K8S

httpGet 指针

apiVersion: v1
kind: Pod
metadata:
  name: liveness-httpget-pod
  namespace: default
spec:
  containers:
  - name: liveness-httpget-container
    image: busybox:latest
    imagePullPolicy: IfNotPresent
    command: ["/bin/sh","-c","mkdir -p /data/web/html; echo 'abc' > /data/web/html/index.html; /bin/httpd -f -h /data/web/html"]
    livenessProbe:
      httpGet:
        port: 80
        path: /index.html
      initialDelaySeconds: 1
      periodSeconds: 3

 POD

apiVersion: apps/v1
# POD名字
kind: ReplicaSet
metadata:
    name: myapp
    # 放入那个名称空间
    namespace: default
spec:
    replicas: 2
    selector:
        matchLabels:
            app: myapp
            release: canary
    template:
        metadata:
            name: myapp-pod
            labels:
                app: myapp
                release: canary
                environment: qa
        spec:
            containers:
            - name: myapp-container
              image: ikubernetes/myapp:v1
              ports:
              - name: http
                containerPort: 80

apiVersion: v1
kind: Service
metadata:
    name: myapp
    namespace: default

spec:
    selector:
        app: myapp
        release: canary
    clusterIP: 10.99.99.99
    type: NodePort
    ports:
    - port: 80
      targetPort: 80
      nodePort: 30080

#查看所解析的地址

dig -t A myapp-svc.default.svc.cluster.local. @10.96.0.10

#查看本机的kube=DNS地址

 kubectl get svc -n kube-system

# 修改server访问只用一台去轮训，None是取消一台，让所有的pod继续轮训。

kubectl patch svc myapp -p '{"spec":{"sessionAffinity":"ClientIP"}}'

kubectl patch svc myapp -p '{"spec":{"sessionAffinity":"None"}}'