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:

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

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RAP host-agent monitor

1.3 KiB

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