03-clouddns-setup.md

Cloud DNS setup

You will need an internet domain and access to the registrar to change the name servers to Google Cloud DNS.

Create a managed zone named istio in Cloud DNS (replace example.com with your domain):

gcloud dns managed-zones create \
--dns-name="example.com." \
--description="Istio zone" "istio"

Look up your zone's name servers:

gcloud dns managed-zones describe istio

Update your registrar's name server records with the records returned by the above command.

Wait for the name servers to change (replace example.com with your domain):

watch dig +short NS example.com

Create a static IP address named istio-gateway-ip in the same region as your GKE cluster:

gcloud compute addresses create istio-gateway-ip --region europe-west3

Find the static IP address:

gcloud compute addresses describe istio-gateway-ip --region europe-west3

Create the following DNS records (replace example.com with your domain and set your Istio Gateway IP):

DOMAIN="example.com"
GATEWAYIP="35.198.98.90"

gcloud dns record-sets transaction start --zone=istio

gcloud dns record-sets transaction add --zone=istio \
--name="${DOMAIN}" --ttl=300 --type=A ${GATEWAYIP}

gcloud dns record-sets transaction add --zone=istio \
--name="www.${DOMAIN}" --ttl=300 --type=A ${GATEWAYIP}

gcloud dns record-sets transaction add --zone=istio \
--name="*.${DOMAIN}" --ttl=300 --type=A ${GATEWAYIP}

gcloud dns record-sets transaction execute --zone istio

Verify that the wildcard DNS is working (replace example.com with your domain):

watch host test.example.com

Next: Install Istio with Helm