Operator基础：3: 使用Operator SDK创建Operator

分手后的思念是犯贱 2022-12-23 09:47 561阅读 0赞

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在上篇文章中介绍了Operator SDK的安装和设定过程，这篇文章继续使用官方的示例来介绍一下如何使用Operator SDK进行Operator的创建和构建等过程。

### 目录 ###

*  事前准备
 *  步骤1: init操作
 *  步骤2: 创建API
 *  步骤3: 构建镜像
 *  步骤4: 运行Operator
 *  步骤5: 创建自定义资源
 *  步骤6: 删除CR和相关资源
 *  总结
 *  参考内容

# 事前准备 #

liumiaocn:~ liumiao$ which operator-sdk
    /usr/local/bin/operator-sdk
    liumiaocn:~ liumiao$ operator-sdk version
    operator-sdk version: "v1.2.0", commit: "215fc50b2d4acc7d92b36828f42d7d1ae212015c", kubernetes version: "v1.18.8", go version: "go1.15.3", GOOS: "darwin", GOARCH: "amd64"
    liumiaocn:~ liumiao$ go version
    go version go1.15.5 darwin/amd64
    liumiaocn:~ liumiao$

# 步骤1: init操作 #

> 执行命令：operator-sdk init --domain=example.com --repo=github.com/example-inc/memcached-operator

liumiaocn:~ liumiao$ mkdir memcached-operator
    liumiaocn:~ liumiao$ cd memcached-operator/
    liumiaocn:memcached-operator liumiao$ operator-sdk init --domain=example.com --repo=github.com/example-inc/memcached-operator
    Writing scaffold for you to edit...
    Get controller runtime:
    $ go get sigs.k8s.io/controller-runtime@v0.6.3
    go: downloading sigs.k8s.io/controller-runtime v0.6.3
    ...省略
    go: downloading google.golang.org/appengine v1.5.0
    Update go.mod:
    $ go mod tidy
    go: downloading go.uber.org/zap v1.10.0
    ...省略
    go: downloading github.com/kr/text v0.1.0
    Running make:
    $ make
    go: creating new go.mod: module tmp
    ...省略
    /Users/liumiao/go/bin/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
    go fmt ./...
    go vet ./...
    go build -o bin/manager main.go
    Next: define a resource with:
    $ operator-sdk create api
    liumiaocn:memcached-operator liumiao$

执行完毕，整体目录结构如下所示

liumiaocn:memcached-operator liumiao$ ls
    Dockerfile	PROJECT		config		go.sum		main.go
    Makefile	bin		go.mod		hack
    liumiaocn:memcached-operator liumiao$ tree .
    .
    ├── Dockerfile
    ├── Makefile
    ├── PROJECT
    ├── bin
    │   └── manager
    ├── config
    │   ├── certmanager
    │   │   ├── certificate.yaml
    │   │   ├── kustomization.yaml
    │   │   └── kustomizeconfig.yaml
    │   ├── default
    │   │   ├── kustomization.yaml
    │   │   ├── manager_auth_proxy_patch.yaml
    │   │   ├── manager_webhook_patch.yaml
    │   │   └── webhookcainjection_patch.yaml
    │   ├── manager
    │   │   ├── kustomization.yaml
    │   │   └── manager.yaml
    │   ├── prometheus
    │   │   ├── kustomization.yaml
    │   │   └── monitor.yaml
    │   ├── rbac
    │   │   ├── auth_proxy_client_clusterrole.yaml
    │   │   ├── auth_proxy_role.yaml
    │   │   ├── auth_proxy_role_binding.yaml
    │   │   ├── auth_proxy_service.yaml
    │   │   ├── kustomization.yaml
    │   │   ├── leader_election_role.yaml
    │   │   ├── leader_election_role_binding.yaml
    │   │   └── role_binding.yaml
    │   ├── scorecard
    │   │   ├── bases
    │   │   │   └── config.yaml
    │   │   ├── kustomization.yaml
    │   │   └── patches
    │   │       ├── basic.config.yaml
    │   │       └── olm.config.yaml
    │   └── webhook
    │       ├── kustomization.yaml
    │       ├── kustomizeconfig.yaml
    │       └── service.yaml
    ├── go.mod
    ├── go.sum
    ├── hack
    │   └── boilerplate.go.txt
    └── main.go
    
