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 10:24 AM, Akshar Kanak wrote:

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

I'd say that you should start by updating the OS on both host and guest. Both OSes are heavily outdated, you lack YEARS of updates.

Regards


Manuel

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CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt

On 9 Jan 2019, at 09:50, Akshar Kanak akshar.kanak1@gmail.com wrote:

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 "

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

Thanks and regards Akshar

On Wed, Jan 9, 2019 at 1:58 PM Manuel Wolfshant wolfy@nobugconsulting.ro wrote: On 1/9/19 10:24 AM, Akshar Kanak wrote:

...

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

I'd say that you should start by updating the OS on both host and guest. Both OSes are heavily outdated, you lack YEARS of updates.

Regards



Manuel

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CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt _______________________________________________ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt