api-version=jimmysong.io/v1alpha1 --kind=operator-sdk | ||
``` | ||
## 参考 | ||
- [A complete guide to Kubernetes Operator SDK](https://banzaicloud.com/blog/operator-sdk/) |