# Installation Guide - NGINX Ingress Controller

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# 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.

Danger

The admission webhook require conectivity between Kubernetes API server and the ingress controller.

In case Network policies or additional firewalls, please allow access to port `8443`.

Attention

The first time the ingress controller starts, two Jobs create the SSL Certificate used by the admission webhook. For this reason, there is an initial delay of up to two minutes until it is possible to create and validate Ingress definitions.

You can wait until is ready to running the next command:

    kubectl wait --namespace ingress-nginx \
      --for=condition=ready pod \
      --selector=app.kubernetes.io/component=controller \
      --timeout=120s

## Contents

- Provider Specific Steps
- Docker for Mac
- minikube
- AWS
- GCE - GKE
- Azure
- Digital Ocean
- Bare-metal
- Verify installation
- Detect installed version
- Using Helm

### Provider Specific Steps

#### Docker for Mac

Kubernetes is available in Docker for Mac (from version 18.06.0-ce)

    kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.32.0/deploy/static/provider/cloud/deploy.yaml

#### minikube

For standard usage:

    minikube addons enable ingress

For development:

- Disable the ingress addon:

    minikube addons disable ingress

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

    $ kubectl get pods -n ingress-nginx
    NAME                                       READY     STATUS    RESTARTS   AGE
    ingress-nginx-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)

    kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.32.0/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

    wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.32.0/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:

    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 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 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`.

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

#### GCE-GKE

Info

Initialize your user as a cluster-admin with the following command:

    kubectl create clusterrolebinding cluster-admin-binding \
      --clusterrole cluster-admin \
      --user $(gcloud config get-value account)

Danger

For private clusters, you will need to either add an additional firewall rule that allows master nodes access port `8443/tcp` on worker nodes, or change the existing rule that allows access to ports `80/tcp`, `443/tcp` and `10254/tcp` to also allow access to port `8443/tcp`.

See the GKE documentation on adding rules and the Kubernetes issue for more detail.

    kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.32.0/deploy/static/provider/cloud/deploy.yaml

Failure

Proxy protocol is not supported in GCE/GKE

#### Azure

    kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.32.0/deploy/static/provider/cloud/deploy.yaml

#### Digital Ocean

    kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.32.0/deploy/static/provider/do/deploy.yaml

#### Bare-metal

Using NodePort:

    kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-0.32.0/deploy/static/provider/baremetal/deploy.yaml

Tip

For extended notes regarding deployments on bare-metal, see Bare-metal considerations.

### Verify installation

Info

In minikube the ingress addon is installed in the namespace kube-system instead of ingress-nginx

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

    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.

    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 using the chart from the project repository. To install the chart with the release name `ingress-nginx`:

    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 then specify release name using `--name` flag

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

## Detect installed version:

    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