[Pkg-utopia-maintainers] Bug#734460: Bug#734460: network-manager: Issues related to systemd when upgrading from << 0.9.8.8-2

[Michael Biebl]

Am 07.01.2014 13:12, schrieb Laurent Bigonville:
> Package: network-manager
> Version: 0.9.8.8-2
> Severity: serious
> 
> Hi,
> 
> I'm opening this bug so this is not getting lost.
> 
> When upgrading from the previous versions the following events might
> occurs when the user is running systemd:
> 
> 1) The package was not enabling the systemd unit in the previous
> versions.
> 2) NM was then started using the LSB script called network-manager. This
> means that the cgroup was called network-manager.service.
> 3) During the upgrade the systemd unit is properly enabled and the LSB
> script is masked by a symlink, this means that at some point during the
> upgrade, the canonical name changes from network-manager.service to
> NetworkManager.service
> 4) At the end of the upgrade, systemd looks for a NetworkManager.service
> cgroups which is not existing and then concludes that the service is not
> running at all.
> 5) Systemd tries to start the service, NM complains that there is an
> other instance of itself running => boom
> 
> To fix this, I would propose to stop NM in the preinst script if we are
> upgrading from the previous versions and that the user is running
> systemd.

Why preinst and not postinst (before the #DEBHELPER# stanza, i.e. before
the service is enabled)?
Stopping the service in preinst creates unnecessary downtime which could
be fatal if NM is in charge of the network connection and you do a
remote upgrade.
I don't see a downside moving the network-manager stop to postinst, do
you? Just in case I'm missing something

-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 899 bytes
Desc: OpenPGP digital signature
URL: <http://lists.alioth.debian.org/pipermail/pkg-utopia-maintainers/attachments/20140112/50b872cb/attachment-0001.sig>