# Session 0001: Ops Dashboard Core Fixes

**Date:** 2026-02-22
**Status:** Completed
**Origin:** MDF Webseiten session 0024

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## Work Done

- [x] Removed load averages tile — replaced with Containers (running/total) + Processes tiles
- [x] Fixed Health Checks section — was broken inside Docker, now runs via nsenter bridge on host
- [x] Fixed Timers section — was broken (no systemd in container), now uses nsenter on host
- [x] Added `run_command_host()` to `ops_runner.py` for arbitrary host commands via nsenter
- [x] Rewrote timer parser — anchors on timestamp patterns instead of fragile column splitting
- [x] Fixed ops CLI health check — removed stale /opt/data2 reference, added [OK]/[FAIL] output format
- [x] Added Docker daemon running check to `ops health` (reports container count)

## Key Decisions / Learnings

- Dashboard container uses COPY (not volume mount) — requires `docker build` + recreate for changes to take effect
- nsenter bridge pattern for host commands: `docker run --rm --privileged --pid=host alpine nsenter -t 1 -m -u -i -n -p --`
- `ops health` must exit 0 always — returning issue count breaks callers using `set -euo pipefail`

## Files Changed

- `app/routers/system.py` — nsenter for health+timers, containers/processes tiles
- `app/ops_runner.py` — added `run_command_host()`
- `static/js/app.js` — replaced Load tile with Containers + Processes tiles

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**Tags:** #Session #OpsDashboard