Docker Monitoring with Icinga2 (through Icinga2 API)

Description

This docker container read the docker.sock and can check the state of a container and also state of a process (define in labels var).

Variables for container

Path to docker.sock file (bind in docker container (-v /var/run/docker.sock:/docker.sock)

DOCKERSOCK=/docker.sock

IP or DNS Name of Icinga2 Server

MONITORING_API_URL=monitorint.server.local

API User of Icinga2 Server

MONITORING_API_USER=root

API User Pass of Icinga2 Server

MONITORING_API_PASS=PASS

API Port of Icinga2 Server

MONITORING_API_PORT=5665

Name of docker host (this will be written in icinga2 conf as a custom vars)

DOCKERSERVERNAME=superdocker

Host template of icinga2 configuration

TEMPLATEHOST=passive-host

Service template of Icinga2 configuration

TEMPLATESERVICE=passive-service

Hostgroup in Icinga2 Server

HOSTGROUP=adito

Servicegroup in Icinga2 Server

SERVICEGROUP=adito

Time to resend notification

LOOPTIME=2m

Enable Debug

DEBUGNODE=true

docker-compose.yml

icinga2mon:
  image: adito/docker-monitoring
  hostname: icinga2-monitoring
  environment:
    - DOCKERSOCK=/docker.sock
    - MONITORING_API_URL=monitorint.server.local
    - MONITORING_API_USER=root
    - MONITORING_API_PASS=PASS
    - MONITORING_API_PORT=5665
    - DOCKERSERVERNAME=superdocker
    - TEMPLATEHOST=passive-host
    - TEMPLATESERVICE=passive-service
    - HOSTGROUP=adito
    - SERVICEGROUP=adito
    - LOOPTIME=2m
  volumes:
    - /var/run/docker.sock:/docker.sock
  restart: always

Container configuration

If you will not monitor a container, then add the label "monitoring=false" If you will monitor processes in container you need to define for this a label "processes: '["apache2", "mysqld", "python","vi"]'"

in docker-compose.yml

nginx1:
  image: nginx
  hostname: proxyhosting
  ports:
   - "192.168.42.74:9295:80"
  labels:
    monitoring: "true"
    processes: '["nginx"]'
  volumes:
   - /etc/localtime:/etc/localtime:ro
  restart: always

We've already created a icinga2 container, you can use it with this container.