配置 MySQL cluster

  1. 云栖社区>
  2. 博客>
  3. 正文

配置 MySQL cluster

余二五 2017-11-16 18:57:00 浏览734
展开阅读全文

 

一,基本概念:

NDB是一种“内存中”存储引擎,它具有可用性高和数据一致性好的特点。能够使用多种故障切换和负载平衡选项配置NDB存储引擎,但以簇层面上的存储引擎开始最简单。MySQL簇的NDB存储引擎包含完整的数据集,仅取决于簇本身内的其他数据。

下面,我们介绍了设置由NDB存储引擎和一些MySQL服务器构成的MySQL簇的设置方法。

目前,MySQL簇的簇部分可独立于MySQL服务器进行配置。在MySQL簇中,簇的每个部分被视为1个节点。

 

  

有三类簇节点,在最低的MySQL簇配置中,至少有三个节点,这三类节点分别是:

管理(MGM)节点:这类节点的作用是管理MySQL簇内的其他节点,如提供配置数据、启动并停止节点、运行备份等。由于这类节点负责管理其他节点的配置,应在启动其他节点之前首先启动这类节点。MGM节点是用命令ndb_mgmd启动的。

 

数据节点:这类节点用于保存簇的数据。数据节点的数目与副本的数目相关,是片段的倍数。例如,对于两个副本,每个副本有两个片段,那么就有4个数据节点。没有必要有一个以上的副本。数据节点是用命令ndbd启动的。

 

SQL节点:这是用来访问簇数据的节点。对于MySQL簇,客户端节点是使用NDB簇存储引擎的传统MySQL服务器。典型情况下,SQL节点是使用命令mysqld –ndbcluster启动的,或将ndbcluster添加到my.cnf后使用mysqld启动。

 

簇配置包括对簇中单独节点的配置,以及设置节点之间的单独通信链路。对于目前设计的MySQL簇,其意图在于,从处理器的能力、内存空间和带宽来讲,存储节点是同质的,此外,为了提供单一的配置点,作为整体,簇的所有配置数据均位于1个配置文件中。

 

管理服务器(MGM节点)负责管理簇配置文件和簇日志。簇中的每个节点从管理服务器检索配置数据,并请求确定管理服务器所在位置的方式。当数据节点内出现有趣的事件时,节点将关于这类事件的信息传输到管理服务器,然后,将这类信息写入簇日志。

 

 

二,配置实例:

服务器使用情况:

Node

IP Address

Management (MGMD) node

192.168.0.10

MySQL server (SQL) node

192.168.0.20

Data (NDBD) node "A"

192.168.0.30

Data (NDBD) node "B"

192.168.0.40

 

 1,安装ManagementSql node Data node 重复以下步骤:

[root@www local]# tar -zxvf mysql-cluster-gpl-7.1.3-linux-i686-glibc23.tar.gz

[root@www local]# mv mysql-cluster-gpl-7.1.3-linux-i686-glibc23 mysql

[root@www local]# groupadd mysql

[root@www local]# useradd -g mysql mysql

[root@www local]# chown -R mysql.mysql mysql

[root@www local]# /usr/local/mysql/scripts/mysql_install_db  --user=mysql

[root@www mysql]# cp support-files/mysql.server /etc/rc.d/init.d/

[root@www mysql]# chmod +x /etc/rc.d/init.d/mysql.server

[root@www mysql]# chkconfig --add mysql.server

  

2,配置Management节点:

[root@www mysql]# mkdir /var/lib/mysql-cluster

[root@www mysql]# vi /var/lib/mysql-cluster/config.ini

[ndbd default]

NoOfReplicas=2    # Number of replicas

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

IndexMemory=18M   # 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/IP options:

[tcp default]

portnumber=2202   # This the default; however, you can use any port that is free

                  # for all the hosts in the cluster

                  # Note: It is recommended that you do not specify the port

                  # number at all and allow the default value to be used instead

 

# Management process options:

[ndb_mgmd]

hostname=192.168.0.10           # Hostname or IP address of management node

datadir=/var/lib/mysql-cluster  # Directory for management node log files

 

# Options for data node "A":

[ndbd]

                                # (one [ndbd] section per data node)

hostname=192.168.0.30           # Hostname or IP address

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

 

# Options for data node "B":

[ndbd]

hostname=192.168.0.40           # Hostname or IP address

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

 

# SQL node options:

[mysqld]

hostname=192.168.0.20           # Hostname or IP address

                                # (additional mysqld connections can be

                                # specified for this node for various

                                # purposes such as running ndb_restore)

 

[root@www mysql-cluster]# cp bin/ndb_mgm* /usr/local/bin

 

3,配置MySQL server (SQL) node

创建  /etc/my.cnf并添加下面的内容

#ptions for mysqld process:

[mysqld]

ndbcluster                      # run NDB storage engine

ndb-connectstring=192.168.0.10  # location of management server

 

