Date: Sat, 13 Jun 2015 16:29:41 +0900 From: <kikuchan@uranus.dti.ne.jp> To: Marcus Reid <marcus@blazingdot.com> Cc: <freebsd-jail@freebsd.org>, <freebsd-zfs@freebsd.org> Subject: Re: zfs in a jail Message-ID: <e684c7f412b74e203edc765c5c1406f4@imap.cm.dream.jp> In-Reply-To: <20150613035921.GA22078@blazingdot.com> References: <20150613035921.GA22078@blazingdot.com>
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Hi,
I'm doing the exec.postcreate like thing with the following way, just FYI.
in /etc/jail.conf
----
exec.start=""
exec.poststart="/jail/poststart.sh ${name}"
----
in /jail/poststart.sh
----
jid=`/usr/sbin/jls -j $1 jid`
name="$1"
# Do whatever you want to initialize the jail from host, here
# Run the command in the jail
/usr/sbin/jexec "${name}" /bin/sh /etc/rc
----
I hope this may help you.
Regards,
Kikuchan
On Fri, 12 Jun 2015 23:59:21 -0400, Marcus Reid <marcus@blazingdot.com> wrote:
> Hi,
>
> I'm doing zfs from within a jail, and there is one thing that's giving
> me some trouble.
>
> First, the bits that get zfs working from inside a jail:
>
> /etc/jail.conf:
> allow.mount;
> allow.mount.zfs;
> enforce_statfs = 1;
>
> /etc/sysctl.conf:
> security.jail.mount_allowed=1
> security.jail.mount_zfs_allowed=1
> security.jail.enforce_statfs=1
>
> zfs set jailed=on zroot/jails/git/git
>
> Finally, to get the dataset visible inside the jail, this is required
> when the jail is running:
>
> zfs jail git zroot/jails/git/git
>
> So, in jail.conf, I do a:
>
> exec.poststart = "zfs jail git zroot/jails/git/git"
>
> Problem: zfs is not visible in jail after a reboot. This problem is
> understood but I don't know the solution.
>
> exec.poststart is run after exec.start (the thing that runs /etc/rc in
> the jail), so the zfs datasets are not yet visible when /etc/rc.d/zfs
> runs in the jail. So, I have to log into the jail and do a 'zfs mount
> -a' after everything comes up. Not ideal. If there were a
> exec.postcreate directive in jail.conf that ran a command on the host
> after jail creation but before /etc/rc starts, then I could run 'zfs
> jail' before the jails init scripts are run.
>
> Am I going about that in the wrong way? jail.conf seems like the right
> place for it, because you want your storage working after a 'jail -rc
> git', right?
>
> Thanks,
>
> Marcus
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