编写 Operator 的方案 —— 2、基于 sample-controller
https://github.com/kubernetes/sample-controller
首先我们将基于 k8s.io/sample-controller 来实现 cnat,通过直接使用 client-go 完成。
sample-controller 使用 k8s.io/code-generator 来生成强类型的客户端、Informer、Lister 和深拷贝函数。如果你的自定义控制器中的 API 发生了变化,比如在自定义资源中添加了一个新的字段,你需要运行 update-codegen.sh 脚本来重新生成先前提到过的源代码文件。
我们开始基于 sample-controller 使用 client-go 来实现我们的 cnat Operator 吧。
1、首先,运行 go get k8s.io/sample-controller 获取相关的源代码及依赖并安装到系统中。
[root@JumperServer:zuoyang] # mkdir -pv sample-controller mkdir: created directory 'sample-controller' [root@JumperServer:zuoyang] # cd sample-controller/ [root@JumperServer:sample-controller] # ll total 0 [root@JumperServer:sample-controller] # go mod init sample-controller go: creating new go.mod: module sample-controller [root@JumperServer:sample-controller] # ll total 4 -rw-r--r-- 1 root root 36 Aug 21 17:38 go.mod [root@JumperServer:sample-controller] # go get k8s.io/sample-controller go: added github.com/davecgh/go-spew v1.1.1 go: added github.com/emicklei/go-restful/v3 v3.9.0 go: added github.com/go-logr/logr v1.2.4 go: added github.com/go-openapi/jsonpointer v0.19.6 go: added github.com/go-openapi/jsonreference v0.20.2 go: added github.com/go-openapi/swag v0.22.3 go: added github.com/gogo/protobuf v1.3.2 go: added github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da go: added github.com/golang/protobuf v1.5.3 go: added github.com/google/gnostic-models v0.6.8 go: added github.com/google/go-cmp v0.5.9 go: added github.com/google/gofuzz v1.2.0 go: added github.com/google/uuid v1.3.0 go: added github.com/imdario/mergo v0.3.6 go: added github.com/josharian/intern v1.0.0 go: added github.com/json-iterator/go v1.1.12 go: added github.com/mailru/easyjson v0.7.7 go: added github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd go: added github.com/modern-go/reflect2 v1.0.2 go: added github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 go: added github.com/spf13/pflag v1.0.5 go: added golang.org/x/net v0.13.0 go: added golang.org/x/oauth2 v0.8.0 go: added golang.org/x/sys v0.10.0 go: added golang.org/x/term v0.10.0 go: added golang.org/x/text v0.11.0 go: added golang.org/x/time v0.3.0 go: added google.golang.org/appengine v1.6.7 go: added google.golang.org/protobuf v1.30.0 go: added gopkg.in/inf.v0 v0.9.1 go: added gopkg.in/yaml.v2 v2.4.0 go: added gopkg.in/yaml.v3 v3.0.1 go: added k8s.io/api v0.28.0 go: added k8s.io/apimachinery v0.28.0 go: added k8s.io/client-go v0.28.0 go: added k8s.io/klog/v2 v2.100.1 go: added k8s.io/kube-openapi v0.0.0-20230717233707-2695361300d9 go: added k8s.io/sample-controller v0.28.0 go: added k8s.io/utils v0.0.0-20230406110748-d93618cff8a2 go: added sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd go: added sigs.k8s.io/structured-merge-diff/v4 v4.2.3 go: added sigs.k8s.io/yaml v1.3.0 [root@JumperServer:sample-controller] #
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