Inconsistent environment variable naming: CLUSTER_DOMAIN should be FLAGD_CLUSTER_DOMAIN

[kuznero]

Problem

The CLUSTER_DOMAIN environment variable introduced in PR #789 does not follow the naming convention used by other flagd-related configuration options in the operator.

Current Behavior

The environment variable for configuring the Kubernetes cluster domain is named CLUSTER_DOMAIN, which is inconsistent with other flagd-related environment variables.

Expected Behavior

All flagd-related configuration options should follow a consistent naming pattern with the FLAGD_ prefix:

• FLAGD_PROXY_PORT
• FLAGD_PROXY_IMAGE
• FLAGD_PROXY_TAG
• FLAGD_CLUSTER_DOMAIN ← should follow this pattern

Impact

Inconsistent naming makes configuration more confusing and harder to discover. Users expect related options to share a common prefix for easier grouping and documentation.

Solution

Rename the environment variable from CLUSTER_DOMAIN to FLAGD_CLUSTER_DOMAIN in the envconfig.

Related

• PR fix(envconfig): rename CLUSTER_DOMAIN env var to FLAGD_CLUSTER_DOMAIN #792 fixes this issue
• PR feat: add configurable cluster domain support #789 introduced the original CLUSTER_DOMAIN configuration
• Issue Flagd-proxy mode assumes cluster.local #764 was the original request for configurable cluster domain support