Hey folks, Is anybody able to help a Solaris scripting newbie with this? I want to put together an automatic script to take snapshots on one system and send them across to another. I've shown the manual process works, but only have a very basic idea about how I'm going to automate this.
My current thinking is that I want to put together a cron job that will work along these lines: - Run every 15 mins - take a new snapshot of the pool - send the snapshot to the remote system with zfs send / receive and ssh. (am I right in thinking I can get ssh to work with no password if I create a public/private key pair? http://www.go2linux.org/ssh-login-using-no-password) - send an e-mail alert if zfs send / receive fails for any reason (with the text of the failure message) - send an e-mail alert if zfs send / receive takes longer than 15 minutes and clashes with the next attempt - delete the oldest snapshot on both systems if the send / receive worked Can anybody think of any potential problems I may have missed? Bearing in mind I've next to no experience in bash scripting, how does the following look? ********************************************************************** #!/bin/bash # Prepare variables for e-mail alerts SUBJECT="zfs send / receive error" EMAIL="[EMAIL PROTECTED]" NEWSNAP="build filesystem + snapshot name here" RESULTS=$(/usr/sbin/zfs snapshot $NEWSNAP) # how do I check for a snapshot failure here? Just look for non blank $RESULTS? if $RESULTS; then # send e-mail /bin/mail -s $SUBJECT $EMAIL $RESULTS exit fi PREVIOUSSNAP="build filesystem + snapshot name here" RESULTS=$(/usr/sbin/zfs send -i $NEWSNAP $PREVIOUSSNAP | ssh -l *user* *remote-system* /usr/sbin/zfs receive *filesystem*) # again, how do I check for error messages here? Do I just look for a blank $RESULTS to indicate success? if $RESULTS ok; then OBSOLETESNAP="build filesystem + name here" zfs destroy $OBSOLETESNAP ssh -l *user* *remote-system* /usr/sbin/zfs destroy $OBSOLETESNAP else # send e-mail with error message /bin/mail -s $SUBJECT $EMAIL $RESULTS fi ********************************************************************** One concern I have is what happens if the send / receive takes longer than 15 minutes. Do I need to check that manually, or will the script cope with this already? Can anybody confirm that it will behave as I am hoping in that the script will take the next snapshot, but the send / receive will fail and generate an e-mail alert? thanks, Ross -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
