[Yum] Keep just one specific kernel version

[Gerry Reno]

Nifty nifty.hat Mitch wrote:
> On Thu, Apr 09, 2009 at 10:17:13PM -0400, Gerry Reno wrote:
>   
>> Nifty nifty.hat Mitch wrote:
>>     
>>> On Thu, Apr 09, 2009 at 03:05:15PM -0400, Gerry Reno wrote:
>>>   
>>>       
>>>> I ran into a situation where we needed to boot into rescue mode to   
>>>> repair an older F7 system.  Once in rescue mode I chrooted into   
>>>> /mnt/sysimage and tried starting rpcbind and nfs.  I was greeted with 
>>>>  errors about couldn't find kernel lib modules.  Then it dawned on me 
>>>>  that this system had been updating the kernel so it no longer had 
>>>> the  original kernel available that would match the kernel from the 
>>>> rescue  disk. 
>>>>
>>>> So is there a way to keep the original kernel and still allow the 
>>>> system  to update to newer kernels?  I just want to keep the one 
>>>> original kernel  version so that it will match rescue mode.  
>>>> Otherwise the system should  be free to update the kernel if it 
>>>> wishes and only keep two most recent  kernels (plus the one original 
>>>> kernel).
>>>>
>>>>     
>>>>         
>>> Look at    installonly_limit=
>>> in /etc/yum.conf.
>>>
>>> If you set the limit large enough all kernels will
>>> be kept.   If your /boot/... device is small you will need to use "rpm" 
>>> and erase specific extra kernels....
>>>       
> .....
>   
>> Hi Tom,
>> Yes, I looked at installonly_limit and if you set it to 0(zero) it  
>> should keep everything which would solve the issue and we could remove  
>> those kernels that we didn't want to keep. The archive.fedoraproject.org  
>> seems to still have F7 rpms. Hopefully they will keep these for all the  
>> old Fedora distros. And I've been building some more of those USB  
>> recovery boot drives. Handy little things (except when you can't find  
>> them :-)
>>     
>
> Repos with F7 bits will become rare.
> If F7 is important to you do archive all the F7 RPM you currently 
> have installed and more if you can get them.   Burning them (and SRPM) to 
> a DVD is a good thing.  If you have the disk space setup a F7 mirror
> and back it up. Do not set the rsync flag that removes files ;-)
>
>
>
>
>   
Repos with F7 have already been rare. The only repo appears to be the 
fedora archive. All the mirrors direct you there.

This mismatch to the rescue kernel is a problem. And the solution of 
keeping all kernels is not optimal. We need a way to 'pin' the original 
kernel but still let the kernel updates happen.

Regards,
Gerry