    12 directories, 34 files
    liumiaocn:memcached-operator liumiao$

# 步骤2: 创建API #

> 执行命令：operator-sdk create api --group cache --version v1 --kind Memcached --resource=true --controller=true

liumiaocn:memcached-operator liumiao$ operator-sdk create api --group cache --version v1 --kind Memcached --resource=true --controller=true
    Writing scaffold for you to edit...
    api/v1/memcached_types.go
    controllers/memcached_controller.go
    Running make:
    $ make
    go: creating new go.mod: module tmp
    go: found sigs.k8s.io/controller-tools/cmd/controller-gen in sigs.k8s.io/controller-tools v0.3.0
    /Users/liumiao/go/bin/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
    go fmt ./...
    go vet ./...
    go build -o bin/manager main.go
    liumiaocn:memcached-operator liumiao$

# 步骤3: 构建镜像 #

> 执行命令：make docker-build IMG=liumiaocn/memcache:v1

liumiaocn:memcached-operator liumiao$ make docker-build IMG=liumiaocn/memcache:v1
    go: creating new go.mod: module tmp
    go: found sigs.k8s.io/controller-tools/cmd/controller-gen in sigs.k8s.io/controller-tools v0.3.0
    /Users/liumiao/go/bin/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
    go fmt ./...
    go vet ./...
    /Users/liumiao/go/bin/controller-gen "crd:trivialVersions=true" rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
    mkdir -p /Users/liumiao/memcached-operator/testbin
    test -f /Users/liumiao/memcached-operator/testbin/setup-envtest.sh || curl -sSLo /Users/liumiao/memcached-operator/testbin/setup-envtest.sh https://raw.githubusercontent.com/kubernetes-sigs/controller-runtime/v0.6.3/hack/setup-envtest.sh
    source /Users/liumiao/memcached-operator/testbin/setup-envtest.sh; fetch_envtest_tools /Users/liumiao/memcached-operator/testbin; setup_envtest_env /Users/liumiao/memcached-operator/testbin; go test ./... -coverprofile cover.out
    fetching envtest tools@1.16.4 (into '/Users/liumiao/memcached-operator/testbin')
    x bin/
    x bin/etcd
    x bin/kubectl
    x bin/kube-apiserver
    setting up env vars
    ?   	github.com/example-inc/memcached-operator	[no test files]
    ?   	github.com/example-inc/memcached-operator/api/v1	[no test files]
    ok  	github.com/example-inc/memcached-operator/controllers	6.020s	coverage: 0.0% of statements
    docker build . -t liumiaocn/memcache:v1
    Sending build context to Docker daemon  323.3MB
    Step 1/14 : FROM golang:1.13 as builder
    1.13: Pulling from library/golang
    d6ff36c9ec48: Pull complete 
    c958d65b3090: Pull complete 
    edaf0a6b092f: Pull complete 
    80931cf68816: Pull complete 
    813643441356: Pull complete 
    799f41bb59c9: Pull complete 
    16b5038bccc8: Pull complete 
    Digest: sha256:8ebb6d5a48deef738381b56b1d4cd33d99a5d608e0d03c5fe8dfa3f68d41a1f8
    Status: Downloaded newer image for golang:1.13
     ---> d6f3656320fe
    Step 2/14 : WORKDIR /workspace
     ---> Running in eb0a5f21e3fe
    Removing intermediate container eb0a5f21e3fe
     ---> dbb6e3e63541
    Step 3/14 : COPY go.mod go.mod
     ---> 4ab6a945e245
    Step 4/14 : COPY go.sum go.sum
     ---> 293a4eec3dbb
    Step 5/14 : RUN go mod download
     ---> Running in d057c3fac1d5
    go: finding cloud.google.com/go v0.38.0
    go: finding github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78
    ...省略
    go: finding sigs.k8s.io/yaml v1.2.0
    Removing intermediate container d057c3fac1d5
     ---> e83e6409c8f6
    Step 6/14 : COPY main.go main.go
     ---> 72236a1f1ba2
    Step 7/14 : COPY api/ api/
     ---> 2e8254e6e37e
    Step 8/14 : COPY controllers/ controllers/
     ---> 879e2f79eab2
    Step 9/14 : RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager main.go
     ---> Running in ca5c33fa8fb0
    Removing intermediate container ca5c33fa8fb0
     ---> ab3a3a66312d
    Step 10/14 : FROM gcr.io/distroless/static:nonroot
    nonroot: Pulling from distroless/static
    e59bd8947ac7: Already exists 
    Digest: sha256:dfabf95aa48990eec883b8b75462b1304678ebe9f36bdbca7841f5ddbd32af96
    Status: Downloaded newer image for gcr.io/distroless/static:nonroot
     ---> aa99000bc55d
    Step 11/14 : WORKDIR /
     ---> Running in 3913d069fe17
    Removing intermediate container 3913d069fe17
     ---> 3241720e1ab6
    Step 12/14 : COPY --from=builder /workspace/manager .
     ---> 4e2497bbc978
    Step 13/14 : USER nonroot:nonroot
     ---> Running in d55a63335b21
    Removing intermediate container d55a63335b21
     ---> 740854feb14e
    Step 14/14 : ENTRYPOINT ["/manager"]
     ---> Running in 5271112557de
    Removing intermediate container 5271112557de
     ---> 46e4c9af60d8
    Successfully built 46e4c9af60d8
    Successfully tagged liumiaocn/memcache:v1
    liumiaocn:memcached-operator liumiao$

