Re: rsync -ax and subvolumes

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On Thu 2019-10-10 (20:47), Kai Krakow wrote:

> Actually, you could also just bind-mount into /mnt/btrfs, bind-mounts
> won't inherit other mounts but will still see pure subvolumes.

Next problem:

root@ptm1:~# sysinfo 
System:        Linux ptm1 4.4.180-94.100-default x86_64
Distribution:  SUSE Linux Enterprise Server 12 SP3

root@ptm1:~# mount | grep sda
/dev/sda2 on / type btrfs (rw,relatime,space_cache,subvolid=453,subvol=/@/.snapshots/128/snapshot)
/dev/sda2 on /.snapshots type btrfs (rw,relatime,space_cache,subvolid=270,subvol=/@/.snapshots)
/dev/sda2 on /opt type btrfs (rw,relatime,space_cache,subvolid=259,subvol=/@/opt)
/dev/sda2 on /var/log type btrfs (rw,relatime,space_cache,subvolid=264,subvol=/@/var/log)
/dev/sda2 on /srv type btrfs (rw,relatime,space_cache,subvolid=260,subvol=/@/srv)
/dev/sda2 on /var/tmp type btrfs (rw,relatime,space_cache,subvolid=267,subvol=/@/var/tmp)
/dev/sda2 on /var/spool type btrfs (rw,relatime,space_cache,subvolid=266,subvol=/@/var/spool)
/dev/sda2 on /usr/local type btrfs (rw,relatime,space_cache,subvolid=262,subvol=/@/usr/local)
/dev/sda2 on /var/opt type btrfs (rw,relatime,space_cache,subvolid=265,subvol=/@/var/opt)
/dev/sda2 on /home type btrfs (rw,relatime,space_cache,subvolid=258,subvol=/@/home)
/dev/sda2 on /var/lib/machines type btrfs (rw,relatime,space_cache,subvolid=1235,subvol=/@/var/lib/machines)
/dev/sda2 on /tmp type btrfs (rw,relatime,space_cache,subvolid=261,subvol=/@/tmp)
/dev/sda2 on /var/crash type btrfs (rw,relatime,space_cache,subvolid=263,subvol=/@/var/crash)

root@ptm1:~# mount -o bind / /mnt/tmp

root@ptm1:~# find /opt | wc -l
564

root@ptm1:~# find /mnt/tmp/opt | wc -l
1


I want to copy everything from /dev/sda2 with rsync, but not from other devices.

rsynv -avH  / /mnt/usb # copies also /proc /dev etc
rsynv -avHx / /mnt/usb # copies ONLY / but not /opt /var/log etc

And yes, it must be rsync, because I run this command often, for syncing.

-- 
Ullrich Horlacher              Server und Virtualisierung
Rechenzentrum TIK         
Universitaet Stuttgart         E-Mail: horlacher@xxxxxxxxxxxxxxxxxxxx
Allmandring 30a                Tel:    ++49-711-68565868
70569 Stuttgart (Germany)      WWW:    http://www.tik.uni-stuttgart.de/
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