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至少需要三個節點
node1 192.168.150.137 node2 192.168.150.138 node3 192.168.150.139
mariadb版本為mariadb的支持galera cluster的分支版本
MariaDB-Galera-server-5.5.46
實驗前準備:
1、HA環境首要條件:時間同步 三個節點添加對時腳本 [root@localhost ~]# crontab -l */5 * * * * /usr/sbin/ntpdate 1.cn.pool.ntp.org 2、三個幾點均配置MariaDB-Galera的本地yum倉庫,我嘗試使用mariadb官方提供的yum倉庫,天朝的網會氣死你 [root@localhost ~]# cat /etc/yum.repos.d/galera.repo [galera] name=galera baseurl=file:///root/galera_cluster gpgcheck=0 enable=1 3、yum安裝,僅需安裝MariaDB-Galera-server,其余的均會依賴安裝 yum -y install Mariadb-Galera-server
1、查看galera所需調用的庫的位置 rpm -ql galera | grep -i smm.so /usr/lib64/galera/libgalera_smm.so 2、修改配置文件,三節點同步修改 [root@localhost yum.repos.d]# cat /etc/my.cnf.d/server.cnf # # These groups are read by MariaDB server. # Use it for options that only the server (but not clients) should see # # See the examples of server my.cnf files in /usr/share/mysql/ # # this is read by the standalone daemon and embedded servers [server] # this is only for the mysqld standalone daemon [mysqld] # # * Galera-related settings # [galera] # Mandatory settings wsrep_provider=/usr/lib64/galera/libgalera_smm.so wsrep_cluster_address="gcomm://192.168.150.137,192.168.150.138,192.168.150.139" binlog_format=row default_storage_engine=InnoDB innodb_autoinc_lock_mode=2 bind-address=0.0.0.0 wsrep_cluster_name='mycluster' # # Optional setting #wsrep_slave_threads=1 #innodb_flush_log_at_trx_commit=0 # this is only for embedded server [embedded] # This group is only read by MariaDB-5.5 servers. # If you use the same .cnf file for MariaDB of different versions, # use this group for options that older servers don't understand [mysqld-5.5] # These two groups are only read by MariaDB servers, not by MySQL. # If you use the same .cnf file for MySQL and MariaDB, # you can put MariaDB-only options here [mariadb] [mariadb-5.5] 3、節點1進行mysql及cluster開啟 [root@localhost ~]# /etc/rc.d/init.d/mysql start --wsrep-new-cluster Starting MySQL.... SUCCESS! 4、其它兩個節點進行正常的mysql開啟 [root@localhost ~]# service mysql start Starting MySQL....SST in progress, setting sleep higher. SUCCESS! 此時已配置完成。。。。。。
1、節點1創建數據庫,節點2 3均可正常查看 節點1:[root@localhost ~]# mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 4 Server version: 5.5.46-MariaDB-wsrep MariaDB Server, wsrep_25.12.r4f81026 Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> CREATE DATABASE mydb; Query OK, 1 row affected (0.00 sec) MariaDB [(none)]> SHOW DATABASES; +--------------------+ | Database | +--------------------+ | information_schema | | mydb | | mysql | | performance_schema | | test | +--------------------+ 節點2 3: [root@localhost ~]# mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 4 Server version: 5.5.46-MariaDB-wsrep MariaDB Server, wsrep_25.12.r4f81026 Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> SHOW DATABASES; +--------------------+ | Database | +--------------------+ | information_schema | | mydb | | mysql | | performance_schema | | test | +--------------------+ 5 rows in set (0.01 sec) 2、節點2數據庫中創建表,節點1 2均可正常查看 節點2: MariaDB [(none)]> use mydb; Database changed MariaDB [mydb]> CREATE TABLE tb1 (id int,name char(10)); Query OK, 0 rows affected (0.01 sec) 節點1 3: MariaDB [(none)]> use mydb 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 MariaDB [mydb]> SHOW TABLES -> ; +----------------+ | Tables_in_mydb | +----------------+ | tb1 | +----------------+ 1 row in set (0.00 sec) MariaDB [mydb]> DESC tb1; +-------+----------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+----------+------+-----+---------+-------+ | id | int(11) | YES | | NULL | | | name | char(10) | YES | | NULL | | +-------+----------+------+-----+---------+-------+ 2 rows in set (0.02 sec) 3、自增欄位的測試,每個幾點會跳著進行自增,同時插入時例如1節點1 4 7;2節點2 5 8;三節點3 6 9。 節點1: MariaDB [mydb]> CREATE TABLE tb2(id int UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY,name char(30) uery OK, 0 rows affected (0.01 sec) MariaDB [mydb]> INSERT INTO tb2 (name) VALUES ('void'),('yao'); Query OK, 2 rows affected (0.01 sec) Records: 2 Duplicates: 0 Warnings: 0 節點2: MariaDB [mydb]> select * from tb2; +----+------+ | id | name | +----+------+ | 1 | void | | 4 | yao | +----+------+ 2 rows in set (0.01 sec) MariaDB [mydb]> INSERT INTO tb2 (name) VALUES ('amy'),('apple'); Query OK, 2 rows affected (0.00 sec) Records: 2 Duplicates: 0 Warnings: 0 MariaDB [mydb]> select * from tb2; +----+-------+ | id | name | +----+-------+ | 1 | void | | 4 | yao | | 5 | amy | | 8 | apple | +----+-------+ 4 rows in set (0.00 sec)
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