Hi, I'm working with a University in Montreal and we are looking at working together to improve the deployment planner. Mainly for post VM.CREATE tasks. Because what we observed with cloudstack, in our case with XenServer, overtime, a cluster will become unbalanced in therm of workload, vm HA will move VMs all over the the cluster which cause hotspot inside a cluster. Also, when performing maintenance xenmotion of VM spread them in the cluster but does not consider host usage and at the end of a maintenance it require manual operation to repopulate VMs on the last host updated. OS preference not taken into account except for VM.CREATE.
So, I'd like to work on improving VMs dispersion during and post outage and maintenances. when a cluster resources are added or removed. Would you have any more requirement, we will document a feature spec in the wiki which I believe it's still a requirement ? Does using KVM have similar issues over time? I don't think it would make sense to cloudstack to automatically take decision on moving VMs but for now create report of recommended action to do and provide steps to do them. tbd. Cheers, PL
