# Installation Guide

!!! attention
    The default configuration watches Ingress object from **all the namespaces**.

    To change this behavior use the flag `--watch-namespace` to limit the scope to a particular namespace.

!!! warning
    If multiple Ingresses define paths for the same host, the ingress controller **merges the definitions**.

## Contents

- [Provider Specific Steps](#provider-specific-steps)
  - [Docker for Mac](#docker-for-mac)
  - [minikube](#minikube)
  - [AWS](#aws)
  - [GCE - GKE](#gce-gke)
  - [Azure](#azure)
  - [Bare-metal](#bare-metal)
  - [Verify installation](#verify-installation)
  - [Detect installed version](#detect-installed-version)
- [Using Helm](#using-helm)

### Provider Specific Steps

#### Docker for Mac

Kubernetes is available in Docker for Mac (from [version 18.06.0-ce](https://docs.docker.com/docker-for-mac/release-notes/#stable-releases-of-2018))

[enable]: https://docs.docker.com/docker-for-mac/#kubernetes

```console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.31.1/deploy/static/provider/cloud/deploy.yaml
```

#### minikube

For standard usage:

```console
minikube addons enable ingress
```

For development:

- Disable the ingress addon:

```console
minikube addons disable ingress
```

- Execute `make dev-env`
- Confirm the `nginx-ingress-controller` deployment exists:

```console
$ kubectl get pods -n ingress-nginx
NAME                                       READY     STATUS    RESTARTS   AGE
nginx-ingress-controller-fdcdcd6dd-vvpgs   1/1       Running   0          11s
```

#### AWS

In AWS we use a Network load balancer (NLB) to expose the NGINX Ingress controller behind a Service of `Type=LoadBalancer`.

##### Network Load Balancer (NLB)

```console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.31.1/deploy/static/provider/aws/deploy.yaml
```

##### TLS termination in AWS Load Balancer (ELB)

In some scenarios is required to terminate TLS in the Load Balancer and not in the ingress controller.

For this purpose we provide a template:

- Download [deploy-tls-termination.yaml](https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.31.1/deploy/static/provider/aws/deploy-tls-termination.yaml)

```console
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.31.1/deploy/static/provider/aws/deploy-tls-termination.yaml
```

- Edit the file and change:

  - VPC CIDR in use for the Kubernetes cluster:

  `proxy-real-ip-cidr: XXX.XXX.XXX/XX`

  - AWS Certificate Manager (ACM) ID

  `arn:aws:acm:us-west-2:XXXXXXXX:certificate/XXXXXX-XXXXXXX-XXXXXXX-XXXXXXXX`

- Deploy the manifest:

```console
kubectl apply -f deploy-tls-termination.yaml
```

##### NLB Idle Timeouts

In some scenarios users will need to modify the value of the NLB idle timeout. Users need to ensure the idle timeout is less than the [keepalive_timeout](http://nginx.org/en/docs/http/ngx_http_core_module.html#keepalive_timeout) that is configured for NGINX.
By default NGINX `keepalive_timeout` is set to `75s`.

The default NLB idle timeout works for most scenarios, unless the NGINX [keepalive_timeout](http://nginx.org/en/docs/http/ngx_http_core_module.html#keepalive_timeout) has been modified, in which case the annotation

`service.beta.kubernetes.io/aws-load-balancer-connection-idle-timeout` value must be modified to ensure it is less than the configured `keepalive_timeout`.

!!! note ""
    An idle timeout of `3600` is recommended when using WebSockets

More information with regards to timeouts for can be found in the [official AWS documentation](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/network-load-balancers.html#connection-idle-timeout)

#### GCE-GKE

!!! info
    Initialize your user as a cluster-admin with the following command:
    ```console
    kubectl create clusterrolebinding cluster-admin-binding \
      --clusterrole cluster-admin \
      --user $(gcloud config get-value account)
    ```

```console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.31.1/deploy/static/provider/cloud/deploy.yaml
```

!!! warning Important
    Proxy protocol is not supported in GCE/GKE

#### Azure

```console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.31.1/deploy/static/provider/cloud/deploy.yaml
```

#### Bare-metal

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

```console
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.31.1/deploy/static/provider/baremetal/deploy.yaml
```

!!! tip
    For extended notes regarding deployments on bare-metal, see [Bare-metal considerations](./baremetal.md).

### Verify installation

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

```console
kubectl get pods -n ingress-nginx \
  -l app.kubernetes.io/name=ingress-nginx --watch
```

Once the ingress controller pods are running, you can cancel the command 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.kubernetes.io/name=ingress-nginx -o jsonpath='{.items[0].metadata.name}')

kubectl exec -it $POD_NAME -n $POD_NAMESPACE -- /nginx-ingress-controller --version
```

## Using Helm

NGINX Ingress controller can be installed via [Helm](https://helm.sh/) using the chart from the project repository.
To install the chart with the release name `ingress-nginx`:

```console
helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm install my-release ingress-nginx/ingress-nginx
```

If you are using [Helm 2](https://v2.helm.sh/) then specify release name using `--name` flag

```console
helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx/
helm install --name ingress-nginx ingress-nginx/ingress-nginx
```

## Detect installed version:

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