Control method for virtual machine and management computer

A management computer for managing a virtual computer system,

• the virtual computer system comprising:
• a plurality of physical computers each comprising a processor and a memory;
• a virtualization module implemented via at least one processor and at least one memory, for partitioning resources of the plurality of physical computers to provide a plurality of virtual computers;
• and
• a network switch for coupling the plurality of physical computers and coupling the management computer thereto,
• the management computer comprising:
• a virtual network table, a host-NIC table and LAN switch management information;
• a group management module implemented via at least one processor and at least one memory, for allocating the plurality of virtual computers to a plurality of groups;
• a monitoring module implemented via at least one processor and at least one memory, for obtaining a load value for each of the plurality of groups;
• a judgment module implemented via at least one processor and at least one memory, for comparing the load value, which is obtained for the each of the plurality of groups, against a preset threshold to identify a group whose load value exceeds the preset threshold as a first group;
• a configuration change module implemented via at least one processor and at least one memory, for selecting a second group out of the plurality of groups minus the first group, identifying as a migration target computer a given physical computer out of allocated physical computers of the plurality of physical computers, that run virtual computers allocated to the second group, and migrating the migration target computer from the second group to the first group;
• and
• a virtual computer management module implemented via at least one processor and at least one memory, for instructing the virtualization module of each of the plurality of physical computers to control the plurality of virtual computers,
• wherein the configuration change module is configured to:
• output, to the virtual computer management module, an instruction to migrate virtual computers that are provided by the migration target computer to other physical computers within the second group;
• remove the migration target computer from the second group;
• output an instruction to the virtual computer management module to change virtual network settings of the virtualization module of the migration target computer in a manner that suits the first group, where the change is performed with reference to information in the virtual network table, and is based on processing of creating a virtual network configuration plan to change the virtual network;
• change settings of the network switch in a manner that enables the migration target computer to operate in the first group, where the change setting is performed with reference to the virtual network table and the host-NIC table, and is based on processing of creating LAN switch configuration plan to change the LAN switch settings;
• add the migration target computer to the first group;
• and
• output to the virtual computer management module an instruction to run the virtual computers of the first group on the migration target computer.