The ingress-nginx module: examples

An example for AWS (Network Load Balancer)

When creating a balancer, all zones available in the cluster will be used.

In each zone, the balancer receives a public IP. If there is an instance with an Ingress controller in the zone, an A-record with the balancer’s IP address from this zone is automatically added to the balancer’s domain name.

When there are no instances with an Ingress controller in the zone, then the IP is automatically removed from the DNS.

If there is only one instance with an Ingress controller in a zone, when the pod is restarted, the IP address of the balancer of this zone will be temporarily excluded from DNS.

apiVersion: deckhouse.io/v1
kind: IngressNginxController
metadata:
 name: main
spec:
  ingressClass: "nginx"
  inlet: "LoadBalancer"
  loadBalancer:
    annotations:
      service.beta.kubernetes.io/aws-load-balancer-type: "nlb"

An example for GCP / Yandex Cloud / Azure

apiVersion: deckhouse.io/v1
kind: IngressNginxController
metadata:
 name: main
spec:
  ingressClass: "nginx"
  inlet: "LoadBalancer"

An example for OpenStack

apiVersion: deckhouse.io/v1
kind: IngressNginxController
metadata:
  name: main-lbwpp
spec:
  inlet: LoadBalancerWithProxyProtocol
  ingressClass: nginx
  loadBalancerWithProxyProtocol:
    annotations:
      loadbalancer.openstack.org/proxy-protocol: "true"
      loadbalancer.openstack.org/timeout-member-connect: "2000"

An example for Bare metal

apiVersion: deckhouse.io/v1
kind: IngressNginxController
metadata:
  name: main
spec:
  ingressClass: nginx
  inlet: HostWithFailover
  nodeSelector:
    node-role.deckhouse.io/frontend: ""
  tolerations:
  - effect: NoExecute
    key: dedicated.deckhouse.io
    value: frontend

An example for Bare metal (Behind external load balancer, e.g. Cloudflare, Qrator, Nginx+, Citrix ADC, Kemp, etc.)

apiVersion: deckhouse.io/v1
kind: IngressNginxController
metadata:
  name: main
spec:
  ingressClass: nginx
  inlet: HostPort
  hostPort:
    httpPort: 80
    httpsPort: 443
    behindL7Proxy: true

An example for Bare metal (MetalLB Load Balancer)

apiVersion: deckhouse.io/v1
kind: IngressNginxController
metadata:
  name: main
spec:
  ingressClass: nginx
  inlet: LoadBalancer
  nodeSelector:
    node-role.deckhouse.io/frontend: ""
  tolerations:
  - effect: NoExecute
    key: dedicated.deckhouse.io
    value: frontend

In the case of using MetalLB, its speaker Pods must be run on the same Nodes as the Ingress controller Pods.

The controller must receive real IP addresses of clients — therefore its Service is created with the parameter externalTrafficPolicy: Local (disabling cross–node SNAT), and to satisfy this parameter the MetalLB speaker announce this Service only from those Nodes where the target Pods are running.

So for the current example metallb module configuration should be like this:

metallb:
 speaker:
   nodeSelector:
     node-role.deckhouse.io/frontend: ""
   tolerations:
    - effect: NoExecute
      key: dedicated.deckhouse.io
      value: frontend

An example for Bare metal (with L2LoadBalancer)

1. Enable the l2-load-balancer module:

   apiVersion: deckhouse.io/v1alpha1
   kind: ModuleConfig
   metadata:
     name: l2-load-balancer
   spec:
     enabled: true
     version: 1
   

2. Deploy the L2LoadBalancer resource:

   apiVersion: network.deckhouse.io/v1alpha1
   kind: L2LoadBalancer
   metadata:
     name: ingress
   spec:
     addressPool:
     - 192.168.2.100-192.168.2.150
     nodeSelector:
       node-role.kubernetes.io/loadbalancer: ""
   

3. Deploy the IngressNginxController resource:

   apiVersion: deckhouse.io/v1
   kind: IngressNginxController
   metadata:
    name: main
   spec:
     ingressClass: nginx
     inlet: LoadBalancer
     loadBalancer:
       annotations:
         # The name of _L2LoadBalancer_ resource.
         network.deckhouse.io/l2-load-balancer-name: ingress
         # The number of addresses that will be allocated from the pool described in _L2LoadBalancer_.
         network.deckhouse.io/l2-load-balancer-external-ips-count: "3"
   

4. The platform will create a service with the type LoadBalancer, to which a specified number of addresses will be assigned:

   $ kubectl -n d8-ingress-nginx get svc
   NAME                   TYPE           CLUSTER-IP      EXTERNAL-IP                                 PORT(S)                      AGE
   main-load-balancer     LoadBalancer   10.222.130.11   192.168.2.100,192.168.2.101,192.168.2.102   80:30689/TCP,443:30668/TCP   11s