Method to discover multiple paths to disk devices cluster wide

A computer program product comprising:

• a plurality of instructions configured to implement a multi-pathing module, comprising
• a first set of instructions, executable on a first computer system, configured to
• receive a control message at a first node, wherein
• the first node comprises the first computer system,
• the first node is one of a plurality of nodes,
• the first node is configured to communicate with one or more other nodes of the plurality of nodes via a network, and
• the plurality of nodes form a cluster by virtue of, at least in part, being configured to communicate with one another via the network,
• a second set of instructions, executable on the first computer system, configured to identify a second node of the plurality of nodes as a node from which the control message was received, wherein
• the second node comprises a second computer system, and
• the plurality of nodes comprises the second node,
• a third set of instructions, executable on the first computer system, configured to identify a storage device to which the second node is coupled, wherein
• the second node and the storage device are configured to communicate with one another by a storage area network, and
• a fourth set of instructions, executable on the first computer system, configured to determine a status of a connection path, wherein
• the connection path is between the first node and the second node via the network, and the second node and the storage device via the storage area network;
• and
• a non-transitory computer-readable storage medium, wherein the instructions are encoded in the non-transitory computer-readable storage medium.

A computer system comprising:

• one or more processors;
• a network interface, coupled to the one or more processors, wherein
• the computer system is configured to be one of a plurality of computer systems forming a cluster by virtue of being configured to communicate with one another via a network, and
• the computer system is configured to communicate with one or more other computer systems of the plurality of computer systems via the network, using the network interface;
• a non-transitory computer-readable storage medium, coupled to the one or more processors;
• and
• a multi-pathing module, encoded in the non-transitory computer-readable storage medium, wherein
• the multi-pathing module comprises
• a disk connectivity module,
• a meta-node, and
• a plurality of instructions configured to cause the one or more processors to
• receive a control message from another computer system of the plurality of computer systems via the network,
• identify a storage device to which the another computer system is coupled, wherein
• the another computer system and the storage device are configured to communicate with one another via a storage area network, and
• determine connectivity information for a connection path between the computer system and the another computer system via the network, and the another computer system and the storage device via the storage area network.