ingress-nginx-helm/examples/deployment/haproxy/README.md

# Deploying HAProxy Ingress Controller

If you don't have a Kubernetes cluster, please refer to [setup](/docs/dev/setup.md)
for instructions on how to create a new one.

## Prerequisites

This ingress controller doesn't yet have support for
[ingress classes](/examples/PREREQUISITES.md#ingress-class). You MUST turn
down any existing ingress controllers before running HAProxy Ingress controller or
they will fight for Ingresses. This includes any cloudprovider controller.

This document has also the following prerequisites:

* Deploy a [web app](/examples/PREREQUISITES.md#test-http-service) for testing
* Create a [TLS secret](/examples/PREREQUISITES.md#tls-certificates) named `tls-secret` to be used as default TLS certificate

The web app can be created as follow:

```console
$ kubectl run http-svc \
  --image=gcr.io/google_containers/echoserver:1.3 \
  --port=8080 \
  --replicas=2 \
  --expose
```

Creating the TLS secret:

```console
$ openssl req \
  -x509 -newkey rsa:2048 -nodes -days 365 \
  -keyout tls.key -out tls.crt -subj '/CN=localhost'
$ kubectl create secret tls tls-secret --cert=tls.crt --key=tls.key
$ rm -v tls.crt tls.key
```

## Default backend

Deploy a default backend used to serve `404 Not Found` pages:

```console
$ kubectl run ingress-default-backend \
  --image=gcr.io/google_containers/defaultbackend:1.0 \
  --port=8080 \
  --limits=cpu=10m,memory=20Mi \
  --expose
```

Check if the default backend is up and running:

```console
$ kubectl get pod
NAME                                       READY     STATUS    RESTARTS   AGE
ingress-default-backend-1110790216-gqr61   1/1       Running   0          10s
```

## Controller

Deploy HAProxy Ingress:

```console
$ kubectl create -f haproxy-ingress.yaml
```

Check if the controller was successfully deployed:

```console
$ kubectl get pod -w
NAME                                       READY     STATUS    RESTARTS   AGE
haproxy-ingress-2556761959-tv20k           1/1       Running   0          12s
ingress-default-backend-1110790216-gqr61   1/1       Running   0          3m
^C
```

Deploy the ingress resource of our already deployed web app:

```console
$ kubectl create -f - <<EOF
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: app
spec:
  rules:
  - host: foo.bar
    http:
      paths:
      - path: /
        backend:
          serviceName: http-svc
          servicePort: 8080
EOF
```

Exposing the controller as a `type=NodePort` service:

```console
$ kubectl expose deploy/haproxy-ingress --type=NodePort
$ kubectl get svc/haproxy-ingress -oyaml
```

Look for `nodePort` field next to `port: 80`.

Change below `172.17.4.99` to the host's IP and `30876` to the `nodePort`:

```console
$ curl -i 172.17.4.99:30876
HTTP/1.1 404 Not Found
Date: Mon, 05 Feb 2017 22:59:36 GMT
Content-Length: 21
Content-Type: text/plain; charset=utf-8

default backend - 404
```

Using default backend because host was not found.

Now try to send a header:

```console
$ curl -i 172.17.4.99:30876 -H 'Host: foo.bar'
HTTP/1.1 200 OK
Server: nginx/1.9.11
Date: Mon, 05 Feb 2017 23:00:33 GMT
Content-Type: text/plain
Transfer-Encoding: chunked

CLIENT VALUES:
client_address=10.2.18.5
command=GET
real path=/
query=nil
request_version=1.1
request_uri=http://foo.bar:8080/
...
```

## Troubleshooting

If you have any problem, check logs and events of HAProxy Ingress POD:

```console
$ kubectl get pod
NAME                                       READY     STATUS    RESTARTS   AGE
haproxy-ingress-2556761959-tv20k           1/1       Running   0          9m
...

$ kubectl logs haproxy-ingress-2556761959-tv20k
$ kubectl describe pod/haproxy-ingress-2556761959-tv20k
```