Information processing system and control method for information processing system

A control method for an information processing system that includes a first information processing apparatus that executes a first virtual machine belonging to a first tenant and that executes a second virtual machine belonging to a second tenant, a second information processing apparatus that executes a third virtual machine belonging to the first tenant and that executes a fourth virtual machine belonging to the second tenant, a first switch device that is connected to the first information processing apparatus, a second switch device that is connected to the second information processing apparatus, a third switch device that is connected to the first switch device and the second switch device, a fourth switch device that is connected to the first switch device and the second switch device, and a management device that manages the first and the second information processing apparatuses and the first to the fourth switch devices, the control method for the information processing system comprising:

• referring to, performed by the management device, elapsed time information related to each sending source address that is held by one of the first to the fourth switch devices;
• referring to, performed by the management device, transmission time information related to each sending source address that is held by a virtual switch that is executed by one of the first and the second information processing apparatuses;
• and
• identifying, performed by the management device, a failure path by identifying a virtual machine communicating with another virtual machine based on the elapsed time information and the transmission time information.

A non-transitory computer-readable storing medium having stored therein a control program for a management device that manages an information processing system that includes a first information processing apparatus that executes a first virtual machine belonging to a first tenant and that executes a second virtual machine belonging to a second tenant, a second information processing apparatus that executes a third virtual machine belonging to the first tenant and that executes a fourth virtual machine belonging to the second tenant, a first switch device that is connected to the first information processing apparatus, a second switch device that is connected to the second information processing apparatus, a third switch device that is connected to the first switch device and the second switch device, a fourth switch device that is connected to the first switch device and the second switch device and the management device, the control program causing the management device to execute a process comprising:

• referring to elapsed time information related to each sending source address that is held by one of the first to the fourth switch devices;
• referring to transmission time information related to each sending source address that is held by a virtual switch that is executed by one of the first and the second information processing apparatuses;
• and
• identifying a failure path by identifying a virtual machine communicating with another virtual machine based on the elapsed time information and the transmission time information.