Session 0001: Ops Dashboard Core Fixes

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

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

Tags: #Session #OpsDashboard