# Options for ndbd process:

[mysql_cluster]

ndb-connectstring=192.168.0.10  # location of management server

 

4,配置 Data (NDBD) node "A"

创建/etc/my.cnf文件,并添加下面的内容

#ptions for mysqld process:

[mysqld]

ndbcluster                      # run NDB storage engine

ndb-connectstring=192.168.0.10  # location of management server

 

# Options for ndbd process:

[mysql_cluster]

ndb-connectstring=192.168.0.10  # location of management server

 

5,配置 Data (NDBD) node "B"

创建/etc/my.cnf文件,并添加下面的内容

#ptions for mysqld process:

[mysqld]

ndbcluster                      # run NDB storage engine

ndb-connectstring=192.168.0.10  # location of management server

 

# Options for ndbd process:

[mysql_cluster]

ndb-connectstring=192.168.0.10  # location of management server

 

6,启动Management节点:

[root@www local]# ndb_mgmd -f /var/lib/mysql-cluster/config.ini

2010-05-05 13:20:19 [MgmtSrvr] INFO     -- NDB Cluster Management Server. mysql-5.1.44 ndb-7.1.3

2010-05-05 13:20:19 [MgmtSrvr] INFO     -- Loaded config from '/usr/local/mysql/mysql-cluster/ndb_1_config.bin.1'

 

7,起动  Data (NDBD) node "A" Data (NDBD) node "B"

[root@www local]# /usr/local/mysql/bin/ndbd

2010-05-05 13:20:30 [ndbd] INFO     -- Configuration fetched from '192.168.0.10:1186', generation: 1

 

8,起动  MySQL server (SQL) node

[root@www local]# /etc/init.d/mysql.server start

 

 

9,如果一切顺利,执行ndb_mgm命令之后,其输出如下:

[root@www local]# 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    @192.168.0.30  (mysql-5.1.44 ndb-7.1.3, Nodegroup: 0, Master)
id=3    @192.168.0.40  (mysql-5.1.44 ndb-7.1.3, Nodegroup: 0)
[ndb_mgmd(MGM)] 1 node(s)
id=1    @192.168.0.10  (mysql-5.1.44 ndb-7.1.3)
[mysqld(API)]   1 node(s)
id=4    @192.168.0.20  (mysql-5.1.44 ndb-7.1.3)
 

 

测试单点故障:
1,模拟NDB节点崩溃:
Data (NDBD) node "A"
[root@www ~]# netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 127.0.0.1:2208              0.0.0.0:*                   LISTEN      4456/hpiod          
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      4240/portmap        
tcp        0      0 0.0.0.0:627                 0.0.0.0:*                   LISTEN      4261/rpc.statd      
tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      4487/cupsd          
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      4507/sendmail: acce 
tcp        0      0 192.168.0.30:2202           0.0.0.0:*                   LISTEN      6205/ndbd           
tcp        0      0 127.0.0.1:2207              0.0.0.0:*                   LISTEN      4461/python         
tcp        0      0 :::3306                     :::*                        LISTEN      11766/mysqld        
tcp        0      0 :::22                       :::*                        LISTEN      4476/sshd           
udp        0      0 0.0.0.0:32768               0.0.0.0:*                               4617/avahi-daemon:  
udp        0      0 0.0.0.0:5353                0.0.0.0:*                               4617/avahi-daemon:  
udp        0      0 0.0.0.0:621                 0.0.0.0:*                               4261/rpc.statd      
udp        0      0 0.0.0.0:111                 0.0.0.0:*                               4240/portmap        
udp        0      0 0.0.0.0:624                 0.0.0.0:*                               4261/rpc.statd      
udp        0      0 0.0.0.0:631                 0.0.0.0:*                               4487/cupsd          
udp        0      0 :::32769                    :::*                                    4617/avahi-daemon:  
udp        0      0 :::5353                     :::*                                    4617/avahi-daemon:  
[root@www ~]# kill -9 6205
[root@www ~]# netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 127.0.0.1:2208              0.0.0.0:*                   LISTEN      4456/hpiod          
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      4240/portmap        
tcp        0      0 0.0.0.0:627                 0.0.0.0:*                   LISTEN      4261/rpc.statd      
tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      4487/cupsd          
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      4507/sendmail: acce 
tcp        0      0 127.0.0.1:2207              0.0.0.0:*                   LISTEN      4461/python         
tcp        0      0 :::3306                     :::*                        LISTEN      11766/mysqld        
tcp        0      0 :::22                       :::*                        LISTEN      4476/sshd           
udp        0      0 0.0.0.0:32768               0.0.0.0:*                               4617/avahi-daemon:  
udp        0      0 0.0.0.0:5353                0.0.0.0:*                               4617/avahi-daemon:  
udp        0      0 0.0.0.0:621                 0.0.0.0:*                               4261/rpc.statd      
udp        0      0 0.0.0.0:111                 0.0.0.0:*                               4240/portmap        
udp        0      0 0.0.0.0:624                 0.0.0.0:*                               4261/rpc.statd      
udp        0      0 0.0.0.0:631                 0.0.0.0:*                               4487/cupsd          
udp        0      0 :::32769                    :::*                                    4617/avahi-daemon:  
udp        0      0 :::5353                     :::*                                    4617/avahi-daemon:  
[root@www ~]# kill -9

