k8s作业4

Q1：创建一个pod，其中运行着nginx、 redis、 memcached、 consul 4个容器

apiVersion: apps/v1
kind: Deployment
metadata:
  name: khb
  namespace: aliang-cka
spec:
  replicas: 1
  selector:
    matchLabels:
      project: demo
      app: web
  template:
    metadata:
      labels:
        project: demo
        app: web
    spec:
      containers:
      - name: web
        image: nginx
      - name: db
        image: redis
      - name: db2
        image: memcached
      - name: con

kubectl apply -f deployment.yaml

kubectl describe pod khb-5656f9d77-ff4xp -n aliang-cka

Q2：在节点上配置kubelet托管启动一个pod

• 节点： k8s-node1
• pod名称： web
• 镜像： nginx 

A2：创建pod yaml

vim pod-static.yaml

apiVersion: v1
kind: Pod
metadata:
  name: web
  labels:
    app: myapp
spec:
  containers:
  - name: web
    image: nginx

移到node1节点的/etc/kubernetes/manifests目录下，就会自动拉起

Q3：检查容器中文件是否创建，如果没有被检测到pod重启

• 文件路径： /tmp/test.sock 

A3： vim pod-health-check.yaml

apiVersion: v1
kind: Pod
metadata:
  labels:
    test: liveness
  name: liveness-exec
spec:
  containers:
  - name: liveness
    image: busybox
    args:
    - /bin/sh
    - -c
    - touch /tmp/test.sock; sleep 30; rm -rf /tmp/test.sock; sleep 30
    livenessProbe:
      exec:
        command:
        - cat
        - /tmp/test.sock
      initialDelaySeconds: 5
      periodSeconds: 5
    readinessProbe:
      exec:
        command:
        - cat
        - /tmp/test.sock
      initialDelaySeconds: 5
      periodSeconds: 5