René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Move namespace.cozystack.io/host from namespace label to annotation","articleBody":"## Problem\n\nThe `namespace.cozystack.io/host` label on tenant namespaces concatenates the tenant name with the root domain:\n\n```yaml\nlabels:\n  namespace.cozystack.io/host: \"mytenantname.cozystack.example.com\"\n```\n\nKubernetes label values are limited to 63 characters. With typical domain names (e.g., `cozystack.example.com` = 21 chars), tenant names are effectively limited to ~41 characters before hitting this limit.\n\n## Analysis\n\nUnlike other `namespace.cozystack.io/*` labels (etcd, ingress, monitoring, seaweedfs) which are used in network policy selectors, the `/host` label appears to be informational only:\n\n- **Defined in**: `packages/apps/tenant/templates/namespace.yaml:60`\n- **Used as selector**: No - grep shows no label selector references\n- **Purpose**: Stores the computed host for the tenant namespace\n\n## Proposed Solution\n\nMove `namespace.cozystack.io/host` from labels to annotations:\n\n```yaml\n# Before (label)\nlabels:\n  namespace.cozystack.io/host: \"mytenantname.cozystack.example.com\"\n\n# After (annotation)  \nannotations:\n  namespace.cozystack.io/host: \"mytenantname.cozystack.example.com\"\n```\n\nAnnotations don't have the 63-character value limit, so this removes one constraint on tenant name length.\n\n## Impact\n\n- Low risk: The label is not used for selection anywhere\n- The value is also stored in `cozystack-values` Secret, so consumers likely read it from there\n- Reduces effective tenant name restrictions\n\n## Affected Files\n\n- `packages/apps/tenant/templates/namespace.yaml`","author":{"url":"https://github.com/lllamnyp","@type":"Person","name":"lllamnyp"},"datePublished":"2026-02-09T12:37:13.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/2002/cozystack/issues/2002"}