I would enable ksmtuned logging ,if it has been done verify logs
________________________________
From: centos-virt-bounces at centos.org <centos-virt-bounces at
centos.org> on behalf of Laurentiu Soica <laurentiu at soica.ro>
Sent: Tuesday, August 16, 2016 7:16 AM
To: Discussion about the virtualization on CentOS
Subject: Re: [CentOS-virt] Nested KVM issue
Yes. It is on both baremetal and compute node.
?n mar., 16 aug. 2016 la 13:37, Boris Derzhavets <bderzhavets at
hotmail.com<mailto:bderzhavets at hotmail.com>> a scris:
Is KSM enabled on your Compute Nodes ( presuming CentOS 7.2 on bare metal ) ?
________________________________
From: centos-virt-bounces at centos.org<mailto:centos-virt-bounces at
centos.org> <centos-virt-bounces at
centos.org<mailto:centos-virt-bounces at centos.org>> on behalf of
Laurentiu Soica <laurentiu at soica.ro<mailto:laurentiu at
soica.ro>>
Sent: Tuesday, August 16, 2016 5:25 AM
To: Discussion about the virtualization on CentOS
Subject: Re: [CentOS-virt] Nested KVM issue
Running the compute node for several days simply triggers it.
?n mar., 16 aug. 2016 la 12:12, Boris Derzhavets <bderzhavets at
hotmail.com<mailto:bderzhavets at hotmail.com>> a scris:
Sorry,
How you trigger the problem ?
B.
________________________________
From: centos-virt-bounces at centos.org<mailto:centos-virt-bounces at
centos.org> <centos-virt-bounces at
centos.org<mailto:centos-virt-bounces at centos.org>> on behalf of
Laurentiu Soica <laurentiu at soica.ro<mailto:laurentiu at
soica.ro>>
Sent: Tuesday, August 16, 2016 3:28 AM
To: Discussion about the virtualization on CentOS
Subject: Re: [CentOS-virt] Nested KVM issue
Hello,
The issue reproduced again and it doesn't look like a swap problem. Some
details:
on the baremetal, from top:
top - 08:08:52 up 5 days, 16:43, 3 users, load average: 36.19, 36.05, 36.05
Tasks: 493 total, 1 running, 492 sleeping, 0 stopped, 0 zombie
%Cpu(s): 3.5 us, 87.9 sy, 0.0 ni, 8.6 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 12357451+total, 14296000 free, 65634428 used, 43644088 buff/cache
KiB Swap: 4194300 total, 4073868 free, 120432 used. 56953888 avail Mem
19158 qemu 20 0 0.098t 0.041t 10476 S 3650 35.6 13048:24 qemu-kvm
The compute node has 36 CPUs and the usage is now 100%. There are more than 50
GB of memory still available on the baremetal. The swap is barely used, 120 MB.
On compute node, from top:
top - 05:11:58 up 1 day, 15:08, 2 users, load average: 40.46, 40.49, 40.74
%Cpu(s): 99.1 us, 0.7 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.1 si, 0.1 st
KiB Mem : 10296246+total, 78079936 free, 23671360 used, 1211160 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 78939968 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
6032 qemu 20 0 10.601g 1.272g 12964 S 400.0 1.3 588:40.39 qemu-kvm
5673 qemu 20 0 10.602g 1.006g 13020 S 399.7 1.0 1161:47 qemu-kvm
5998 qemu 20 0 10.601g 1.192g 13028 S 367.9 1.2 1544:30 qemu-kvm
5951 qemu 20 0 10.601g 1.246g 13020 S 348.3 1.3 1547:38 qemu-kvm
5750 qemu 20 0 10.599g 990136 13060 S 339.1 1.0 1152:25 qemu-kvm
5752 qemu 20 0 10.598g 1.426g 13040 S 313.9 1.5 663:13.65 qemu-kvm
....
There are more than 70 GB of memory available on the compute node. All VMs are
using 100% their CPUs and they are not accessible anymore.
