Trying to use traefik igress controller for k3s

oomichi commented 1 month ago

traefik ingress controller is installed by default:

$ k3s kubectl get ingressclass
NAME      CONTROLLER                      PARAMETERS   AGE
traefik   traefik.io/ingress-controller   <none>       2d18h

oomichi commented 1 month ago

The test manifest:

$ cat nginx-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 1
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-svc
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: minimal-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - http:
      paths:
      - path: /testpath
        pathType: Prefix
        backend:
          service:
            name: nginx-svc
            port:
              number: 80

traefik is the default ingress controller at k3s, and the ADDRESS is the host IP address:

$ k3s kubectl get ingress
NAME              CLASS     HOSTS   ADDRESS     PORTS   AGE
minimal-ingress   traefik   *       10.0.2.15   80      104s

user can access to nginx, but rewrite-target feature doesn't work:

$ curl http://10.0.2.15/testpath
<html>
<head><title>404 Not Found</title></head>
<body bgcolor="white">
<center><h1>404 Not Found</h1></center>
<hr><center>nginx/1.14.2</center>
</body>
</html>

oomichi commented 1 month ago

Use the path / and self SSL certficate

$ cat nginx-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 1
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-svc
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: minimal-ingress
  annotations:
    traefik.ingress.kubernetes.io/router.tls: "true"
spec:
  rules:
  - http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: nginx-svc
            port:
              number: 80

and

 curl -k https://localhost
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>

oomichi / try-kubernetes

Trying to use traefik igress controller for k3s #143