Corosync+pacemaker+drbd+mysql implementing MySQL's Highly available cluster

I. Overview of Corosync

1, what is AIS and Openais?

AIS is an application interface specification, a collection of open specifications for defining application interfaces (APIs) that serve as middleware to provide an open, highly portable program interface for application services. is needed in the implementation of highly available applications. The Service Availability Forum (SA forum) is an open forum that develops and publishes these free specifications. Application interfaces (APIs) that use the AIS specification can reduce application complexity and shorten application development time, the main purpose of which is to improve intermediate component portability and high availability of applications.

Openais is an application interface specification for the SA Forum-based cluster framework. Openais provides a cluster mode, which includes cluster framework, cluster member management, communication mode, cluster monitoring and so on, can provide cluster interface for cluster Software or tool to meet AIS standard, but it does not have cluster resource management function and cannot form a cluster independently.

2, Corosync Introduction

Corosync was originally used only to demonstrate an application of the Openais Cluster Framework interface specification, which can be said to be part of the Openais, but the latter is clearly beyond the official original idea, and more and more vendors are trying to use Corosync as a cluster solution. The RHCs cluster suite, such as Redhat, is based on the Corosync implementation.

Corosync only provides a message layer, and does not provide CRM directly, generally using pacemaker for resource management.

This article is from the "Little Water Drop" blog, please make sure to keep this source http://wangzan18.blog.51cto.com/8021085/1721564

Corosync+pacemaker+drbd+mysql implementing MySQL's Highly available cluster