Storage system and control method

1. A storage system for managing a cluster configured by including compute nodes that are nodes which are provided respectively at a plurality of sites and are capable of operating a container, wherein storage devices providing volumes which can be used by the container are provided at each of the plurality of sites,

the storage system comprising:

at least one processor configured to:

generate, for a set of the volumes that are created and synchronized with each other at a plurality of storage devices designated from two or more sites, an association volume which is virtually associated with each of the volumes of the set of the volumes, wherein the set of the volumes is recognized by the container based on the association volume; and

issue an instruction to each storage device, at which each of the set of volumes is created, to connect each volume associated with the association volume and a compute node which operates the container, based on a request for activation of the container for which the generated association volume is designated.

2. The storage system according to claim 1 , wherein the at least one processor is further configured to:

judge, regarding each volume associated with the association volume, whether or not the storage device, at which the volume is created, and the compute node which operates the container are provided at a same site, based on the request for activation of the container for which the generated association volume is designated; and

set a setting to cause the volume created at the storage device,

when it is judged that the storage device and the compute node are provided at the same site, to be used preferentially.

3. The storage system according to claim 2 , wherein the at least one processor is further configured to:

detect a failure of the compute node,

wherein if the failure is detected at the compute node, judge, regarding each volume associated with the association volume designated at a container to be relocated from the compute node to another compute node, whether or not the storage device, at which the volume is created, and the other compute node are provided at a same site and set a setting to cause the volume created at the storage device, when it is judged that the storage device and the other compute node are provided at the same site, to be used preferentially.

4. The storage system according to claim 2 ,

wherein the at least one processor is further configured to:

manage information;

detect a failure of a storage device connected to the compute node; and

control to output information based on the managed information and a detection result,

wherein if the at least one processor sets the setting to cause the volume created at the storage device, when it is judged that the storage device and the compute node are provided at the same site, to be used preferentially, the at least one processor is further configured to perform control to report management information, which is associated with information of the volume, information of the storage device, and information indicating that the setting is set to cause the volume to be used preferentially, to the compute node at the site,

wherein the at least one processor is further configured to manage the reported management information, and

wherein if a failure of the storage device is detected, the at least one processor is further configured to perform control to judge, based on the managed information, whether or not there is any volume to which the setting to cause the volume to be used preferentially at the compute node is set; and if it is judged that there is the volume to which the setting to cause the volume to be used preferentially is set, the at least one processor is further configured to perform control to output information for urging relocation of a container which uses the volume in operation at the compute node.

5. The storage system according to claim 1 , wherein the at least one processor is further configured to:

accept input of information of the plurality of storage devices designated from the two or more sites and a request to create a volume for which the plurality of storage devices are designated,

wherein if the request to create a volume for which the plurality of storage devices are designated from the two or more sites is accepted, the at least one processor is further configured to issue an instruction to each of the plurality of storage devices to create a volume, control to receive information of the created volume from each of the plurality of storage devices, and issue an instruction to each of the plurality of storage devices to perform synchronization processing of the created volume.

6. A control method for a storage system for managing a cluster configured by including compute nodes that are nodes which are provided respectively at a plurality of sites and are capable of operating a container, wherein storage devices providing volumes which can be used by the container are provided at each of the plurality of sites,

the control method comprising:

generating, by at least one processor, for a set of the volumes that are created and synchronized with each other at a plurality of storage devices designated from two or more sites, an association volume which is virtually associated with each of the volumes of the set of the volumes, wherein the set of the volumes is recognized by the container based on the association volume; and

issuing an instruction, by the at least one processor, to each storage device, at which each of the set of volumes is created, to connect each volume associated with the association volume and a compute node which operates the container, based on a request for activation of the container for which the generated association volume is designated.