注：如果事前docker login设定完毕，可以直接执行make docker-build docker-push推送至镜像仓库中。

构建之后相关镜像信息如下所示：

liumiaocn:memcached-operator liumiao$ docker images |grep memcache
    liumiaocn/memcache                                                   v1                                               46e4c9af60d8        6 minutes ago       46.5MB
    liumiaocn:memcached-operator liumiao$

# 步骤4: 运行Operator #

使用如下命令运行刚刚创建的Operator

> 执行命令：make install && make deploy IMG=liumiaocn/memcache:v1

liumiaocn:memcached-operator liumiao$ make install && make deploy IMG=liumiaocn/memcache:v1
    go: creating new go.mod: module tmp
    go: found sigs.k8s.io/controller-tools/cmd/controller-gen in sigs.k8s.io/controller-tools v0.3.0
    /Users/liumiao/go/bin/controller-gen "crd:trivialVersions=true" rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
    go: creating new go.mod: module tmp
    go: downloading sigs.k8s.io/kustomize/kustomize/v3 v3.5.4
    ...省略
    go: downloading github.com/konsorten/go-windows-terminal-sequences v1.0.1
    /Users/liumiao/go/bin/kustomize build config/crd | kubectl apply -f -
    customresourcedefinition.apiextensions.k8s.io/memcacheds.cache.example.com created
    go: creating new go.mod: module tmp
    go: found sigs.k8s.io/controller-tools/cmd/controller-gen in sigs.k8s.io/controller-tools v0.3.0
    /Users/liumiao/go/bin/controller-gen "crd:trivialVersions=true" rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
    go: creating new go.mod: module tmp
    cd config/manager && /Users/liumiao/go/bin/kustomize edit set image controller=liumiaocn/memcache:v1
    /Users/liumiao/go/bin/kustomize build config/default | kubectl apply -f -
    namespace/memcached-operator-system created
    customresourcedefinition.apiextensions.k8s.io/memcacheds.cache.example.com configured
    role.rbac.authorization.k8s.io/memcached-operator-leader-election-role created
    clusterrole.rbac.authorization.k8s.io/memcached-operator-manager-role created
    clusterrole.rbac.authorization.k8s.io/memcached-operator-metrics-reader created
    clusterrole.rbac.authorization.k8s.io/memcached-operator-proxy-role created
    rolebinding.rbac.authorization.k8s.io/memcached-operator-leader-election-rolebinding created
    clusterrolebinding.rbac.authorization.k8s.io/memcached-operator-manager-rolebinding created
    clusterrolebinding.rbac.authorization.k8s.io/memcached-operator-proxy-rolebinding created
    service/memcached-operator-controller-manager-metrics-service created
    deployment.apps/memcached-operator-controller-manager created
    liumiaocn:memcached-operator liumiao$

*  结果确认

liumiaocn:memcached-operator liumiao$ kubectl get service -A |grep memcache
    memcached-operator-system   memcached-operator-controller-manager-metrics-service   ClusterIP   10.110.206.48   <none>        8443/TCP                 110s
    liumiaocn:memcached-operator liumiao$ kubectl get pod -A |grep memcache
    memcached-operator-system   memcached-operator-controller-manager-5df85cb9cb-fmcns   2/2     Running   0          119s
    liumiaocn:memcached-operator liumiao$ 
    liumiaocn:memcached-operator liumiao$ kubectl get deployment -A |grep memcache
    memcached-operator-system   memcached-operator-controller-manager   1/1     1            1           2m13s
    liumiaocn:memcached-operator liumiao$

