Date: Sat, 5 Oct 2019 08:35:15 -0400 From: Alejandro Imass <aimass@yabarana.com> To: Polytropon <freebsd@edvax.de> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Guides for ZFS Full backup to NFS drive and restore from NFS drive Message-ID: <CAHieY7SKdoNcmYG8SR8WWwjT%2BxG_O0A1Gufkhj7GXZpww_fOiw@mail.gmail.com> In-Reply-To: <20191005104413.39e3c081.freebsd@edvax.de> References: <CAHieY7S5W1NnQp9e=Dk3y_d1bdDgVwyw-3LTK%2BfeoKSDaGDegg@mail.gmail.com> <9177b014-9041-f51e-1856-b6dbdec4afc1@panix.com> <20191005104413.39e3c081.freebsd@edvax.de>
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On Sat, Oct 5, 2019 at 4:44 AM Polytropon <freebsd@edvax.de> wrote: > On Fri, 4 Oct 2019 18:38:49 -0400, Kurt Hackenberg wrote: > > On 2019-10-04 17:20, Alejandro Imass wrote: > > > > > Hi there FreeBSD folk! > > > > > > Are there any easy to follow guides to completely backup a FreeBSD > system > > > to an NFS drive and then restore the complete system from the backup > in the > > > NFS drive? > > > > > > I don't have much NFS expertise but it shouldn't be that complicated. > > > > > > I found this guide but not exactly what I'm looking for: > > > > > > > https://www.dan.me.uk/blog/2012/08/05/full-system-backups-for-freebsd-systems-using-zfs/ > > > > > [...] > Definitely. It is possible (and probably the way to go in this > scenario) to write the "zfs send" result to a file that is accessible > via NFS, first for backup, then have a rescue system handy (for > example, a FreeBSD live system CD, DVD, or USB stick) to boot > the system from again, make any neccessary preparations, and > then run "zfs receive" with the previously mentioned file via NFS > as source. So basically it's what you do with traditional dump > and restore via _files_ stored somewhere else on the network, > but with ZFS tools. :-) > > Or did I misunderstand the question? > > > Nope you definitely understood the question precisely. I have read enough to understand that the process is somewhat the following: 1) zfs snapshot 2) zfs sedn to a file 3) copy the file to the nfs mount 4) reconstruct my zfs raid (the main reason I am doing this) 5) zfs receive But the devil is in the details and I have not found a single fool proof recipe. IMHO the handbook still lacks a lot of practical information about ZFS administration "for dummies". The last time I blindly followed the handbook's limited recipes I did "detach" and the "add" like the handbook suggests, and the reason I am in this predicament in the first place: https://lists.freebsd.org/pipermail/freebsd-questions/2018-November/283219.html Kevin P. Neal knew the answer but came a little bit late after I had inadvertently converted my pool into a stripe :-( I probably wasn't the only one unable to find the right answer to a simple problem in the current documentation: https://forums.freebsd.org/threads/re-attaching-failed-device-to-pool.66027/ IIRC I did offer to collaborate and update the handbook for this particular case (re-attaching a drive with the same uuid) but nobody provided any pointers on who/how the handbook gets updated. What I want to do now is backup the entire system, reconstruct the raid1 pool and then restore the whole system INTACT. If there is no such documented recipe I am willing to fully document it with you guys' expert's help here and then find a way to collaborate with the handbook and add both use cases to it. For the common user like myself I really feel the ZFS section in the handbook needs a lot of work for practical day to day tasks, and the FBSD ZFS Wiki, at least IMHO, doesn't offer much help either. TIA! Alex
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