ZFS full system backup hoses the backup host.

[Allan Jude]

On 2016-02-25 15:58, Zaphod Beeblebrox wrote:
> This violated POLA for me.  I backed up a host using:
> 
> time zfs send -vRI @backup-1-e zroot at backup-1-f | ssh backuphost "zfs
> receive -vFud zroot/backup/host"
> 
> 
> Only to find that the backup host (a week later) failed to reboot?  The
> problem?  Well... -u on receive marks the filesystem as unmounted only
> "right now" not "next reboot" and -R on send implies -p (send dataset
> attributes) and...
> 
> ... zroot/ROOT/default mountpoint=/ (among others).
> 
> The only hackish way to fix this I see is to have a list of mountpoints to
> correct --- which is partially what I'm trying to avoid by using -R --- I
> just want the whole thing backed up.
> 
> What have other people done to get around this and/or can we either put in
> an "ignore properties" on receive flag or a -R on send that doesn't send
> them?
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The sysutils/zxfer script allows you to override properties during
replication, so I usually set readonly=on and for such a backup would
set mountpoint=none



-- 
Allan Jude

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