XCP-ng host restarts at random intervals

olivierlambert

Thanks for keeping us posted

splastunov

Hello!

Are all VMs on this host belongs to you and you certainly know what processes running on them?

I had same issue with Dell R630.
The solution was to update to latest BIOS.
I think that some clients ran some software that triggered some bug and host rebooted.

XCP-ng security updates does not helped.
In my case only BIOS update fixed suddenly crushes.

So the work around will be to move VMs one by one to another host and check if it will solve the problem.

christopher-petzel

@splastunov Yes, all VMs are for in-house use and all were built by me personally.

I have previously followed the same steps that you followed in your case. I updated the BIOS on the host server and moved VMs one by one.

Moving VMs one by one is how I eventually found that I only had the problem when a Windows Server VM was on the host. When I had this problem occur with a fresh Windows Server 2022 VM which had no applications installed, I started to suspect that it was related to Windows. I was then able to confirm that this only occurred with Windows VMs.

Thanks for the info. I think these are great steps toward finding the problem.

olivierlambert

The /var/crash folder might also being interesting (Dom0.log and Xen log to see who is triggering the crash)

christopher-petzel

I believe I have the definitive cause for this 'random host reboot' issue.

After 6 months of problem-free operation, I have experienced the host reboot issue again on this server. The host was running only Linux VMs, so the theory of Windows VMs on the host contributing to the reboot issue has proven false. As with each time before, there are no indications in any relevant log files that the host is going to reboot. I think at this point I can definitively say that the reboot is caused by a faulty SuperMicro motherboard.

I've learned my lesson: use HPE servers! This SuperMicro system will be melted down for scrap.

olivierlambert

Thanks for the feedback

Well, at least keep us posted if you have the same issue with another hardware, we'll be happy to help

Chmura

Hi @olivierlambert
Now, I have the same problem on 4 servers. Machines reset every few hours!!! Please HELP.

The machines have been running stably since:

reboot system boot 4.19.0+1 Wed Dec 28 12:30 - 05:50 (217+16:19)

Since then, the following patches have been installed but not restarted:

May 16 09:07:40 Updated: xen-libs-4.13.5-9.30.3.xcpng8.2.x86_64
May 16 09:07:41 Updated: guest-templates-json-1.9.6-1.2.xcpng8.2.noarch
May 16 09:07:41 Updated: xcp-ng-release-presets-8.2.1-6.x86_64
May 16 09:07:41 Updated: xen-hypervisor-4.13.5-9.30.3.xcpng8.2.x86_64
May 16 09:07:42 Updated: xen-dom0-libs-4.13.5-9.30.3.xcpng8.2.x86_64
May 16 09:07:43 Updated: xen-tools-4.13.5-9.30.3.xcpng8.2.x86_64
May 16 09:07:44 Updated: xen-dom0-tools-4.13.5-9.30.3.xcpng8.2.x86_64
May 16 09:07:48 Updated: xcp-ng-release-config-8.2.1-6.x86_64
May 16 09:07:49 Updated: xcp-ng-release-8.2.1-6.x86_64
May 16 09:07:49 Updated: guest-templates-json-data-other-1.9.6-1.2.xcpng8.2.noarch
May 16 09:07:50 Updated: guest-templates-json-data-linux-1.9.6-1.2.xcpng8.2.noarch
May 16 09:07:50 Updated: guest-templates-json-data-windows-1.9.6-1.2.xcpng8.2.noarch
May 16 09:07:51 Updated: sudo-1.8.23-10.el7_9.3.x86_64
May 16 09:08:01 Updated: linux-firmware-20190314-5.1.xcpng8.2.noarch
May 16 09:08:03 Updated: 2:microcode_ctl-2.1-26.xs23.1.xcpng8.2.x86_64
May 29 06:57:47 Updated: xen-libs-4.13.5-9.31.1.xcpng8.2.x86_64
May 29 06:57:48 Updated: xcp-ng-release-presets-8.2.1-9.x86_64
May 29 06:57:49 Updated: message-switch-1.23.2-4.1.xcpng8.2.x86_64
May 29 06:57:50 Updated: forkexecd-1.18.1-2.1.xcpng8.2.x86_64
May 29 06:57:50 Updated: xen-hypervisor-4.13.5-9.31.1.xcpng8.2.x86_64
May 29 06:57:51 Updated: xen-dom0-libs-4.13.5-9.31.1.xcpng8.2.x86_64
May 29 06:57:56 Updated: 2:qemu-4.2.1-4.6.3.1.xcpng8.2.x86_64
May 29 06:58:00 Updated: xen-tools-4.13.5-9.31.1.xcpng8.2.x86_64
May 29 06:58:01 Updated: xen-dom0-tools-4.13.5-9.31.1.xcpng8.2.x86_64
May 29 06:58:03 Updated: xenopsd-0.150.14-1.1.xcpng8.2.x86_64
May 29 06:58:03 Updated: xenopsd-cli-0.150.14-1.1.xcpng8.2.x86_64
May 29 06:58:05 Updated: xenopsd-xc-0.150.14-1.1.xcpng8.2.x86_64
May 29 06:58:06 Updated: gpumon-0.18.0-4.3.xcpng8.2.x86_64
May 29 06:58:06 Updated: xcp-rrdd-1.33.2-1.1.xcpng8.2.x86_64
May 29 06:58:08 Updated: rrdd-plugins-1.10.8-5.2.xcpng8.2.x86_64
May 29 06:58:09 Updated: xapi-tests-1.249.28-1.2.xcpng8.2.x86_64
May 29 06:58:13 Updated: xapi-core-1.249.28-1.2.xcpng8.2.x86_64
May 29 06:58:16 Updated: sm-2.30.8-2.1.xcpng8.2.x86_64
May 29 06:58:20 Updated: xcp-ng-release-config-8.2.1-9.x86_64
May 29 06:58:21 Updated: xcp-ng-release-8.2.1-9.x86_64
May 29 06:58:22 Updated: 2:microcode_ctl-2.1-26.xs25.1.xcpng8.2.x86_64
May 29 06:58:28 Updated: linux-firmware-20190314-7.1.xcpng8.2.noarch
May 29 06:58:33 Updated: xapi-xe-1.249.28-1.2.xcpng8.2.x86_64
May 29 06:58:34 Updated: varstored-guard-0.6.2-2.xcpng8.2.x86_64
May 29 06:58:35 Updated: xcp-networkd-0.56.2-2.xcpng8.2.x86_64
May 29 06:58:36 Updated: sm-rawhba-2.30.8-2.1.xcpng8.2.x86_64
Jul 28 10:10:40 Updated: xen-libs-4.13.5-9.34.1.xcpng8.2.x86_64
Jul 28 10:10:41 Updated: xen-hypervisor-4.13.5-9.34.1.xcpng8.2.x86_64
Jul 28 10:10:42 Updated: xen-dom0-libs-4.13.5-9.34.1.xcpng8.2.x86_64
Jul 28 10:10:42 Updated: xen-tools-4.13.5-9.34.1.xcpng8.2.x86_64
Jul 28 10:10:44 Updated: xen-dom0-tools-4.13.5-9.34.1.xcpng8.2.x86_64
Jul 28 10:10:54 Updated: linux-firmware-20190314-8.1.xcpng8.2.noarch

