Managing virtual overlay infrastructures

A non-transitory computer readable medium storing machine readable instructions, which when executed by a processor perform a method of managing a virtual overlay infrastructure, wherein the virtual overlay infrastructure comprises virtual machines mapped onto a plurality of physical resources, the machine readable instructions comprising code to:

• passivate the virtual overlay infrastructure by suspending operations of all of the virtual machines of the virtual overlay infrastructure;
• during the passivation of the virtual overlay infrastructure, determine whether physical resource reservations for the virtual machines are to be changed;
• and
• reactivate the operations of all of the virtual machines subsequent to the passivation of the virtual overlay infrastructure.

A method of managing a virtual overlay infrastructure, wherein the virtual overlay infrastructure comprises virtual machines mapped onto a plurality of physical resources, the method comprising:

• passivating, by one or more processors, the virtual overlay infrastructure by suspending operations of all of the virtual machines of the virtual overlay infrastructure;
• during the passivation of the virtual overlay infrastructure, determining whether to maintain the physical resources reserved for the virtual overlay infrastructure;
• and
• reactivating the operations of all of the virtual machines of the virtual overlay infrastructure subsequent to the passivation of the virtual overlay infrastructure.

A system comprising:

• a plurality of physical resources;
• a virtual overlay infrastructure comprising virtual machines mapped onto the plurality of physical resources;
• and
• at least one anomaly detector, wherein the at least one anomaly detector is to use a clone of at least part of the virtual overlay infrastructure to create a signature of a typical behavior of the virtual overlay infrastructure, and to compare an operation of the virtual overlay infrastructure to the created signature to detect anomalous operation.

A system comprising:

• a plurality of physical resources;
• a virtual overlay infrastructure comprising virtual machines mapped onto the plurality of physical resources;
• and
• a controller to
• passivate the virtual overlay infrastructure by suspending operations of the virtual machines in the virtual overlay infrastructure,
• during the passivation of the virtual overlay infrastructure, determine whether physical resource reservations for the virtual machines are to be changed, and
• reactivate the operations of all of the virtual machines in the virtual overlay infrastructure subsequent to the passivation of the virtual overlay infrastructure.