 

mysql> use test;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> select * from youshengtao;
+------+
| a    |
+------+
|  400 |
|  300 |
|  200 |
|  500 |
+------+
4 rows in set (0.60 sec)


 

2, 在 MySQL server (SQL) node执行查询,可见down掉其中的一台data node,对cluster没有任何影响
mysql> use test;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> select * from youshengtao;
+------+
| a    |
+------+
|  400 |
|  300 |
|  200 |
|  500 |
+------+
4 rows in set (0.60 sec)


3,模拟NDB节点崩溃:
Data (NDBD) node "B"
[root@www ~]# netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 127.0.0.1:2208              0.0.0.0:*                   LISTEN      4453/hpiod          
tcp        0      0 0.0.0.0:622                 0.0.0.0:*                   LISTEN      4256/rpc.statd      
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      4235/portmap        
tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      4484/cupsd          
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      4504/sendmail: acce 
tcp        0      0 192.168.0.40:2202           0.0.0.0:*                   LISTEN      6105/ndbd           
tcp        0      0 127.0.0.1:2207              0.0.0.0:*                   LISTEN      4458/python         
tcp        0      0 :::3306                     :::*                        LISTEN      11940/mysqld        
tcp        0      0 :::22                       :::*                        LISTEN      4473/sshd           
udp        0      0 0.0.0.0:32768               0.0.0.0:*                               4614/avahi-daemon:  
udp        0      0 0.0.0.0:616                 0.0.0.0:*                               4256/rpc.statd      
udp        0      0 0.0.0.0:5353                0.0.0.0:*                               4614/avahi-daemon:  
udp        0      0 0.0.0.0:619                 0.0.0.0:*                               4256/rpc.statd      
udp        0      0 0.0.0.0:111                 0.0.0.0:*                               4235/portmap        
udp        0      0 0.0.0.0:631                 0.0.0.0:*                               4484/cupsd          
udp        0      0 :::32769                    :::*                                    4614/avahi-daemon:  
udp        0      0 :::5353                     :::*                                    4614/avahi-daemon:  
[root@www ~]# kill -9 6105
[root@www ~]# netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 127.0.0.1:2208              0.0.0.0:*                   LISTEN      4453/hpiod          
tcp        0      0 0.0.0.0:622                 0.0.0.0:*                   LISTEN      4256/rpc.statd      
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      4235/portmap        
tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      4484/cupsd          
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      4504/sendmail: acce 
tcp        0      0 127.0.0.1:2207              0.0.0.0:*                   LISTEN      4458/python         
tcp        0      0 :::3306                     :::*                        LISTEN      11940/mysqld        
tcp        0      0 :::22                       :::*                        LISTEN      4473/sshd           
udp        0      0 0.0.0.0:32768               0.0.0.0:*                               4614/avahi-daemon:  
udp        0      0 0.0.0.0:616                 0.0.0.0:*                               4256/rpc.statd      
udp        0      0 0.0.0.0:5353                0.0.0.0:*                               4614/avahi-daemon:  
udp        0      0 0.0.0.0:619                 0.0.0.0:*                               4256/rpc.statd      
udp        0      0 0.0.0.0:111                 0.0.0.0:*                               4235/portmap        
udp        0      0 0.0.0.0:631                 0.0.0.0:*                               4484/cupsd          
udp        0      0 :::32769                    :::*                                    4614/avahi-daemon:  
udp        0      0 :::5353                     :::*                                    4614/avahi-daemon:  
[root@www ~]#



4,在 MySQL server (SQL) node执行查询,data node节点全down掉之后无法进行查询了:
mysql> select * from youshengtao;
ERROR 1296 (HY000): Got error 157 'Unknown error code' from NDBCLUSTER
mysql> select * from youshengtao;
ERROR 1296 (HY000): Got error 157 'Unknown error code' from NDBCLUSTER
mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| t1             |
| youshengtao    |
+----------------+
2 rows in set (0.00 sec)
mysql> desc youshengtao;
ERROR 1296 (HY000): Got error 157 'Unknown error code' from NDBCLUSTER
mysql> desc t1;
ERROR 1296 (HY000): Got error 157 'Unknown error code' from NDBCLUSTER










本文转自 trt2008 51CTO博客,原文链接:http://blog.51cto.com/chlotte/371368,如需转载请自行联系原作者

网友评论

登录后评论
0/500
评论
余二五
+ 关注