Nux created CLOUDSTACK-5945:
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Summary: Expand Upscaling feature to KVM
Key: CLOUDSTACK-5945
URL: https://issues.apache.org/jira/browse/CLOUDSTACK-5945
Project: CloudStack
Issue Type: Improvement
Security Level: Public (Anyone can view this level - this is the default.)
Components: Hypervisor Controller, KVM
Affects Versions: 4.3.0
Environment: CentOS 6.5 KVM
Reporter: Nux
Hello,
Scaling up memory and cpu works well on KVM/libvirt, too. Here's what needs to
happen to make it so:
- the domain's libvirt xml file needs to contain the maximum number of CPUs -
aka the number of cpu from the template with most CPUs:
<vcpu placement='static' current='3'>6</vcpu>
that means currently the VM uses 3 CPUs, but it can scale up to 6.
To scale it up live to 6 you'd just do:
virsh setvcpus 1-2-3-VM --live --count 6
- the domain's libvirt xml file needs to contain the following about memory:
<memory unit='KiB'>3072000</memory>
<currentMemory unit='KiB'>1048576</currentMemory>
that means the VM can scale up to 3000 MB, but currently only uses 1024 MB.
To scale it up live to 3000MB you'd have to do:
virsh setmem 1-2-3-VM --size 3072000
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