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4Jun/12

在同一台主机配置MySQL Cluster

Posted by Nick Xu

MySQL cluster是share nothing的集群,采用ndb存储引擎,和Oracle的RAC采用集中存储不同,是一种分布式的架构,所以可以很轻松的实现在同一台主机上配置MySQL Cluster,相对RAC来说要简单得多。

在MySQL Cluster中,有三种不同的节点:

  • 管理节点:守护进程为ndb_mgmd,用于管理cluster。
  • 数据节点: 守护进程为ndbd,用于存放数据
  • SQL节点:守护进程为mysqld,就是一个MySQL实例,对外供客户端连接访问数据。

本文将在一台64位linux主机上同时配置上述三种节点。在实际生产环境中,根据需要,可以在相同或者不同的机器部署节点。本次实例中共包含以下节点:

  • 一个管理节点
  • 两个数据节点
  • 三个SQL节点

下载Mysql cluster,当前版本7.0.6,http://dev.mysql.com/downloads/cluster/7.0.html

解压,并复制到安装目录

tar zxvf mysql-cluster-gpl-7.0.6-linux-x86_64-glibc23.tar.gz
cp mysql-cluster-gpl-7.0.6-linux-x86_64-glibc23 /u01/mysql-cluster

cd /u01/mysql-cluster

创建三个MySQL实例的数据目录

mkdir data/data1
mkdir data/data2
mkdir data/data3

mkdir data/data1/mysql
mkdir data/data1/test

mkdir data/data2/mysql
mkdir data/data2/test

mkdir data/data3/mysql
mkdir data/data3/test

Cluster配置文件如下

$ more conf/config.ini
[ndbd default]
noofreplicas=2
[ndbd]
hostname=localhost
id=2
[ndbd]
hostname=localhost
id=3
[ndb_mgmd]
id = 1
hostname=localhost
[mysqld]
id=4
hostname=localhost
[mysqld]
id=5
hostname=localhost
[mysqld]
id=6
hostname=localhost

三个MySQL实例配置文件如下

$ more conf/my1.cnf
[mysqld]
ndb-nodeid=4
ndbcluster=true
datadir=/u01/mysql-cluster/data/data1
basedir=/u01/mysql-cluster
port=9306
server-id=1
log-bin

$ more conf/my2.cnf
[mysqld]
ndb-nodeid=5
ndbcluster=true
datadir=/u01/mysql-cluster/data/data2
basedir=/u01/mysql-cluster
port=9307
server-id=2
log-bin

$ more conf/my3.cnf
[mysqld]
ndb-nodeid=6
ndbcluster=true
datadir=/u01/mysql-cluster/data/data3
basedir=/u01/mysql-cluster
port=9308
server-id=3
log-bin

初始化三个MySQL实例

script/mysql_install_db --basedir=/u01/mysql-cluster --datadir=/u01/mysql-cluster/data/data1
script/mysql_install_db --basedir=/u01/mysql-cluster --datadir=/u01/mysql-cluster/data/data2
script/mysql_install_db --basedir=/u01/mysql-cluster --datadir=/u01/mysql-cluster/data/data3

初始化管理节点

bin/ndb_mgmd --initial -f conf/config.ini --configdir=/u01/mysql-cluster

进入管理节点查看配置

$ bin/ndb_mgm
-- NDB Cluster -- Management Client --
ndb_mgm> help
---------------------------------------------------------------------------
 NDB Cluster -- Management Client -- Help
---------------------------------------------------------------------------
HELP                                   Print help text
HELP COMMAND                           Print detailed help for COMMAND(e.g. SHOW)
SHOW                                   Print information about cluster
CREATE NODEGROUP ,...          Add a Nodegroup containing nodes
DROP NODEGROUP                     Drop nodegroup with id NG
START BACKUP [NOWAIT | WAIT STARTED | WAIT COMPLETED]
START BACKUP [] [NOWAIT | WAIT STARTED | WAIT COMPLETED]
START BACKUP [] [SNAPSHOTSTART | SNAPSHOTEND] [NOWAIT | WAIT STARTED | WAIT COMPLETED]
                                       Start backup (default WAIT COMPLETED,SNAPSHOTEND)
ABORT BACKUP                Abort backup
SHUTDOWN                               Shutdown all processes in cluster
CLUSTERLOG ON [] ...         Enable Clus
 = ALERT | CRITICAL | ERROR | WARNING | INFO | DEBUG
 = STARTUP | SHUTDOWN | STATISTICS | CHECKPOINT | NODERESTART | CONNECTION
| INFO | ERROR | CONGESTION | DEBUG | BACKUP
    = 0 - 15
       = ALL | Any database node id

