# RAP host-agent monitor

`rap-host-agent monitor-loop` is the local watchdog that runs near a node host.
It complements the update loop:

- starts watched Docker containers when they are stopped;
- restarts watched containers when Docker health is `unhealthy`;
- restarts containers stuck in `restarting` longer than the stale threshold;
- rate-limits repeated remediation with a restart cooldown;
- watches disk pressure and runs safe cleanup when the cleanup threshold is reached;
- removes old `/tmp/rap-*` and `/tmp/go-build*` build directories;
- writes an optional JSON status file;
- reports monitor status to the control plane through the node update-status channel.

Example:

```bash
rap-host-agent monitor-loop \
  --backend-url http://127.0.0.1:18121/api/v1 \
  --cluster-id cfc0743d-d960-49fb-9de8-96e063d5e4aa \
  --node-id 108a0d66-d65e-4dea-b9a8-135366bf7dba \
  --current-version 0.2.261-vpnfarm \
  --interval-seconds 60 \
  --disk-warn-percent 80 \
  --disk-cleanup-percent 85 \
  --disk-critical-percent 95 \
  --status-file /tmp/rap-web-admin/html/downloads/ops/host-monitor-status.json \
  --watch-container rap_test_postgres \
  --watch-container rap_test_redis \
  --watch-container rap_test_backend
```

On the shared test Docker host the current public status file is:

`http://docker-test.cin.su:18080/downloads/ops/host-monitor-status.json`