def delete_vm(vm: data.VM) -> None:
"""
Delete the specific VM.
:param vm: A VM instance.
:return: None.
"""
server = vm.server
if vm.config.is_double:
server.A_cpu_rest += vm.config.cpu // 2
server.B_cpu_rest += vm.config.cpu // 2
server.A_memory_rest += vm.config.memory // 2
server.B_memory_rest += vm.config.memory // 2
server.AB_vm.remove(vm)
elif vm.node == 'A':
server.A_cpu_rest += vm.config.cpu
server.A_memory_rest += vm.config.memory
server.A_vm.remove(vm)
else:
server.B_cpu_rest += vm.config.cpu
server.B_memory_rest += vm.config.memory
server.B_vm.remove(vm)
vm.server = None
vm.node = None
def deploy_vm(vm: data.VM,
server: data.Server,
server_node: str = None) -> None:
"""
Deploy the specific VM on the specific Server.
:param vm: A VM instance.
:param server: A Server instance.
:param server_node: The value must be 'A' or 'B'. If the VM is deployed on both nodes 'AB', the value will be ignored.
:return: None.
"""
if not vm.config.is_double and server_node not in ['A', 'B']:
raise ValueError('You must specify the server node.')
if not has_capacity(server=server, server_node=server_node, vm=vm):
raise ValueError('The Server has no capacity for the VM.')
if vm.config.is_double:
server.A_cpu_rest -= vm.config.cpu // 2
server.B_cpu_rest -= vm.config.cpu // 2
server.A_memory_rest -= vm.config.memory // 2
server.B_memory_rest -= vm.config.memory // 2
server.AB_vm.append(vm)
vm.server = server
deploy = data.Deploy(vm=vm, to_server=server)
data.Operation_List[-1].deploy.append(deploy)
elif server_node == 'A':
server.A_cpu_rest -= vm.config.cpu
server.A_memory_rest -= vm.config.memory
server.A_vm.append(vm)
vm.server = server
vm.node = 'A'
deploy = data.Deploy(vm=vm, to_server=server, to_node='A')
data.Operation_List[-1].deploy.append(deploy)
else:
server.B_cpu_rest -= vm.config.cpu
server.B_memory_rest -= vm.config.memory
server.B_vm.append(vm)
vm.server = server
vm.node = 'B'
deploy = data.Deploy(vm=vm, to_server=server, to_node='B')
data.Operation_List[-1].deploy.append(deploy)
