108 lines
3.5 KiB
Markdown
108 lines
3.5 KiB
Markdown
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# Deploying HAProxy Ingress Controller
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Don't have a Kubernetes cluster? Single-node of [CoreOS Kubernetes](https://github.com/coreos/coreos-kubernetes/) is a good starting point.
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Deploy a default backend used to serve `404 Not Found` pages:
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kubectl run ingress-default-backend \
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--image=gcr.io/google_containers/defaultbackend:1.0 \
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--port=8080 \
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--limits=cpu=10m,memory=20Mi \
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--expose
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Check if the default backend is up and running:
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kubectl get pod
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NAME READY STATUS RESTARTS AGE
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ingress-default-backend-1110790216-gqr61 1/1 Running 0 10s
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Deploy certificate and private key used to serve https on ingress that doesn't provide it's own certificate. For testing purposes a self signed certificate is ok:
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openssl req \
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-x509 -newkey rsa:2048 -nodes -days 365 \
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-keyout tls.key -out tls.crt -subj '/CN=localhost'
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kubectl create secret tls ingress-default-ssl --cert=tls.crt --key=tls.key
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rm -v tls.crt tls.key
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Deploy HAProxy Ingress. Note that `hostNetwork: true` could be uncommented if your cluster has IPs that doesn't use ports 80, 443 and 1936.
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kubectl create -f haproxy-ingress.yaml
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Check if the controller was successfully deployed:
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kubectl get pod -w
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NAME READY STATUS RESTARTS AGE
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haproxy-ingress-2556761959-tv20k 1/1 Running 0 12s
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ingress-default-backend-1110790216-gqr61 1/1 Running 0 3m
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^C
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Problem? Check logs and events of the POD:
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kubectl logs haproxy-ingress-2556761959-tv20k
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kubectl describe haproxy-ingress-2556761959-tv20k
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Deploy some web application and it's ingress resource:
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kubectl run nginx --image=nginx:alpine --port=80 --expose
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kubectl create -f - <<EOF
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apiVersion: extensions/v1beta1
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kind: Ingress
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metadata:
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name: app
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spec:
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rules:
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- host: foo.bar
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http:
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paths:
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- path: /
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backend:
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serviceName: nginx
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servicePort: 80
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EOF
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Exposing HAProxy Ingress depend on your Kubernetes environment. If `hostNetwork` was defined just use host's public IP, otherwise expose the controller as a `type=NodePort` service:
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kubectl expose deploy/haproxy-ingress --type=NodePort
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kubectl get svc/haproxy-ingress -oyaml
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Look for `nodePort` field next to `port: 80`.
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Change below `172.17.4.99` to the host's IP and `30876` to the `nodePort`, or remove `:30876` if using `hostNetwork`:
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curl -i 172.17.4.99:30876
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HTTP/1.1 404 Not Found
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Date: Mon, 05 Feb 2017 22:59:36 GMT
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Content-Length: 21
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Content-Type: text/plain; charset=utf-8
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default backend - 404
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Using default backend because host was not found.
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Now try to send a header:
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curl -i 172.17.4.99:30876 -H 'Host: foo.bar'
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HTTP/1.1 200 OK
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Server: nginx/1.11.9
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Date: Mon, 05 Feb 2017 23:00:33 GMT
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Content-Type: text/html
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Content-Length: 612
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Last-Modified: Tue, 24 Jan 2017 18:53:46 GMT
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ETag: "5887a2ba-264"
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Accept-Ranges: bytes
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<!DOCTYPE html>
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<html>
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<head>
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<title>Welcome to nginx!</title>
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...
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Not what you were looking for? Have a look at controller's logs:
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kubectl get pod
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NAME READY STATUS RESTARTS AGE
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haproxy-ingress-2556761959-tv20k 1/1 Running 0 9m
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...
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kubectl logs haproxy-ingress-2556761959-tv20k | less -S
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