*  crd确认

liumiaocn:memcached-operator liumiao$ kubectl get crds
    NAME                           CREATED AT
    memcacheds.cache.example.com   2020-11-24T06:32:57Z
    liumiaocn:memcached-operator liumiao$

详细信息确认

liumiaocn:memcached-operator liumiao$ kubectl describe crd memcacheds.cache.example.com
    Name:         memcacheds.cache.example.com
    Namespace:    
    Labels:       <none>
    Annotations:  controller-gen.kubebuilder.io/version: v0.3.0
    API Version:  apiextensions.k8s.io/v1
    Kind:         CustomResourceDefinition
    Metadata:
      Creation Timestamp:  2020-11-24T06:32:57Z
      Generation:          1
      Managed Fields:
        API Version:  apiextensions.k8s.io/v1
        Fields Type:  FieldsV1
        fieldsV1:
          f:status:
            f:acceptedNames:
              f:listKind:
              f:singular:
        Manager:      kube-apiserver
        Operation:    Update
        Time:         2020-11-24T06:32:57Z
        API Version:  apiextensions.k8s.io/v1beta1
        Fields Type:  FieldsV1
        fieldsV1:
          f:metadata:
            f:annotations:
              .:
              f:controller-gen.kubebuilder.io/version:
              f:kubectl.kubernetes.io/last-applied-configuration:
          f:spec:
            f:conversion:
              .:
              f:strategy:
            f:group:
            f:names:
              f:kind:
              f:listKind:
              f:plural:
              f:singular:
            f:preserveUnknownFields:
            f:scope:
            f:subresources:
              .:
              f:status:
            f:validation:
              .:
              f:openAPIV3Schema:
                .:
                f:description:
                f:properties:
                  .:
                  f:apiVersion:
                    .:
                    f:description:
                    f:type:
                  f:kind:
                    .:
                    f:description:
                    f:type:
                  f:metadata:
                    .:
                    f:type:
                  f:spec:
                    .:
                    f:description:
                    f:properties:
                      .:
                      f:foo:
                        .:
                        f:description:
                        f:type:
                    f:type:
                  f:status:
                    .:
                    f:description:
                    f:type:
                f:type:
            f:version:
            f:versions:
          f:status:
            f:acceptedNames:
              f:kind:
              f:plural:
            f:conditions:
            f:storedVersions:
        Manager:         kubectl
        Operation:       Update
        Time:            2020-11-24T06:33:00Z
      Resource Version:  35707
      Self Link:         /apis/apiextensions.k8s.io/v1/customresourcedefinitions/memcacheds.cache.example.com
      UID:               9ca0a50d-797b-4361-b9e8-44ee46979cbd
    Spec:
      Conversion:
        Strategy:  None
      Group:       cache.example.com
      Names:
        Kind:                   Memcached
        List Kind:              MemcachedList
        Plural:                 memcacheds
        Singular:               memcached
      Preserve Unknown Fields:  true
      Scope:                    Namespaced
      Versions:
        Name:  v1
        Schema:
          openAPIV3Schema:
            Description:  Memcached is the Schema for the memcacheds API
            Properties:
              API Version:
                Description:  APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
                Type:         string
              Kind:
                Description:  Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
                Type:         string
              Metadata:
                Type:  object
              Spec:
                Description:  MemcachedSpec defines the desired state of Memcached
                Properties:
                  Foo:
                    Description:  Foo is an example field of Memcached. Edit Memcached_types.go to remove/update
                    Type:         string
                Type:             object
              Status:
                Description:  MemcachedStatus defines the observed state of Memcached
                Type:         object
            Type:             object
        Served:               true
        Storage:              true
        Subresources:
          Status:
    Status:
      Accepted Names:
        Kind:       Memcached
        List Kind:  MemcachedList
        Plural:     memcacheds
        Singular:   memcached
      Conditions:
        Last Transition Time:  2020-11-24T06:32:57Z
        Message:               no conflicts found
        Reason:                NoConflicts
        Status:                True
        Type:                  NamesAccepted
        Last Transition Time:  2020-11-24T06:32:57Z
        Message:               the initial names have been accepted
        Reason:                InitialNamesAccepted
        Status:                True
        Type:                  Established
      Stored Versions:
        v1
    Events:  <none>
    liumiaocn:memcached-operator liumiao$

