Configure DNS forwarding on an Azure Red Hat OpenShift 4 Cluster

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To configure DNS Forwarding on an Azure Red Hat OpenShift cluster, you'll need to modify the DNS operator. This modification allows the application pods running inside the cluster to resolve names hosted on a private DNS server outside the cluster. These steps are documented for OpenShift 4.6 here.

For example, if you want to forward all DNS requests for *.example.com to be resolved by a DNS server 192.168.100.10, edit the operator configuration by running:

oc edit dns.operator/default

This launches an editor sp you can replace spec: {} with:

spec:
  servers:
  - forwardPlugin:
      upstreams:
      - 192.168.100.10
    name: example-dns
    zones:
    - example.com

Save the file and exit your editor.

Next steps

Check out more information on DNS forwarding for OpenShift 4.6 here.