c12s-kubespray/roles/kubernetes-apps/ingress_controller/ingress_nginx/README.md

Installation Guide
==================

Contents
--------

-   [Mandatory commands](#mandatory-commands)
-   [Install without RBAC roles](#install-without-rbac-roles)
-   [Install with RBAC roles](#install-with-rbac-roles)
-   [Custom Provider](#custom-provider)
-   [minikube](#minikube)
-   [AWS](#aws)
-   [GCE - GKE](#gce---gke)
-   [Azure](#azure)
-   [Baremetal](#baremetal)
-   [Using Helm](#using-helm)
-   [Verify installation](#verify-installation)
-   [Detect installed version](#detect-installed-version)
-   [Deploying the config-map](#deploying-the-config-map)

Generic Deployment
------------------

The following resources are required for a generic deployment.

### Mandatory commands

``` console
curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/namespace.yaml \
    | kubectl apply -f -

curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/default-backend.yaml \
    | kubectl apply -f -

curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/configmap.yaml \
    | kubectl apply -f -

curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/tcp-services-configmap.yaml \
    | kubectl apply -f -

curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/udp-services-configmap.yaml \
    | kubectl apply -f -
```

### Install without RBAC roles

``` console
curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/without-rbac.yaml \
    | kubectl apply -f -
```

### Install with RBAC roles

Please check the [RBAC](rbac.md) document.

``` console
curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/rbac.yaml \
    | kubectl apply -f -

curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/with-rbac.yaml \
    | kubectl apply -f -
```

Custom Service Provider Deployment
----------------------------------

There are cloud provider specific yaml files.

### minikube

For standard usage:

``` console
minikube addons enable ingress
```

For development:

1.  Disable the ingress addon:

    ``` console
    $ minikube addons disable ingress
    ```

2.  Use the [docker daemon](https://github.com/kubernetes/minikube/blob/master/docs/reusing_the_docker_daemon.md)
3.  [Build the image](../docs/development.md)
4.  Perform [Mandatory commands](#mandatory-commands)
5.  Install the `nginx-ingress-controller` deployment [without RBAC roles](#install-without-rbac-roles) or [with RBAC roles](#install-with-rbac-roles)
6.  Edit the `nginx-ingress-controller` deployment to use your custom image. Local images can be seen by performing `docker images`.

    ``` console
    $ kubectl edit deployment nginx-ingress-controller -n ingress-nginx
    ```

    edit the following section:

    ``` yaml
    image: <IMAGE-NAME>:<TAG>
    imagePullPolicy: IfNotPresent
    name: nginx-ingress-controller
    ```

7.  Confirm the `nginx-ingress-controller` deployment exists:

``` console
$ kubectl get pods -n ingress-nginx 
NAME                                       READY     STATUS    RESTARTS   AGE
default-http-backend-66b447d9cf-rrlf9      1/1       Running   0          12s
nginx-ingress-controller-fdcdcd6dd-vvpgs   1/1       Running   0          11s
```

### AWS

In AWS we use an Elastic Load Balancer (ELB) to expose the NGINX Ingress controller behind a Service of `Type=LoadBalancer`.
This setup requires to choose in which layer (L4 or L7) we want to configure the ELB:

-   [Layer 4](https://en.wikipedia.org/wiki/OSI_model#Layer_4:_Transport_Layer): use TCP as the listener protocol for ports 80 and 443.
-   [Layer 7](https://en.wikipedia.org/wiki/OSI_model#Layer_7:_Application_Layer): use HTTP as the listener protocol for port 80 and terminate TLS in the ELB

Patch the nginx ingress controller deployment to add the flag `--publish-service`

``` console
kubectl patch deployment -n ingress-nginx nginx-ingress-controller --type='json' \
  --patch="$(curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/publish-service-patch.yaml)"
```

For L4:

``` console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/aws/service-l4.yaml
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/aws/patch-configmap-l4.yaml
```

