estafette-google-cloud-dns

This small Kubernetes application configures dns in Google Cloud DNS for any service or ingress with the correct annotations

Why?

In order not to have to set dns records manually or from deployment scripts this application decouples that responsibility and moves it into the Kubernetes cluster itself.

Installation

Prepare using Helm:

brew install kubernetes-helm
kubectl -n kube-system create serviceaccount tiller
kubectl create clusterrolebinding tiller --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
helm init --service-account tiller --wait

Then install or upgrade with Helm:

helm repo add estafette https://helm.estafette.io
helm upgrade --install estafette-google-cloud-dns --namespace estafette estafette/estafette-google-cloud-dns

IAM

Award the following role to the automatically generated service account in the project specified by GOOGLE_CLOUD_DNS_PROJECT:

• DNS Administrator

Once it's running put the following annotations on a service of type LoadBalancer and deploy. The estafette-goole-cloud-dns application will watch changes to services and process those. Once approximately every 300 seconds it also scans all services as a safety net.

apiVersion: v1
kind: Service
metadata:
  name: myapplication
  namespace: mynamespace
  labels:
    app: myapplication
  annotations:
    estafette.io/google-cloud-dns: "true"
    estafette.io/google-cloud-dns-hostnames: "mynamespace.mydomain.com"
spec:
  type: LoadBalancer
  ports:
  - name: http
    port: 80
    targetPort: http
    protocol: TCP
  selector:
    app: myapplication