On Fri, Dec 24, 2021 at 05:17:07PM +0800, 李菲 wrote:
> On Fri, Dec 24, 2021 at 3:02 AM Marc Haber <mh+debian-packa...@zugschlus.de>
> wrote:
> 
> > On Thu, Dec 23, 2021 at 07:48:19PM +0100, Marc Haber wrote:
> > > The interesting line of code is
> > >
> > > deb-systemd-invoke $_dh_action 'atop-rotate.service' 'atop-rotate.timer'
> > 'atop.service' 'atopacct.service
> > >
> > > which will instruct systemd to start all those four services. I am not
> > > sure whether it makes sense for atop to explicitly start the two
> > > atop-rotate units, and I think that systemd decides by itself in which
> > > order the units are started.
> >
> > The atopacct unit (systemctl cat atopacct) has an explicit "Before:
> > atop.service" listed. So, systemd SHOULD take care of starting atopacctd
> > first before atop is started.
> >
> Actually I am not sure whether "before: " only guarantees this
> when the host machine restarts, but not installing packages.

I surely do hope that this also applies to systemctl transactions.
atop's maintainer scripts group all unit starts into a single
transaction, leaving the order of execution to systemd. That's done by
debhelper, and as a package maintainer I am not going to interfere with
that. The best I can do is to help upstream to properly design their
systemd units and probably make code changes to make startup more
robust.

> > Can you please verify (maybe from syslog?) that the start order is
> > actually wrong when you encounter the situation of misbehavior?
> >
> > Run `dpkg --purge atop && dpkg -i ../atop_2.6.0+byted3_amd64.deb`,
> and see the log, just as follows:
> # journalctl | grep atop
> 
> Dec 24 17:08:22 n198-252-111 atopacctd[27883]: Terminated by signal 15
> 
> Dec 24 17:08:22 n198-252-111 systemd[1]: atopacct.service: Succeeded.
> 
> Dec 24 17:08:22 n198-252-111 systemd[1]: atop.service: Succeeded.
> 
> Dec 24 17:08:22 n198-252-111 systemd[1]: atop-rotate.timer: Succeeded.
> 
> Dec 24 17:08:22 n198-252-111 systemd[1]: Stopped Daily atop restart.
> 
> Dec 24 17:08:31 n198-252-111 systemd[1]: Started Daily atop restart.
> 
> Dec 24 17:08:32 n198-252-111 atopacctd[29508]: Version: 2.6.0+byted3 -
> 2021/12/23 17:02:33  <gerlof.langev...@atoptool.nl>
> 
> Dec 24 17:08:32 n198-252-111 atopacctd[29508]: accounting to
> /run/pacct_source

Is that reproducible?

> > (2) psacct is installed or not?
> >
> Yes,
> 
> # dpkg -L atop |grep pacct
> 
> /etc/init.d/atopacct
> 
> /lib/systemd/system/atopacct.service
> 
> /usr/sbin/atopacctd
> /usr/share/man/man8/atopacctd.8.gz

pSacct is a different package, dpkg --list psacct please.

Greetings
Marc

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