MySQL数据库集群实现负载均衡的安装配置详解

本文我们主要介绍了MySQL数据库集群实现负载均衡的安装配置工作，接下来我们就让我们一起来了解一下这部分内容。

MySQL数据库集群关系如下图：

ndbd：数据库节点，物理数据实际存放位置。

mysqld：MySQL服务器节点。

ndbd_mgmd：管理节点。管理／查看各库节点和服务器节点的状态。程序直接访问的是这台机器的IP。默认端口仍是3306。

1.在ndb_mgmd、mysqld、Node A、Node B上安装MySQL5.0

安装目录：/usr/local/mysql

2.配置 Node A、Node B、mysqld：

# cp /usr/local/mysql/support-files/my-medium.cnf /etc/my.cnf

# vi /etc/my.cnf 在文件尾加入 # my.cnf

# example additions to my.cnf for MySQL Cluster

# (valid in MySQL 5.0) # enable ndbcluster storage engine, and provide connectstring for

# management Server host (default port is 1186)

[mysqld]

ndbcluster

ndb-connectstring=192.168.56.30 # provide connectstring for management Server host (default port: 1186)

[ndbd]

connect-string=192.168.56.30 # provide connectstring for management Server host (default port: 1186)

[ndb_mgm]

connect-string=192.168.56.30 # provide location of cluster configuration file

[ndb_mgmd]

config-file=/var/lib/mysql-cluster

在Node A、Node B上创建日志文件夹

# mkdir /var/lib/mysql-cluster

3.配置ndb_mgmd：

# mkdir /var/lib/mysql-cluster

# cd /var/lib/mysql-cluster

# vi config.ini # file "config.ini" - 2 data nodes and 2 SQL nodes

# This file is placed in the startup directory of ndb_mgmd (the

# management server)

# The first MySQL Server can be started from any host. The second

# can be started only on the host mysqld_5.mysql.com [NDBD DEFAULT]

NoOfReplicas= 2

DataDir= /var/lib/mysql-cluster [NDB_MGMD]

Hostname= 192.168.56.30

DataDir= /var/lib/mysql-cluster [NDBD]

HostName= 192.168.56.11 [NDBD]

HostName= 192.168.56.12[MYSQLD]

[MYSQLD]

[MYSQLD]

4. 启动服务

ndb_mgmd /usr/local/mysql/bin/ndb_mgmd -f /var/lib/mysql-cluster/config.ini

Node A      /usr/local/mysql/bin/ndbd --initial #只在第一次启动ndbd时使用--initial参数

Node B      /usr/local/mysql/bin/ndbd --initial

mysqld      /usr/local/mysql/support-files/mysql.server start检查工作状态

回到管理节点服务器Ndb_mgmd上，并启动管理终端：# /usr/bin/ndb_mgm

ndb_mgm> show

Cluster Configuration [ndbd(NDB)]     2 node(s)

id=2 (not connected, accepting connect from 192.168.56.11)

id=3 @192.168.56.12   (Version: 5.0.22, Nodegroup: 0, Master) [ndb_mgmd(MGM)] 1 node(s)

id=1 @192.168.56.30   (Version: 5.0.22) [mysqld(API)] 3 node(s)

id=4 @192.168.56.20   (Version: 5.0.22)

id=5 (not connected, accepting connect from any host)

id=6 (not connected, accepting connect from any host) mysqld(API)即mysqld --ndb-cluster，MySQL服务器节点，应该程序访问的IP。创建数据库（mysqld）：

# /usr/local/mysql/bin/mysql

> use test;

> CREATE TABLE ctest (i INT) ENGINE=NDBCLUSTER;

> INSERT INTO ctest () VALUES (1);

关于MySQL数据库集群负载均衡的配置就介绍到这里了，希望本次的介绍能够对您有所收获