Yesterday morning at 5:30 to 5:50 I reset the all servers (zenbleed patch), since then i have random reboots on all 4 servers.

server1: 2x AMD EPYC 7282, ASUS Mainboard

reboot   system boot  4.19.0+1         Thu Aug  3 10:57 - 13:25 (1+02:27)   
reboot   system boot  4.19.0+1         Thu Aug  3 07:33 - 13:25 (1+05:51)
reboot   system boot  4.19.0+1         Thu Aug  3 05:57 - 13:25 (1+07:27)   
reboot   system boot  4.19.0+1         Thu Aug  3 05:36 - 13:25 (1+07:48)

serwer2: 2x AMD EPYC 7282, ASUS Mainboard

reboot   system boot  4.19.0+1         Fri Aug  4 13:07 - 13:25  (00:18)    
reboot   system boot  4.19.0+1         Fri Aug  4 00:21 - 13:25  (13:04)    
reboot   system boot  4.19.0+1         Thu Aug  3 07:51 - 13:25 (1+05:34)
reboot   system boot  4.19.0+1         Thu Aug  3 05:55 - 13:25 (1+07:30)

Server3: 2x AMD EPYC 7282, Supermicro Mainboard

reboot   system boot  4.19.0+1         Fri Aug  4 13:07 - 13:14  (00:06)    
reboot   system boot  4.19.0+1         Fri Aug  4 00:21 - 13:14  (12:53)    
reboot   system boot  4.19.0+1         Thu Aug  3 07:51 - 13:14 (1+05:23)   
reboot   system boot  4.19.0+1         Thu Aug  3 05:55 - 13:14 (1+07:19)

server4: 2x AMD EPYC 7282, Supermicro Mainboard

reboot   system boot  4.19.0+1         Fri Aug  4 00:33 - 13:26  (12:52)    
reboot   system boot  4.19.0+1         Thu Aug  3 05:46 - 13:26 (1+07:40)

What can I provide you to solve the problem.

Hardware issues ruled out, power supply also OK (2 power supplies, 2 independent outlets).

In /var/crash i have old file

ls -al /var/crash/
-rw-r--r--  1 root root 67108864 2022-12-28  .sacrificial-space-for-logs

When one server restarted, I catch It and that was a full machine restart POST BIOS.

Please help

Danp

@Chmura There's a pending fix for a problem with the zenbleed patch. You may want to test it out to see if it resolves your rebooting issue. See here for more details.

Chmura

@Danp said in XCP-ng host restarts at random intervals:

@Chmura There's a pending fix for a problem with the zenbleed patch. You may want to test it out to see if it resolves your rebooting issue. See here for more details.

