[CentOS] Now booting - Re: Still won't boot - Re: remote yum update aborted with session closing - won't boot

[Robert Moskowitz]

On 07/02/2014 10:25 AM, Robert Moskowitz wrote:
> On 07/02/2014 10:20 AM, Robert Moskowitz wrote:
>> On 07/02/2014 09:35 AM, Reindl Harald wrote:
>>> Am 02.07.2014 15:19, schrieb Robert Moskowitz:
>>>> On 07/02/2014 08:41 AM, Reindl Harald wrote:
>>>>> Am 02.07.2014 14:32, schrieb Robert Moskowitz:
>>>>>> On 07/01/2014 06:25 PM, Frank Cox wrote:
>>>>>>> On Tue, 01 Jul 2014 18:19:32 -0400
>>>>>>> Robert Moskowitz wrote:
>>>>>>>
>>>>>>>> How do I trouble shoot this?  I am assuming that I only got a partially
>>>>>>>> completed update.
>>>>>>> Try yum-complete-transaction and see what happens.
>>>>>> Well it looks like all the updates 'took'  /etc/redhat-release now
>>>>>> reports ver 6.5.
>>>>>>
>>>>>> But still getting a kernel panic and boot failing.  I can fall back to
>>>>>> the prior kernel and it will boot.  So I tried to copy the lines off the
>>>>>> monitor, as nothing is getting logged:
>>>>>>
>>>>>> IOMMU: failed to mpa dmn 0
>>>>>> kernel panic - not syncing: VFS: Unable to mount root fs on
>>>>>> unknown_block (0,0)
>>>>>> Pid:1, comm swapper Tainted: G  -------------} 2.6.32-431.20.3.el6.i686 #1
>>>>>>
>>>>>> then a a number of dump lines.
>>>>>>
>>>>>> The kernel that is working (only other one listed in menu) is:
>>>>>> 2.6.32-279.22.1.el6.i686
>>>>> why don' t you just remove any package from the new kernel
>>>>> which don't work anyways and after that "yum upgrade" again?
>>>> But how do I determine what package from the new kernel
>>> i said: and after that "yum upgrade" again man if you remove that
>>> broken packages a "yum upgrade" pulls them simply as if they where
>>> never be installed and the rpmscripts will generate a new initrd
>> OK.  So...
>>
>> # yum erase kernel*
>>
>> ...
>>
>> Removing:
>>     kernel                           i686 2.6.32-431.20.3.el6
>> installed           89 M
>>     kernel-firmware                  noarch
>> 2.6.32-431.20.3.el6             installed           21 M
>>     kernel-headers                   i686 2.6.32-431.20.3.el6
>> installed          2.5 M
>> Removing for dependencies:
>>     glibc-devel                      i686 2.12-1.132.el6_5.2
>> installed          953 k
>>     glibc-headers                    i686 2.12-1.132.el6_5.2
>> installed          2.1 M
>>     irqbalance                       i686 2:1.0.4-9.el6_5
>> installed           64 k
>>     mod_perl                         i686 2.0.4-11.el6_5
>> installed          6.0 M
>>     perl-ExtUtils-MakeMaker          i686 6.55-136.el6
>> installed          608 k
>>     perl-ExtUtils-ParseXS            i686 1:2.2003.0-136.el6
>> installed           61 k
>>     perl-Test-Harness                i686 3.17-136.el6
>> installed          399 k
>>     perl-Test-Simple                 i686 0.92-136.el6
>> installed          184 k
>>     perl-devel                       i686 4:5.10.1-136.el6
>> installed          1.8 M
>>     redhat-lsb                       i686 4.0-7.el6.centos
>> installed          0.0
>>     redhat-lsb-compat                i686 4.0-7.el6.centos
>> installed          0.0
>>     redhat-lsb-core                  i686 4.0-7.el6.centos
>> installed           22 k
>>     redhat-lsb-graphics              i686 4.0-7.el6.centos
>> installed          0.0
>>     redhat-lsb-printing              i686 4.0-7.el6.centos
>> installed          0.0
>>
>> Transaction Summary
>> ===========================================================================================================
>> Remove       17 Package(s)
>>
>>
>> So I am making notes about what is being removed so I can insure that it
>> gets reinstalled with the upgrade.
> Well the upgrade is NOT reinstalling all that was erased:
>
> # yum upgrade
>
> Installing:
>    kernel                      i686 2.6.32-431.20.3.el6
> updates              26 M
> Installing for dependencies:
>    kernel-firmware             noarch 2.6.32-431.20.3.el6
> updates              13 M
>
> Transaction Summary
> ===========================================================================================================
> Install       2 Package(s)
>
> So looks like I will have to do all the others step by step.

So I made sure that all the packages were reinstalled.  I did it step by 
step and did 'yum install' on:

kernel-headers
glibc-devel
irqbalance
mod_perl
perl-Test-Simple
redhat-lsb

I then did a reboot and ran down to my NOC in the basement to watch the 
reboot.  I did catch a message on the console about rebuilding initrd, 
but I don't see a matching message in /var/log/messages.

Anyway I am now up and running.  Thank you for the help.  And Harald, I 
agree that if the system boots, it should be possible to get through a 
recovery to the proper point and not have to reinstall.

Now remember.  No big updates when vnced into the remote system. Use 
'screen'.  Remember use 'screen'.  :-)'