# 步骤5: 创建自定义资源 #

> 执行命令：kubectl apply -f config/samples/cache\_v1\_memcached.yaml

liumiaocn:memcached-operator liumiao$ kubectl apply -f config/samples/cache_v1_memcached.yaml 
    memcached.cache.example.com/memcached-sample created
    liumiaocn:memcached-operator liumiao$

确认Operator相关日志信息

liumiaocn:memcached-operator liumiao$ kubectl logs deployment.apps/memcached-operator-controller-manager -n memcached-operator-system -c manager
    2020-11-24T06:33:10.178Z	INFO	controller-runtime.metrics	metrics server is starting to listen	{"addr": "127.0.0.1:8080"}
    2020-11-24T06:33:10.179Z	INFO	setup	starting manager
    I1124 06:33:10.179468       1 leaderelection.go:242] attempting to acquire leader lease  memcached-operator-system/f1c5ece8.example.com...
    2020-11-24T06:33:10.179Z	INFO	controller-runtime.manager	starting metrics server	{"path": "/metrics"}
    I1124 06:33:10.285304       1 leaderelection.go:252] successfully acquired lease memcached-operator-system/f1c5ece8.example.com
    2020-11-24T06:33:10.286Z	INFO	controller	Starting EventSource	{"reconcilerGroup": "cache.example.com", "reconcilerKind": "Memcached", "controller": "memcached", "source": "kind source: /, Kind="}
    2020-11-24T06:33:10.286Z	DEBUG	controller-runtime.manager.events	Normal	{"object": {"kind":"ConfigMap","namespace":"memcached-operator-system","name":"f1c5ece8.example.com","uid":"93c817f8-5a1b-46c3-a579-974425b59d14","apiVersion":"v1","resourceVersion":"35765"}, "reason": "LeaderElection", "message": "memcached-operator-controller-manager-5df85cb9cb-fmcns_db02b1d3-c780-42ab-99f1-56da6bcb7ed9 became leader"}
    2020-11-24T06:33:10.387Z	INFO	controller	Starting Controller	{"reconcilerGroup": "cache.example.com", "reconcilerKind": "Memcached", "controller": "memcached"}
    2020-11-24T06:33:10.387Z	INFO	controller	Starting workers	{"reconcilerGroup": "cache.example.com", "reconcilerKind": "Memcached", "controller": "memcached", "worker count": 1}
    2020-11-24T06:37:51.245Z	DEBUG	controller	Successfully Reconciled	{"reconcilerGroup": "cache.example.com", "reconcilerKind": "Memcached", "controller": "memcached", "name": "memcached-sample", "namespace": "default"}
    liumiaocn:memcached-operator liumiao$

# 步骤6: 删除CR和相关资源 #

> 执行命令：kubectl delete -f config/samples/cache\_v1\_memcached.yaml

liumiaocn:memcached-operator liumiao$ kubectl delete -f config/samples/cache_v1_memcached.yaml
    memcached.cache.example.com "memcached-sample" deleted
    liumiaocn:memcached-operator liumiao$ kubectl logs deployment.apps/memcached-operator-controller-manager -n memcached-operator-system -c manager
    2020-11-24T06:33:10.178Z	INFO	controller-runtime.metrics	metrics server is starting to listen	{"addr": "127.0.0.1:8080"}
    2020-11-24T06:33:10.179Z	INFO	setup	starting manager
    I1124 06:33:10.179468       1 leaderelection.go:242] attempting to acquire leader lease  memcached-operator-system/f1c5ece8.example.com...
    2020-11-24T06:33:10.179Z	INFO	controller-runtime.manager	starting metrics server	{"path": "/metrics"}
    I1124 06:33:10.285304       1 leaderelection.go:252] successfully acquired lease memcached-operator-system/f1c5ece8.example.com
    2020-11-24T06:33:10.286Z	INFO	controller	Starting EventSource	{"reconcilerGroup": "cache.example.com", "reconcilerKind": "Memcached", "controller": "memcached", "source": "kind source: /, Kind="}
    2020-11-24T06:33:10.286Z	DEBUG	controller-runtime.manager.events	Normal	{"object": {"kind":"ConfigMap","namespace":"memcached-operator-system","name":"f1c5ece8.example.com","uid":"93c817f8-5a1b-46c3-a579-974425b59d14","apiVersion":"v1","resourceVersion":"35765"}, "reason": "LeaderElection", "message": "memcached-operator-controller-manager-5df85cb9cb-fmcns_db02b1d3-c780-42ab-99f1-56da6bcb7ed9 became leader"}
    2020-11-24T06:33:10.387Z	INFO	controller	Starting Controller	{"reconcilerGroup": "cache.example.com", "reconcilerKind": "Memcached", "controller": "memcached"}
    2020-11-24T06:33:10.387Z	INFO	controller	Starting workers	{"reconcilerGroup": "cache.example.com", "reconcilerKind": "Memcached", "controller": "memcached", "worker count": 1}
    2020-11-24T06:37:51.245Z	DEBUG	controller	Successfully Reconciled	{"reconcilerGroup": "cache.example.com", "reconcilerKind": "Memcached", "controller": "memcached", "name": "memcached-sample", "namespace": "default"}
    2020-11-24T06:41:34.574Z	DEBUG	controller	Successfully Reconciled	{"reconcilerGroup": "cache.example.com", "reconcilerKind": "Memcached", "controller": "memcached", "name": "memcached-sample", "namespace": "default"}
    liumiaocn:memcached-operator liumiao$

