MHA-mysql5.7.20
192.168.9.24 Mha-master
192.168.9.25 Mha-slave
192.168.9.26 Mha-bak
2.布置開啟Gtid功能mysql5.7.20並建立主從復制
2.1三臺安裝mysql5.7.20
#!/bin/bash #author:pan #切換到相應文件夾 cd #二進制安裝mysql5.7.20 tar xvf mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz -C /usr/local cd /usr/local/ mv mysql-5.7.20-linux-glibc2.12-x86_64/ mysql cd /usr/local/mysql/ mkdir -p data log binlogs run cd /usr/local/ #添加用戶 useradd -M -s /sbin/nologin mysql #更改屬主 chown -R mysql.mysql mysql #添加路徑 ln -s /usr/local/mysql/bin/* /usr/local/bin/ #刪除原my.cnf rm -f /etc/my.cnf #創建my.cnf cat > /etc/my.cnf << EOF [client] port = 3306 socket = /usr/local/mysql/run/mysql.sock [mysqld] port = 3306 socket = /usr/local/mysql/run/mysql.sock pid_file = /usr/local/mysql/run/mysql.pid datadir = /usr/local/mysql/data default_storage_engine = InnoDB max_allowed_packet = 512M max_connections = 2048 open_files_limit = 65535 skip-name-resolve lower_case_table_names=1 character-set-server = utf8mb4 collation-server = utf8mb4_unicode_ci init_connect=‘SET NAMES utf8mb4‘ innodb_buffer_pool_size = 1024M innodb_log_file_size = 2048M innodb_file_per_table = 1 innodb_flush_log_at_trx_commit = 0 key_buffer_size = 64M log-error = /usr/local/mysql/log/mysql_error.log log-bin = /usr/local/mysql/binlogs/mysql-bin slow_query_log = 1 slow_query_log_file = /usr/local/mysql/log/mysql_slow_query.log long_query_time = 5 tmp_table_size = 32M max_heap_table_size = 32M query_cache_type = 0 query_cache_size = 0 server-id=1 EOF #初始化數據庫 mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data #設置啟動項 cat > /usr/lib/systemd/system/mysqld.service << EOF [Unit] Description=MySQL Server Documentation=man:mysqld(8) Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html After=network.target After=syslog.target [Install] WantedBy=multi-user.target [Service] User=mysql Group=mysql Type=forking PIDFile=/usr/local/mysql/run/mysqld.pid #Disable service start and stop timeout logic of systemd for mysqld service. TimeoutSec=0 #Execute pre and post scripts as root PermissionsStartOnly=true #Needed to create system tables #ExecStartPre=/usr/bin/mysqld_pre_systemd #Start main service ExecStart=/usr/local/mysql/bin/mysqld --daemonize --pid-file=/usr/local/mysql/run/mysqld.pid $MYSQLD_OPTS #Use this to switch malloc implementation EnvironmentFile=-/etc/sysconfig/mysql #Sets open_files_limit LimitNOFILE = 65535 Restart=on-failure RestartPreventExitStatus=1 PrivateTmp=false EOF #重新加載daemon systemctl daemon-reload systemctl enable mysqld.service systemctl start mysqld #啟動後第一次登陸密碼 #grep ‘temporary password‘ /usr/local/mysql/log/mysql_error.log #修改初始密碼 #mysql> ALTER USER ‘root‘@‘localhost‘ IDENTIFIED BY ‘000000‘; #安裝完成
2.2開啟gtid功能,修改配置文件
Mha-master主機：
[mysqld]
gtid_mode = ON
log_slave_updates 增加此三行調整server-id的值
enforce_gtid_consistency
server-id=1
Mha-slave主機：
[mysqld]
read_only = 1 設置只讀
gtid_mode = ON
log_slave_updates 增加此三行調整server-id的值
enforce_gtid_consistency
server-id=2
relay_log_purge = 0 禁用自動刪除relay log功能
重啟mysql，並查看
[root@Mha-master ~]# systemctl restart mysqld
[root@Mha-master ~]# mysql -uroot -p000000
mysql> show global variables like ‘%gtid%‘;
+----------------------------------+-------+
| Variable_name | Value |
+----------------------------------+-------+
| enforce_gtid_consistency | ON |
| gtid_executed | |
| gtid_executed_compression_period | 1000 |
| gtid_mode | ON |
| gtid_owned | |
| gtid_purged | |
| session_track_gtids | OFF |
+----------------------------------+-------+
8 rows in set (0.00 sec)
2.3配置主從
2.3.1在Mha-master上創建主從復制賬號
mysql> grant replication slave on . to rep@‘192.168.9.%‘ identified by ‘000000‘;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> show grants for rep@‘192.168.9.%‘ ;
+-------------------------------------------------------+
| Grants for [email protected].% |
+-------------------------------------------------------+
| GRANT REPLICATION SLAVE ON . TO ‘rep‘@‘192.168.9.%‘ |
+-------------------------------------------------------+
1 row in set (0.00 sec)
2.3.2在兩個從上進行主從同步
[root@Mha-slave ~]# mysql -uroot -p000000
mysql> change master to master_host=‘192.168.9.24‘,master_user=‘rep‘,master_password=‘000000‘,master_auto_position=1;
Query OK, 0 rows affected, 2 warnings (0.01 sec)
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
mysql> show slave status\G;
查看是否成功，如果不成功查看是否是防火墻的問題
3.三臺都做服務器ssh
[root@Mha-master ~]# ssh-keygen -t rsa -P "" -f ~/.ssh/id_rsa
[root@Mha-master ~]# sshpass -p 102110504 ssh-copy-id -i ~/.ssh/id_rsa.pub -o StrictHostKeyChecking=no [email protected]
4.部署MHA
MHA-mysql5.7.20