Date: Thu, 21 May 2009 10:42:27 +0200 From: Thomas Backman <serenity@exscape.org> To: Henri Hennebert <hlh@restart.be> Cc: freebsd-current@freebsd.org Subject: Re: How to duplicate a pool with zfs send/recv without breaking mountpoints? Message-ID: <7AB57D31-AE15-480D-8D2D-7AA000555CD2@exscape.org> In-Reply-To: <4A151263.2070708@restart.be> References: <E996C2EB-83A2-4004-B280-B329E348948F@exscape.org> <4A151263.2070708@restart.be>
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On May 21, 2009, at 10:35 AM, Henri Hennebert wrote: > Thomas Backman wrote: >> I'll let the output speak for itself. This is after running >> zpool create slave X && zfs create slave/received && NOW=$(date >> +"backup-%Y%m%d-%H%M"); zfs snapshot -r tank@$NOW && zfs send -R >> tank@$NOW | zfs recv -vFd slave/received && zpool export slave && >> zpool import slave >> [root@chaos ~]# mount >> tank/root on / (zfs, local, noatime) >> devfs on /dev (devfs, local) >> /dev/ad0s1a on /bootdir (ufs, local, soft-updates) >> tank/tmp on /tmp (zfs, local, noatime) >> tank/usr on /usr (zfs, local, noatime) >> tank/usr/ports on /usr/ports (zfs, local, noatime) >> tank/usr/ports/distfiles on /usr/ports/distfiles (zfs, local, >> noatime) >> tank/usr/src on /usr/src (zfs, local, noatime) >> tank/var on /var (zfs, local, noatime) >> //SERENITY@EXSCAPE/FBSDBACKUP on /mnt/backup (smbfs) >> slave/received/root on / (zfs, local, noatime) >> slave on /slave (zfs, local) >> slave/received/tmp on /tmp (zfs, local, noatime) >> slave/received/usr on /usr (zfs, local, noatime) >> slave/received/usr/ports on /usr/ports (zfs, local, noatime) >> slave/received/usr/ports/distfiles on /usr/ports/distfiles (zfs, >> local, noatime) >> slave/received/usr/src on /usr/src (zfs, local, noatime) >> slave/received/var on /var (zfs, local, noatime) >> [root@chaos ~]# ls /dev >> [root@chaos ~]# zfs list >> internal error: failed to initialize ZFS library (shocking!) >> Any ideas? I tried setting the mountpoint property on the slave, >> but I'm pretty sure that didn't help (as the next (incremental) >> backup resets the mountpoints to /... again, I suppose). > > How about creating slave like this: > > mkdir /slave > zpool create -R /slave -m none slave X > > Henri As always, when asking for help, the solution pops up right after posting. :-) I fixed it this morning, using pretty much your approach. However, according to the man pages, altroot isn't a permanent property, so I simply import it with zpool import -R every time. It'd be great if there is a better way, but this seems to work just fine. Regards, Thomas
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