Dear team I am running a centos guest VM which freezes for every few days . The qemu-kvm on shows 100% cpu utilization. Ping to the guest might work or may not work .Please can you tell me what approach can i take to debug it . using "virsh dump" I can dump the core of the guest vm but I am not sure how to analyse it . Guest Centos VM : "Linux GUESTCentOS70 3.10.0-123.4.4.el7.x86_64 #1 SMP Fri Jul 25 05:07:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux" "CentOS Linux release 7.0.1406 (Core)" 1 vcpu and 2 GB ram
Host machine : "Linux HOST 3.10.51-1.el6.elrepo.x86_64 #1 SMP Fri Aug 1 13:14:11 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux" "CentOS release 6.5 (Final)" qemu-kvm package used : qemu-kvm-0.12.1.2-2.415.el6_5.10.x86_64 Thanks and regards Akshar
Hi Thanks for the reply
We have seen the same guest VM freezing on vmware ESXi machine also , so we were interested in know in the internal condition of the guest vm when the freeze happened How can we analyse the core file generated by "virsh dump "
Thanks and regards Akshar
On Wed, Jan 9, 2019 at 1:58 PM Manuel Wolfshant wolfy@nobugconsulting.ro wrote:
On 1/9/19 11:50 AM, Akshar Kanak wrote:
No wonder given that the guest remains 5 years out of date even when using a different hypervisor. Leaving aside that also the long-term kernel installed from ElRepo that you are using is also more then 4 years out of date.
Please update the OS(es) to the current supported OS versions ( that is, 7.6 / 6.10 ) and verify if the problems persist. But you've already been told that by several persons...
http://bfy.tw/LhMS might help with that
Regards,
manuel
Use crash(8).
When you've discovered the internal state of the comatose guest what are you going to do with it? Find out when it was fixed in the years since you updated and update to that version? Add it to the list of rediscovered bugs? Wait to see if it happens again before you are pwned by one of the many, many security fixes since you last updated?
jch
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Akshar Kanak -
John Haxby -
Manuel Wolfshant