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php爱好者> php文档>mysql负载均衡集群架设

mysql负载均衡集群架设

时间：2007-12-18 来源：jeffray_lee

1 环境描述

Mysql manager 节点：192.168.0.1

MysqlServer节点：192.168.0.100

Mysql 节点：192.168.0.160

Mysql 节点：192.168.0.161

说明：至少需要四台服务器才可以做mysql的集群。建议5台，再增加一台MysqlServer。

2 安装mysql二进制包

2.1 安装之前的准备工作

下载mysql-max-4.1.13-pc-linux-gnu-i686.tar.gz包

（注意：可以做集群的mysql都是mysql-max的,下载地点www.mysql.org）

#groupadd mysql

#useradd -g mysql mysql

#cd /usr/local

#tar xfz mysql-max-4.1.13-pc-linux-gnu-i686.tar.gz

#ln -s /usr/local/mysql-max-4.1.13-pc-linux-gnu-i686 /opt/mysql4.1.13

2.2 分别在manager，server，node节点上安装二进制的mysql包

#cd mysql4.1.13

#scripts/mysql_install_db --user=mysql (必须带目录执行，否则出错)

#chown -R root /opt/mysql4.1.13

#chgrp -R mysql /opt/mysql4.1.13

#chown -R mysql.mysql /opt/mysql4.1.13/data

#cp support-files/mysql.server /etc/rc.d/init.d/ 配置mysql启动设置
#chmod +x /etc/rc.d/init.d/mysql.server
#chkconfig --add mysql.server

3 配置server，note节点

在192.168.0.160和192.168.0.161机器上

# cp support-files/my-medium.cnf data/my.cnf 将mysql的配置文件考到data下

Vi /usr/local/mysql-max-4.1.13-pc-linux-gnu-i686/data/my.cnf

[MYSQLD]

ndbcluster

ndb-connectstring=192.168.0.1

[MYSQL_CLUSTER]

ndb-connectstring=192.168.0.1

4 配置Management管理节点

在192.168.0.1机器上

#mkdir /var/lib/mysql-cluster

#cd /var/lib/mysql-cluster

#vi config.ini

[NDBD DEFAULT] # Options affecting ndbd processes on all data nodes:

NoOfReplicas=2 # Number of replicas

DataMemory=80M # How much memory to allocate for data storage

IndexMemory=52M # How much memory to allocate for index storage

# For DataMemory and IndexMemory, we have used the

# default values. Since the "world" database takes up

# only about 500KB, this should be more than enough for

# this example Cluster setup.

[TCP DEFAULT] # TCP/IP options:

portnumber=2202 # This the default; however, you can use any

# port that is free for all the hosts in cluster

# Note: It is recommended beginning with MySQL 5.0 that

# you do not specify the portnumber at all and simply allow

# the default value to be used instead

# Management process options（定义管理节点.）

[NDB_MGMD]

hostname=192.168.0.1 # 管理节点Hostname or IP address of MGM node

datadir=/var/lib/mysql-cluster # Directory for MGM node logfiles

# Options for data node "A"（定义群集数据节点.）

# (one [NDBD] section per data node)

[NDBD]

hostname=192.168.0.160 # 节点Hostname or IP address

datadir=/usr/local/mysql/data # Directory for this data node's datafiles

# Options for data node "B"（定义群集数据节点.）

[NDBD]

hostname=192.168.0.161 # 节点Hostname or IP address

datadir=/usr/local/mysql/data # Directory for this data node's datafiles

# SQL node options（定义Sql server节点.）

[MYSQLD]

hostname=192.168.0.100 # SQL节点Hostname or IP address

#datadir=/usr/local/mysql/data # Directory for SQL node's datafiles

# (additional mysqld connections can be

# specified for this node for various

# purposes such as running ndb_restore)

[NDB_MGMD]:后面不能有任何注释信息，否则提示：

Error line 17: [TCP] Unknown parameter: [NDB_MGMD] # Management process options

Error line 17: Could not parse name-value pair in config file.

[SHM]: Defines shared-memory connections between nodes. 在MySQL 4.1.9之前，这个功能必须使用--with-ndb-shm option编译进去, 从MySQL 4.1.9-max版本开始, it is enabled by default

5 启动mysql集群

5.1 初始化启动mysql集群服务

1）启动MysqlManagement管理节点（192.168.0.1）

#ndb_mgmd -f /var/lib/mysql-cluster/config.ini

2）启动Data Node节点(192.168.0.160,192.168.0.161)

#ndbd --initial

(注意：这个参数只能在第一次启动DataNode节点时使用，因为―initial参数会删除一些ndbd 实例先前创建的所有文件)

3）启动MysqlServer节点(192.168.0.100)

# ./mysql.server start

5.2 重启mysql集群服务

1）启动MysqlManagement管理节点（192.168.0.1）

#ndb_mgmd -f /var/lib/mysql-cluster/config.ini

2）启动Data Node节点(192.168.0.160,192.168.0.161)

#ndbd

3）启动MysqlServer节点(192.168.0.100)

# ./mysql.server start

(注意：Management管理节点和DataNote节点都不开启mysql服务，只有MysqlServer节点开启。The default port for Cluster management nodes is 1186; the default port for data nodes is 2202.)