icinga-satellite

An easy-to-use Dockerized Icinga2 satellite setup. It could be used as an Icinga2 agent aswell, but I don't think that would make much sense. The goal is instead to create an easy-to-deploy satellite image.

Tags and their respective Dockerfile

Main tags

Alpine tags (currently has some problems)

NOTE: Currently there are some problems with the Alpine image. Use the main images instead, tagged 0.n.

There are two available images for you to choose from. The main images (0.n) are based on Debian 10-slim from tag 0.5 and up. Previous to 0.5 they were based on Ubuntu 18.04. The main images uses Icinga2 from Icingas official repository.

The other images (0.n-alpine) are based on Alpine with Icinga2 from Alpines repository. From 0.1.1-alpine and up, the Alpine images are built on the latest Alpine image. Previous to 0.1.1 they were based on Alpine 3.11.

Environment variables

Everything is controlled using the following environment variables.

CN is the Common Name of the satellite
ZONE is the zone in which this satellite should be in. If no zone is specified it defaults to using the CN as the zone.
PARENTCN is the Common Name of the parent host, for example the master. If no PARENTCN is specified it defaults to using the PARENTHOST as a PARENTCN
PARENTHOST is the FQDN or IP of the parent host, for example the master.
PARENTPORT is the Icinga2 port on the parent host. Defaults to 5665.
TICKET is the ticket you get from the master (if you are using Director you find it under the Agent tab of the host).
TICKET_PATH is the path to the ticket secrets file if you use Swarm and wants to use secrets instead (to keep your ticket secure). The ticket should be on ONE line only and be created as an external secret. This variable is optional and only apply for Docker Swarm.
ACCEPT_CONFIG takes a y or n value for yes or no. The default is n
ACCEPT_COMMANDS takes a y or n value for yes or no. The default is n
DISABLE_CONFD takes a y or n value for yes or no. The default is y. This should be a sane default for most people.
LOCAL_TIMEZONE sets the local timezone of the satellite. For example Europe/Stockholm or America/New_York

Mounts

You need to mount /var/lib/icinga2 and /var/cache/icinga2 somewhere on your filesystem to preserve the state of the satellite between restarts. See the examples below.

Example usage

#> docker run -d --name my-icinga-sat \
  -p 5665:5665 \
  -e CN=icinga-sat02.local \
  -e PARENTHOST=icinga-master.local \
  -e PARENTCN=icinga-master.local \
  -e PARENTZONE=master \
  -e TICKET=124de0573705d1133db62a974aaf \
  -e DISABLE_CONFD=y -e ACCEPT_CONFIG=y -e ACCEPT_COMMANDS=y \ 
  -v /var/lib/icinga2:/var/lib/icinga2 \ 
  -v /var/cache/icinga2:/var/cache/icinga2 \ 
   jackbenny/icinga-satellite

docker-compose.yml example

version: "3.8"
services:
  my-icinga-sat:
    image: jackbenny/icinga-satellite
    ports:
      - 5665:5665
    restart:always
    environment:
      - CN=icinga-sat02.local
      - ZONE=icinga-sat02.local
      - PARENTHOST=icinga-master.local
      - PARENTCN=icinga-master.local
      - PARENTZONE=master
      - TICKET=124de0573705d1133db62a974aaf
      - ACCEPT_CONFIG=y
      - ACCEPT_COMMANDS=y
      - DISABLE_CONFD=y
      - LOCAL_TIMEZONE=Europe/Stockholm
    volumes:
      - /var/lib/icinga2:/var/lib/icinga2
      - /var/cache/icinga2:/var/cache/icinga2

docker-compose.yml example with Docker secrets

version: "3.8"
services:
  my-icinga-sat:
    image: jackbenny/icinga-satellite
    environment:
      - CN=icinga-sat02.local
      - PARENTHOST=icinga-master.local
      - PARENTZONE=master
      - TICKET_PATH=/var/run/secrets/ticket
      - ACCEPT_CONFIG=y
      - ACCEPT_COMMANDS=y
      - DISABLE_CONFD=y
      - LOCAL_TIMEZONE=Europe/Stockholm
    volumes:
      - /var/lib/icinga2:/var/lib/icinga2
      - /var/cache/icinga2:/var/cache/icinga2
    secrets:
      - ticket
secrets:
  ticket:
    external: true

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