集群规划：
| 节点 | IP ADDRESS |
| Management Server (ndb_mgmd) | 192.168.6.203 |
| data nodes (ndbd) |
192.168.6.204 192.168.6.205 |
| SQL node (mysqld) |
192.168.6.204 192.168.6.205 |
Mysql Cluster版本：
MySQL Cluster NDB 7.4.12 (5.6.31-ndb-7.4.12),
下载地址: http://dev.mysql.com/downloads/cluster/
集群部署：
1、环境清理及安装:
如果已经存在mysql相关的安装或者依赖包，则先清理mysql的相关安装和依赖
检查mysql是否存在mysql相关依赖包:
rpm -qa | grep mysql*
如存在：mysql-libs-5.1.66-2.el6_3.x86_64
则卸载mysql并删除依赖：
yum -y remove mysql rpm -e --nodeps mysql-libs-5.1.66-2.el6_3.x86_64 ......
2、集群安装：
管理节点:
192.168.6.203
rpm -ivh MySQL-Cluster-server-gpl-7.4.12-1.el6.x86_64.rpm
数据节点 和 mysql server:
192.168.6.204
192.168.6.205
rpm -ivh MySQL-Cluster-server-gpl-7.4.12-1.el6.x86_64.rpm rpm -ivh MySQL-Cluster-client-gpl-7.4.12-1.el6.x86_64.rpm
配置文件：
管理节点配置文件：
在192.168.6.203上创建 /var/lib/mysql-cluster/config.ini ，内容如下
[NDB_MGMD DEFAULT] Portnumber=1186 [NDB_MGMD] NodeId=10 HostName=192.168.6.203 DataDir=/var/lib/mysql-cluster/ Portnumber=1186 [TCP DEFAULT] SendBufferMemory=4M ReceiveBufferMemory=4M [NDBD DEFAULT] NoOfReplicas=2 # Number of replicas DataMemory=800M # How much memory to allocate for data storage IndexMemory=100M # 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. [NDBD] NodeId=20 HostName=192.168.6.204 DataDir=/var/lib/mysql/ [NDBD] NodeId=21 HostName=192.168.6.205 DataDir=/var/lib/mysql/ [MYSQLD DEFAULT] [mysqld] hostname=192.168.6.204 [mysqld] hostname=192.168.6.205
数据节点和mysqld节点：
在192.168.6.20[4,5]上分别创建/etc/my.cnf
[mysqld] # Options for mysqld process: ndbcluster # run NDB storage engine ndb-connectstring="192.168.6.203:1186" [mysql_cluster] # # Options for MySQL Cluster processes: ndb-connectstring="192.168.6.203:1186" # location of management server
3、启动集群：
准备工作：集群每台机器 关闭防火墙；设置selinux的SELINUX=disabled；
先启动管理节点：
192.168.6.203上启动管理节点：
ndb_mgmd -f /var/lib/mysql-cluster/config.ini --initial
再启动数据节点：
192.168.6.20[4,5]上启动数据节点：
ndbd
最后192.168.6.20[4,5]启动mysqld服务：
mysqld_safe --user=mysql &
通过管理节点，查看节点连接状态：
shell> ndb_mgm -- NDB Cluster -- Management Client -- ndb_mgm> show Connected to Management Server at: 192.168.6.203:1186 Cluster Configuration --------------------- [ndbd(NDB)] 2 node(s) id=20 @192.168.6.204 (mysql-5.6.31 ndb-7.4.12, Nodegroup: 0, *) id=21 @192.168.6.205 (mysql-5.6.31 ndb-7.4.12, Nodegroup: 0) [ndb_mgmd(MGM)] 1 node(s) id=10 @192.168.6.203 (mysql-5.6.31 ndb-7.4.12) [mysqld(API)] 2 node(s) id=22 @192.168.6.204 (mysql-5.6.31 ndb-7.4.12) id=23 @192.168.6.205 (mysql-5.6.31 ndb-7.4.12) ndb_mgm>
看到上面的状况，则说明集群启动成功。
进入mysqld，查看mysql是否已经支持分布式存储引擎ndbcluster
shell> mysql -uroot -p mysql> set password=password(‘xxxxxx‘) # 第一次登陆需要修改root 用户的登录密码 mysql> show engines\g; +--------------------+---------+----------------------------------------------------------------+--------------+------+------------+ | Engine | Support | Comment | Transactions | XA | Savepoints | +--------------------+---------+----------------------------------------------------------------+--------------+------+------------+ | ndbcluster | YES | Clustered, fault-tolerant tables | YES | NO | NO | | MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO | | MyISAM | YES | MyISAM storage engine | NO | NO | NO | | BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO | | PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO | | CSV | YES | CSV storage engine | NO | NO | NO | | ARCHIVE | YES | Archive storage engine | NO | NO | NO | | FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL | | InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES | | ndbinfo | YES | MySQL Cluster system information storage engine | NO | NO | NO | | MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO | +--------------------+---------+----------------------------------------------------------------+--------------+------+------------+ 11 rows in set (0.00 sec)
4、测试数据同步：
在192.168.6.204上创建一张t2表:
mysql> use test; Database changed mysql> create table t2(id int, name varchar(20)) engine=ndbcluster; Query OK, 0 rows affected (0.10 sec) mysql> desc t2; +-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | | name | varchar(20) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+ 2 rows in set (0.00 sec)
在192.168.6.205上向表t2插入一条数据：
mysql> desc t2; +-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | | name | varchar(20) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+ 2 rows in set (0.00 sec) mysql> insert into t2 values(1,‘lisan‘); Query OK, 1 row affected (0.00 sec) mysql> select * from t2; +------+-------+ | id | name | +------+-------+ | 1 | lisan | +------+-------+ 1 row in set (0.00 sec)
在204上查看t2表：
mysql> select * from t2; +------+-------+ | id | name | +------+-------+ | 1 | lisan | +------+-------+ 1 row in set (0.00 sec)
看到上面结果，则说明分布式mysql数据同步成功。
安装过程中遇到的问题：
1、Unable to connect with connect string: nodeid=0,localhost:1186 Retrying every 5 seconds. Attempts left: 2 1, failed.
可能原因：软件包安装错误（多装或者是少装都会出错）；config.ini或者my.cnf配置文件有误；
2、Unable to connect with connect string: nodeid=0,192.168.1.102:1186 Retrying every 5 seconds. Attempts left: 12 11 10 9 8 7 6 5 4 3 2 1, failed.
可能原因：防火墙开启，阻止集群数据通信；selinux开启，可以通过setenforce 0 关闭；
时间： 2024-12-29 16:40:43