Files
oikos/plans/2026-07-05-oikos-prometheus-lxc.md
dtoro 5c5016b3c7 docs: reshape runbooks into .agents/skills/<name>/SKILL.md (phase 4)
Problem: runbooks are agent-executable procedures but lived at the repo root,
separate from the other agent instruction now under .agents/.

Change:
- Move runbooks/<name>.md -> .agents/skills/<name>/SKILL.md (folder per skill,
  matching the wiki-hq skills layout). Frontmatter (name, risk_class, inputs,
  verification, docs_update_checklist, transition) preserved.
- Rewrite links (inbound from plans; between-skill siblings) via the move map.
- Update prose references in AGENTS.md, HERMES.md, .agents/OIKOS.md, and the
  operations schema; fix a pre-existing stale link to operations/commands.md.

No code consumed runbooks/ by path, so nothing else changes.

Verification: all SKILL.md frontmatter parses with valid risk_class; every
lifecycle transition resolves to an oikos/ontology.yaml state; broken-link
count 127 -> 126 (fixed one, introduced none).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-06 14:39:31 +02:00

3.4 KiB

Oikos metrics stack — Prometheus LXC (planned)

Lifecycle state: planned (see oikos/ontology.yaml lifecycle). No LXC exists yet — this is the plan doc that state requires before provisioning starts. Do not add a hosts: entry with a guessed pve_id until the LXC is actually created; Proxmox assigns the real ID at pct create time.

Why

Week-3 reliability layer (see OIKOS.md) wants trend signals — "disk full in ~9 days at current rate", temperature creep — which need a real time-series store. The scheduler (oikos/scheduler.py) currently does point-in-time threshold checks only; Prometheus is the one new piece of infrastructure the 30-day roadmap calls for.

Note: undocumented LXC 131 on hubris

Oikos's drift detector (oikos/drift.py) found pve_id 131 live on hubris (via pct list) with no inventory.yaml entry — created outside the provision-node runbook, identity unknown from this repo. Investigate what 131 is before assuming any pve_id is free; don't let Proxmox auto-assign into a range you haven't confirmed is actually unused end-to-end.

Plan

  • Host: hubris (per the earlier decision: new LXC, not co-located).
  • Role: metrics (Prometheus + local TSDB retention; no Grafana yet — the Week-4 Oikos Console renders its own sparklines from the Prometheus HTTP API, per the plan's Week-3 scope decision).
  • Networking: LAN + mesh-gated only, no public ingress (matches homelab_mcp/secrets_issuance's MESH_SUBNETS pattern) — Prometheus exposes host/service metadata that shouldn't be public.
  • Scrape targets: node_exporter on hubris and strong (Proxmox hosts)
    • any LXC the scheduler needs disk/temp trend data from beyond what pct/df already gives (start with hubris + strong only; expand only if a specific signal needs it).
  • Storage: local LXC rootfs is sufficient (metrics-only workload, short retention — no /mnt/library mount needed).

Provisioning steps (once pve_id is assigned)

Follow lifecycle-provision-node:

  1. pct create <new-id> ... on hubris — confirm the assigned ID doesn't collide with 131 or anything else live.
  2. homelab client add metrics (or the chosen name) with state: provisioning, stub containers/<id>-metrics.md.
  3. Install Prometheus + node_exporter (Debian package or binary release — decide at implementation time; no strong preference recorded here).
  4. Point node_exporter at hubris + strong (either install locally on each, or scrape via SSH-tunneled metrics — install locally is simpler and is the standard approach).
  5. Follow lifecycle-activate-node to flip to active, complete the doc page, regenerate hosts/*.yaml + infrastructure/topology.md.
  6. Extend oikos/scheduler.py's disk/temp probes to query Prometheus rate() instead of (or alongside) the current live SSH df probe, so drift/threshold Signals gain trend evidence ("full in ~9 days") instead of only a point-in-time percentage.

Open question for the operator

Package choice (apt prometheus vs upstream binary release) and exact scrape interval aren't decided here — pick at implementation time based on what's easiest to keep patched via the existing homelab apt-audit/ apt-upgrade fleet tooling if using the Debian package.