最终的目录和文件结构如下所示

liumiaocn:memcached-operator liumiao$ pwd
    /Users/liumiao/memcached-operator
    liumiaocn:memcached-operator liumiao$ tree .
    .
    ├── Dockerfile
    ├── Makefile
    ├── PROJECT
    ├── api
    │   └── v1
    │       ├── groupversion_info.go
    │       ├── memcached_types.go
    │       └── zz_generated.deepcopy.go
    ├── bin
    │   └── manager
    ├── config
    │   ├── certmanager
    │   │   ├── certificate.yaml
    │   │   ├── kustomization.yaml
    │   │   └── kustomizeconfig.yaml
    │   ├── crd
    │   │   ├── bases
    │   │   │   └── cache.example.com_memcacheds.yaml
    │   │   ├── kustomization.yaml
    │   │   ├── kustomizeconfig.yaml
    │   │   └── patches
    │   │       ├── cainjection_in_memcacheds.yaml
    │   │       └── webhook_in_memcacheds.yaml
    │   ├── default
    │   │   ├── kustomization.yaml
    │   │   ├── manager_auth_proxy_patch.yaml
    │   │   ├── manager_webhook_patch.yaml
    │   │   └── webhookcainjection_patch.yaml
    │   ├── manager
    │   │   ├── kustomization.yaml
    │   │   └── manager.yaml
    │   ├── prometheus
    │   │   ├── kustomization.yaml
    │   │   └── monitor.yaml
    │   ├── rbac
    │   │   ├── auth_proxy_client_clusterrole.yaml
    │   │   ├── auth_proxy_role.yaml
    │   │   ├── auth_proxy_role_binding.yaml
    │   │   ├── auth_proxy_service.yaml
    │   │   ├── kustomization.yaml
    │   │   ├── leader_election_role.yaml
    │   │   ├── leader_election_role_binding.yaml
    │   │   ├── memcached_editor_role.yaml
    │   │   ├── memcached_viewer_role.yaml
    │   │   ├── role.yaml
    │   │   └── role_binding.yaml
    │   ├── samples
    │   │   ├── cache_v1_memcached.yaml
    │   │   └── kustomization.yaml
    │   ├── scorecard
    │   │   ├── bases
    │   │   │   └── config.yaml
    │   │   ├── kustomization.yaml
    │   │   └── patches
    │   │       ├── basic.config.yaml
    │   │       └── olm.config.yaml
    │   └── webhook
    │       ├── kustomization.yaml
    │       ├── kustomizeconfig.yaml
    │       └── service.yaml
    ├── controllers
    │   ├── memcached_controller.go
    │   └── suite_test.go
    ├── cover.out
    ├── go.mod
    ├── go.sum
    ├── hack
    │   └── boilerplate.go.txt
    ├── main.go
    └── testbin
        ├── bin
        │   ├── etcd
        │   ├── kube-apiserver
        │   └── kubectl
        └── setup-envtest.sh
    
    21 directories, 54 files
    liumiaocn:memcached-operator liumiao$

# 总结 #

看似只是按照步骤创建了一系列的操作，实际上如果有真正进行CRD封装的经验的会了解这个过程中脚手架确实能帮助省去了很多精力，比如可以直接将精力放在生成的controller的实现之上。

# 参考内容 #

https://sdk.operatorframework.io/docs/building-operators/golang/quickstart/

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