Laurentiu
?n dum., 14 aug. 2016 la 21:44, Boris Derzhavets <bderzhavets at
hotmail.com<mailto:bderzhavets at hotmail.com>> a scris:
________________________________
From: centos-virt-bounces at centos.org<mailto:centos-virt-bounces at
centos.org> <centos-virt-bounces at
centos.org<mailto:centos-virt-bounces at centos.org>> on behalf of
Laurentiu Soica <laurentiu at soica.ro<mailto:laurentiu at
soica.ro>>
Sent: Sunday, August 14, 2016 10:17 AM
To: Discussion about the virtualization on CentOS
Subject: Re: [CentOS-virt] Nested KVM issue
More details on the subject:
I suppose it is a nested KVM issue because it raised after I enabled the nested
KVM feature. Without it, anyway, the second level VMs are unusable in terms of
performance.
I am using CentOS 7 with:
kernel: 3.10.0-327.22.2.el7.x86_64
qemu-kvm:1.5.3-105.el7_2.4
libvirt:1.2.17-13.el7_2.5
on both the baremetal and the compute VM.
Please, post
1) # virsh dumpxml VM-L1 ( where on L1 level you expect nested KVM to appear)
2) Login into VM-L1 and run :-
# lsmod | grep kvm
3) I need outputs from VM-L1 ( in case it is Compute Node )
# cat /etc/nova/nova.conf | grep virt_type
# cat /etc/nova/nova.conf | grep cpu_mode
Boris.
The only workaround now is to shutdown the compute VM and start it back from
baremetal with virsh start.
A simple restart of the compute node doesn't help. It looks like the
qemu-kvm process corresponding to the compute VM is the problem.
Laurentiu
?n dum., 14 aug. 2016 la 00:19, Laurentiu Soica <laurentiu at
soica.ro<mailto:laurentiu at soica.ro>> a scris:
Hello,
I have an OpenStack setup in virtual environment on CentOS 7.
The baremetal has nested KVM enabled and 1 compute node as a VM.
Inside the compute node I have multiple VMs running.
After about every 3 days the VMs get inaccessible and the compute node reports
high CPU usage. The qemu-kvm process for each VM inside the compute node reports
full CPU usage.
Please help me with some hints to debug this issue.
Thanks,
Laurentiu
_______________________________________________
CentOS-virt mailing list
CentOS-virt at centos.org<mailto:CentOS-virt at centos.org>
https://lists.centos.org/mailman/listinfo/centos-virt
_______________________________________________
CentOS-virt mailing list
CentOS-virt at centos.org<mailto:CentOS-virt at centos.org>
https://lists.centos.org/mailman/listinfo/centos-virt
_______________________________________________
CentOS-virt mailing list
CentOS-virt at centos.org<mailto:CentOS-virt at centos.org>
https://lists.centos.org/mailman/listinfo/centos-virt
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Enabled the logging on both compute and baremetal. Nothing strange in logs: on baremetal : Wed Aug 17 11:51:01 EEST 2016: committed 62310764 free 58501808 Wed Aug 17 11:51:01 EEST 2016: 87025667 < 123574516 and free > 24714903, stop ksm on compute: Wed Aug 17 08:52:52 UTC 2016: committed 24547132 free 76730936 Wed Aug 17 08:52:52 UTC 2016: 45139624 < 102962460 and free > 20592492, stop ksm and the compute node is again at 100% CPU utilization. ?n mar., 16 aug. 2016 la 15:26, Boris Derzhavets <bderzhavets at hotmail.com> a