Add a shared `homelab.host` module that provides host metadata for
multiple consumers:
- tier: deployment tier (test/prod) for future homelab-deploy service
- priority: alerting priority (high/low) for Prometheus label filtering
- role: primary role of the host (dns, database, monitoring, etc.)
- labels: free-form labels for additional metadata
Host configurations updated with appropriate values:
- ns1, ns2: role=dns with dns_role labels
- nix-cache01: priority=low, role=build-host
- vault01: role=vault
- jump: role=bastion
- template, template2, testvm01, vaulttest01: tier=test, priority=low
The module is now imported via commonModules in flake.nix, making it
available to all hosts including minimal configurations like template2.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add plan for NATS-based deployment service (homelab-deploy) that enables
on-demand NixOS configuration updates via messaging. Features tiered
permissions (test/prod) enforced at NATS layer.
Update prometheus-scrape-target-labels plan to share the homelab.host
module for host metadata (tier, priority, role, labels) - single source
of truth for both deployment tiers and prometheus labels.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add proposed dns_role label to distinguish primary/secondary DNS
resolvers. This addresses the unbound_low_cache_hit_ratio alert
firing on ns2, which has a cold cache due to low traffic.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
