[Unit]
Description=Minecraft server based on Thermos
Requires=docker.service
After=docker.service

[Service]
Type=idle
Restart=always
RestartSec=15

# Setup desired name and image
Environment=CONTAINER_NAME=thermos
Environment=CONTAINER_IMAGE=aranokai/openjdk-minecraft_thermos:latest

ExecStartPre=-/usr/bin/docker kill ${CONTAINER_NAME}
ExecStartPre=-/usr/bin/docker rm -f ${CONTAINER_NAME}
# Get fresh image
ExecStartPre=-/usr/bin/docker pull ${CONTAINER_IMAGE}
# Will fail, if data container already exists, so ignoring...
ExecStartPre=-/usr/bin/docker create --name ${CONTAINER_NAME}-data ${CONTAINER_IMAGE}
# Fix posible divergence in the permissions
ExecStartPre=/usr/bin/docker run --rm --volumes-from ${CONTAINER_NAME}-data --user root --entrypoint sh ${CONTAINER_IMAGE} -c 'chown -R $${THERMOS_USR}.$${THERMOS_USR} $${THERMOS_WORKDIR}'

# Run with data container attached
#NOTE: need to spawn console ('-t'), otherwise tmux will fail
ExecStart=/usr/bin/docker run -t --name ${CONTAINER_NAME} -p 25565:25565/tcp --volumes-from ${CONTAINER_NAME}-data ${CONTAINER_IMAGE}

ExecStop=/usr/bin/docker stop --time 30 ${CONTAINER_NAME}

[Install]
WantedBy=multi-user.target