High availability method of two-node Ceph cluster

Abstract

The invention relates to a high availability method of a two-node Ceph cluster, which comprises the following steps: a timing monitoring step: when two nodes work normally, monitoring whether an opposite-end node crashes or not; if yes, executing a degradation step by the node; after the opposite-end node fails, monitoring whether reconstruction of the opposite-end node is completed or not; if yes, updating the local configuration file; a pre-judgment step: after the fault node is online again, checking whether the local monitor needs to be reconstructed or not; if yes, executing a reconstruction step; a degradation step: deleting an opposite-end monitor in a local directory, marking an rm _ remote label, starting a daemon process of the monitor, limiting the permission of writing, degrading to a read-only state, and deleting the rm _ remote label; a reconstruction step: deleting local monitor data in a local directory, initializing a local monitor, marking a local _ real label, starting a daemon process of the monitor, cancelling the authority of limiting writing, and deleting the local _ real label. Compared with technologies of the prior art, the method has the advantages of reduced hardware and operation and maintenance cost and the like.

Description

technical field [0001] The invention relates to the field of high availability of computer storage services, in particular to a high availability method of a two-node Ceph cluster. Background technique [0002] With the continuous advancement of information technology, the unstructured data of enterprises has grown exponentially, and more and more enterprises have begun to deploy distributed systems to store ever-growing massive data. Generally speaking, enterprise storage systems are used for business systems, so high availability of storage systems is crucial. In order to meet the high-availability requirements of a distributed storage system, it generally requires at least 3 nodes for deployment. When one node is down or unreachable, the remaining two nodes can also provide storage services. If there are two nodes, in order to prevent split-brain, an arbitration node needs to be introduced to ensure data consistency. [0003] Ceph is widely used as an open source distr...

AI Technical Summary

Problems solved by technology

[0005] (1) Deploy Monitor on only one node. At this time, if the node where Monitor is located fails, the service will be unavailable, and there will be a single point of failure problem.

[0006] (2) A Monitor is deployed on each of the two nodes. At this time, when one of the nodes goes down, the service will be unavailable

Therefore, in order to meet the high availability requirements, it is necessary to deploy 3 nodes or use the mode of arbitration nodes to deploy the distributed storage system, which increases additional hardware and operation and maintenance costs.

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