GutoVeronezi commented on pull request #5297:
URL: https://github.com/apache/cloudstack/pull/5297#issuecomment-993625709


   @DaanHoogland as I explained in 
https://github.com/apache/cloudstack/pull/5297#issuecomment-940007442, the 
errors are related to the CentOS's QEMU binary:   
   `Operation not supported: live disk snapshot not supported with this QEMU 
binary`
   
   RedHat removed/blocked a lot of features in CentOS, such as VM migrations, 
memory hotplug, and so on. Therefore, default CentOS's QEMU binary does not 
support them. The tests are not passing due to QEMU binary in CentOS 7 used by 
the CI.  
   
   If the QEMU binary in CentOS 7 used by the CI were upgraded to the 
alternative (`**qemu-kvm-ev**`, which supports more features than the default 
one) or if it used another distro, like Ubuntu, the tests would pass. 
Therefore, the problem is not directly linked with the patch itself.
   
   Besides that, in my point of view, such limitations in the default QEMU 
binary (in CentOS) make it unfeasible to build a cloud with CentOS and the 
default QEMU binary. Probably, most people using KVM with CentOS are using the 
`ev` binaries (I might be wrong though, however, ​that seems to be the case 
when looking at the users' list). Therefore, I do not see why we would impose 
such limitation in the ACS feature set, to support an O.S. that is in its final 
years, and we have a limited supported set of features with it. Also, we just 
need to guide users to upgrade to  **qemu-kvm-ev**, like we already did many 
other times in the mailing list (e.g. 
https://lists.apache.org/thread/vg9qz7w52yso5b5xcp4rhtmrodhvdmpf).


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