kubernets exposes service ports to the outside world

1. Enter the /root directory and edit the corresponding yaml file
2. Modify/add the spec/template/spec/containers/ports node and add the following content

- containerPort: 8080
          protocol: TCP

3. Add the yaml file of the service, usually named as xxxx-srv.yaml, where xxxx is the service name. The content is as follows:

apiVersion: v1
kind: Service
metadata:
  name: service name
  namespace: default
  labels:
    k8s-app: service name (this needs to be consistent with the k8s-app field named in the xxxx-rc.yaml file)
    kubernetes.io/name: "service name"
spec:
  type: NodePort
  selector:
    k8s-app: service name
  ports:
  - name: service name-sv
    port: 8081 (the port on the pod)
    targetPort: 8081 (the port on the service)
    nodePort: 30964 (port on node, if not set it will be automatically assigned by kubernets)

4. Create a service

kubectl create -f xxxx-svc.yaml

5. View the service port number, where NodePort is the port number exposed by the service to the outside world

kubectl describe service xxxx-service

6. Edit /opt/haproxy/config/haproxy.cfg to add haproxy configuration.

listen servicename
    bind local ip: the address open to the outside world
    mode tcp
    server server1 service address: service port number check port service port number inter 2000 rise 2 fall 2