SystemVMs running in Xen HVM mode are not configured

[dpassante]

ISSUE TYPE

• Bug Report

COMPONENT NAME

systemVM image 4.11 for XenServer

CLOUDSTACK VERSION

4.11.1

CONFIGURATION

• Cloudstack 4.11.1
• XenServer 7.1.1
• SystemVM 4.11.1 Fri Jun 22 07:52:17 UTC 2018 running in HVM mode

OS / ENVIRONMENT

N/A

SUMMARY

Newly created system VMs are not configured.

Related to #2561

virt-what cpuid helper detects Xen HVM guests with viridian extension enabled as hyperV guests.

root@v-2158-VM:~# /usr/lib/x86_64-linux-gnu/virt-what-cpuid-helper
Microsoft Hv

So, virt-what returns the following on Xen HVM SystemVMs:

root@v-2158-VM:~# virt-what
hyperv
xen
xen-domU

In this case, the /opt/cloud/bin/setup/cloud-early-config script assumes that we're running on a paravirtualized guest and fails to get boot args.

EXPECTED RESULTS

hypervisor: xen-hvm
systemvm type: should be detected.

Sun Jul 22 03:18:28 UTC 2018 Executing cloud-early-config
Sun Jul 22 03:18:28 UTC 2018 Detected that we are running inside xen-hvm
Sun Jul 22 03:18:28 UTC 2018 Scripts checksum detected: oldmd5=76c6bbddfc1d55d1b212ad8ca07190d4 newmd5=76c6bbddfc1d55d1b212ad8ca07190d4
Sun Jul 22 03:18:28 UTC 2018 Configuring systemvm type=consoleproxy
Sun Jul 22 03:18:29 UTC 2018 Setting up console proxy system vm
...

ACTUAL RESULTS

hypervisor: xen-domU
systemvm type : empty

root@systemvm:~# cat /var/log/cloud.log
Fri Jul 20 12:55:19 UTC 2018 Executing cloud-early-config
Fri Jul 20 12:55:19 UTC 2018 Detected that we are running inside xen-domU
Fri Jul 20 12:55:19 UTC 2018 Scripts checksum detected: oldmd5=76c6bbddfc1d55d1b212ad8ca07190d4 newmd5=76c6bbddfc1d55d1b212ad8ca07190d4
Fri Jul 20 12:55:19 UTC 2018 Configuring systemvm type=
Fri Jul 20 12:55:19 UTC 2018 Finished setting up systemvm

[yadvr]

@dpassante the only difference between how xen-domU and xen are used by the systemvm is wrt the way of getting an initial cmdline. Otherwise, there is no difference. Are you able to see systemvms come up or are they failing?

[yadvr]

ping @dpassante based on the comment above I'll remove this from 4.11.2.0 milestone, if you can reply and share any suggestive fix we can help with reviewing and testing of a fix.

[dpassante]

@rhtyd the systemvms are booting but not configured as the PV-ARGs are not present in /proc/cmdline.

The easy way to fix is to do not rely on virt-what for Xen guests and move lines 44-52 to the beginning of the hypervisior() function.

I'll also share the fix that is currently running on my environments.