legaetx_exporter

Legamaster ETX as PJLink Exporter for Prometheus.

This exporter uses the RS-232 specifications according to Legamaster ETX usermanual.

For compatibility reason, it respond with the same values as the pjlink_exporter.

Legamaster ETX does not support status-querys and control via network yet. So you require a RS-232 to ethernet TCP-server. Default telnet-listening port is 4001.

Usage

./legaetx_exporter

Visit http://localhost:2115/pjlink?target=terminalserver.localnetwork where mybeamername.localnetwork is the IP or DNS-Name of the your Display to get metrics from.

Installation

Clone this repository from github to your go directory. Within this repository run:

make build

Copy build to your /usr/local/bin

cp legatex_exporter /usr/local/bin

Change permissions

chown prometheus:prometheus /usr/local/bin/legaetx_exporter

Setup exporter as daemon

cp init.d.legaetx_exporter /etc/init.d/legaetx_exporter
chmod +x /etc/init.d/legaetx_exporter
update-rc.d legaetx_exporter defaults

vim /etc/default/legaetx_exporter
START=yes

Prometheus Configuration

The pjlink exporter needs to be passed the address as a parameter, this can be done with relabelling.

Example config:

scrape_configs:
  - job_name: 'legaetx'
    static_configs:
      - targets:
        - my-fancy-display1.localnetwork  # Legamaster ETX device.
    metrics_path: /pjlink
    params:
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: 127.0.0.1:2115  # The Legamaster ETX exporter's real hostname:port.

Contributions

Thanks to https://github.com/prometheus/snmp_exporter. This project was used as example and for inspriration while realizing this exporter.