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Subject [GitHub] rhtyd commented on issue #2983: KVM live storage migration intra cluster from NFS source and destination
Date Thu, 31 Jan 2019 06:34:06 GMT
rhtyd commented on issue #2983: KVM live storage migration intra cluster from NFS source and
destination
URL: https://github.com/apache/cloudstack/pull/2983#issuecomment-459232722
 
 
   @GabrielBrascher I'm not sure what/how you tested it. Did you test using my additional
notes: (in a comment shared earlier, now I've added that to the description):
   
   1. To use this feature set the `storage_motion_supported=1` in the hypervisor_capability
table for KVM. This is done by default as the feature may not work in some environments, read
below.
   2. This feature of online storage+VM migration for KVM will only work with CentOS6 and
possible Ubuntu as KVM hosts but not with CentOS7 due to:
   - https://bugs.centos.org/view.php?id=14026
   - https://bugzilla.redhat.com/show_bug.cgi?id=1219541
   On CentOS7 the error we see is: `" error: unable to execute QEMU command 'migrate': this
feature or command is not currently supported"` (reference https://ask.openstack.org/en/question/94186/live-migration-unable-to-execute-qemu-command-migrate/).
Reading through various lists looks like the migrate feature with qemu may be available with
paid versions of RHEL-EV but not centos7 however this works with CentOS6.
   
   To test, after enabling storage motion for KVM, you can try to perform online migration
of VM with volumes using the `migrateVirtualMachineWithVolume` API.

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