From owner-freebsd-stable@FreeBSD.ORG Sat Aug 10 20:07:34 2013 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 51548833; Sat, 10 Aug 2013 20:07:34 +0000 (UTC) (envelope-from gkontos.mail@gmail.com) Received: from mail-pd0-x230.google.com (mail-pd0-x230.google.com [IPv6:2607:f8b0:400e:c02::230]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 1D2F12E0F; Sat, 10 Aug 2013 20:07:34 +0000 (UTC) Received: by mail-pd0-f176.google.com with SMTP id q10so1831843pdj.7 for ; Sat, 10 Aug 2013 13:07:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=FGnGDQ6eAYe5pq+817FTrgKGpYC3c4cVbpgS0UpWdHo=; b=r/dWlpE47BBFQf7NHPlosaF+hiEPGKbBDWbT1SL5W51KS1+fR3uFYRZ3dCi3C16BaD TslRXvKbENc4G/9KBzJXasQQxCdaAbsk2sIftG6Ub1BBfIcsCJxBzw9shYkaqGm54qul 0XrAMz65oXGmaHajhBAhE2E8656FPoJBZaq4gfVXcID6PTyVu9KSlof/scaePu2WA1hB ncY/Ls64LFSFGHZ1BWbRR1rzrVt9owc9Bq/Pl8XOBlL1ZPqrj8FgaQmy/BL9Q9LLuyOH CfLtwFGQCKLM5IBr+0urymmDXMXYSYyVwHHmZ+THUKllYdA75Vr+qxZ1AQD8rlGVmoXy dyKg== MIME-Version: 1.0 X-Received: by 10.66.246.225 with SMTP id xz1mr6604531pac.110.1376165253603; Sat, 10 Aug 2013 13:07:33 -0700 (PDT) Received: by 10.68.211.106 with HTTP; Sat, 10 Aug 2013 13:07:33 -0700 (PDT) In-Reply-To: References: <1375963160.29686.7487435.7323F707@webmail.messagingengine.com> Date: Sat, 10 Aug 2013 23:07:33 +0300 Message-ID: Subject: Re: ZFS in jails 9.2-RC1 permission denied From: George Kontostanos To: =?ISO-8859-1?Q?Trond_Endrest=F8l?= Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.14 Cc: freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 10 Aug 2013 20:07:34 -0000 On Fri, Aug 9, 2013 at 2:22 PM, Trond Endrest=F8l < Trond.Endrestol@fagskolen.gjovik.no> wrote: > On Fri, 9 Aug 2013 14:07+0300, George Kontostanos wrote: > > > On Fri, Aug 9, 2013 at 1:57 PM, Trond Endrest=F8l < > > Trond.Endrestol@fagskolen.gjovik.no> wrote: > > > > > On Fri, 9 Aug 2013 13:35+0300, George Kontostanos wrote: > > > > > > > On Fri, Aug 9, 2013 at 8:55 AM, Trond Endrest=F8l < > > > > Trond.Endrestol@fagskolen.gjovik.no> wrote: > > > > > > > > > On Thu, 8 Aug 2013 19:04+0300, George Kontostanos wrote: > > > > > > > > > > > On Thu, Aug 8, 2013 at 2:59 PM, Mark Felder > > > wrote: > > > > > > > > > > > > > On Thu, Aug 8, 2013, at 6:53, George Kontostanos wrote: > > > > > > > > > > > > > > > > Anybody? > > > > > > > > > > > > > > > > > > > > > > Can you provide your jail configuration? I think 9.2 introduc= es > > > the new > > > > > > > /etc/jail.conf functionality and perhaps it somehow it broke > the > > > way > > > > > you > > > > > > > were doing it previously? If so, the old method is supposed t= o > be > > > work > > > > > > > as well... > > > > > > > > > > > > jail_enable=3D"YES" > > > > > > jail_list=3D"jail1" > > > > > > jail_jail1_rootdir=3D"/tank/jails/jail1" > > > > > > jail_jail1_hostname=3D"jail1" > > > > > > jail_jail1_interface=3D"em0" > > > > > > jail_jail1_ip=3D"172.16.154.32" > > > > > > jail_jail1_devfs_enable=3D"YES" > > > > > > > > > > During my experimentation yesterday, I had to add: > > > > > > > > > > jail_jail1_parameters=3D"enforce_statfs=3D1 allow.mount=3D1 > > > allow.mount.zfs=3D1" > > > > > > > > > > I wish there was a way of executing a command in the host > environment > > > > > _after_ the jail is created, but _before_ exec.start is run from > > > > > within the jail environment, exec.prestart is run in the host > > > > > environment before the jail is created and is of no use for > attaching > > > > > a ZFS dataset to a particular jail with the zfs jail command. > > > > > > > > > > Until this issue is resolved, I see no other way than manually > > > > > attaching a ZFS dataset to a jail, and manually running the mount > > > > > command from within the jail environment. > > > > > > > > Excellent, this worked like a charm! > > > > > > > > Does this means that the sysctl parameters are not honored or they > have > > > to > > > > be also passed in the jail parameters? > > > > > > I guess so. Setting the sysctls in /etc/sysctl.conf doesn't seem to > > > propagate to the jail environments at all in 9.2-BETA2. > > > > > > > Thanks! > > > > > > You're welcome, and thanks for pushing me to explore jails and ZFS > > > even further. ;-) > > > > > > Maybe the jail people should erect exec.afterprestart, enabling us to > > > attach ZFS datasets to our jails prior to launching the jails. > > > > I think that the process of attaching a dataset or a pool to a jail has > to > > be done after the JID has been created. The way I attach them is from t= he > > host system: > > > > #zfs jail pool/dataset > > That's why I propose the exec.afterprestart. This is how I imagine it > should work: > > 1. The operator attempts to create a jail: jail -c somejail > > 2. The exec.prestart is run within the _host_ environment. It is of no > concern regarding attaching ZFS datasets to our jail. > > 3. The jail is actually created, say, with /jails/somejail > (zjails/jails/somejail) as it root. > > 4. The exec.afterprestart is run within the _host_ environment, and in > our case is configured to attach some ZFS datasets, say: > > zfs jail somejail zjails/jaildata/somejail > > 5. The exec.start is run within the _jail_ environment, typically > running /etc/rc. > > 6. /etc/fstab within the _jail_ environment contains the necessary > information to mount zjails/jaildata/somejail as /jaildata. > > 7. Everything else remains unchanged. > > -- > +-------------------------------+------------------------------------+ > | Vennlig hilsen, | Best regards, | > | Trond Endrest=F8l, | Trond Endrest=F8l, = | > | IT-ansvarlig, | System administrator, | > | Fagskolen Innlandet, | Gj=F8vik Technical College, Norway, | > | tlf. mob. 952 62 567, | Cellular...: +47 952 62 567, | > | sentralbord 61 14 54 00. | Switchboard: +47 61 14 54 00. | > +-------------------------------+------------------------------------+ > Sounds very good! As a side note. I noticed that if I log into the jail and issue: zail1> zfs mount -a All datasets are available. --=20 George Kontostanos --- http://www.aisecure.net