linux-ext4 - Re: How to package e2scrub

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Date:   Wed, 29 May 2019 19:54:19 -0600
From:   Andreas Dilger <adilger@...ger.ca>
To:     Theodore Ts'o <tytso@....edu>
Cc:     Lukas Czerner <lczerner@...hat.com>, linux-ext4@...r.kernel.org,
        Jan Kara <jack@...e.com>
Subject: Re: How to package e2scrub

Rather than naming the packages "e2scrub-*" it makes more sense to me to use "e2fsprogs-scrub" so that it is clear this is a sub-package of e2fsprogs?  Or is the thought that the scrub functionality might move out of e2fsprogs and xfsprogs at some point in the future.

Cheers, Andreas

PS: I'd agree with Darrick that "xfsprogs-scrub" is probably a better name. 

> On May 29, 2019, at 17:59, Theodore Ts'o <tytso@....edu> wrote:
> 
>> On Wed, May 29, 2019 at 02:06:03PM +0200, Lukas Czerner wrote:
>> Hi guys,
>> 
>> I am about to release 1.45.2 for Fedora rawhide, but I was thinking
>> about how to package the e2scrub cron job/systemd service.
>> 
>> I really do not like the idea of installing cron job and/or the service as
>> a part of regular e2fsprogs package. This can potentially really surprise
>> people in a bad way.
>> 
>> Note that I've already heard some complaints from debian users about the
>> systemd service being installed on their system after the e2fsprogs
>> update.
> 
> One of the reasons I deliberately decided to enable it for Debian
> Unstable was it was the best way to flush out the bugs.  :-)
> 
> Yeah, Debian Unstable users are my guinea pigs. :-)   Doesn't it work
> that way with Fedora and RHEL?  :-)
> 
> BTW, The complaints were mostly from e2scrub_all not working correctly
> if certain packages weren't installed, or if the LVM package was
> installed, but there were no LVM volumes present, etc.  The other
> complaint I got was when there was no free space for the snapshot.
> I'm kind of hopeful that I've gotten them all at this point, but we'll
> see....
> 
>> What I am going to do is to split the systemd service into a separate
>> package and I'd like to come to some agreement about the name of the
>> package so that we can have the same name across distributions (at least
>> Fedora/Debian/Suse).
> 
> Hmm.... what keeping the service as part of the e2fsprogs package, but
> then not enabling out of the box.  That is, require that user run:
> 
> systemctl enable e2scrub_all.timer
> 
> in order to actually get the feature?  (They can also disable it using
> "systemctl disable e2scrub_all.timer".)
> 
> As far as the cron job is concerned, we could just leave the crontab
> entry commented out by default, and require that the user go in and
> edit the /etc/cron.d/e2scrub_all file if they want to enable it.  Not
> packaging it also seems fine; Debian's support for non-systemd
> configurations is at best marginal at this point, and while I'm not a
> fan of systemd, I'm also a realist...
> 
> What do folks think?
> 
>                    - Ted