Kubernetes Nginx 端口 80 在公共 ip 地址上不可用（仅私有地址）

Question

I am following the tutorial here: https://www.digitalocean.com/community/tutorials/how-to-deploy-a-php-application-with-kubernetes-on-ubuntu-18-04#conclusion

I have this in the nginx_service.yaml

apiVersion: v1
kind: Service
metadata:
  name: nginx
  labels:
    tier: backend
spec:
  selector:
    app: nginx
    tier: backend
  ports:
  - protocol: TCP
    port: 80
  externalIPs:
  - 51.159.171.84

And this in the nginx_deployment.yaml

...
      containers:
      - name: nginx
        image: nginx:1.18.0
        ports:
        - containerPort: 80

When showing the services, I can see the external ip:

kubectl get services -o wide
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP     PORT(S)    AGE    SELECTOR
kubernetes   ClusterIP   10.96.0.1       <none>          443/TCP    2d2h   <none>
nginx        ClusterIP   10.111.105.46   51.159.171.84   80/TCP     2d     app=nginx,tier=backend
php          ClusterIP   10.108.10.193   <none>          9000/TCP   2d1h   app=php,tier=backend

However, from the browser: http://51.159.171.84 shows connection refused. Same with curl:

curl http://51.159.171.84
curl: (7) Failed to connect to 51.159.171.84 port 80: Connection refused

but by using curl and private IP, it works:

curl 10.111.105.46

How to make the nginx service accept connection on the public ip address?

Answer 1

Is Port 80 open on the host? if not enable it sudo ufw allow 80/tcp.