For detailed help on COMMAND, use HELP COMMAND.

ndb_mgm> show
Connected to Management Server at: localhost:1186
Cluster Configuration
---------------------
[ndbd(NDB)]     2 node(s)
id=2 (not connected, accepting connect from localhost)
id=3 (not connected, accepting connect from localhost)

[ndb_mgmd(MGM)] 1 node(s)
id=1    @localhost  (mysql-5.1.34 ndb-7.0.6)

[mysqld(API)]   3 node(s)
id=4 (not connected, accepting connect from localhost)
id=5 (not connected, accepting connect from localhost)
id=6 (not connected, accepting connect from localhost)

初始化数据节点

bin/ndbd --initial -c localhost:1186
2009-06-21 23:13:19 [ndbd] INFO     -- Configuration fetched from 'localhost:1186', generation: 1
bin/ndbd --initial -c localhost:1186
2009-06-21 23:13:50 [ndbd] INFO     -- Configuration fetched from 'localhost:1186', generation: 1

启动SQL节点

bin/mysqld --defaults-file=conf/my1.cnf&
[1] 17843
 090621 23:14:36 [Warning] No argument was provided to --log-bin,
and --log-bin-index was not used; so replication may break when this MySQL server acts as a master
and has his hostname changed!! Please use '--log-bin=test-bin' to avoid this problem.
InnoDB: The first specified data file ./ibdata1 did not exist:
InnoDB: a new database to be created!
090621 23:14:36  InnoDB: Setting file ./ibdata1 size to 10 MB
InnoDB: Database physically writes the file full: wait...
090621 23:14:36  InnoDB: Log file ./ib_logfile0 did not exist: new to be created
InnoDB: Setting log file ./ib_logfile0 size to 5 MB
InnoDB: Database physically writes the file full: wait...
090621 23:14:36  InnoDB: Log file ./ib_logfile1 did not exist: new to be created
InnoDB: Setting log file ./ib_logfile1 size to 5 MB
InnoDB: Database physically writes the file full: wait...
InnoDB: Doublewrite buffer not found: creating new
InnoDB: Doublewrite buffer created
InnoDB: Creating foreign key constraint system tables
InnoDB: Foreign key constraint system tables created
090621 23:14:36  InnoDB: Started; log sequence number 0 0
090621 23:14:36 [Note] NDB: NodeID is 4, management server 'localhost:1186'
090621 23:14:37 [Note] NDB[0]: NodeID: 4, all storage nodes connected
090621 23:14:37 [Note] Starting Cluster Binlog Thread
090621 23:14:37 [Note] Event Scheduler: Loaded 0 events
090621 23:14:37 [Note] bin/mysqld: ready for connections.
Version: '5.1.34-ndb-7.0.6-cluster-gpl-log'  socket: '/tmp/mysql.sock'
port: 9306  MySQL Cluster Server (GPL)
090621 23:14:38 [Note] NDB Binlog: Ndb tables initially read only.
090621 23:14:38 [Note] NDB: Creating mysql.ndb_schema
090621 23:14:38 [Note] NDB Binlog: CREATE TABLE Event: REPL$mysql/ndb_schema
090621 23:14:38 [Note] NDB Binlog: logging ./mysql/ndb_schema (UPDATED,USE_WRITE)
090621 23:14:38 [Note] NDB: Creating mysql.ndb_apply_status
090621 23:14:39 [Note] NDB Binlog: CREATE TABLE Event: REPL$mysql/ndb_apply_status
090621 23:14:39 [Note] NDB Binlog: logging ./mysql/ndb_apply_status (UPDATED,USE_WRITE)
2009-06-21 23:14:39 [NdbApi] INFO     -- Flushing incomplete GCI:s < 20/3
2009-06-21 23:14:39 [NdbApi] INFO     -- Flushing incomplete GCI:s < 20/3
090621 23:14:39 [Note] NDB Binlog: starting log at epoch 20/3
090621 23:14:39 [Note] NDB Binlog: ndb tables writable
bin/mysqld --defaults-file=conf/my2.cnf&
bin/mysqld --defaults-file=conf/my3.cnf&

