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

摘要

A computer-implemented method for preventing split-brain scenarios in high-availability clusters may include (1) detecting, at a first node of a high-availability cluster, a partitioning event that isolates the first node from a second node of the high-availability cluster, (2) broadcasting, from a health-status server and after the partitioning event has occurred, a cluster-health message to the first node that includes at least a health status of the second node that is based on whether the health-status server received a node-health message from the second node, and (3) reacting, at the first node and based at least in part on whether the first node received the cluster-health message, to the partitioning event such that the partitioning event does not result in a split-brain scenario within the high-availability cluster. Various other methods, systems, and computer-readable media are also disclosed.

主权项

1. A computer-implemented method comprising:
detecting, 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:
broadcasting, 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;reacting, 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.