[Users] OpenVZ kernel RPM name
dag at wieers.com
Mon Oct 23 04:36:20 EDT 2006
On Tue, 17 Oct 2006, Kirill Kolyshkin wrote:
> On 10/16/06, Dag Wieers <dag at wieers.com> wrote:
> > Yet another mail. The official openvz kernel RPMs are named in such a way
> > that it causes problems. Tools like yum and apt make a special case about
> > kernel RPM files because multiple of these can be installed next to each
> > other.
> > Because OpenVZ name their kernel ovzkernel, this is not possible. Can we
> > change the name of the OpenVZ kernel package from:
> > ovzkernel-2.6.9-023stab030.1-smp
> > to:
> > kernel-smp-2.6.9-42.0.3.ovz.1
> > This would make it more clear to people what it is based on and would make
> > apt and yum work with those kernels by default.
> I though that (at least) yum detects "install-only" packages by their
> 'provides', not by name. I might be wrong with that though...here's a
> relevant section of /usr/lib/yum-plugins/installonlyn.py (yum-2.6.1):
> for instpkg in conf.installonlypkgs:
> for m in mems:
> if (m.name == instpkg or instpkg in m.po.getProvidesNames()) \
> and m.ts_state in ('i', 'u'):
> I'm not yum expert but it seems that 'instpkg in m.po.getProvidesNames()' is
> the piece of code which helps in this scenario.
It's possible, still I don't see why you would deviate from the standard
name. The functionality is most likely introduced to consider kernel-smp
and kernel-bigmem as an alternative to kernel.
Nevertheless, this doesn't work for apt. kernel-ovz might work, but the
proper way to tag a package is in the version or release tags. Not the
> We name our kernel packages as 'ovzkernel...' just because we don't want to
> mess with usual non-openvz kernels. OpenVZ and non-OpenVZ kernel should not
> be treated uniformly, otherwise yum will "upgrade" OpenVZ
> 2.6.16-basedkernel with stock
> 2.6.18 -- which is a wrong thing to do. Well, the fact that vzctl depends on
> something that ovzkernel provides might help, but I'm not sure.
People should restrict what packages they use from what repsitory they
have enabled and/or exceptions. Having ovzkernel will not prevent
additional kernel packages to be updated and potentially replacing the ovz
kernel in grub. Especially when like in our case, we like to have the
stock kernel available for disaster recovery, troubleshooting or
So I don't see the purpose of renaming the ovz kernel package to
ovzkernel. Users still need to check what kernel is in place and verify
before rebooting. If anything, it gives a false sense of security or
causes more confusing.
Especially when documentation and forums refer to the following
command to list the available kernels:
rpm -q kernel
or rpm -qa 'kernel-*'
Proper standards should try to reduce the amount of 'expert' information.
Needing to know that the openvz kernel is called ovzkernel is useless
information by any means.
-- dag wieers, dag at wieers.com, http://dag.wieers.com/ --
[all I want is a warm bed and a kind word and unlimited power]
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