实用心得：MySQL群集双机模拟方案

时间：2008-03-26 来源：sdccf

来源：赛迪网技术社区作者：daniey

普通PC server * 2 (最小集群环境需要4台服务器）

模拟环境

red hat linux9 for x86 (or red hat AS 2以上版本),glibc-2.2, static, gcc

MySQL版本4.1.12 binares

mysql-max binary版本目前只支持linux、max os x和solaris

本方案不涉及从源代码编译安装。

主机 IP地址 用途 ndb1_mgmd_sqld 192.168.1.100 Ndb node1+mgmd node1+sqld node1 ndb2_sqld2 192.168.1.200 Ndb node2+sqld node2 Mgmd:management server sqld:mysql server ndb:storaged node (share-nothing,base in memory)

安装

从http://dev.mysql.com/downloads/mysql/4.1.html下载mysql-max-4.1.12-pc-linux-gnu-i686.tar.gz到/var/tmp

Storage and SQL Node Installation

在两台主机上执行如下过程：

shell>;groupadd mysql shell>;useradd -g mysql mysql shell>;tar zxfv mysql-max-4.1.12-pc-linux-gnu-i686.tar.gz shell>;cp -vr mysql-max-4.1.12-pc-linux-gnu-i686 /usr/local/mysql-max-4.1.12-pc-linux-gnu-i686 shell>;cd /usr/local shell>;ln -s mysql-max-4.1.12-pc-linux-gnu-i686 mysql shell>;cd mysql;scripts/mysql_install_db –user=mysql shell>;chown -R root .;chown -R mysql data;chgrp -R mysql . shell>;cp support-files/mysql.server /etc/rc.d/init.d/ shell>;chmod +x /etc/rc.d/init.d/mysql.server shell>;chkconfig --add mysql.server shell>;chkconfig –level 3 mysql.server off

Management Node Installation

在主机ndb1_mgmd_sqld1上执行如下过程：

shell>;cd /var/tmp shell>;tar -zxvf mysql-max-4.1.12a-pc-linux-gnu-i686.tar.gz /usr/local/bin '*/bin/ndb_mgm*' Configuration Configuring the Storage and SQL Nodes 在两台主机上执行如下过程： shell>;vi /etc/my.cnf [MYSQLD] # Options for mysqld process: ndbcluster # run NDB engine ndb-connectstring=192.168.1.100 # location of MGM node [MYSQL_CLUSTER] # Options for ndbd process: ndb-connectstring=192.168.1.100 # location of MGM node Configuring the Management Node 在主机ndb1_mgmd_sqld1上执行如下过程 shell>;mkdir /var/lib/mysql-cluster shell>;cd /var/lib/mysql-cluster shell>;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] [NDB_MGMD] # Management process options: hostname=192.168.1.100 # Hostname or IP address of MGM node datadir=/var/lib/mysql-cluster # Directory for MGM node logfiles [NDBD] # Options for data node "A": # (one [NDBD] section per data node) HostName=192.168.1.100 # Hostname or IP address DataDir=/usr/local/mysql/data # Directory for this data node's datafiles [NDBD] # Options for data node "B": hostname=192.168.1.200 # Hostname or IP address datadir=/usr/local/mysql/data # Directory for this data node's datafiles [MYSQLD] # SQL node options: hostname=192.168.1.100 # Hostname or IP address # Directory for SQL node's datafiles # (additional mysqld connections can be # specified for this node for various # purposes such as running ndb_restore) [MYSQLD] # SQL node options: hostname=192.168.1.200 # Hostname or IP address # Directory for SQL node's datafiles # (additional mysqld connections can be # specified for this node for various # purposes such as running ndb_restore)

第一次启动

在主机ndb1_mgmd_sqld1上执行如下过程：

shell>; ndb_mgmd -f /var/lib/mysql-cluster/config.ini

在两台主机上执行如下过程

shell>;ndbd –initial (note:--initial选项只能在第一次启动的时候使用)

shell>;/etc/init.d/mysql.server start

测试

在主机ndb1_mgmd_sqld1上执行如下过程：

shell>; ndb_mgm -- NDB Cluster -- Management Client -- ndb_mgm>; show Connected to Management Server at: localhost:1186 Cluster Configuration --------------------- [ndbd(NDB)] 2 node(s) id=2 @192.168.0.100 (Version: 4.1.12, Nodegroup: 0, Master) id=3 @192.168.0.200 (Version: 4.1.12, Nodegroup: 0) [ndb_mgmd(MGM)] 1 node(s) id=1 @192.168.0.100 (Version: 4.1.12) [mysqld(SQL)] 1 node(s) id=4 (Version: 4.1.12)

出现如上信息则表示mysql群集安装成功。

数据抽样测试

在主机ndb1_mgmd_sqld1上执行如下过程：

shell>;/usr/local/mysql/bin/mysql -u root test MySQL>;DROP TABLE IF EXISTS City; CREATE TABLE City ( ID int(11) NOT NULL auto_increment, Name char(35) NOT NULL default '', CountryCode char(3) NOT NULL default '', District char(20) NOT NULL default '', Population int(11) NOT NULL default '0', PRIMARY KEY (ID) ) ENGINE=NDBCLUSTER; MySQL>;INSERT INTO City VALUES (1,'Kabul','AFG','Kabol',1780000); INSERT INTO City VALUES (2,'Qandahar','AFG','Qandahar',237500); INSERT INTO City VALUES (3,'Herat','AFG','Herat',186800);

在主机ndb2_sqld2上执行如下过程：

shell>;/usr/local/mysql/bin/mysql -u root mysql

MySQSL>;select * from City;

如果成功显示数据信息，则表示集群已经成功启动。

Safe Shutdown and Restart

在主机ndb1_mgmd_sqld1上执行如下过程：

shell>;ndb_mgm -e shutdown （关闭集群服务器，storage node也会自动被关闭。)

在两台主机上执行如下过程：

shell>;/etc/init.d/mysql.server stop

重新启动集群(顺序不能弄错)

在主机ndb1_mgmd_sqld1上执行如下过程：

shell>; ndb_mgmd -f /var/lib/mysql-cluster/config.ini