Python Example of Configuring the CPU and Memory of a Virtual Machine

These examples are based on the code in the cpu.py and memory.py sample files.

Note: For a complete and up-to-date version of the sample code, see the vsphere-automation-sdk-python VMware repository at GitHub.

The following example shows how you can update the CPU configuration of a virtual machine.

...

vm = None
vm_name = None
stub_config = None
cpu_svc = None
cleardata = False
orig_cpu_info = None

...
        server, username, password, cleardata, skip_verification, vm_name = \
            parse_cli_args_vm(testbed.config['VM_NAME_DEFAULT'])
        stub_config = vapiconnect.connect(server,
                                          username,
                                          password,
                                          skip_verification)
...
def run():
    global vm
    vm = get_vm(stub_config, vm_name)
    if not vm:
        exit('Sample requires an existing vm with name ({}). '
             'Please create the vm first.'.format(vm_name))
    print("Using VM '{}' ({}) for Cpu Sample".format(vm_name, vm))

    # Create CPU stub used for making requests
    global cpu_svc
    cpu_svc = Cpu(stub_config)

    # Get the current CPU configuration
    cpu_info = cpu_svc.get(vm)
    print('vm.hardware.Cpu.get({}) -> {}'.format(vm, pp(cpu_info)))

    # Save current CPU info to verify that we have cleaned up properly
    global orig_cpu_info
    orig_cpu_info = cpu_info

    # Update the number of CPU cores of the virtual machine
    update_spec = Cpu.UpdateSpec(count=2)
    print('vm.hardware.Cpu.update({}, {})'.format(vm, update_spec))
    cpu_svc.update(vm, update_spec)

    # Get the new CPU configuration
    cpu_info = cpu_svc.get(vm)
    print('vm.hardware.Cpu.get({}) -> {}'.format(vm, pp(cpu_info)))

    # Update the number of cores per socket and 
    # enable adding CPUs while the virtual machine is running 
    update_spec = Cpu.UpdateSpec(cores_per_socket=2, hot_add_enabled=True)
    print('vm.hardware.Cpu.update({}, {})'.format(vm, update_spec))
    cpu_svc.update(vm, update_spec)
...

The following example demonstrates how you can add memory to a running virtual machine.

...

vm = None
vm_name = None
stub_config = None
memory_svc = None
cleardata = False
orig_memory_info = None

...
    server, username, password, cleardata, skip_verification, vm_name = \
            parse_cli_args_vm(testbed.config['VM_NAME_DEFAULT'])
    stub_config = vapiconnect.connect(server,
                                          username,
                                          password,
                                          skip_verification)

...

    global vm
    vm = get_vm(stub_config, vm_name)
    if not vm:
        exit('Sample requires an existing vm with name ({}). '
             'Please create the vm first.'.format(vm_name))
    print("Using VM '{}' ({}) for Memory Sample".format(vm_name, vm))

    # Create Memory stub used for making requests
    global memory_svc
    memory_svc = Memory(stub_config)

    # Get the current Memory configuration
    memory_info = memory_svc.get(vm)
    print('vm.hardware.Memory.get({}) -> {}'.format(vm, pp(memory_info)))

    # Update the memory size of the virtual machine
    update_spec = Memory.UpdateSpec(size_mib=8 * 1024)
    print('vm.hardware.Memory.update({}, {})'.format(vm, update_spec))
    memory_svc.update(vm, update_spec)

    # Get the new Memory configuration
    memory_info = memory_svc.get(vm)
    print('vm.hardware.Memory.get({}) -> {}'.format(vm, pp(memory_info)))

    # Enable adding memory while the virtual machine is running
    update_spec = Memory.UpdateSpec(hot_add_enabled=True)
    print('vm.hardware.Memory.update({}, {})'.format(vm, update_spec))
    memory_svc.update(vm, update_spec)

...