CLUSTER CONTROLLER SELECTION FOR SHARED STORAGE CLUSTERS

Described herein is a system that performs cluster controller selection in a shared storage cluster. A shared storage cluster can include multiple data node devices equipped to access to a shared storage location. The data node devices can be managed by a cluster controller. Furthermore, multiple of the data node devices can be equipped to serve as the cluster controller if necessary. To ensure ongoing operation of a cluster controller, each data node device, including the current cluster controller, can periodically update the shared storage location to indicate the data node device is operational. Each data node device can furthermore perform a cluster controller selection process, and can record its cluster controller selection in the shared storage location. If the current cluster controller fails to periodically update the shared storage location, the cluster controller selection processes at the other data node devices can select a new cluster controller.