73 lines
2.7 KiB
Bash
Executable File
73 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# .---. . .
|
|
# | | |
|
|
# |--- .--. .-. .-. .-.| .-. .--.--. |.-. .-. .--. .-.
|
|
# | | (.-' (.-' ( | ( )| | | | )( )| | (.-'
|
|
# ' ' --' --' -' - -' ' ' -' -' -' ' - --'
|
|
#
|
|
# Freedom in the Cloud
|
|
#
|
|
# Watchdog functions to keep systems running even if they crash
|
|
# systemd itself can handle this, but some debian packages are in
|
|
# twilight world where they still use the older init scripts
|
|
#
|
|
# License
|
|
# =======
|
|
#
|
|
# Copyright (C) 2014-2016 Bob Mottram <bob@robotics.uk.to>
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Affero General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program 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 Affero General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
# name of a script which keeps running processes going even if they crash
|
|
WATCHDOG_SCRIPT_NAME="keepon"
|
|
|
|
function install_watchdog_script {
|
|
if [[ $(is_completed $FUNCNAME) == "1" ]]; then
|
|
return
|
|
fi
|
|
echo '#!/bin/bash' > /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
echo 'LOGFILE=/var/log/keepon.log' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
echo 'CURRENT_DATE=$(date)' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
# application specific stuff is added later
|
|
chmod +x /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
|
|
function_check cron_add_mins
|
|
cron_add_mins 1 "/usr/bin/$WATCHDOG_SCRIPT_NAME"
|
|
|
|
mark_completed $FUNCNAME
|
|
}
|
|
|
|
function add_watchdog_daemon {
|
|
daemon_name=$1
|
|
|
|
echo '' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
echo "# keep ${daemon_name} daemon running" >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
echo "RUNNING=$(pgrep ${daemon_name} > /dev/null && echo Running)" >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
echo 'if [ ! $RUNNING ]; then' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
echo " systemctl start ${daemon_name}" >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
echo ' echo -n $CURRENT_DATE >> $LOGFILE' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
echo " echo \"${daemon_name} daemon restarted\" >> \$LOGFILE" >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
echo 'fi' >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
echo "# End of ${daemon_name}" >> /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
}
|
|
|
|
function remove_watchdog_daemon {
|
|
daemon_name=$1
|
|
|
|
sed -i "/# keep ${daemon_name} daemon running/,/# End of ${daemon_name}/d" /usr/bin/$WATCHDOG_SCRIPT_NAME
|
|
}
|
|
|
|
# NOTE: deliberately no exit 0
|