expose nginx-ingress TCP-Service on port 9000

2020-08-23 17:30:53 +02:00 · 2020-08-23 17:30:53 +02:00 · 6cff7d1f9d
commit 6cff7d1f9d
parent bd2095e5e2
1 changed files with 105 additions and 1 deletions
--- a/README.md
+++ b/README.md
@ -20,7 +20,7 @@ finally `systemctl daemon-reload` and `systemctl restart k3s`
 ### Installation
 https://kubernetes.github.io/ingress-nginx/deploy/#bare-metal

-### Switch ingress-Service from NodePort to LoadBalancer
+### Change service type from NodePort to LoadBalancer
 `kubectl edit service -n ingress-nginx` and change `type: NodePort` to `type: LoadBalancer`

 Port 80 and 443 should listen now on an *External-IP* `kubectl get all --all-namespaces`:
@ -72,3 +72,107 @@ spec:
        env:     
 [...]
 ```
+
+### Deploy nginx-service and expose via nginx-ingress on TCP-port 9000
+my-nginx-deployment.yml:
+```
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: my-nginx
+spec:
+  selector:
+    matchLabels:
+      run: my-nginx
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        run: my-nginx
+    spec:
+      containers:
+      - name: my-nginx
+        image: nginx:alpine
+        ports:
+        - containerPort: 80
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: my-nginx
+  labels:
+    run: my-nginx
+spec:
+  ports:
+  - port: 80
+    protocol: TCP
+  selector:
+    run: my-nginx
+
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: tcp-services
+  namespace: ingress-nginx
+data:
+  9000: "default/my-nginx:80::PROXY"
+```
+Apply with `kubectl apply -f my-nginx-deployment.yml`:
+```
+deployment.apps/my-nginx created
+service/my-nginx created
+configmap/tcp-services created
+```
+Test: `kubectl get all`:
+```
+[...]
+NAME                 TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)   AGE
+[...]
+service/my-nginx     ClusterIP   10.43.118.13   <none>        80/TCP    99s
+[...]
+```
+Expose my-nginx app on nginx-ingress TCP-port 9000: `kubectl edit service -n ingress-nginx`
+
+```
+spec:   
+    clusterIP: 10.43.237.255                                                              
+    externalTrafficPolicy: Cluster
+    ports:
+    - name: http                                                                          
+      nodePort: 30312                                                                     
+      port: 80
+      protocol: TCP                                                                       
+      targetPort: http                                                                    
+    - name: https                                                                         
+      nodePort: 30366                                                                     
+      port: 443
+      protocol: TCP                                                                       
+      targetPort: https      
+*** ADD >>>
+    - name: proxied-tcp-9000
+      port: 9000
+      protocol: TCP
+      targetPort: 9000
+<<< ADD ***
+[...]
+```
+Verify nginx-ingress is listening on port 9000 with `kubectl get all --all-namespaces`:
+```
+[...]
+NAMESPACE       NAME                                         TYPE           CLUSTER-IP      EXTERNAL-IP    PORT(S)                                     AGE
+[...]
+ingress-nginx   service/ingress-nginx-controller             LoadBalancer   10.43.237.255   10.62.94.246   80:30312/TCP,443:30366/TCP,9000:31460/TCP   71m
+[...]
+```
+Test:
+```
+dominik@muggler:~$ curl -s http://10.62.94.246:9000
+<html>
+<head><title>400 Bad Request</title></head>
+<body>
+<center><h1>400 Bad Request</h1></center>
+<hr><center>nginx/1.19.2</center>
+</body>
+</html>
+```