[GitHub] [cloudstack] weizhouapache commented on pull request #6002: server: fix host anti-affinity when start batch vms

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weizhouapache commented on pull request #6002:
URL: https://github.com/apache/cloudstack/pull/6002#issuecomment-1044274034


   > Manually tested on KVM with 2 hosts:
   > 
   > Success cases:
   > 
   > * Create anti-affinity group
   > * Attempt deploying 3 VMs assigning them to anti-affinity group -> RESULT: 
first 2 VMs running one on each host, 3rd deployment fails
   > * Stop the 2 running VMs
   > * Deploy VM without start, assigning it to the anti-affinity group
   > * Start 3 VMs in batch -> RESULT: 2 VMs running on different hosts 
(screenshot)
   > 
   > <img alt="Screen Shot 2022-02-17 at 22 06 56" width="867" 
src="https://user-images.githubusercontent.com/5295080/154598302-d09b630f-e866-4103-bf54-c7510af40c39.png";>
   > 
   > Failing case:
   > 
   > * 2 VMs running one on each host
   > * Attemp to start the third VM on a specific host (different form the 
last_host_id) -> RESULT 3 VMs running (screenshot)
   > 
   > <img alt="Screen Shot 2022-02-17 at 22 12 07" width="1059" 
src="https://user-images.githubusercontent.com/5295080/154598480-18ac1a3e-5630-430e-9afd-c644d0d102e3.png";>
   
   @nvazquez 
   thanks for testing.
   
   the case seems to be expected behaviour. see below
   
   
https://github.com/apache/cloudstack/blob/9eefc76fc5ef9abf3d74a5cc6c528ca404c707fd/server/src/main/java/com/cloud/deploy/DeploymentPlanningManagerImpl.java#L297-L301
   


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