76 lines
2.6 KiB
Bash
Executable File
76 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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# _____ _ _
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# | __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
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# | __| _| -_| -_| . | . | | . | . | | -_|
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# |__| |_| |___|___|___|___|_|_|_|___|___|_|_|___|
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#
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# Freedom in the Cloud
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#
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# Watchdog functions to keep systems running even if they crash
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# systemd itself can handle this, but some debian packages are in
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# twilight world where they still use the older init scripts
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#
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# License
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# =======
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#
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# Copyright (C) 2014-2018 Bob Mottram <bob@freedombone.net>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# name of a script which keeps running processes going even if they crash
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WATCHDOG_SCRIPT_NAME="keepon"
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function install_watchdog_script {
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if [[ $(is_completed "${FUNCNAME[0]}") == "1" ]]; then
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return
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fi
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{ echo '#!/bin/bash';
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echo 'LOGFILE=/var/log/keepon.log';
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echo "CURRENT_DATE=\$(date)"; } > "/usr/bin/$WATCHDOG_SCRIPT_NAME"
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# application specific stuff is added later
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chmod +x /usr/bin/$WATCHDOG_SCRIPT_NAME
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function_check cron_add_mins
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cron_add_mins 1 "/usr/bin/$WATCHDOG_SCRIPT_NAME"
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mark_completed "${FUNCNAME[0]}"
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}
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function daemon_is_running {
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daemon_name="$1"
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systemctl is-active "${daemon_name}" >/dev/null 2>&1 && echo Running
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}
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function add_watchdog_daemon {
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daemon_name="$1"
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{ echo '';
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echo "# keep ${daemon_name} daemon running";
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echo "RUNNING=\$(systemctl is-active ${daemon_name} >/dev/null 2>&1 && echo Running)";
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echo "if [ ! \$RUNNING ]; then";
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echo " systemctl start ${daemon_name}";
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echo " echo -n \$CURRENT_DATE >> \$LOGFILE";
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echo " echo \"${daemon_name} daemon restarted\" >> \$LOGFILE";
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echo 'fi';
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echo "# End of ${daemon_name}"; } >> "/usr/bin/$WATCHDOG_SCRIPT_NAME"
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}
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function remove_watchdog_daemon {
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daemon_name="$1"
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sed -i "/# keep ${daemon_name} daemon running/,/# End of ${daemon_name}/d" "/usr/bin/$WATCHDOG_SCRIPT_NAME"
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}
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# NOTE: deliberately no exit 0
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