Icinga2 Docker-Compose

docker-compose.yml

version: '2'
services:

  mysql:
    image: mariadb
    restart: unless-stopped
    environment:
      MYSQL_ROOT_PASSWORD: ${MYSQL_PASS}
    volumes:
      - "./mysql:/var/lib/mysql"

  icinga2:
    image: psitrax/icinga2
    hostname: icinga2 # for API Certs
    restart: unless-stopped
    depends_on:
      - mysql
    environment:
      TIMEZONE: ${TIMEZONE}
      MYSQL_HOST: ${MYSQL_HOST}
      MYSQL_PORT: ${MYSQL_PORT}
      MYSQL_USER: ${MYSQL_USER}
      MYSQL_PASS: ${MYSQL_PASS}
      MYSQL_DB: ${MYSQL_DB}
      MYSQL_AUTOCONF: ${MYSQL_AUTOCONF}
      ICINGA_API_PASS: ${ICINGA_API_PASS}
      ICINGA_LOGLEVEL: ${ICINGA_LOGLEVEL}
      ICINGA_FEATURES: ${ICINGA_FEATURES}
    volumes:
      - "./icinga2:/icinga2"

  icingaweb2:
    image: psitrax/icingaweb2
    restart: unless-stopped
    depends_on:
      - mysql
      - icinga2
    environment:
      TIMEZONE: ${TIMEZONE}
      MYSQL_AUTOCONF: ${MYSQL_AUTOCONF}
      IDO_DB_HOST: ${MYSQL_HOST}
      IDO_DB_PORT: ${MYSQL_PORT}
      IDO_DB_USER: ${MYSQL_USER}
      IDO_DB_PASS: ${MYSQL_PASS}
      IDO_DB: ${MYSQL_DB}
      WEB_DB_HOST: ${MYSQL_HOST}
      WEB_DB_PORT: ${MYSQL_PORT}
      WEB_DB_USER: ${MYSQL_USER}
      WEB_DB_PASS: ${MYSQL_PASS}
      WEB_DB: ${WEB_DB}
      ICINGA_API_PASS: ${ICINGA_API_PASS}
    ports:
      - "8080:80"
    volumes:
      - "./icingaweb2:/etc/icingaweb2"

Requiring hostname: icinga2 can cause problems when trying to send mail: mail is often rejected if it's sent from a hostname that doesn't correspond to the host's IP. It would be much nicer if an arbitrary hostname could be used.