Fence method in cluster system and apparatus thereof

Abstract

The invention provides a fence method in a cluster system and an apparatus thereof. The method comprises the following steps: receiving a fence operation command transmitted by a cluster main management node, wherein the fence operation command carries target physic host node information and target application program information; if the fence operation command received by the cluster main management node can be executed locally, determining fence equipment corresponding to the fence operation command, triggering the fence equipment through an interface corresponding to the fence equipment so as to execute the fence operation of the target application program on the target physic host node through the fence equipment. By using the method and the apparatus, security and consistency of shared data can be guaranteed.

Description

technical field [0001] The present invention relates to cluster technology, and in particular, to a fence method and device in a cluster system. Background technique [0002] High availability (High Availability) cluster is a group of computer systems that jointly provide network resources for clients, providing transparent redundant processing capabilities, so as to achieve the goal of uninterrupted applications. Each of the computers that provide services is called a physical host node (Node). When a physical host node is unavailable or cannot process a client's request, the request will be transferred to another available physical host node in time for processing, and these are transparent to the client, and the client does not need to care about the specific location of the resource to be used. The system will do it automatically. [0003] In a high-availability cluster environment (such as a cluster system based on Heartbeat or Corosync), it is necessary to protect th...

AI Technical Summary

Problems solved by technology

[0003] In a high-availability cluster environment (such as a cluster system based on Heartbeat or Corosync), it is necessary to protect the security and consistency of shared data, otherwise, it will cause serious problems and even cause system crashes

For example, if an application (such as a virtual machine) on a physical host node X in the cluster is abnormal and is in an unavailable state, the cluster management will detect the abnormality and start the application on another physical host node Y , if the application on the physical host node X is not isolated in time at this time, the two applications will access the same resource, such as a shared database or a shared disk, and if a write operation occurs, data inconsistency will result

Images