Re: [CentOS-virt] [QEMU-KVM] Centos guest VM freezing
> On 9 Jan 2019, at 09:50, Akshar Kanak 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 > 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 OSes are heavily outdated, you lack YEARS of updates.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 > > ___ > 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 ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] [QEMU-KVM] Centos guest VM freezing
On 1/9/19 11:50 AM, Akshar Kanak wrote: Hi Thanks for the reply We have seen the same guest VM freezing on vmware ESXi machine also , No wonder given that the guest remains 5 years out of date even when using a different hypervisor.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... 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 " http://bfy.tw/LhMS might help with that Regards, manuel Thanks and regards Akshar On Wed, Jan 9, 2019 at 1:58 PM Manuel Wolfshant mailto:wo...@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. ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] [QEMU-KVM] Centos guest VM freezing
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 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 > ___ > 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
Re: [CentOS-virt] [QEMU-KVM] Centos guest VM freezing
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 ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