scris:> I would enable ksmtuned logging ,if it has been done verify logs > > > ------------------------------ > *From:* centos-virt-bounces at centos.org <centos-virt-bounces at centos.org> > on behalf of Laurentiu Soica <laurentiu at soica.ro> > *Sent:* Tuesday, August 16, 2016 7:16 AM > > *To:* Discussion about the virtualization on CentOS > *Subject:* Re: [CentOS-virt] Nested KVM issue > Yes. It is on both baremetal and compute node. > > ?n mar., 16 aug. 2016 la 13:37, Boris Derzhavets <bderzhavets at hotmail.com> > a scris: > >> Is KSM enabled on your Compute Nodes ( presuming CentOS 7.2 on bare >> metal ) ? >> >> >> ------------------------------ >> *From:* centos-virt-bounces at centos.org <centos-virt-bounces at centos.org> >> on behalf of Laurentiu Soica <laurentiu at soica.ro> >> *Sent:* Tuesday, August 16, 2016 5:25 AM >> >> *To:* Discussion about the virtualization on CentOS >> *Subject:* Re: [CentOS-virt] Nested KVM issue >> Running the compute node for several days simply triggers it. >> >> ?n mar., 16 aug. 2016 la 12:12, Boris Derzhavets <bderzhavets at hotmail.com> >> a scris: >> >>> Sorry, >>> >>> How you trigger the problem ? >>> >>> B. >>> >>> >>> ------------------------------ >>> *From:* centos-virt-bounces at centos.org <centos-virt-bounces at centos.org> >>> on behalf of Laurentiu Soica <laurentiu at soica.ro> >>> *Sent:* Tuesday, August 16, 2016 3:28 AM >>> >>> *To:* Discussion about the virtualization on CentOS >>> *Subject:* Re: [CentOS-virt] Nested KVM issue >>> Hello, >>> >>> The issue reproduced again and it doesn't look like a swap problem. Some >>> details: >>> >>> on the baremetal, from top: >>> >>> top - 08:08:52 up 5 days, 16:43, 3 users, load average: 36.19, 36.05, >>> 36.05 >>> Tasks: 493 total, 1 running, 492 sleeping, 0 stopped, 0 zombie >>> >>> %Cpu(s): 3.5 us, 87.9 sy, 0.0 ni, 8.6 id, 0.0 wa, 0.0 hi, 0.0 si, >>> 0.0 st >>> KiB Mem : 12357451+total, 14296000 free, 65634428 used, 43644088 >>> buff/cache >>> KiB Swap: 4194300 total, 4073868 free, 120432 used. 56953888 avail >>> Mem >>> >>> 19158 qemu 20 0 0.098t 0.041t 10476 S 3650 35.6 13048:24 >>> qemu-kvm >>> >>> The compute node has 36 CPUs and the usage is now 100%. There are more >>> than 50 GB of memory still available on the baremetal. The swap is barely >>> used, 120 MB. >>> >>> On compute node, from top: >>> >>> top - 05:11:58 up 1 day, 15:08, 2 users, load average: 40.46, 40.49, >>> 40.74 >>> >>> %Cpu(s): 99.1 us, 0.7 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.1 si, >>> 0.1 st >>> KiB Mem : 10296246+total, 78079936 free, 23671360 used, 1211160 >>> buff/cache >>> KiB Swap: 0 total, 0 free, 0 used. 78939968 avail >>> Mem >>> >>> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ >>> COMMAND >>> 6032 qemu 20 0 10.601g 1.272g 12964 S 400.0 1.3 588:40.39 >>> qemu-kvm >>> 5673 qemu 20 0 10.602g 1.006g 13020 S 399.7 1.0 1161:47 >>> qemu-kvm >>> 5998 qemu 20 0 10.601g 1.192g 13028 S 367.9 1.2 1544:30 >>> qemu-kvm >>> 5951 qemu 20 0 10.601g 1.246g 13020 S 348.3 1.3 1547:38 >>> qemu-kvm >>> 5750 qemu 20 0 10.599g 990136 13060 S 339.1 1.0 1152:25 >>> qemu-kvm >>> 5752 qemu 20 0 10.598g 1.426g 13040 S 313.9 1.5 663:13.65 >>> qemu-kvm >>> .... >>> >>> There are more than 70 GB of memory available on the compute node. All >>> VMs are using 100% their CPUs and they are not accessible anymore. >>> >>> Laurentiu >>> >>> ?n dum., 14 aug. 2016 la 21:44, Boris Derzhavets < >>> bderzhavets at hotmail.com> a scris: >>> >>>> >>>> >>>> >>>> ------------------------------ >>>> *From:* centos-virt-bounces at centos.org <centos-virt-bounces at centos.org> >>>> on behalf of Laurentiu Soica <laurentiu at soica.ro> >>>> *Sent:* Sunday, August 14, 2016 10:17 AM >>>> *To:* Discussion about the virtualization on CentOS >>>> *Subject:* Re: [CentOS-virt] Nested KVM issue >>>> >>>> More details on the subject: >>>> >>>> I suppose it is a nested KVM issue because it raised after I enabled >>>> the nested KVM feature. Without it, anyway, the second level VMs are >>>> unusable in terms of performance. >>>> >>>> I am using CentOS 7 with: >>>> >>>> kernel: 3.10.0-327.22.2.el7.x86_64 >>>> qemu-kvm:1.5.3-105.el7_2.4 >>>> libvirt:1.2.17-13.el7_2.5 >>>> >>>> on both the baremetal and the compute VM. >>>> >>>> *Please, post* >>>> >>>> 1) # virsh dumpxml VM-L1 ( where on L1 level you expect nested KVM to >>>> appear) >>>> 2) Login into VM-L1 and run :- >>>> # lsmod | grep kvm >>>> 3) I need outputs from VM-L1 ( in case it is Compute Node ) >>>> >>>> # cat /etc/nova/nova.conf | grep virt_type >>>> # cat /etc/nova/nova.conf | grep cpu_mode >>>> >>>> Boris. >>>> >>>> >>>> >>>> >>>> >>>> The only workaround now is to shutdown the compute VM and start it back >>>> from baremetal with virsh start. >>>> A simple restart of the compute node doesn't help. It looks like the >>>> qemu-kvm process corresponding to the compute VM is the problem. >>>> >>>> Laurentiu >>>> >>>> ?n dum., 14 aug. 2016 la 00:19, Laurentiu Soica <laurentiu at soica.ro> a >>>> scris: >>>> >>>>> Hello, >>>>> >>>>> I have an OpenStack setup in virtual environment on CentOS 7. >>>>> >>>>> The baremetal has *nested KVM* enabled and 1 compute node as a VM. >>>>> >>>>> Inside the compute node I have multiple VMs running. >>>>> >>>>> After about every 3 days the VMs get inaccessible and the compute node >>>>> reports high CPU usage. The qemu-kvm process for each VM inside the compute >>>>> node reports full CPU usage. >>>>> >>>>> Please help me with some hints to debug this issue. >>>>> >>>>> Thanks, >>>>> Laurentiu >>>>> >>>> _______________________________________________ >>>> CentOS-virt mailing list >>>> CentOS-virt at centos.org >>>> https://lists.centos.org/mailman/listinfo/centos-virt >>>> >>> _______________________________________________ >>> CentOS-virt mailing list >>> CentOS-virt at centos.org >>> https://lists.centos.org/mailman/listinfo/centos-virt >>> >> _______________________________________________ >> CentOS-virt mailing list >> CentOS-virt at centos.org >> https://lists.centos.org/mailman/listinfo/centos-virt >> > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20160817/2b6548a2/attachment-0002.html>
It sounds weird, but attempt to disable KSM and see would it help or no ?
