IP规划 角色 IP地址 主机名 Master 数据库服务器 192.168.4.51 master51 备用 1 master 数据库服务器 192.168.4.52 master52 备用 2 master 数据库服务器 192.168.4.53 master53 第 1 台 slave 服务器 192.168.4.54 slave54 第 2 台 slave 服务器 192.168.4.55 slave55 Mha_manager 服务器 192.168.4.56 mgm56 VIP 地址 192.168.4.100
一、配置所有数据节点主机之间可以互相以ssh密钥对方式认证登陆 二、配置manager56主机 无密码ssh登录 所有数据节点主机 三、配置主从同步,要求如下: 51 主库 开半同步复制 52 从库(备用主库) 开半同步复制 53 从库(备用主库) 开半同步复制 54 从库 不做备用主库所以不用开半同步复制 55 从库 不做备用主库所以不用开半同步复制
3.1、master51配置: vim /etc/my.cnf [mysqld] plugin-load = "rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so" rpl-semi-sync-master-enabled = 1 rpl-semi-sync-slave-enabled = 1
server_id=51 log-bin=master51 binlog-format="mixed" :wq
[root@host51~]# systemctl restart mysqld
[root@host51 ~]# ls /var/lib/mysql/master51.* /var/lib/mysql/master51.000001 /var/lib/mysql/master51.index
[root@host51 ~]# mysql -uroot -p123456 mysql> grant replication slave on . to repluser@"%" identified by "123456"; Query OK, 0 rows affected, 1 warning (10.04 sec)
mysql> set global relay_log_purge=off; Query OK, 0 rows affected (0.15 sec)
mysql> show master status; +-----------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +-----------------+----------+--------------+------------------+-------------------+ | master51.000001 | 441 | | | | +-----------------+----------+--------------+------------------+-------------------+ mysql> quit;
3.2、备用master52的配置 vim /etc/my.cnf [mysqld] plugin-load = "rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so" rpl-semi-sync-master-enabled = 1 rpl-semi-sync-slave-enabled = 1
server_id=52 log-bin=master52 binlog-format="mixed"
]# systemctl restart mysqld [root@host52~]# ls /var/lib/mysql/master52.* /var/lib/mysql/master52.000001 /var/lib/mysql/master52.index
[root@host52 ~]# mysql -uroot -p123456
mysql> set global relay_log_purge=off; Query OK, 0 rows affected (0.13 sec)
mysql> change master to -> master_host="192.168.4.51", -> master_user="repluser", -> master_password="123456", -> master_log_file="master51.000001", -> master_log_pos=441; Query OK, 0 rows affected, 2 warnings (0.04 sec)
mysql> start slave; Query OK, 0 rows affected (0.01 sec)
[root@host52 ~]# mysql -uroot -p123456 -e "show slave status\G" | grep -i YES mysql: [Warning] Using a password on the command line interface can be insecure. Slave_IO_Running: Yes Slave_SQL_Running: Yes [root@host52 ~]#
3.3、备用master53的配置 ]# vim /etc/my.cnf [mysqld] plugin-load = "rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so" rpl-semi-sync-master-enabled = 1 rpl-semi-sync-slave-enabled = 1
server_id=53 log-bin=master53 binlog-format="mixed" :wq
[root@host53 ~]# systemctl restart mysqld [root@host53 ~]# ls /var/lib/mysql/master53.* /var/lib/mysql/master53.000001 /var/lib/mysql/master53.index [root@host53 ~]#
[root@host53 ~]# mysql -uroot -p123456 mysql> set global relay_log_purge=off; Query OK, 0 rows affected (0.14 sec)
mysql> change master to master_host="192.168.36.51",master_user="repluser",master_password="123456",master_log_file="master51.000001",master_log_pos=441; Query OK, 0 rows affected, 2 warnings (0.05 sec)
mysql> start slave; Query OK, 0 rows affected (0.00 sec)
mysql>
[root@host53 ~]# mysql -uroot -p123456 -e "show slave status\G" | grep -i yes mysql: [Warning] Using a password on the command line interface can be insecure. Slave_IO_Running: Yes Slave_SQL_Running: Yes
3.4、配置从服务器54 [root@host54 ~]# vim /etc/my.cnf [mysqld] server_id=54 :wq
[root@host54~]# systemctl restart mysqld [root@host54 ~]# mysql -uroot -p123456 mysql> change master to master_host="192.168.36.51",master_user="repluser",master_password="123456",master_log_file="master51.000001",master_log_pos=441; Query OK, 0 rows affected, 2 warnings (0.09 sec)
