read-only signals
- systemctl status
- journalctl -p err
- df · ss
- deploy log
scenario 01 / 04 Application across hosts
One app, several hosts, one root cause
- Incident
- Monitoring files a latency spike on the checkout path. The app spans web-01, app-02 and db-03.
- Evidence
- Through your gateway, read-only diagnostics pull service status, recent errors, resource pressure and the last deploy from each host, then correlate them onto one timeline.
- Proposal & approved fix
- You get a single proposal: a worker left stuck on app-02 by the 14:02 rollout, evidence attached and confidence scored. You approve, an allowlisted restart runs on app-02, and a verification pass confirms the path recovered.