[GitHub] [cloudstack] shwstppr commented on issue #4237: Test scale_vm_vm needs fixing for XenServer/XCP-ng

[GitBox <gi...@apache.org>]

shwstppr commented on issue #4237:
URL: https://github.com/apache/cloudstack/issues/4237#issuecomment-673934722


   @rhtyd @DaanHoogland @Spaceman1984 
   Dynamic scaling for running VM is failing here,
   https://github.com/apache/cloudstack/blob/master/plugins/hypervisors/xenserver/src/main/java/com/cloud/hypervisor/xenserver/resource/CitrixResourceBase.java#L4606
   
   I checked with xcp-ng and tried to change compute offering for a Macchinina VM (memory 512mb to 768mb).
   `memory-static-min` and  `memory-static-max` for VM remains the same as initial offering value (512mb in my case) and hence the check fails. I checked with hypervisor itself.
   ```
   [12:50 xcp-ng-monkeybox ~]# xe vm-param-get param-name=memory-static-min uuid=4af04114-a83b-c8ba-1002-005bb11c4b35
   536870912
   [12:51 xcp-ng-monkeybox ~]# xe vm-param-get param-name=memory-static-max uuid=4af04114-a83b-c8ba-1002-005bb11c4b35
   536870912
   ```
   When I update these values to some appropriate range (512-1024 as I wanted to scale my VM's memory from 512 to 768mb) dynamic scaling works fine.
   ```
   [12:51 xcp-ng-monkeybox ~]# xe vm-shutdown uuid=4af04114-a83b-c8ba-1002-005bb11c4b35
   [12:51 xcp-ng-monkeybox ~]# xe vm-memory-static-range-set uuid=4af04114-a83b-c8ba-1002-005bb11c4b35 min=536870912 max=1073741824
   [12:51 xcp-ng-monkeybox ~]# xe vm-start uuid=4af04114-a83b-c8ba-1002-005bb11c4b35
   [12:51 xcp-ng-monkeybox ~]# xe vm-param-get param-name=memory-static-min uuid=4af04114-a83b-c8ba-1002-005bb11c4b35
   536870912
   [12:51 xcp-ng-monkeybox ~]# xe vm-param-get param-name=memory-static-max uuid=4af04114-a83b-c8ba-1002-005bb11c4b35
   1073741824
   ```
   So, should we be setting this memory-static range for the VM during deployment? I also checked with a CentOS7  VM so this doesn't seem to a problem with guest OS.


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