docker-restic-cron/scripts/start.sh
2021-06-14 17:01:52 -07:00

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#! /bin/bash
# If first arg is bash, we'll just execute directly
if [ "$1" == "bash" ]; then
exec "$@"
exit 0
fi
# If no env variable set, get from command line
if [ "$OPT_ARGUMENTS" == "" ]; then
export OPT_ARGUMENTS="$*"
fi
# Init the repo
restic -r "$BACKUP_DEST" snapshots || restic -r "$BACKUP_DEST" init
# If set to restore on start, restore if the data volume is empty
if [ "$RESTORE_ON_EMPTY_START" == "true" ] && [ -z "$(ls -A "$PATH_TO_BACKUP")" ]; then
/scripts/cron-exec.sh /scripts/restore.sh latest
fi
# Unless explicitly skipping, take a backup on startup
if [ "$SKIP_ON_START" != "true" ]; then
/scripts/cron-exec.sh /scripts/backup.sh
fi
if [ -n "$CRON_SCHEDULE" ]; then
# Export the environment to a file so it can be loaded from cron
env | sed 's/^\(.*\)=\(.*\)$/export \1="\2"/g' > /env.sh
# Remove some vars we don't want to keep
sed -i '/\(HOSTNAME\|affinity\|SHLVL\|PWD\)/d' /env.sh
# Use bash for cron
echo "SHELL=/bin/bash" > /crontab.conf
# Schedule the backups
echo "$CRON_SCHEDULE /cron-exec.sh /backup.sh" >> /crontab.conf
echo "Backups scheduled as $CRON_SCHEDULE"
if [ -n "$VERIFY_CRON_SCHEDULE" ]; then
echo "$VERIFY_CRON_SCHEDULE /cron-exec.sh /verify.sh" >> /crontab.conf
echo "Verify scheduled as $VERIFY_CRON_SCHEDULE"
fi
# Add to crontab
crontab /crontab.conf
# List crontabs
crontab -l
echo "Starting cron..."
crond
touch /cron.log
tail -f /cron.log
fi