👱🏻‍♀️ Monika: The iJUG's homebrewn Infrastructure Monitor

Monika is a Java-implemented RESTful Web Service serving as an agent for Uptime Kuma to read the local disk's free space.

Use

• Disk Free: /monika/status responds status 100 on hardware failures, status 901 if volume has less than 20% free, status 2XX in all other cases (where XX is the lowest free value in %). The status text contains the smallest free percentage of all monitored volumes. Example: 260 Smallest free volume is 60 %.
• Health Check: /monika/health responds status 204 always.

Administrate

• docker logs monika - Contains one entry for each monitored path per /status request, like:

  /home is 60 % free
  /var is 75 % free

Deploy

• docker run --name monika -d -e MONITORED_PATHS=/home:/var -e IP_PORT=8123 -P ghcr.io/ijug-ev/monika: Monika will listen to requests on port 8123 and monitor paths /home and /var.
  • MONITORED_PATH: Monika will monitor each path in this list. The default is /, i. e. only the root file system is monitored.
  • IP_PORT: Monika will listen to this IP port. The default is 8080.

Build

./build, i. e.:

#!/bin/bash
mvn clean package
cp src/main/docker/Dockerfile target
pushd ./target
docker build -t monika .
popd
docker run -it --rm -P monika