I am unable to assign a different amount of memory to my virtual machines from virt-manager. How may I get this done?

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 5
  • KVM

Issue

  • I am unable to assign a different amount of memory to my virtual machines from virt-manager. How may I get this done?

  • I get the following traceback call when trying to increase the amount of memory of my guest:

    Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/details.py", line 1466, in config_memory_apply
    self.vm.set_max_memory(maxmem.value * 1024)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1280, in set_max_memory
    self.vm.setMaxMemory(memory)
  File "/usr/lib64/python2.4/site-packages/libvirt.py", line 627, in setMaxMemory
    if ret == -1: raise libvirtError ('virDomainSetMaxMemory() failed', dom=self)
libvirtError: this function is not supported by the connection driver: virDomainSetMaxMemory

From virsh console:

virsh # setmaxmem rhel-5 2048000
error: Unable to change MaxMemorySize
error: this function is not supported by the connection driver: virDomainSetMaxMemory

Resolution

Update to virt-manager-0.6.1-14.el5.

Alternatively, you may assign a different amount of memory to virtual machines with the virsh edit command.

# virsh edit <name-of-the-guest>

You should edit the <memory> line:

<domain type='kvm' id='3'>
  <name>rhel6</name>
  <uuid>17c5692f-3feb-ea92-44b4-32108764bbcd</uuid>
  <memory>500000</memory>
  <currentMemory>367616</currentMemory>
  <vcpu>1</vcpu>
...

Root Cause

A bug in the virt-manager component is causing this error.

  • Component
  • kvm

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