A cross-node virtual machine cluster high availability implementation method and device

Abstract

The present application discloses a cross-node virtual machine cluster high-availability method and device, the method includes establishing a cluster through the pacemaker resource management tool; obtaining the network connection mode and virtual address of the virtual machine; obtaining the Information about the physical network card that provides the heartbeat link for the virtual machine; obtain the status of the cluster; query whether the virtual machine on the peer host has been fenced by calling the fence script on the peer node, if If the number of fence operation failures exceeds a preset threshold, the physical network card of the host machine causing the split brain is determined, and the virtual machine on the host machine causing the split brain is removed from the cluster. The above cross-node virtual machine cluster high-availability implementation method and device can solve the cluster split-brain problem caused by the failure of the physical network card of the host machine or the failure of the external switch, avoid abnormal cluster status caused by external factors, and ensure effective external service provision.

Description

technical field [0001] The invention belongs to the technical field of cluster communication, and in particular relates to a cross-node virtual machine cluster high-availability realization method and device. Background technique [0002] In the prior art, the cluster solution is based on the high-availability characteristics of virtual machine clusters realized by pacemaker resource manager and its components corosync (providing heartbeat support), fence_virsh (providing fault recovery), etc., through pacemaker, each node broadcasts to all other The node sends a heartbeat signal. When the heartbeat of a node is lost, other nodes perform fence operations on the node by starting the fence script resource, including restarting and shutting down the node. [0003] Two or more nodes communicating with each other in the cluster usually send a heartbeat signal to ensure that the nodes are running normally. Usually, when a node fails (downtime, crashes), it will stop communicating...

AI Technical Summary

Problems solved by technology

When the network cable of the host physical network card is pulled out due to human factors or other factors, the heartbeat of the nodes in the cluster is lost. In this case, when the heartbeat is lost, the nodes at both ends of the link cannot detect the heartbeat signal of the peer node. , the fence operation will continue to be performed on the peer node, but because the physical network cable of the node is pulled out or damaged, the fence operation on the nodes at both ends of the link will not succeed, resulting in a split-brain state of the cluster

When the cluster is in the split-brain state, the node in the state of losing heartbeat will continue to send fence operations to allow the peer node to perform fence operations, but the fence operations will not be executed successfully, and the result is that the state of the entire cluster is abnormal , unable to continue to provide services outside the cluster normally

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