Default streams

The Formant agent ingest several default telemetry streams, containing information about the host, agent, and ROS state (if applicable).

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Device page visualization of several of Formant's default streams

Stream alias

Stream name

Description

CPU

$.host.cpu

A numeric set stream with CPU utilization percentage and 1 minute load average.

Memory

$.host.memory

A numeric set stream with memory utilization percentage and remaining memory available.

Network

$.host.network

A numeric set stream with the total host transmit and receive rate, in Mbps.

Disk

$.host.disk

A numeric set stream with

Location

$.host.geoip

An approximate location stream based on a geoIP lookup of the host.

Agent Buffer

$.agent.buffer

A numeric set stream with the percent utilization of each of the four agent telemetry data buffers.

Health

$.agent.health

A health stream indicating that an agent is online.

N/A

$.ros.node_online

A bitset indicating all online ROS nodes. Will only populate if a roscore is running on the host and accessible by the Formant agent.


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