On 08/14/2014 08:18 AM, Nigel Williams wrote:
Anyone know if this is safe in the short term? we're rebuilding our nova-compute nodes and can make sure the Dumpling versions are pinned as part of the process in the future.
The client should be fully backwards compatible. It figures out which features are supported by the cluster's version.
I recently worked with a cluster running on 0.67.9 with some 0.67.9 and 0.80.1 clients and that worked fine.
I also live migrated KVM VMs running on Qemu+0.67.9 to Qemu+0.80.5 on a different host without any issues. I migrated between both versions a couple of times and the VMs kept running just fine.
It was CloudStack in this case, but that doesn't matter since it's both Qemu+librbd
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