Subscription channel for Red Hat Advanced Cluster Management operator

OpenShift Cluster Domain

This parameter defines the base domain name used for all cluster-related DNS records. It is a fundamental setting that affects how cluster components communicate and how external users access cluster services.

This domain will be used by the OpenShift installer to configure cluster networking and generate TLS certificates.

Requirements

• Must be a valid domain name that you control
• DNS zone must be properly configured to delegate the subdomain to the cluster
• Must be unique if running multiple clusters in the same network

Usage

The cluster domain is used to construct FQDNs for various cluster services:

# Default domain: k8s.local

# Results in endpoints like:
api.clustername.k8s.local         # Kubernetes API
*.apps.clustername.k8s.local      # Application routes
api-int.clustername.k8s.local     # Internal API endpoint