For L7:

Change line of the file `provider/aws/service-l7.yaml` replacing the dummy id with a valid one `"arn:aws:acm:us-west-2:XXXXXXXX:certificate/XXXXXX-XXXXXXX-XXXXXXX-XXXXXXXX"`
Then execute:

``` console
kubectl apply -f provider/aws/service-l7.yaml
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/aws/patch-configmap-l7.yaml
```

This example creates an ELB with just two listeners, one in port 80 and another in port 443

![Listeners](../docs/images/elb-l7-listener.png)

If the ingress controller uses RBAC run:

``` console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/patch-service-with-rbac.yaml
```

If not run:

``` console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/patch-service-without-rbac.yaml
```

### GCE - GKE

Patch the nginx ingress controller deployment to add the flag `--publish-service`

``` console
kubectl patch deployment -n ingress-nginx nginx-ingress-controller --type='json' \
  --patch="$(curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/publish-service-patch.yaml)"
```

``` console
curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/gce-gke/service.yaml \
    | kubectl apply -f -
```

If the ingress controller uses RBAC run:

``` console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/patch-service-with-rbac.yaml
```

If not run:

``` console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/patch-service-without-rbac.yaml
```

**Important Note:** proxy protocol is not supported in GCE/GKE

### Azure

Patch the nginx ingress controller deployment to add the flag `--publish-service`

``` console
kubectl patch deployment -n ingress-nginx nginx-ingress-controller --type='json' \
  --patch="$(curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/publish-service-patch.yaml)"
```

``` console
curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/azure/service.yaml \
    | kubectl apply -f -
```

If the ingress controller uses RBAC run:

``` console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/patch-service-with-rbac.yaml
```

If not run:

``` console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/patch-service-without-rbac.yaml
```

**Important Note:** proxy protocol is not supported in GCE/GKE

### Baremetal

Using [NodePort](https://kubernetes.io/docs/concepts/services-networking/service/#type-nodeport):

``` console
curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/provider/baremetal/service-nodeport.yaml \
    | kubectl apply -f -
```

Using Helm
----------

NGINX Ingress controller can be installed via [Helm](https://helm.sh/) using the chart [stable/nginx](https://github.com/kubernetes/charts/tree/master/stable/nginx-ingress) from the official charts repository.
To install the chart with the release name `my-nginx`:

``` console
helm install stable/nginx-ingress --name my-nginx
```

If the kubernetes cluster has RBAC enabled, then run:

``` console
helm install stable/nginx-ingress --name my-nginx --set rbac.create=true
```

Verify installation
-------------------

To check if the ingress controller pods have started, run the following command:

``` console
kubectl get pods --all-namespaces -l app=ingress-nginx --watch
```

Once the operator pods are running, you can cancel the above command by typing `Ctrl+C`.
Now, you are ready to create your first ingress.

Detect installed version
------------------------

To detect which version of the ingress controller is running, exec into the pod and run `nginx-ingress-controller version` command.

``` console
POD_NAMESPACE=ingress-nginx
POD_NAME=$(kubectl get pods -n $POD_NAMESPACE -l app=ingress-nginx -o jsonpath={.items[0].metadata.name})
kubectl exec -it $POD_NAME -n $POD_NAMESPACE -- /nginx-ingress-controller --version
```

Deploying the config-map
------------------------

A config map can be used to configure system components for the nginx-controller. In order to begin using a config-map
make sure it has been created and is being used in the deployment.

It is created as seen in the [Mandatory Commands](#mandatory-commands) section above.

``` console
curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/configmap.yaml \
    | kubectl apply -f -
```

and is setup to be used in the deployment [without-rbac](without-rbac.yaml) or [with-rbac](with-rbac.yaml) with the following line:

``` yaml
- --configmap=$(POD_NAMESPACE)/nginx-configuration
```

For information on using the config-map, see its [user-guide](../docs/user-guide/configmap.md).