Date: Sun, 10 May 2009 21:54:42 -0700 From: Doug Barton <dougb@FreeBSD.org> To: Jeremie Le Hen <jeremie@le-hen.org> Cc: freebsd-current@FreeBSD.org Subject: Re: New mergemaster option -I, failsafe install files Message-ID: <4A07AF92.1040309@FreeBSD.org> In-Reply-To: <20090510165737.GB88857@obiwan.tataz.chchile.org>
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Jeremie Le Hen wrote: > Hi Doug, > > As you may guess from my multiple emails, I'm in the process of > upgrading my jails :-). > > Since I have one jail per service, a very few number of configuration > files are modified on each jail. As most of user of FreeBSD I think, > I'm used to run "mergemaster -iU" to automate the process as much as > possible. The problem with service jails (chapter 15.6.1 of the > handbook) is that / is read-only mounted on all jails, /etc /var /root > and a few other places being symlinks to /s, the private read-write > space of each jail. Thus when mergemaster tries to update > /boot/devices.hints it fails and abort. I think the way to solve this problem would be with an MM_PRE_COMPARE_SCRIPT that deletes /boot/device.hints (and any other relevant files) from the temproot. If they are not present in that directory when the comparison starts then it's a non-issue. > Therefore I've implemented a new -I option that does the same thing as > -i except that it will proceed on failure. ewwww, scary. :) Seriously though, I have very strong feelings about not blasting through errors since I have no way of determining which errors are/should be show stoppers, and which are merely annoying. And even if I thought I could write code to do that, the real answer would depend heavily on local policy in any case. Thanks for thinking about this issue in any case, Doughome | help
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