Puppet users - Feb 2012 - Puppet on RedHat - Manage Kernel Modules ?

Can puppet manage kernel customization on RedHat ?
I have some third-party gahrbaj that needs its own kernel level driver to work.

And, or course, every time the kerner version bumps up, it breaks until you
rebuild the custom stuff into the new kernel.

“Sometimes I think the surest sign that intelligent life exists elsewhere in the
universe is that none of it has tried to contact us.”
Bill Waterson (Calvin & Hobbes)

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I haven''t tested this but it should work.

class kernel(version=''latest'')
{
  package { ''rhel-
kernel'':
    ensure =>
$version,
    alias  =>
kernel,
    notify => Exec[''rebuild
gahrbaj''],
  }

  exec { ''rebuild
gahrbaj'':
    cwd         => ''/foo/bar/
gahrbaj'',
    command     => ''/usr/bin/make; /usr/bin/make install; modprobe
gahrbaj'', # commands to bulid and install
mdoule
    unless      => ''/bin/grep gahrbaj /proc/modules'', #
check if
module is loaded, if so don''t
rebuild
    require     => Package[''rhel-
kernel''],
    refreshonly => true, # only attempt if rhel-kernel has been
updated
  }
}

You would use it like this
node example.com {
  class { ''kernel'':
    version => ''3.2.7'',
  }
}

When you want to upgrade the kernel you would bump the version to the
next release. When puppet runs it will upgrade the kernel and the next
reboot puppet will detect that the module isn''t loaded and then
rebuild and install the module.

On Feb 24, 8:02 am, Dan White <y...@comcast.net>
wrote:
> Can puppet manage kernel customization on RedHat ?
> I have some third-party gahrbaj that needs its own kernel level driver to
work.
>
> And, or course, every time the kerner version bumps up, it breaks until you
rebuild the custom stuff into the new kernel.
>
> “Sometimes I think the surest sign that intelligent life exists elsewhere
in the universe is that none of it has tried to contact us.”
> Bill Waterson (Calvin & Hobbes)
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Sorry about the format, try this https://gist.github.com/1904714

On Feb 24, 3:54 pm, Jared Curtis <ja...@shift-e.info>
wrote:
> I haven''t tested this but it should work.
>
> class kernel(version=''latest'')
> {
>   package { ''rhel-
> kernel'':
>     ensure =>
> $version,
>     alias  =>
> kernel,
>     notify => Exec[''rebuild
> gahrbaj''],
>   }
>
>   exec { ''rebuild
> gahrbaj'':
>     cwd         => ''/foo/bar/
> gahrbaj'',
>     command     => ''/usr/bin/make; /usr/bin/make install;
modprobe
> gahrbaj'', # commands to bulid and install
> mdoule
>     unless      => ''/bin/grep gahrbaj /proc/modules'',
# check if
> module is loaded, if so don''t
> rebuild
>     require     => Package[''rhel-
> kernel''],
>     refreshonly => true, # only attempt if rhel-kernel has been
> updated
>   }
>
> }
>
> You would use it like this
> node example.com {
>   class { ''kernel'':
>     version => ''3.2.7'',
>   }
>
> }
>
> When you want to upgrade the kernel you would bump the version to the
> next release. When puppet runs it will upgrade the kernel and the next
> reboot puppet will detect that the module isn''t loaded and then
> rebuild and install the module.
>
> On Feb 24, 8:02 am, Dan White <y...@comcast.net> wrote:
>
>
>
>
>
>
>
> > Can puppet manage kernel customization on RedHat ?
> > I have some third-party gahrbaj that needs its own kernel level driver
to work.
>
> > And, or course, every time the kerner version bumps up, it breaks
until you rebuild the custom stuff into the new kernel.
>
> > “Sometimes I think the surest sign that intelligent life exists
elsewhere in the universe is that none of it has tried to contact us.”
> > Bill Waterson (Calvin & Hobbes)
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On 24.2.2012 17:02, Dan White wrote:
> Can puppet manage kernel customization on RedHat ?
> I have some third-party gahrbaj that needs its own kernel level driver to
work.
> 
> And, or course, every time the kerner version bumps up, it breaks until you
rebuild the custom stuff into the new kernel.
Because RHEL tries to preserve the Kernel ABI it should be possible to
build modules kernel version agnostic.

http://wiki.centos.org/HowTos/BuildingKernelModules?highlight=%28kmod%29
http://wiki.centos.org/HowTos/Custom_Kernel

-- 
Kind Regards, Markus Falb