MySQL群集双机模拟方案
| 硬件配置 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 1192.168.1.100 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 在两台主机上执行如下过程 shell>/usr/local/mysql/bin/ndbd 启动完ndbd进程后启动sqld进程 shell>/etc/init.d/mysql.server start 附： config.ini中各部分解释 [COMPUTER]: 定义群集主机. [NDBD]: 定义群集数据节点. [MYSQLD]: 定义Sql server节点. [MGM|NDB_MGMD]: Defines the management server node in the cluster. [TCP]: Defines TCP/IP connections between nodes in the cluster, with TCP/IP being the default connection protocol. [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
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