Simple ingress from host with microk8s?

Question

I would like to do two things with MicroK8s:

1. Route the host machine (Ubuntu 18.04) ports 80/443 to Microk8s
2. Use something like the simple ingress defi

Answer 1

The statement "The best I've gotten so far is using MetalLB to create a load balancer." is wrong. You must to use the ingress layer for host traffic routing.

In a bare metal environment you need to configure MetalLB to allow incoming connections from the host to k8s.

First we need a test:

curl -H "Host: nginx.ioo" http://HOST_IP

What is the result?

1. Network error
2. Error 404 or 503
3. Works!!

If Network error then you need MetalLB

microk8s.enable metallb:$(curl ipinfo.io/ip)-$(curl ipinfo.io/ip) 

Run the test again.

If Network error then you have something wrong. Check host connectivity.

If error 404 (sometimes 503) then you need a ingress rule.

# ingress-service.yaml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-service
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
    - host: nginx.ioo
    - http:
        paths:
          - path: /
            backend:
              serviceName: nginx-cluster-ip-service
              servicePort: 80

Last test. It should work.

Now you can use ingress to route different domains to their respective pods inside the service.