Configuring the Kubernetes cluster domain

Stackable operators allow the configuration of a non-default cluster domain as described in Customizing DNS Service (and more in DNS for Services and Pods).

The cluster domain can be configured using an environment variable KUBERNETES_CLUSTER_DOMAIN set on the operators. This environment variable can be configured via the helm values property kubernetesClusterDomain during the installation of the operators.

helm install <product>-operator stackable-stable/<product>-operator --set kubernetesClusterDomain="my.domain."

Note that if you specify a custom cluster domain we recommend adding a trailing dot (my.domain. instead of my.domain) to reduce DNS requests (see https://github.com/stackabletech/issues/issues/656 for details).

If the environment variable KUBERNETES_CLUSTER_DOMAIN (or the helm property kubernetesClusterDomain) are not set / overriden, the operator will default the cluster domain to cluster.local..