實驗系統:CentOS 6.6_x86_64mysql
實驗前提:防火牆和selinux都關閉linux
實驗說明:本實驗共有5臺主機,IP分配如拓撲sql
實驗軟件:mariadb-10.0.20 mysql-mmm-2.2.1 mysql-mmm-monitor-2.2.1 mysql-mmm-agent-2.2.1數據庫
下載地址:http://pan.baidu.com/s/1bnnYiMrvim
實驗拓撲:服務器
1、準備工做網絡
1.根據下表,將各主機名進行修改:ssh
2.修改hosts文件,添加以下內容:測試
vim /etc/hosts -------------------------------------------> 192.168.19.21 mon 192.168.19.66 db1 192.168.19.74 db2 192.168.19.76 db3 192.168.19.79 db4
3.規劃虛擬ip,列表以下:ui
2、安裝mariadb並配置
1.在db1-4上安裝:
tar xf mariadb-10.0.20-linux-x86_64.tar.gz -C /usr/local/ cd /usr/local/ ln -sv mariadb-10.0.20-linux-x86_64 mysql useradd -r mysql mkdir -pv /mydata/data chown -R mysql.mysql /mydata/data/ cd mysql/ chown -R root.mysql . scripts/mysql_install_db --user=mysql --datadir=/mydata/data/ cp support-files/my-large.cnf /etc/my.cnf cp support-files/mysql.server /etc/init.d/mysqld chkconfig --add mysqld chkconfig mysqld on
2.編輯配置文件:
db1:
vim /etc/my.cnf ---------------------------------------------> [mysqld] server-id = 1 datadir = /mydata/data log-bin = /mydata/data/mysql1-bin binlog_format = ROW relay_log = /mydata/data/relay-log auto-increment-increment = 2 auto-increment-offset = 1 sync_binlog = 1 sync_master_info = 1 sync_relay_log = 1 sync_relay_log_info = 1 max_binlog_size = 100M log_slave_updates = 1
<---------------------------------------------
service mysqld start
db2:
vim /etc/my.cnf ---------------------------------------------> [mysqld] server-id = 2 datadir = /mydata/data log-bin = /mydata/data/mysql2-bin binlog_format = ROW relay_log = /mydata/data/relay-log auto-increment-increment = 2 auto-increment-offset = 2 sync_binlog = 1 sync_master_info = 1 sync_relay_log = 1 sync_relay_log_info = 1 max_binlog_size = 100M log_slave_updates = 1 <--------------------------------------------- service mysqld start
db3:
vim /etc/my.cnf ---------------------------------------------> [mysqld] server-id = 3 datadir = /mydata/data log-bin = /mydata/data/mysql3-bin binlog_format = ROW relay_log = /mydata/data/relay-log sync_binlog = 1 sync_master_info = 1 sync_relay_log = 1 sync_relay_log_info = 1 max_binlog_size = 100M log_slave_updates = 1 <--------------------------------------------- service mysqld start
db4:
vim /etc/my.cnf ---------------------------------------------> [mysqld] server-id = 4 datadir = /mydata/data log-bin = /mydata/data/mysql4-bin binlog_format = ROW relay_log = /mydata/data/relay-log sync_binlog = 1 sync_master_info = 1 sync_relay_log = 1 sync_relay_log_info = 1 max_binlog_size = 100M log_slave_updates = 1 <--------------------------------------------- service mysqld start
3.在db1上建立用戶:
這裏須要建立三個用戶,以下表:
/usr/local/mysql/bin/mysql -------------------------------------------------> GRANT REPLICATION CLIENT ON *.* TO 'mmm_monitor'@'192.168.19.%' IDENTIFIED BY '123456'; GRANT SUPER,REPLICATION CLIENT,PROCESS ON *.* TO 'mmm_agent'@'192.168.19.%' IDENTIFIED BY '123456'; GRANT REPLICATION SLAVE ON *.* TO 'replication'@'192.168.19.%' IDENTIFIED BY '123456'
4.查看二進制日誌位置:
FLUSH TABLES WITH READ LOCK; //施加鎖 SHOW MASTER STATUS; +-------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +-------------------+----------+--------------+------------------+ | mysql1-bin.000004 | 936 | | | +-------------------+----------+--------------+------------------+
5.不要關閉這個mysql進程鏈接,避免鎖失效,咱們另起一個ssh鏈接db1服務器,進行數據庫備份:
/usr/local/mysql/bin/mysqldump --all-databases > /tmp/database-backup.sql
6.回到剛纔mysql進程,進行解鎖:
UNLOCK TABLES;
7.將database-backup.sql文件複製到其餘db節點:
scp /tmp/database-backup.sql db2:/tmp/ scp /tmp/database-backup.sql db3:/tmp/ scp /tmp/database-backup.sql db4:/tmp/
8.db2-4主機導入sql文件,並刷新權限:
/usr/local/mysql/bin/mysql < /tmp/database-backup.sql
/usr/local/mysql/bin/mysql
------------------------------------------------->
