Hello, I have a cluster composed of 4 hosts, with 2 hosts in site A and 2 hosts in site B. Version of engine and hosts is latest 4.4.8-6. Site A is the primary site and its hosts have SPM priority high, while site B hosts have SPM priority low. For critical VMs I create a cluster affinity group so that they preferably run on hosts in site A. If I migrate a VM from one host in site A to one host in site B, the migration completes but suddenly, after a few seconds (ranging from 10 to 30) the VM comes back again (live migrates) to one host of the site A pool.
Two considerations: . when the VM comes back to site A and I'm connected to the web admin gui I see in bottom right the pop-up message regarding the balancing operation: https://drive.google.com/file/d/1lfm0AVwYKyyRL1qHh94AySpr3XAtV7lO/view?usp=sharing But then if I go in the VM, or cluster, or general events pane I don't see any direct feedback regarding this balancing that took place. I only see the VM migration events: Oct 1, 2021, 2:47:01 PM Migration completed (VM: impoldsrvdbpbi, Source: xxxx, Destination: yyyy, Duration: 15 seconds, Total: 27 seconds, Actual downtime: 67ms) Oct 1, 2021, 2:46:34 PM Migration initiated by system (VM: impoldsrvdbpbi, Source: xxxx, Destination: yyyy, Reason: Affinity rules enforcement). Oct 1, 2021, 2:45:45 PM Migration completed (VM: impoldsrvdbpbi, Source: yyyy, Destination: xxxx, Duration: 2 seconds, Total: 14 seconds, Actual downtime: (N/A)) Oct 1, 2021, 2:45:30 PM Migration started (VM: impoldsrvdbpbi, Source: yyyy, Destination: xxxx, User: gian@internal). That indeed contain some information (Reason: Affinity rules enforcement) but only in the VM migration line. Could it be useful to add an independent line regarding the balancing trigger that implies then a migration? . In this case could it be useful to give the user a warning that the VM will be suddenly migrated back so that he/she can think about it before having at the end two migrations with a final stage that is the starting point itself...? If I leave only one host in site A and put it into maintenance, the VMs are correctly migrated to hosts in site B and even when the host in site A comes back available, the coming back operation is not triggered. Is this something expected or should the live migrate to hosts in site A? Thanks, Gianluca
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