Date: Thu, 8 Dec 2016 16:41:29 +0000 From: SK <fbstable@cps-intl.org> To: Miroslav Lachman <000.fbsd@quip.cz>, freebsd-jail <freebsd-jail@freebsd.org> Subject: Re: ZFS and Jail :: nullfs mount :: nothing visible from host Message-ID: <2b6346f8-ed02-0e6d-bd89-106098e7eb2d@cps-intl.org> In-Reply-To: <584986D0.3040109@quip.cz> References: <aa078173-e9f1-3f09-41d4-6613014b1119@cps-intl.org> <584986D0.3040109@quip.cz>
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On 08/12/2016 16:14, Miroslav Lachman wrote: > SK wrote on 2016/12/08 15:22: > >> So far I have tried to follow as many google results as possible using >> jail, zfs, mountpoint, nullfs, manage zfs and so on. There were a few >> sites coming up again and again but they were talking about ezjail (not >> that I have anything against it, but I would prefer to be able to use >> the base system as it is -- might help me learn a few things that ezjail >> will hide from me :D) > > If you want to manage ZFS dataset from withing a jail, then you need > to use zfs set jailed=on property (see man zfs). But this data set > cannot be mounted as nullfs, it should be dedicated to the jail. > > You don't need ezjail because ezjail cannot do anything more than you > can do. It is just a shell script wrapper. > > Miroslav Lachman > Hi Miroslav 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. I also came across these links https://clinta.github.io/freebsd-jails-the-hard-way/ http://aaron.baugher.biz/unix/freebsd-jails-zfs-1 I will give these a try. However, neither confirms (or maybe I missed it) if I can manage/manupulate the zfs datasets from within the jail -- and that seems to be the logical approach based on various emails on the mailing lists. So, what I am really after is some kind of a pointer/direction, maybe even a rough sketch of a how-to, that would help in getting started at least. I am not new to jails -- it is just that so far most of my jails were on UFS systems and I never encountered this issue of data mismatch between what the Jail can see and what the host can see. Thanks again SK
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