FLUSH PRIVILEGES;
3、設置複製
1.在db2-4上操做,將db1設置爲db2-4的主:
CHANGE MASTER TO MASTER_HOST='192.168.19.66',MASTER_USER='replication',MASTER_PASSWORD='123456',MASTER_LOG_FILE='mysql1-bin.000004',MASTER_LOG_POS=936; START SLAVE;
2.查看狀態:
SHOW SLAVE STATUS\G
3.查看db2的master日誌位置:
SHOW MASTER STATUS; +-------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +-------------------+----------+--------------+------------------+ | mysql2-bin.000001 | 313 | | | +-------------------+----------+--------------+------------------+
4.在db1上操做,將db2設置爲db1的主:
CHANGE MASTER TO MASTER_HOST='192.168.19.74',MASTER_USER='replication',MASTER_PASSWORD='123456',MASTER_LOG_FILE='mysql2-bin.000001',MASTER_LOG_POS=313; START SLAVE; SHOW SLAVE STATUS\G
4、安裝MMM
1.建立用戶:
useradd -s /sbin/nologin mmmd
2.在mon上安裝:
yum -y install mysql-mmm-monitor
3.在db1-4上安裝:
yum -y install mysql-mmm-agent
4.編寫配置文件,五臺主機必須一致:
vim /etc/mysql-mmm/mmm_common.conf --------------------------------------------------------> active_master_role writer <host default> cluster_interface eth0 pid_path /var/run/mysql-mmm/mmm_agentd.pid bin_path /usr/libexec/mysql-mmm/ replication_user replication //用於複製的用戶 replication_password 123456 //複製用戶的密碼 agent_user mmm_agent //用於改變模式的用戶 agent_password 123456 //改變模式用戶的密碼 </host> <host db1> ip 192.168.19.66 mode master peer db2 //須要監視的「同伴」 </host> <host db2> ip 192.168.19.74 mode master peer db1 </host> <host db3> ip 192.168.19.76 mode slave </host> <host db4> ip 192.168.19.79 mode slave </host> <role writer> hosts db1, db2 //可寫節點 ips 192.168.19.150 //寫操做使用的VIP mode exclusive //排他模式,此處資源同一時間只能分配給一個主機 </role> <role reader> hosts db1, db2, db3, db4 //可讀節點 ips 192.168.19.151, 192.168.19.152, 192.168.19.153, 192.168.19.154 //讀操做使用的VIP mode balanced //平衡模式 </role>
5.在db1-4上修改mmm_agent.conf,只須要修改db1這裏,是哪臺就改爲哪臺,這裏只給出db1的:
vim /etc/mysql-mmm/mmm_agent.conf -------------------------------------------------> include mmm_common.conf # The 'this' variable refers to this server. Proper operation requires # that 'this' server (db1 by default), as well as all other servers, have the # proper IP addresses set in mmm_common.conf. this db1 //只改這裏
6.配置mon上的mmm_mon.conf:
vim /etc/mysql-mmm/mmm_mon.conf ----------------------------------------------------> include mmm_common.conf <monitor> ip 127.0.0.1 pid_path /var/run/mysql-mmm/mmm_mond.pid bin_path /usr/libexec/mysql-mmm status_path /var/lib/mysql-mmm/mmm_mond.status ping_ips 192.168.19.50, 192.168.19.66, 192.168.19.74, 192.168.19.76, 192.168.19.79
//用於測試網絡可用性的IP地址,其中有一個地址能ping通,就表明網絡正常,不要寫入本機的ip地址 auto_set_online 60 //是否設置自動上線,若是該值大於0,抖動的主機在抖動的時間範圍事後,則設置自動上線 # The kill_host_bin does not exist by default, though the monitor will # throw a warning about it missing. See the section 5.10 "Kill Host # Functionality" in the PDF documentation. # # kill_host_bin /usr/libexec/mysql-mmm/monitor/kill_host # </monitor> <host default> monitor_user mmm_monitor //用於監控的用戶 monitor_password 123456 //監控用戶的密碼 </host> debug 0
5、啓動測試:
1.在db1-4上啓動agents:
chkconfig mysql-mmm-agent on
service mysql-mmm-agent start
2.在mon上啓動monitor:
vim /etc/default/mysql-mmm-monitor ---------------------------------------------------> ENABLED=1
<---------------------------------------------------
service mysql-mmm-monitor start
3.檢查集羣狀態:
mmm_control show
若是服務器狀態不是ONLINE,能夠用以下命令將服務器上線,例如:
mmm_control set_online db1
4.從剛纔圖片能夠看到,寫請求的VIP在db1上,全部從節點也都把db1當作主節點。下面將db1停掉:
service mysqld stop //停掉db1的mysql服務
能夠看到寫請求的VIP已經轉移到db2上了,且從節點的主都指向了db2:
5.最後開啓db三、db4的只讀:
vim /etc/my.cnf -------------------------------> [mysqld] read_only = 1
<-------------------------------
service mysqld restart
到此爲止,全部的配置都完成了。一個writer的VIP和四個reader的VIP都已經正常分配,你們能夠建立一個遠程登陸帳號進行測試,這裏就再也不給出具體的過程了。因爲時間緊迫,且經驗有限,配置過程當中可能會出現紕漏,若有發現請及時聯繫我,歡迎你們的指正,謝謝! 聯繫QQ:82800542