k8s yaml文件说明

nginx yaml文件说明

---
#定义nginx命名空间
apiVersion: v1
kind: Namespace
metadata:
  name: k8s-nginx           #自定义的命名空间

---
#定义nginx service
apiVersion: v1
kind: Service
metadata:
  name: k8s-nginx
  namespace: k8s-nginx
  labels:
    app: k8s-nginx
spec:
  type: NodePort
  ports:
  - port: 80                             #分配集群ip的端口
    targetPort: 80                   #分配pod端口
    nodePort: 10280              #node节点端口
    protocol: TCP
  clusterIP: 169.169.249.80   #分配集群ip
  selector:
   app: k8s-nginx

---
#创建 deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deploy
  namespace: k8s-nginx
  labels:
    app: k8s-nginx
spec:
  replicas: 2            #生成复本数量为2
  selector:
    matchLabels:
      app: k8s-nginx
  template:
    metadata:
      labels:
        app: k8s-nginx
      annotations:
        app: nginx-clouster
    spec:
      containers:
      - name: nginx
        image: docker.io/nginx
        imagePullPolicy: IfNotPresent
        resources:
          limits:
            cpu: 300m
            memory: 3000Mi
          requests:
            cpu: 100m
            memory: 100Mi
        ports:
        - containerPort: 80

如果要修改nginx.yaml文件,二种方式
第一种:
直接修改 nginx.yaml并保存
kubectl apply -f nginx.yaml

#kubectl get pod,svc,deploy -n k8s-nginx
NAME                                READY   STATUS    RESTARTS   AGE
pod/nginx-deploy-5d677c4495-5wmf2   1/1     Running   0          26m
pod/nginx-deploy-5d677c4495-lzv6g   1/1     Running   0          37m
pod/nginx-deploy-5d677c4495-rpfgg   1/1     Running   0          37m

NAME                TYPE       CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
service/k8s-nginx   NodePort   169.169.249.80   <none>        80:10280/TCP   42m

NAME                                 DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deployment.extensions/nginx-deploy   3         3         3            3           39m

然后再执行以下命令

kubectl edit deployment.extensions/nginx-deploy -n k8s-nginx
直接编辑,完成后保存,保存后要查看是否出错,如果没有出错会立即生效,如果有出错,下面会出现error字样,并在/tmp下生成一个临时文件,此时原文件并没有修改,不会影响线上业务

原文地址：http://blog.51cto.com/running/2324468