k8s命令实战-Service

Service：Pod的服务发现和负载均衡

• 创建Service-CLusterIP

#暴露Deploy
kubectl expose deployment my-dep --port=8000 --target-port=80
《====》
kubectl expose deployment my-dep --port=8000 --target-port=80 --type=ClusterIP

#使用标签检索Pod
kubectl get pod -l app=my-dep

#查看pods的标签
kubectl get pods --show-labels

• yaml格式

apiVersion: v1
kind: Service
metadata:
  labels:
    app: my-dep
  name: my-dep
spec:
  selector:
    app: my-dep
  type: ClusterIP #默认type为ClusterIP
  ports:
  - port: 8000
    protocol: TCP
    targetPort: 80

• 集群内访问service
  1.api地址：service:ip
  2.api地址：服务名.名称空间.svc:ip (my-dep.default.svc:8000)

• 创建Service-NodePort

kubectl expose deployment my-dep --port=8000 --target-port=80 --type=NodePort

• yaml格式

apiVersion: v1
kind: Service
metadata:
  labels:
    app: my-dep
  name: my-dep
spec:
  selector:
    app: my-dep
  type: NodePort #NodePort范围在 30000-32767 之间
  ports:
  - port: 8000
    protocol: TCP
    targetPort: 80