Observability
Jerboa exposes observability from the daemon, not the CLI.
Metrics
Enable with:
jerboad --metrics-addr :9090Endpoints:
/metrics/health
The repo currently exports daemon/VM/image/network counters and gauges, including:
- VM state gauges
- VM lifecycle counters
- image count
- active port-forward count
- bridge count
- daemon build info
- daemon start time
Tracing
Enable with:
jerboad --trace-addr localhost:4317The daemon emits VM lifecycle spans through OTLP gRPC.
Logging
Enable JSON logs with:
jerboad --log-format jsonThe daemon defaults to text logs.
Dashboard
Enable with:
jerboad --ui-addr :8080Routes:
/ui/ui/api/vms/ui/api/vm/{id}/ui/api/vm/{id}/logs/ui/api/vm/{id}/stats
VM Stats
CLI command:
jerboa stats <id>
jerboa stats <id> --watchLinux collects live process-backed stats. Non-Linux paths fall back to a zeroed fallback source.
Serial Log Retention
The daemon keeps an in-memory serial log buffer per VM.
Daemon flag:
jerboad --vm-log-max-bytes 83886080 keeps the built-in default of 4 MiB per VM.
jerboa logs -f follows the retained log buffer until the VM stops.
SQLite VM Store
Use:
jerboad --vm-store sqliteThe daemon migrates file-backed VM state into SQLite on first use.