docker-updater

#!/bin/bash
#
# Copyright 2016-2017  Martin Scharm
#
# This file is part of bf-docker-tools.
# <https://github.com/binfalse/docker-tools>
# <https://binfalse.de/2016/12/03/handy-docker-tools/>
# <https://binfalse.de/2017/01/24/automatically-update-docker-images/>
# <https://github.com/binfalse/docker-auto-update>
#
# bf-docker-tools is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# bf-docker-tools is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# bf-docker-tools. If not, see <http://www.gnu.org/licenses/>.




# The following setup can be modified in
# /etc/default/docker-updater
# do not modify this file.

# set to 1 to get some debugging output
DEBUG=0
# wouldn't update anything unless this is set to 1
ENABLED=0
# list of docker-compose configs
DCOMPOSE=/etc/docker-compose-auto-update.conf


# read configuration from settings file
[ -e "/etc/default/docker-updater" ] && source "/etc/default/docker-updater"


# check if updates are enabled
[ "$ENABLED" -eq 1 ] || exit 0


# update all docker images
if [ "$DEBUG" -eq 1 ]
then
	/usr/local/bin/dupdate
else
	/usr/local/bin/dupdate -s
fi


# update all docker compose scripts 
if [ -e "$DCOMPOSE" ]
then
	cat "$DCOMPOSE" | /bin/grep -v '^#' | \
	while read conf
	do
		if [ -e "$conf" ]
		then
			# docker-compose has problems with absolute paths...
			# so we need to change into the directory
			dir=$(dirname "$conf")
			compfile=$(basename "$conf")
			
			cd "$dir"
			
			# do the updating part
			if [ "$DEBUG" -eq 1 ]
			then
				echo "updating docker compose in "
				docker-compose -f "$compfile" up -d --remove-orphans 2>&1
			else
				docker-compose -f "$compfile" up -d --remove-orphans 2>&1 | /bin/grep -v up-to-date
			fi
			
		else
			# uhm.. that compose file doesn't exist?
			# we should tell the admin..
			echo "docker compose file $conf does not exist..."
		fi
	done
fi