mysql> start slave; Query OK, 0 rows affected (0.00 sec)
mysql> quit; Bye [root@host54 ~]# [root@host54 ~]# mysql -uroot -p123456 -e "show slave status\G" | grep -i yes mysql: [Warning] Using a password on the command line interface can be insecure. Slave_IO_Running: Yes Slave_SQL_Running: Yes
3.5、配置从服务器55 [root@host55 ~]# vim /etc/my.cnf [mysqld] server_id=55 :wq
[root@db111 ~]# systemctl restart mysqld [root@db111 ~]# mysql -uroot -p123456 mysql> change master to master_host="192.168.36.51",master_user="repluser",master_password="123456",master_log_file="master51.000001",master_log_pos=441; Query OK, 0 rows affected, 2 warnings (0.09 sec)
mysql> start slave; Query OK, 0 rows affected (0.00 sec)
mysql> quit; Bye [root@host55 ~]# [root@host55 ~]# mysql -uroot -p123456 -e "show slave status\G" | grep -i yes mysql: [Warning] Using a password on the command line interface can be insecure. Slave_IO_Running: Yes Slave_SQL_Running: Yes [root@host55~]#
3.6、在客户端测试主从同步配置 3.6.1 在主库51上添加访问数据的授权用户 [root@host51~]# mysql -uroot -p123456 mysql> grant all on gamedb.* to admin@"%" identified by "123456";
3.6.2 在客户端主机连接主库51 建库表记录 mysql> create database gamedb; Query OK, 1 row affected (0.01 sec)
mysql> create table gamedb.t1 (id int); Query OK, 0 rows affected (0.04 sec)
mysql> insert into gamedb.t1 values(999); Query OK, 1 row affected (0.15 sec)
mysql> insert into gamedb.t1 values(999); Query OK, 1 row affected (0.05 sec)
mysql> select * from gamedb.t1; +------+ | id | +------+ | 999 | | 999 | +------+ 2 rows in set (0.00 sec)
mysql>
3.6.3 在客户端使用授权用户连接从库52-55,也能看到同样的库表及记录
#mysql -h从库IP地址 -uadmin -p123456 mysql> select * from gamedb.t1; +------+ | id | +------+ | 999 | | 999 | +------+ 4.0.1下来我们配置代理服务器 配置MHA集群 安装软件包: 在所有主机上安装perl软件包 (51~56) 在所有主机上安装mha_node软件包 (51~56) 只在管理主机上安装mha_manager软件包(56) 检查配置环境 拷贝命令(56) 创建工作目录 和主配置文件 (56) 创建故障切换脚本(56) 编辑主配置文件 app1.cnf 验证配置 验证ssh 免密码登录 数据节点主机 验证 数据节点的主从同步配置
编辑管理主机主配置文件 ]# cp mha4mysql-manager-0.56/bin/* /usr/local/bin/ ]#mkdir /etc/mha_manager/ [root@host56 mha4mysql-manager-0.56]# cp samples/conf/app1.cnf /etc/mha_manager/ ]#vim /etc/mha_manager/app1.cnf
[server default] manager_workdir=/etc/mha_manager manager_log=/etc/mha_manager/manager.log master_ip_failover_script=/usr/local/bin/master_ip_failover
(
[root@host56 ~]# cd mha4mysql-manager-0.56/samples/scripts/
[root@host56 scripts]# ls
master_ip_failover master_ip_online_change power_manager send_report
[root@host56 scripts]# cp master_ip_failover /usr/local/bin/
]# vim /usr/local/bin/master_ip_failover
my $vip = '192.168.4.100/24'; # Virtual IP
my $key = "1";
my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down";
:wq
) 修改脚本文件
ssh_user=root ssh_port=22
repl_user=repluser repl_password=123456
user=root password=123456
[server1] hostname=192.168.36.51 port=3306 candidate_master=1
[server2] hostname=192.168.36.52 port=3306 candidate_master=1
[server3] hostname=192.168.36.53 port=3306 candidate_master=1
[server4] hostname=192.168.36.54 port=3306 no_master=1
[server5] hostname=192.168.36.55 port=3306 no_master=1 :wq
测试SSH
[root@host56 ~]# masterha_check_ssh --conf /etc/mha_manager/app1.cnf All SSH connection tests passed successfully.
测试主从同步 [root@host56 mhasoft]# masterha_check_repl --conf /etc/mha_manager/app1.cnf
启动管理服务,并查看服务状态 ]# masterha_manager --conf=/etc/mha_manager/app1.cnf --ignore_last_failover
另开终端 在管理主机上查看服务状态 [root@host56 ~]# masterha_check_status --conf=/etc/mha_manager/app1.cnf
把51 宕掉后 看看 是不是52 是不是主库 但是 51 好了需手动配置成 52 的从