________________________________
From: centos-virt-bounces at centos.org <centos-virt-bounces at
centos.org> on behalf of Laurentiu Soica <laurentiu at soica.ro>
Sent: Wednesday, August 17, 2016 4:56 AM
To: Discussion about the virtualization on CentOS
Subject: Re: [CentOS-virt] Nested KVM issue
Enabled the logging on both compute and baremetal. Nothing strange in logs:
on baremetal :
Wed Aug 17 11:51:01 EEST 2016: committed 62310764 free 58501808
Wed Aug 17 11:51:01 EEST 2016: 87025667 < 123574516 and free > 24714903,
stop ksm
on compute:
Wed Aug 17 08:52:52 UTC 2016: committed 24547132 free 76730936
Wed Aug 17 08:52:52 UTC 2016: 45139624 < 102962460 and free > 20592492,
stop ksm
and the compute node is again at 100% CPU utilization.
?n mar., 16 aug. 2016 la 15:26, Boris Derzhavets <bderzhavets at
hotmail.com<mailto:bderzhavets at hotmail.com>> a scris:
I would enable ksmtuned logging ,if it has been done verify logs
________________________________
From: centos-virt-bounces at centos.org<mailto:centos-virt-bounces at
centos.org> <centos-virt-bounces at
centos.org<mailto:centos-virt-bounces at centos.org>> on behalf of
Laurentiu Soica <laurentiu at soica.ro<mailto:laurentiu at
soica.ro>>
Sent: Tuesday, August 16, 2016 7:16 AM
To: Discussion about the virtualization on CentOS
Subject: Re: [CentOS-virt] Nested KVM issue
Yes. It is on both baremetal and compute node.
?n mar., 16 aug. 2016 la 13:37, Boris Derzhavets <bderzhavets at
hotmail.com<mailto:bderzhavets at hotmail.com>> a scris:
Is KSM enabled on your Compute Nodes ( presuming CentOS 7.2 on bare metal ) ?
________________________________
From: centos-virt-bounces at centos.org<mailto:centos-virt-bounces at
centos.org> <centos-virt-bounces at
centos.org<mailto:centos-virt-bounces at centos.org>> on behalf of
Laurentiu Soica <laurentiu at soica.ro<mailto:laurentiu at
soica.ro>>
Sent: Tuesday, August 16, 2016 5:25 AM
To: Discussion about the virtualization on CentOS
Subject: Re: [CentOS-virt] Nested KVM issue
Running the compute node for several days simply triggers it.
?n mar., 16 aug. 2016 la 12:12, Boris Derzhavets <bderzhavets at
hotmail.com<mailto:bderzhavets at hotmail.com>> a scris:
Sorry,
How you trigger the problem ?
B.
________________________________
From: centos-virt-bounces at centos.org<mailto:centos-virt-bounces at
centos.org> <centos-virt-bounces at
centos.org<mailto:centos-virt-bounces at centos.org>> on behalf of
Laurentiu Soica <laurentiu at soica.ro<mailto:laurentiu at
soica.ro>>
Sent: Tuesday, August 16, 2016 3:28 AM
To: Discussion about the virtualization on CentOS
Subject: Re: [CentOS-virt] Nested KVM issue
Hello,
The issue reproduced again and it doesn't look like a swap problem. Some
details:
on the baremetal, from top:
top - 08:08:52 up 5 days, 16:43, 3 users, load average: 36.19, 36.05, 36.05
Tasks: 493 total, 1 running, 492 sleeping, 0 stopped, 0 zombie
%Cpu(s): 3.5 us, 87.9 sy, 0.0 ni, 8.6 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 12357451+total, 14296000 free, 65634428 used, 43644088 buff/cache
KiB Swap: 4194300 total, 4073868 free, 120432 used. 56953888 avail Mem
19158 qemu 20 0 0.098t 0.041t 10476 S 3650 35.6 13048:24 qemu-kvm
The compute node has 36 CPUs and the usage is now 100%. There are more than 50
GB of memory still available on the baremetal. The swap is barely used, 120 MB.
