XCP-ng 8.2 updates announcements and testing

stormi

A bugfix kernel update available for testing

Based on Citrix's hotfix XS82E030, here's a bugfix kernel update. I don't think it will change much for most hosts, except in some specific cases.

What changed

Previous kernel updates (that fixed network performance issues for FreeBSD and sometimes other VMs), may have reduced the performance in some situation according to Citrix. Based on the patches, it looks like it's related to IRQ affinity and cross-domain networking. Here's the patch: https://github.com/xcp-ng-rpms/kernel/blob/master/SOURCES/0001-xen-events-fix-setting-irq-affinity.patch
Tools that need to make the ioperm syscall were crashing on dom0. For example Supermicro Update Manager (SUM). This should fix it.
An additional dependency was added to the perf RPM (not installed by default) to make it able to do backtraces when you try to run it on binaries in dom0.
A patch fixes CVE-2021-29154 was added. It's not considered a security update because it does not fix an exploitable vulnerability. It's extra defence in depth.

How to update (XCP-ng 8.2 only)

yum update kernel --enablerepo=xcp-ng-testing

Version that should be installed: 4.19.19-7.0.12.1.xcpng8.2

What to test

Installation of the update, normal use, no obvious regressions...

Plus the changes described above if you're in a situation that allows it.

Test window before release

None defined at the moment. As it's not a security update, I'll wait for more updates to be ready before I push the next train officially. But feedback is always useful as soon as it can be provided.

gskger

@stormi A lazy sunday morning, some coffee, a notebook and time for testing. Updated my two host playlab (DELL Optiplex 9010, 8.2 fully patched) and tested Debian VMs and Windows 10 VMs (create, live migrate with/-out guest tools, start/stop/reboot, snapshot with/-out RAM and revert, online-/offline storage migrate from/to shared and local SR). Restored a Windows 10 and a Debian VM from backup. All good so far for this regression test.

JCastang

Hello, @stormi I did a quick test because we encounter in some cases "bad' network perfs on our pools (with Intel 10GB network cards) such as :

VXLAN network are getting max 2.5Gbps of bandwidth
VM to VM network with a BSD firewall in the middle getting max 2.5Gbps of bandwidth

But VM to VM (on same LAN) are getting near 10Gbps.

Testing this new kernel does not change anything on BP for theses cases.
BP still stuck at 2,5Gbps.

stormi

@jcastang AFAIK there's still room for improvement regarding network perfs in *BSD VMs, but I doubt the update was meant to address this. If you want to discuss it further, please create a new thread.

stormi

A bugfix update for USB passthrough

A fix was contributed by @jeremfg to the XAPI project, so that when XAPI calls usb_reset.py with the -r switch it does not fail anymore. This fixes passing through both a PCI device and an USB device to a VM, and could also fix other USB passthrough issues that raised the same error: "usage: usb_reset.py attach [-h] -d DOMID -p PID [-r RESET_ONLY] device\nusb_reset.py attach: error: argument -r: expected one argument\n".

Related thread: https://xcp-ng.org/forum/topic/3594/pci-passthrough-usb-passthrough-does-not-work-together

Related issues:

I have built patched XAPI packages for XCP-ng 8.2 that are available for testing.

How to update (XCP-ng 8.2 only)

yum update xapi-core xapi-tests xapi-xe --enablerepo=xcp-ng-testing
xe-toolstack-restart

You should get version-release 1.249.9-1.2.xcpng8.2

What to test

USB passthrough:

What used to work should still work
What did not work, if the error message in the logs is the one quoted above, should now work... Or maybe fail further in cases that haven't been tested yet?

Test window before release

None defined at the moment. As it's not a security update, I'll wait for more updates to be ready before I push the next train officially. But feedback is always useful as soon as it can be provided

AdrianFretwell created this issue in xcp-ng/xcp

closed Starting a VM with USB passthrough results in Internal Server Error #108

jeremfg created this issue in xcp-ng/xcp

closed USB+PCI Passthrough combined, vm boot fails #511

stormi

I created a dedicated thread for the testing of Guest Secure Boot support: https://xcp-ng.org/forum/post/41541

See you there.

And a reminder about the current update candidates that are in testing in the current thread:

... with my interest being geared mainly towards regression testing.

stormi

New toolstack (XAPI) update candidate for 8.2

Based on Citrix's hotfix XS82E031. Also includes the USB passthrough bugfix mentioned above in this thread.

What changed

Fixes

USB passthrough fix
Reduced log verbosity for stunnel, to prevent xapi-ssl.log from growing so fast that it could fill the /var/log partition entirely in some cases (users from HA-lizard had reported such behaviour and we were waiting for this upstream fix from the XAPI project to be included in a hotfix).
Fix xe vm-reset-powerstate for VMs with GPU passthrough that are stuck in paused state.
Other fixes for rare issues (see hotfix description).

Features

The hotfix from Citrix also comes with a few improvements. Quoting (the highlight in bold characters is mine):

Adds a default boot order for VMs.