查看cluster

bin/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    @127.0.0.1  (mysql-5.1.34 ndb-7.0.6, Nodegroup: 0, Master)
id=3    @127.0.0.1  (mysql-5.1.34 ndb-7.0.6, Nodegroup: 0)

[ndb_mgmd(MGM)] 1 node(s)
id=1    @127.0.0.1  (mysql-5.1.34 ndb-7.0.6)

[mysqld(API)]   3 node(s)
id=4    @127.0.0.1  (mysql-5.1.34 ndb-7.0.6)
id=5    @127.0.0.1  (mysql-5.1.34 ndb-7.0.6)
id=6    @127.0.0.1  (mysql-5.1.34 ndb-7.0.6)

创建测试表

bin/mysql -uroot -h localhost -P 9306  --socket=/tmp/mysql.sock
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.1.34-ndb-7.0.6-cluster-gpl-log MySQL Cluster Server (GPL)

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

root@(none) 11:21:24>use test
Database changed
root@test 11:21:26>create table test_ndb(i int,a varchar(20),primary key(i)) engine=ndb;
090621 23:22:32 [Note] NDB Binlog: CREATE TABLE Event: REPL$test/test_ndb
090621 23:22:32 [Note] NDB Binlog: logging ./test/test_ndb (UPDATED,USE_WRITE)
090621 23:22:32 [Note] NDB Binlog: DISCOVER TABLE Event: REPL$test/test_ndb
090621 23:22:32 [Note] NDB Binlog: DISCOVER TABLE Event: REPL$test/test_ndb
090621 23:22:32 [Note] NDB Binlog: logging ./test/test_ndb (UPDATED,USE_WRITE)
090621 23:22:32 [Note] NDB Binlog: logging ./test/test_ndb (UPDATED,USE_WRITE)
Query OK, 0 rows affected (1.10 sec)

root@test 11:22:32>insert into test_ndb values(1,'NinGoo');
Query OK, 1 row affected (0.02 sec)

[mysql@dbconsole mysql-cluster]$ ls -l data/data1/test
total 12
-rw-rw----  1 mysql dba 8578 Jun 21 23:22 test_ndb.frm
-rw-rw----  1 mysql dba    0 Jun 21 23:22 test_ndb.ndb
[mysql@dbconsole mysql-cluster]$ ls -l data/data2/test
total 12
-rw-rw----  1 mysql dba 8578 Jun 21 23:22 test_ndb.frm
-rw-rw----  1 mysql dba    0 Jun 21 23:22 test_ndb.ndb
[mysql@dbconsole mysql-cluster]$ ls -l data/data3/test
total 12
-rw-rw----  1 mysql dba 8578 Jun 21 23:22 test_ndb.frm
-rw-rw----  1 mysql dba    0 Jun 21 23:22 test_ndb.ndb

$ bin/mysql -uroot -P 9307 --socket=/tmp/mysql.sock
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 3
Server version: 5.1.34-ndb-7.0.6-cluster-gpl-log MySQL Cluster Server (GPL)

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

root@(none) 11:24:38>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
root@test 11:24:41>select * from test_ndb;
+---+--------+
| i | a      |
+---+--------+
| 1 | NinGoo |
+---+--------+
1 row in set (0.02 sec)

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