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kube-lego with GCE ingress controller

With using GKE/GCE ingress controller you hand off the HTTP routing to GCE

This examples runs kube-lego in a separate namespace

Create the kube-lego related objects

# Namespace
kubectl apply -f lego/00-namespace.yaml
# ConfigMap (please setup you KUBE_LEGO EMAIL before deploying)
kubectl apply -f lego/configmap.yaml 
# RBAC objects
kubectl apply -f lego/service-account.yaml
kubectl apply -f lego/cluster-role.yaml
kubectl apply -f lego/cluster-role-binding.yaml
# Deployment
kubectl apply -f lego/deployment.yaml
# Service is created by kube-lego in every used namespace

Create an example application echoserver in a separate namespace

# Namespace
kubectl apply -f echoserver/00-namespace.yaml
# Service (has to be Type=NodePort)
kubectl apply -f echoserver/service.yaml
kubectl apply -f echoserver/deployment.yaml
kubectl apply -f echoserver/ingress-tls.yaml

As soon as the ingress/echoserver resource is added to the cluster, kube-lego will be aware of that and try to get a certificate for the domain echo.example.com specified in the ingress resource. Please be aware that you have to manually point the DNS record for echo.example.com to the load balancer created.

You get the right IP address by using kubectl. (It takes +/- 10 min to deloy the ingress if is the first load balancer you're deploying on gce.):

kubectl get ingress --namespace echoserver echoserver
NAME         HOSTS              ADDRESS          PORTS     AGE
echoserver   echo.example.com   130.211.31.209   80, 443   2m

Screenshot of GCE console

If you take a look at the load balancers in GCE it should look like that

GCE load balancers

💀 Warning!!! 💀

Be aware that gce has a limit of 5 backend services by default, read here how to increase your limits. Use the command below to verify if you're reaching the limits.

$kubectl get events -w --all-namespaces
echoserver   2017-05-10 19:32:39 +0200 CEST   2017-05-10 19:32:21 +0200 CEST   11        echoserver   Ingress             Warning   GCE :Quota   {loadbalancer-controller }   googleapi: Error 403: Quota 'BACKEND_SERVICES' exceeded. Limit: 5.0, quotaExceeded