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kubespray/docs/ingress_controller/ingress_nginx.md

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Installation Guide

Contents

Prerequisite Generic Deployment Command

!!! 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 different paths for the same host, the ingress controller will merge the definitions.

!!! attention If you're using GKE you need to 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)

The following Mandatory Command is required for all deployments except for AWS. See below for the AWS version.

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.10.1/deploy/static/provider/cloud/deploy.yaml

Provider Specific Steps

There are cloud provider specific yaml files.

Docker for Mac

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

First you need to enable kubernetes.

Then you have to create a service:

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

minikube

For standard usage:

minikube addons enable ingress

For development:

  1. Disable the ingress addon:
minikube addons disable ingress
  1. Execute make dev-env
  2. Confirm the nginx-ingress-controller deployment exists:
$ 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. Since Kubernetes v1.9.0 it is possible to use a classic load balancer (ELB) or network load balancer (NLB) Please check the elastic load balancing AWS details page

Elastic Load Balancer - ELB

This setup requires to choose in which layer (L4 or L7) we want to configure the Load Balancer:

  • Layer 4: Use an Network Load Balancer (NLB) with TCP as the listener protocol for ports 80 and 443.
  • Layer 7: Use an Elastic Load Balancer (ELB) with HTTP as the listener protocol for port 80 and terminate TLS in the ELB

For L4:

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/provider/aws/deploy.yaml

For L7:

Change the value of service.beta.kubernetes.io/aws-load-balancer-ssl-cert in the file provider/aws/deploy-tls-termination.yaml replacing the dummy id with a valid one. The dummy value is "arn:aws:acm:us-west-2:XXXXXXXX:certificate/XXXXXX-XXXXXXX-XXXXXXX-XXXXXXXX"

Check that no change is necessary with regards to the ELB idle timeout. In some scenarios, users may want to modify the ELB idle timeout, so please check the ELB Idle Timeouts section for additional information. If a change is required, users will need to update the value of service.beta.kubernetes.io/aws-load-balancer-connection-idle-timeout in provider/aws/deploy-tls-termination.yaml

Then execute:

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/provider/aws/deploy-tls-termination.yaml

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

Listeners

ELB Idle Timeouts

In some scenarios users will need to modify the value of the ELB 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 ELB idle timeout will work for most scenarios, unless the NGINX keepalive_timeout has been modified, in which case service.beta.kubernetes.io/aws-load-balancer-connection-idle-timeout will need to be modified to ensure it is less than the keepalive_timeout the user has configured.

Please Note: An idle timeout of 3600s is recommended when using WebSockets.

More information with regards to idle timeouts for your Load Balancer can be found in the official AWS documentation.

Network Load Balancer (NLB)

This type of load balancer is supported since v1.10.0 as an ALPHA feature.

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/provider/aws/service-nlb.yaml

GCE-GKE

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

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

Azure

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

Bare-metal

Using NodePort:

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

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

Verify installation

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

kubectl get pods --all-namespaces -l app.kubernetes.io/name=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.

POD_NAMESPACE=ingress-nginx
POD_NAME=$(kubectl get pods -n $POD_NAMESPACE -l app.kubernetes.io/component=controller -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 ingress-nginx/ingress-nginx. Official documentation is here

To install the chart with the release name my-nginx:

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