Systems and methods for preventing split-brain scenarios in high-availability clusters

A system comprising:

• a detecting module that detects, at an active node of a high-availability cluster, a partitioning event that isolates the active node from a standby node of the high-availability cluster;
• a broadcasting module that broadcasts, from a health-status server and after the partitioning event has occurred, a cluster-health message to at least the active node, wherein:
• the health-status server is separate and distinct from the active node and the standby node;
• the cluster-health message comprises at least a health status of the standby node;
• the health status of the standby node is based at least in part on whether the health-status server received a node-health message from the standby node after the partitioning event occurred;
• a reacting module that reacts, at the active node and after the partitioning event has occurred, to the partitioning event such that the partitioning event does not result in a split-brain scenario within the high-availability cluster by performing, based at least in part on whether the active node received the cluster-health message from the health-status server, at least one of:
• causing, in response to not receiving the cluster-health message from the health-status server, the active node to yield at least one computing task assigned to the active node to the standby node;
• causing, in response to receiving the cluster-health message from the health-status server, the active node to continue to perform the at least one computing task assigned to the active node;
• at least one physical processor that executes the detecting module, the broadcasting module, and the reacting module.

A non-transitory computer-readable-storage medium comprising one or more computer-readable instructions that, when executed by at least one processor of at least one computing device, cause the computing device to:

• detect, at an active node of a high-availability cluster, a partitioning event that isolates the active node from a standby node of the high-availability cluster;
• after the partitioning event has occurred:
• broadcast, from a health-status server, a cluster-health message to at least the active node, wherein:
• the health-status server is separate and distinct from the active node and the standby node;
• the cluster-health message comprises at least a health status of the standby node;
• the health status of the standby node is based at least in part on whether the health-status server received a node-health message from the standby node after the partitioning event occurred;
• react, at the active node, to the partitioning event such that the partitioning event does not result in a split-brain scenario within the high-availability cluster by performing, based at least in part on whether the active node received the cluster-health message from the health-status server, at least one of:
• yielding, at the active node and in response to not receiving the cluster-health message from the health-status server, at least one computing task assigned to the active node to the standby node;
• continuing to perform, at the active node and in response to receiving the cluster-health message from the health-status server, the at least one computing task assigned to the active node.