kubernetes 的 yaml格式应用

kubernetes系列

• 一： kubernetes yaml 配置文件

一： kubernetes yaml 配置文件

1.1 yaml 语言

YAML 是一种简洁的非标记语言。
语法格式：
• 缩进表示层级关系
• 不支持制表符“tab”缩进，使用空格缩进
• 通常开头缩进 2 个空格
• 字符后缩进 1 个空格，如冒号、逗号等
• “---” 表示YAML格式，一个文件的开始
• “#”注释

nignx Demo 配置 
vim nginx-deployment.yaml 
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.15.4
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
  labels:
    app: nginx
spec:
  type: NodePort
  ports:
  - port: 80
    targetPort: 80
  selector:
    app: nginx
----

kubectl create -f nginx-deployment.yaml 

1.2： 配置文件的解释

1.3：YAML配置文件的生成

• 用run命令生成
kubectl run --image=nginx my-deploy -o yaml --dry-run > my-deploy.yaml 
• 用get命令导出
kubectl get my-deploy/nginx -o=yaml --export > my-deploy.yaml
• Pod容器的字段拼写忘记了
kubectl explain pods.spec.containers

kubectl run --image=nginx my-deploy -o yaml --dry-run > my-deploy.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    run: my-deploy
  name: my-deploy
spec:
  replicas: 1
  selector:
    matchLabels:
      run: my-deploy
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        run: my-deploy
    spec:
      containers:
      - image: nginx
        name: my-deploy
        resources: {}
status: {}
---

kubectl get deploy/nginx -o=yaml --export > my-deploy.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "1"
  creationTimestamp: null
  generation: 1
  labels:
    run: nginx
  name: nginx
  selfLink: /apis/extensions/v1beta1/namespaces/default/deployments/nginx
spec:
  progressDeadlineSeconds: 600
  replicas: 3
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      run: nginx
  strategy:
    rollingUpdate:
      maxSurge: 25%
      maxUnavailable: 25%
    type: RollingUpdate
  template:
    metadata:
      creationTimestamp: null
      labels:
        run: nginx
    spec:
      containers:
      - image: nginx:1.14
        imagePullPolicy: IfNotPresent
        name: nginx
        ports:
        - containerPort: 80
          protocol: TCP
        resources: {}
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
      dnsPolicy: ClusterFirst
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      terminationGracePeriodSeconds: 30
status: {}