On compute node, from top:
top - 05:11:58 up 1 day, 15:08, 2 users, load average: 40.46, 40.49, 40.74
%Cpu(s): 99.1 us, 0.7 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.1 si, 0.1 st
KiB Mem : 10296246+total, 78079936 free, 23671360 used, 1211160 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 78939968 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
6032 qemu 20 0 10.601g 1.272g 12964 S 400.0 1.3 588:40.39 qemu-kvm
5673 qemu 20 0 10.602g 1.006g 13020 S 399.7 1.0 1161:47 qemu-kvm
5998 qemu 20 0 10.601g 1.192g 13028 S 367.9 1.2 1544:30 qemu-kvm
5951 qemu 20 0 10.601g 1.246g 13020 S 348.3 1.3 1547:38 qemu-kvm
5750 qemu 20 0 10.599g 990136 13060 S 339.1 1.0 1152:25 qemu-kvm
5752 qemu 20 0 10.598g 1.426g 13040 S 313.9 1.5 663:13.65 qemu-kvm
....
There are more than 70 GB of memory available on the compute node. All VMs are
using 100% their CPUs and they are not accessible anymore.
Laurentiu
?n dum., 14 aug. 2016 la 21:44, Boris Derzhavets <bderzhavets at
hotmail.com<mailto:bderzhavets at hotmail.com>> a scris:
________________________________
From: centos-virt-bounces at centos.org<mailto:centos-virt-bounces at
centos.org> <centos-virt-bounces at
centos.org<mailto:centos-virt-bounces at centos.org>> on behalf of
Laurentiu Soica <laurentiu at soica.ro<mailto:laurentiu at
soica.ro>>
Sent: Sunday, August 14, 2016 10:17 AM
To: Discussion about the virtualization on CentOS
Subject: Re: [CentOS-virt] Nested KVM issue
More details on the subject:
I suppose it is a nested KVM issue because it raised after I enabled the nested
KVM feature. Without it, anyway, the second level VMs are unusable in terms of
performance.
I am using CentOS 7 with:
kernel: 3.10.0-327.22.2.el7.x86_64
qemu-kvm:1.5.3-105.el7_2.4
libvirt:1.2.17-13.el7_2.5
on both the baremetal and the compute VM.
Please, post
1) # virsh dumpxml VM-L1 ( where on L1 level you expect nested KVM to appear)
2) Login into VM-L1 and run :-
# lsmod | grep kvm
3) I need outputs from VM-L1 ( in case it is Compute Node )
# cat /etc/nova/nova.conf | grep virt_type
# cat /etc/nova/nova.conf | grep cpu_mode
Boris.
The only workaround now is to shutdown the compute VM and start it back from
baremetal with virsh start.
A simple restart of the compute node doesn't help. It looks like the
qemu-kvm process corresponding to the compute VM is the problem.
Laurentiu
?n dum., 14 aug. 2016 la 00:19, Laurentiu Soica <laurentiu at
soica.ro<mailto:laurentiu at soica.ro>> a scris:
Hello,
I have an OpenStack setup in virtual environment on CentOS 7.
The baremetal has nested KVM enabled and 1 compute node as a VM.
Inside the compute node I have multiple VMs running.
After about every 3 days the VMs get inaccessible and the compute node reports
high CPU usage. The qemu-kvm process for each VM inside the compute node reports
full CPU usage.
Please help me with some hints to debug this issue.
Thanks,
Laurentiu
_______________________________________________
CentOS-virt mailing list
CentOS-virt at centos.org<mailto:CentOS-virt at centos.org>
https://lists.centos.org/mailman/listinfo/centos-virt
_______________________________________________
CentOS-virt mailing list
CentOS-virt at centos.org<mailto:CentOS-virt at centos.org>
https://lists.centos.org/mailman/listinfo/centos-virt
_______________________________________________
CentOS-virt mailing list
CentOS-virt at centos.org<mailto:CentOS-virt at centos.org>
https://lists.centos.org/mailman/listinfo/centos-virt
_______________________________________________
CentOS-virt mailing list
CentOS-virt at centos.org<mailto:CentOS-virt at centos.org>
https://lists.centos.org/mailman/listinfo/centos-virt
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