Hi again all, on a roll today.
This time I finally got round to writing a backup script so that I don't have to do it by hand. I've usually done this with a remote tool in the past but I wanted some extra cover and something I can run manually as well if I need an extra backup.
The script here is written as a daily rotating backup so there are some things that you might want to do, I've listed some at the end.
You will need to have
rsync installed but nothing else is needed other than CRON to run on a daily schedule (you could do that from within Node-RED if you wanted to).
However, this version also uses mosquitto_pub to send notifications on success or failure. Remove if you don't want that. You could instead use CURL to trigger a Node-RED endpoint.
#! /usr/bin/env bash # Redirect stdout to syslog - show with: `sudo journalctl -t nrmain-backup` exec 1> >(logger -t nrmain-backup -p local0.info) # redirect stderr to syslog exec 2> >(logger -t nrmain-backup -p local0.err) # --- SET THESE TO THE CORRECT LOCATIONS --- # SOURCE_PATH=. DEST_PATH=../nrmain-backup # ------------------------------------------ # STARTDATE=$(date +'%Y-%m-%d %T') echo " " echo "Starting daily backup of $SOURCE_PATH/ to $DEST_PATH/ ..." echo "Rotating snapshots ..." # Delete oldest daily backup if [ -d $DEST_PATH/daily.7 ] ; then echo "Deleting oldest daily backup $DEST_PATH/daily.7" rm -rf $DEST_PATH/daily.7 fi # Shift all other daily backups ahead one day for OLD in 6 5 4 3 2 1 ; do if [ -d $DEST_PATH/daily.$OLD ] ; then NEW=$(($OLD+1)) echo "Moving $DEST_PATH/daily.$OLD to $DEST_PATH/daily.$NEW" # Backup last date # ISSUE: touch does not support options on synology (busybox) system touch $DEST_PATH/.timestamp -r $DEST_PATH/daily.$OLD mv $DEST_PATH/daily.$OLD $DEST_PATH/daily.$NEW # Restore timestamp touch $DEST_PATH/daily.$NEW -r $DEST_PATH/.timestamp fi done # Copy hardlinked snapshot of level 0 to level 1 (before updating 0 via rsync) if [ -d $DEST_PATH/daily.0 ] ; then echo "Copying hardlinks from $DEST_PATH/daily.0 to $DEST_PATH/daily.1" cp -al $DEST_PATH/daily.0 $DEST_PATH/daily.1 fi echo "Finished rotating snapshots ..." if ! [ -d $DEST_PATH/daily.0 ] ; then mkdir -p $DEST_PATH/daily.0 fi # Set today's date on the current backup folder touch $DEST_PATH/daily.0 ENDDATE=$(date --iso-8601=s) # Back up echo "Performing rsync backup ..." rsync --archive --hard-links --delete --delete-excluded \ --exclude 'node_modules' --exclude 'data/node_modules' \ $SOURCE_PATH/ $DEST_PATH/daily.0 # Validate return code # 0 = no error, # 24 is fine, happens when files are being touched during sync (logs etc) # all other codes are fatal -- see man (1) rsync if ! [ $? = 24 -o $? = 0 ] ; then echo "Fatal: Node-RED daily backup finished with errors!" mosquitto_pub -r -t services/nrmainbackup/daily/fail -m $ENDDATE else echo "Finished Node-RED daily backup, no errors." mosquitto_pub -r -t services/nrmainbackup/daily/success -m $ENDDATE fi # Sync disks to make sure data is written to disk sync #EOF
Some things you might want to do differently:
- This version is set up to work with my alternate installer and assumes that you are running Node-RED with a user account. The folder containing node-red is
~/nrmain, the userDir folder is
~/nrmain.data. You might want to adjust paths.
- Have more than 7d of backups. Maybe a second script that rotates monthly.