Thanks for fast reply.

Now for test on serwer3 i downgrade this package:

yum downgrade linux-firmware-20190314-5.1.xcpng8.2.noarch

And I will test stability.

On serwer4 i downgrade all packages to my 27.12.2022 state:

xen-libs-4.13.4-9.28.1.xcpng8.2.x86_64
message-switch-1.23.2-3.2.xcpng8.2.x86_64
forkexecd-1.18.1-1.1.xcpng8.2.x86_64
vhd-tool-0.43.0-4.1.xcpng8.2.x86_64
1:xs-openssl-libs-1.1.1k-6.1.xcpng8.2.x86_64
xen-hypervisor-4.13.4-9.28.1.xcpng8.2.x86_64
xen-dom0-libs-4.13.4-9.28.1.xcpng8.2.x86_64
2:qemu-4.2.1-4.6.2.1.xcpng8.2.x86_64
xen-tools-4.13.4-9.28.1.xcpng8.2.x86_64
edk2-20180522git4b8552d-1.4.6.xcpng8.2.x86_64
xen-dom0-tools-4.13.4-9.28.1.xcpng8.2.x86_64
xenopsd-0.150.12-1.2.xcpng8.2.x86_64
xenopsd-xc-0.150.12-1.2.xcpng8.2.x86_64
xenopsd-cli-0.150.12-1.2.xcpng8.2.x86_64
xcp-rrdd-1.33.0-6.1.xcpng8.2.x86_64
squeezed-0.27.0-5.xcpng8.2.x86_64
rrdd-plugins-1.10.8-5.1.xcpng8.2.x86_64
gpumon-0.18.0-4.2.xcpng8.2.x86_64
xapi-tests-1.249.26-2.1.xcpng8.2.x86_64
blktap-3.37.4-1.0.1.xcpng8.2.x86_64
xapi-core-1.249.26-2.1.xcpng8.2.x86_64
2:microcode_ctl-2.1-26.xs23.xcpng8.2.x86_64
sm-rawhba-2.30.7-1.3.xcpng8.2.x86_64
rrd2csv-1.2.5-7.1.xcpng8.2.x86_64
kernel-4.19.19-7.0.15.1.xcpng8.2.x86_64
xapi-xe-1.249.26-2.1.xcpng8.2.x86_64
xcp-networkd-0.56.2-1.xcpng8.2.x86_64
openvswitch-2.5.3-2.3.12.1.xcpng8.2.x86_64
xapi-storage-script-0.34.1-2.1.xcpng8.2.x86_64
varstored-guard-0.6.2-1.xcpng8.2.x86_64
sm-2.30.7-1.3.xcpng8.2.x86_64
sm-cli-0.23.0-7.xcpng8.2.x86_64
xcp-ng-xapi-plugins-1.7.2-1.xcpng8.2.noarch
linux-firmware-20190314-5.xcpng8.2.noarch
xapi-nbd-1.11.0-3.2.xcpng8.2.x86_64
xcp-ng-pv-tools-8.2.0-11.xcpng8.2.noarch

Now I will evacuate all VMs from server2 to server3/4 and check the microcode package from xcp-ng-testing repo.
We'll see what comes out when i use yum update "xen-*" --enablerepo=xcp-ng-testing
Funny weekend

Edit: Server3 was restarted at 9PM ;(
Server 4 and update Server2 (xen-... 4.13.5-9.35.1.xcp ng 8.2) still working,

olivierlambert

We have released new patches last Friday, double check to be fully up to date and reboot

tjkreidl

@christopher-petzel Sometimes this can happen if the host and VMs do not use the same NTPP server(s) or are not syncing properly with them, and therefore fail to keep the times all properly synchronized. I'd check to make sure all are in sync.

Toni

I also have the reboot problem.
It only occurs for me when a USB hard drive is connected.
If there is no hard drive connected to the USB interfaces, the system will run stable for months / years.

Today I had to read data into a VM via USB hard drive, so I connected one.
I haven't had any problems during the data transfer so far. Only when the USB hard drive is no longer used and is still connected..

Please check whether something is connected via USB on the systems that have the reboot problem.

I've had this problem on other systems too. But it never bothered me because I don't normally have anything connected to the USB ports.
I also had the reboot problem in earlier versions of xcp-ng or Xenserver and it also occurred on HP servers that I used before I switched to Supermicro.
I have been using Xenserver since version 5.0.

Mainboard: Supermicro H11SSL-i BIOS 2.4
CPU: Epyc 7551P

olivierlambert

@Toni said in XCP-ng host restarts at random intervals:

Please check whether something is connected via USB on the systems that have the reboot problem.

Hi! It's a community forum here So it's a bit more up to you to demonstrate the bug by investigate a bit more and digging the logs, otherwise if you want an investigation on your setup, then pro support is more fit. If you want to take a look on what logs to check, take a look at https://docs.xcp-ng.org/troubleshooting/