On Wed, 2013-03-20 at 05:48 -0700, Sage Weil wrote: > On Wed, 20 Mar 2013, Laszlo Boszormenyi (GCS) wrote: > > On Tue, 2013-03-19 at 15:59 -0700, Sage Weil wrote: > > > As a point of comparison, mysql removes the config files but not > > > /var/lib/mysql. > > > The question is, is that okay/typical/desireable/recommended/a bad idea? I should have asked this sooner. Do you know _any_ program that removes your favorite music collection, your family photos or your business emails when you do uninstall it? I suspect that your question was theoretical instead. On Wed, 2013-03-20 at 09:48 -0500, Mark Nelson wrote: On 03/20/2013 07:48 AM, Sage Weil wrote: > It's not as important given that it won't outright destroy the cluster, > but perhaps we should also leave /etc/ceph untouched on purge if a > ceph.conf file has been placed in it (since that also was not installed > by the package, but rather by a user?). I figure we should probably try > to get it right now. The message about the directory not being empty > sounds good. Sure, personal user data must be kept. If it's a big amount of data and left under a non-standard location (ie, not under his/her $HOME) then s/he should be informed where those files are located on purge. > My thought here is: > - remove anything created by the packages in /var/lib/ceph that has been > untouched since package installation. > - remove /var/lib/ceph if it has been untouched Please note that you have to store some kind of checksum for the files then. Probably md5sum is enough. > - remove /etc/ceph if it has been untouched This is an other case. dpkg itself handle package files here, called conffiles. I should check the method (md5sum and/or sha1 variants) used for the checksum on these files. On upgrade it's used not to overwrite local changes by the user. It may worth to read a bit more about it[1] from Raphaël Hertzog. He is the co-author of Debian Administrator's handbook[2] BTW. On purge dpkg will remove the package conffiles no matter what. It won't check if those were changed or not. You may not mark the files under /etc as conffiles, but then you'll lose the mentioned merge logic on upgrades; dpkg will just overwrite those. In short, files under /var/lib/ceph are the only candidates for in-package checksumming. How many files under there that essential for the packages? Laszlo/GCS [1] http://raphaelhertzog.com/2010/09/21/debian-conffile-configuration-file-managed-by-dpkg/ [2] http://debian-handbook.info/ -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
