Date: Wed, 28 Mar 2012 12:26:42 +0300 From: Beeblebrox <zaphod@berentweb.com> To: freebsd-fs@freebsd.org Subject: unionfs: strange error when mounted in jail. Message-ID: <CAPSTskuCmQ7%2BLMiu4jpi%2B-xhejwYxY%2BP_xQ6-p8Vi%2BJNVO1Hug@mail.gmail.com>
next in thread | raw e-mail | index | archive | help
I am using ezjail to setup some jailed services. Ezjail sets up a light-jail and a base(fat)-jail which is mounted "ro" under the light-jail. I modified this to experiment with an idea. In addition to the standard mount_nullfs ezjail does, I placed in /etc/fstab.pxe: > > /data/jails/base/usr/local /data/jails/pxe/usr/local unionfs rw,below,noatime,copymode=masquerade 0 0 > > /data/jails/base/var/db/pkg /data/jails/pxe/var/db/pkg unionfs rw,below,noatime,copymode=masquerade 0 0 What this does, is it allows to create a "base ports" fat-jail where all "base ports" will be included in subsequently created thin-jails, not as copy but as a unionfs layer. When updating ports in the jails, the "base ports" package will have to be updated only once, instead of repeated update for each thin-jail. I also have zfs dedup=on for the /data/jails folder. I install jail-specific ports into the thin-jail by normal process -> start the jail normally & pkg_add. I then shut-down jail, modify the jail's fstab (fstab.pxe) and re-start jail. The problem I run into: Start the jail, then #jexec into jailed env. Execute an app or service like portmaster (installed into /data/jails/base) or dhcpd installed into /data/jails/pxe) portmaster will start-up, but hangs after a short run. dhcpd hangs and freezes the jail immediately - I cannot kill any of the processes and have to do a poweroff. Both executables run normally without the unionfs structure. Regards.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAPSTskuCmQ7%2BLMiu4jpi%2B-xhejwYxY%2BP_xQ6-p8Vi%2BJNVO1Hug>