Improved error messaging for when the graphics card is not configured for SRIOV.

Remove HTTP access to the management network static web page. This web page can now only be accessed through HTTPS.

Adds additional snapshots of glocktop data to the bugtool output.

How to update (XCP-ng 8.2 only)

yum clean metadata --enablerepo=xcp-ng-testing
yum update forkexecd message-switch xapi-core xapi-tests xapi-xe xcp-rrdd xenopsd xenopsd-cli xenopsd-xc --enablerepo=xcp-ng-testing
xe-toolstack-restart # or reboot to be 100% sure everything restarted

What to test

No obvious regressions, and if possible the changes described above.

Test window before release

A few weeks, but the quicker the better, as this kind of message tends to be forgotten over time.

Other update candidates still in testing phase

The kernel bugfix update is still in testing phase. Many thanks to those who already tested it, and I'm still eager for feedback from others: https://xcp-ng.org/forum/post/41241

ethanjosephscott

@stormi
Got these applied too fast.
Http does seem disabled
stunnel logging does seem drastically reduced well know more as time goes on.
I do see a boot order section for VM properties and tested this out be booting into a livecd on a VM.
I ran the bugtool but without knowing what was added I can't confirm or deny this one.

HeMaN

@stormi said in Updates announcements and testing:

Have a installation without any of the fixed bugs, but Installed the updates on my system and did the toolstack restart.

No issues to report this far.

stormi

There are at least two blocking issues with this update candidate, so we'll retain it until they are fixed:

HTTP 403 errors on port 443. Easily reproduced: just load XCP-ng's web page over HTTPS, most images and scripts don't load. We debugged it and reported it to the XAPI project: https://github.com/xapi-project/xen-api/issues/4517
HA Lizard users reported issues connecting to XAPI. I don't know yet whether the fix belongs in XAPI or in HA Lizard itself. Wait and see.

stormi created this issue in xapi-project/xen-api

closed Bogus HTTP 403 errors after hotfix XS82E031 for valid HTTPS requests #4517

stormi

New security updates (xen)

Citrix security bulletin: https://support.citrix.com/article/CTX325319

Impact: privileged code in a guest VM may crash or compromise a host.

Test on XCP-ng 8.2

yum clean metadata --enablerepo=xcp-ng-testing
yum update xen-dom0-libs xen-dom0-tools xen-hypervisor xen-libs xen-tools --enablerepo=xcp-ng-testing
reboot

Version for xen packages: 4.13.1-9.12.1.xcpng8.2

What to test

The main goal is to avoid obvious regressions, so test whatever you want. The closer to your actual use of XCP-ng, the better.

Test window before official release of the updates

24h.

JeffBerntsen

@stormi Running well for me. I've tested startup, shutdown, and migration of Windows and Linux VMs with no obvious regressions.

gskger

@stormi No issue with updating my two host playlab. Just run some simple tests with Debian VMs (create, live migrate with/-out 7.20.0-9 guest tools, start/stop/reboot, snapshot with/-out RAM and revert, online-/offline storage migrate from/to shared and local SR, restore from backup). Restored a Windows 10 VM from backup as well and moved it around a bit. Everything works as expected.

cg

Any info about support of Windows Server 2022. RTM (final) version has been released ~2 weeks ago.

cnaumer

@stormi Also installed on our test-lab and booting, migrating of RockyLinux and Windows VMs works as expected.

stormi

@cg I've not heard of it yet on Citrix side. Meanwhile the template for 2019 should be enough. IIRC @Darkbeldin has tested Windows Server 2022 regularly during the pre-release phase.

cg

@stormi sounds good. I was guessing that 2019 might do the job. Tempted to use 2022 on a fresh installation and not use the "old" 2019. (Thanks!)

HeMaN

@stormi Installed on my testlab, no issues

stormi

The security update is now live. Thank you everyone for the prompt feedback in this short timeframe!

https://xcp-ng.org/blog/2021/09/10/september-2021-security-update/

HeMaN

@stormi said in Updates announcements and testing:

There are at least two blocking issues with this update candidate, so we'll retain it until they are fixed:

HTTP 403 errors on port 443. Easily reproduced: just load XCP-ng's web page over HTTPS, most images and scripts don't load. We debugged it and reported it to the XAPI project: https://github.com/xapi-project/xen-api/issues/4517

I am using my own self signed certificate on my servers and did not notice the page looking any different, all pictures and text are there.
I do notice the "deploy xoa" script is not working. The buttons seems to be non-functional and do nothing when clicked.
All other buttons and links are functional.

On a larger screen the alignment of the page content is different (topics and pictures side by side in the old page, but in a single colomn in the new page, just like it is with the old page on smaller windows).

Another thing I think is cosmetical but annoying:
when not typing https explicitly in the browser bar (so using http) I get an "403 forbidden" message instead of being forwarded to https

Edit: browser is firefox version 91.0.2 64 bits on windows 10