MySQL Cluster 開發環境簡明部署(中文)

主要內容

1. 獲取; 2. 安裝; 3. 配置; 4. 運行; 5. 測試; 6. 停止; 7. 總結

1. 獲取

這個不必多言吧，到 MySQL 網站上面下載就是了。MySQL Cluster 的英文部署測試手冊很簡明，這里和其內容基本一樣。喜歡讀英文版的朋友可以直接下載，略過本文。

2. 安裝

先解壓，然后創建一個 symbolic link：

michael@linux:~$ tar xvf mysql-cluster-gpl-7.2.4-linux2.6-x86_64.tar
michael@linux:~$ ln -s mysql-cluster-gpl-7.2.4-linux2.6-x86_64 mysqlc

如果你愿意，可以將~/mysqlc/bin加入到你的 path 里，方便使用。

3. 配置

作為在開發環境上第一次部署，還是以測試為主要目的。一個完整的 MySQL Cluster 由 MySQL Server，Data Nodes，Management Node 三部分組成。首先我們為它們創建一些必須的目錄：

michael@linux:~$ mkdir mysql-cluster
michael@linux:~$ cd mysql-cluster
michael@linux:~$ mkdir conf ndb_data mysqld_data

然后在conf目錄下創建如下兩個文件，分別是config.ini和my.cnf，內容如下：

config.ini

用于 MySQL Server 的配置，端口號port根據你自己的情況設定。

[mysqld]
ndbcluster
datadir=/home/user1/my_cluster/mysqld_data
basedir=/home/user1/mysqlc
port=5050

my.cnf

該文件用于配置各結點的 NodeId 和 Data Nodes 與 Management Node 的數據目錄。

[ndb_mgmd]
hostname=localhost
datadir=/home/user1/my_cluster/ndb_data
NodeId=1

[ndbd default]
noofreplicas=2
datadir=/home/user1/my_cluster/ndb_data

[ndbd]
hostname=localhost
NodeId=3

[ndbd]
hostname=localhost
NodeId=4

[mysqld]
NodeId=50

這時你的目錄結構應該如下：

~
+-- /mysql-cluster-gpl-7.2.4-linux2.6-x86_64
+-- /mysqlc -> mysql-cluster-gpl-7.2.4-linux2.6-x86_64
+-- /mysql-cluster
    +-- /conf
    +-- /ndb_data
    +-- /mysqld_data

4. 運行

MySQL Cluster 的啟動順序是有要求的，如下：

1. Management Node
2. Data Nodes
3. MySQL Server

命令如下：

michael@linux:~$ cd ../mysql-cluster
michael@linux:~/mysql-cluster$ $HOME/mysqlc/bin/ndb_mgmd -f conf/config.ini --initial --configdir=$HOME/mysql-cluster/conf/
michael@linux:~/mysql-cluster$ $HOME/mysqlc/bin/ndbd -c localhost:1186
michael@linux:~/mysql-cluster$ $HOME/mysqlc/bin/ndbd -c localhost:1186

檢查已經啟動的結點的狀態，命令為：

poecahnt@linux:~$ $HOME/mysqlc/bin/ndb_mgm -e show

輸出如下：

Connected to Management Server at: localhost:1186
Cluster Configuration
---------------------
[ndbd(NDB)]     2 node(s)
id=3    @127.0.0.1  (mysql-5.5.19 ndb-7.2.4, Nodegroup: 0, Master)
id=4    @127.0.0.1  (mysql-5.5.19 ndb-7.2.4, Nodegroup: 0)

[ndb_mgmd(MGM)] 1 node(s)
id=1    @127.0.0.1  (mysql-5.5.19 ndb-7.2.4)

[mysqld(API)]   1 node(s)
id=50   @127.0.0.1  (mysql-5.5.19 ndb-7.2.4)

表示已經可以啟動 MySQL Server 了。最后啟動 MySQL Server，命令為：

michael@linux:~/mysql-cluseter$ $HOME/mysqlc/bin/mysqld --defaults-file=conf/my.cnf &

