openshift-redis-backup.sh

#!/bin/bash
#
## OpenShift redis backup script
## usage
## Edit openshift ID and backup directory to reflect your setup
## Install cron cartridge and place this script in the appropriate cron directory for your needs (daily, hourly, etc.)


openshift_id="your_openshift_id"

backup_dir="app-root/repo/redis-cron-backup"

backup_filename="redis-dump.$(date +%Y%m%d%H%M).rdb"

cli="redis-cli $REDIS_CLI"

dump_dir="app-root/data/.redis/dbs/dump.rdb"

path_start="/var/lib/openshift/$openshift_id"

backup_path="$path_start/$backup_dir"

rdb_path="$path_start/$dump_dir"

test -f $rdb_path || {
echo "[ERROR]: No RDB found at $rdb_path" ; exit 1
}
test -d $backup_dir || {
echo "[ERROR]: Backup directory not found. Please create backup directory $backup_path"
}

# perform a bgsave before copy

echo "Doing BGSAVE through Redis CLI"
echo "BGSAVE" | $cli
echo "waiting for 30 seconds..."
sleep 60

echo "Testing Redis status..."

try=5

while [ $try -gt 0 ] ; do
## redis-cli output dos format line feed '\r\n', remove '\r'
bg=$(echo 'info Persistence' | $cli | awk -F: '/rdb_bgsave_in_progress/{sub(/\r/, "", $0); print $2}')
ok=$(echo 'info Persistence' | $cli | awk -F: '/rdb_last_bgsave_status/{sub(/\r/, "", $0); print $2}')
if [[ "$bg" = "0" ]] && [[ "$ok" = "ok" ]] ; then

echo "Status OK. Copying dump."

dst="$backup_path/$backup_filename"
cp $rdb_path $dst
if [ $? = 0 ] ; then
echo "Redis rdb $rdb copied to $dst. Deleting old backups."

# delete rdb created 3 days ago
cd $backup_path
find . \( -name "Redis-dump*" \) -mtime +3 -exec rm -f {} \;
exit 0
else
echo "Failed to copy $rdb_path to $dst!"
fi
fi
try=$((try - 1))
echo "Redis status not OK. Redis may be busy, waiting and retry in 5s..."
sleep 5
done
exit 1