Date: Thu, 8 Dec 2016 17:41:09 +0000 From: SK <fbstable@cps-intl.org> To: Alexander Leidinger <Alexander@leidinger.net>, Miroslav Lachman <000.fbsd@quip.cz> Cc: freebsd-jail <freebsd-jail@freebsd.org> Subject: Re: ZFS and Jail :: nullfs mount :: nothing visible from host Message-ID: <ca9b4604-0009-005d-a24a-600450a3a81f@cps-intl.org> In-Reply-To: <20161208180235.Horde.fO_9WNB99V3gW75Y-XtE_Lt@webmail.leidinger.net> References: <aa078173-e9f1-3f09-41d4-6613014b1119@cps-intl.org> <584986D0.3040109@quip.cz> <2b6346f8-ed02-0e6d-bd89-106098e7eb2d@cps-intl.org> <20161208180235.Horde.fO_9WNB99V3gW75Y-XtE_Lt@webmail.leidinger.net>
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On 08/12/2016 17:02, Alexander Leidinger wrote: > Quoting SK <fbstable@cps-intl.org> (from Thu, 8 Dec 2016 16:41:29 +0000): > >> Thank you for your response. I tried setting it up like that (use zfs >> set jailed=on), and that did not work. I could not even run zfs from >> within the jail. Maybe I did something wrong -- so I am setting up a >> test box where I can try them all out. > > You need to have the zfs device visible in the jail, for this you need > to use a devfs rule at jail-start which makes it visible in the jail. > > See http://www.leidinger.net/blog/2011/05/19/how-i-setup-a-jail-host > in the part "Additional devfs rules for Jails" > (devfsrules_jail_withzfs). > > Bye, > Alexander. Dear Miroslav, Alexander Thank you both for the pointers. As soon as the test machine finishes compiling the world (I am using vimage, need custom kernel), I will give that a try. However, I did set up the things Miroslav suggested, along with tweaking the sysctl variables for jail zfs mount, and also setting the zfs jailed=on -- but on the existing system that had no effect whatsoever (even after a restart). So, I am thinking this might be due to the fact that all jails are nullfs mounted, hence the test box. I will update once I get the chance to play with the information you two kindly provided and let you know how it goes. Thanks and regards SK
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