greggd 1.0.10

Lightweight Linux, macOS, and Windows metrics daemon that exposes a read-only JSON API for the gregg client.
Documentation

greggd

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Lightweight Linux, macOS, and Windows metrics daemon for the gregg monitoring ecosystem.

Installation

cargo install greggd

Usage

Run the daemon directly in the foreground. On Unix, systemd and launchd are optional operator-managed deployment mechanisms; greggd does not invoke them.

greggd run
greggd run --config /path/to/greggd.toml

On Windows, native SCM lifecycle commands remain available:

greggd start
greggd stop
greggd restart

Ensure the daemon is running. croncheck is a watchdog for cron, Task Scheduler, and other supervisors without built-in readiness monitoring: it probes the configured local TCP port and, if nothing is listening, spawns greggd run as a detached child. The HTTP API is not consulted and no service manager is invoked.

greggd croncheck
greggd configprint
greggd version

On Windows, the service entry point is greggd service (internal, used by the SCM). Install/uninstall via the provided PowerShell scripts in packaging/.

Configuration

Default config path:

  • Linux: /etc/gregg/greggd.toml
  • macOS: /Library/Application Support/gregg/greggd.toml
  • Windows: %ProgramData%\gregg\greggd.toml

Override the default with --config PATH.

configprint is read-only and prints the configured bind address as a canonical socket address, with bind wildcards resolved to the host's primary local IP so the output is a usable address a remote client can dial. A specific configured host is preserved unchanged, and a wildcard is preserved verbatim if the local IP cannot be resolved. The output looks like 192.168.182.143:11310 or [fd00::10]:11310. The command does not probe the network, bind a listener, start, stop, or modify the daemon; wildcard resolution uses a transient UDP connect() that performs a local route lookup only and transmits no packets.

Network

This daemon is designed for private networks only. It exposes a read-only HTTP/1 JSON API on the configured port (default 11310) and is not hardened for public internet exposure. No firewall rules are created automatically. LAN exposure is operator-controlled and the daemon has no TLS or authentication.

/v2/status is the universal status endpoint and may include a bounded drives list of mounted local filesystem names with numeric used and total bytes. Missing or null drive data means unavailable/legacy; an empty list means successful enumeration with no eligible volumes. Collection is best-effort and does not model physical disks or storage topology. Linux and macOS retain /v1/status; Windows is v2-only for status semantics.

Links

License

MIT