Resize memory, cpu on the fly

Please, describe the problem here and provide additional information below (if applicable) …

— How can we modify cpu, memory size on the fly and automate it, in case of any threshhold breach.

Versions of the related components and OS (frontend, hypervisors, VMs): OpenNebula 5.4, KVM

Steps to reproduce:

Current results:

In current version 5.4, It seems not possible, while VM is running. while KVM native and VMware support this feature

Expected results:

memory, cpu and disck resize can be done on fly

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