3.5.6. Defining custom API objects¶

创建CRD及实例¶

创建CustomResourceDefinition类型websites:

apiVersion: apiextensions.k8s.io/v1beta1 
kind: CustomResourceDefinition
metadata:
  name: websites.extensions.example.com 
spec:
  scope: Namespaced
  group: extensions.example.com 
  version: v1
  names:
    kind: Website
    singular: website
    plural: websites

使用新的CRD创建websites实例:

apiVersion: extensions.example.com/v1 
kind: Website
metadata:
  name: kubia
spec:
  gitRepo: https://github.com/luksa/kubia-website-example.git

查看:

$ kubectl get websites
$ kubectl get website kubia -o yaml
$ kubectl delete website kubia

让创建的CRD真正生效¶

现在所有都已经创建成功，其实只是在api server(或etcd里面有相关数据，没有任何执行效果)

创建sa和clusterrolebinding:

$ kubectl create serviceaccount website-controller
$ kubectl create clusterrolebinding website-controller --clusterrole=cluster-admin --serviceaccount=default:website-controller

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: website-controller 
spec:
  replicas: 1
  template:
    metadata:
      name: website-controller 
      labels:
        app: website-controller 
    spec:
      serviceAccountName: website-controller 
      containers:
      - name: main
        image: luksa/website-controller 
      - name: proxy
        image: luksa/kubectl-proxy:1.6.2

注: 这儿的image(luksa/website-controller)来自项目 [1]

出现如下界面说明成功了:

2020/02/21 06:13:08 Received watch event: ADDED: kubia: https://github.com/luksa/kubia-website-example.git
2020/02/21 06:13:08 Creating services with name kubia-website in namespace default
2020/02/21 06:13:08 response Status: 201 Created
2020/02/21 06:13:08 Creating deployments with name kubia-website in namespace default
2020/02/21 06:13:08 response Status: 201 Created
2020/02/21 06:14:52 Received watch event: ADDED: kubia: https://github.com/luksa/kubia-website-example.git
2020/02/21 06:14:52 Creating services with name kubia-website in namespace default

查看相关资源:

$kubectl get deploy,svc,po
NAME                                       DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deployment.extensions/kubia-website        1         1         1            1           26m
deployment.extensions/website-controller   1         1         1            1           32m

NAME                     TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)           AGE
service/kubia-website    NodePort   172.21.10.42   <none>        80:30679/TCP      26m

NAME                                          READY     STATUS    RESTARTS   AGE
pod/kubia-website-5f5db45877-gmfq7            2/2       Running   0          26m
pod/website-controller-79cb49db46-j7bt4       2/2       Running   1          32m