輸出信息如下：

120223 15:29:02 InnoDB: The InnoDB memory heap is disabled
120223 15:29:02 InnoDB: Mutexes and rw_locks use GCC atomic builtins
120223 15:29:02 InnoDB: Compressed tables use zlib 1.2.3
120223 15:29:02 InnoDB: Using Linux native AIO
120223 15:29:02 InnoDB: Initializing buffer pool, size = 128.0M
120223 15:29:02 InnoDB: Completed initialization of buffer pool
120223 15:29:02 InnoDB: highest supported file format is Barracuda.
120223 15:29:02  InnoDB: Waiting for the background threads to start
120223 15:29:03 InnoDB: 1.1.8 started; log sequence number 1595675
120223 15:29:04 [Note] NDB: NodeID is 50, management server 'localhost:1186'
120223 15:29:04 [Note] NDB[0]: NodeID: 50, all storage nodes connected
120223 15:29:04 [Warning] NDB: server id set to zero - changes logged to bin log with   server id zero will be logged with another server id by slave mysqlds
120223 15:29:04 [Note] Starting Cluster Binlog Thread
120223 15:29:04 [Note] Event Scheduler: Loaded 0 events
120223 15:29:04 [Note] $HOME/mysqlc/bin/mysqld: ready for connections.
Version: '5.5.19-ndb-7.2.4-gpl'  socket: '/tmp/mysql.sock'  port: 5050  MySQL Cluster Community Server (GPL)
120223 15:29:05 [Note] NDB: Creating mysql.ndb_schema
120223 15:29:08 [Note] NDB Binlog: CREATE TABLE Event: REPL$mysql/ndb_schema
120223 15:29:09 [Note] NDB Binlog: logging ./mysql/ndb_schema (UPDATED,USE_WRITE)
120223 15:29:09 [Note] NDB: Creating mysql.ndb_apply_status
120223 15:29:09 [Note] NDB Binlog: CREATE TABLE Event: REPL$mysql/ndb_apply_status
120223 15:29:09 [Note] NDB Binlog: logging ./mysql/ndb_apply_status (UPDATED,USE_WRITE)
120223 15:29:09 [Note] NDB: missing frm for mysql.ndb_index_stat_sample, discovering...
120223 15:29:09 [Note] NDB: missing frm for mysql.ndb_index_stat_head, discovering...
2012-02-23 15:29:10 [NdbApi] INFO     -- Flushing incomplete GCI:s < 579/14
2012-02-23 15:29:10 [NdbApi] INFO     -- Flushing incomplete GCI:s < 579/14
120223 15:29:10 [Note] NDB Binlog: starting log at epoch 579/14
120223 15:29:10 [Note] NDB Binlog: ndb tables writable

5. 測試

連接 MySQL Server 進行測試，確認可以用ndb存儲引擎來創建數據庫中的表，如下：

michael@linux:~$ $HOME/mysqlc/bin/mysql -h 127.0.0.1 -P 5050
mysql> create database clusterdb;
mysql> use clusterdb;
mysql> insert into simples values (1),(2),(3),(4);
mysql> select * from simples;

        +----+
        | id |
        +----+
        |  3 |
        |  1 |
        |  2 |
        |  4 |
        +----+

6. 停止

MySQL Cluster 必須手動停止，Data Nodes 可以用 ndb_mgm 來停止：

michael@linux:~$ $HOME/mysqlc/bin/mysqladmin -h 127.0.0.1 -P 5050 shutdown

如果提示：

/home/michael/mysqlc/bin/mysqladmin: shutdown failed; error: 'Access denied; you need (at least one of) the SHUTDOWN privilege(s) for this operation'

則在shutdown命令前加上sudo。

michael@linux:~$ $HOME/mysqlc/bin/ndb_mgm -e shutdown

正常停止的信息類似如下：

120223 16:44:11 [Note] /home/michael/mysqlc/bin/mysqld: Normal shutdown

michael@linux:~/mysql-cluster$ 120223 16:44:11 [Note] Event Scheduler: Purging the queue. 0 events
120223 16:44:13 [Warning] /home/michael/mysqlc/bin/mysqld: Forcing close of thread 2  user: 'michael'

120223 16:44:13 [Note] Stopping Cluster Utility thread
120223 16:44:13 [Note] Stopping Cluster Index Stats thread
120223 16:44:13 [Note] Stopping Cluster Binlog
120223 16:44:13 [Note] Stopping Cluster Index Statistics thread
120223 16:44:14  InnoDB: Starting shutdown...
120223 16:44:15  InnoDB: Shutdown completed; log sequence number 1595675
120223 16:44:15 [Note] /home/michael/mysqlc/bin/mysqld: Shutdown complete

7. 總結

1. 有序啟動：Management Node，Data Nodes，MySQL Server
2. 配置項與各節點的對應
3. 每個結點都單獨啟動
4. Management Node 提供狀態查看等多種功能

轉載請注明來自柳大·Poechant的CSDN博客：http://blog.CSDN.net/Poechant