一、实验环境
1、两台机器
- MasterA：192.168.200.114
- MasterB：192.168.200.115
2、实现思路
实现Mysql主主复制
二、安装mariadb
1、第一台
[root@masterA ~]# yum -y install mariadb mariadb-server [root@masterA ~]# vim /etc/my.cnf [mysqld] server-id= 1 //标记ID log-bin=mysql-binlog //开启二进制日志 log-slave-updates=true //将复制事件写入binlog，一台服务器既做主库又做从库此选项必须要开启 max_binlog_size=1024M //masterA自增长ID auto_increment_offset=1 auto_increment_increment=2 //奇数ID replicate-ignore-db = information_schema replicate-ignore-db = performance_schema replicate-ignore-db = test replicate-ignore-db = mysql max_connections=3000 max_connect_errors=30 skip-character-set-client-handshake init-connect='SET NAMES utf8' character-set-server=utf8 wait_timeout=1800 interactive_timeout=1800 sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES relay-log=relay-log-bin relay-log-index=slave-relay-bin.index [root@masterA ~]# systemctl start mariadb [root@masterA ~]# mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 2 Server version: 5.5.64-MariaDB MariaDB Server Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> grant replication slave on *.* to 'repl'@'192.168.200.115' identified by '123123'; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> flush privileges; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> show master status; +---------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +---------------------+----------+--------------+------------------+ | mysql-binlog.000001 | 245 | | | +---------------------+----------+--------------+------------------+ 1 row in set (0.00 sec)
2、第二台
[root@masterB ~]# yum -y install mariadb mariadb-server [root@masterB ~]# vim /etc/my.cnf [mysqld] server-id = 2 log-bin=mysql-binlog log-slave-updates=true max_binlog_size=1024M auto_increment_offset = 2 auto_increment_increment = 2 #偶数ID replicate-ignore-db = information_schema replicate-ignore-db = performance_schema replicate-ignore-db = test replicate-ignore-db = mysql max_connections = 3000 max_connect_errors = 30 skip-character-set-client-handshake init-connect='SET NAMES utf8' character-set-server=utf8 wait_timeout=1800 interactive_timeout=1800 sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES relay-log=relay-log-bin relay-log-index=slave-relay-bin.index [root@masterB ~]# systemctl start mariadb [root@masterB ~]# mysql Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 2 Server version: 5.5.64-MariaDB MariaDB Server Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> grant replication slave on *.* to 'repl'@'192.168.200.114' identified by '123123'; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> flush privileges; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> show master status; +---------------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +---------------------+----------+--------------+------------------+ | mysql-binlog.000001 | 486 | | | +---------------------+----------+--------------+------------------+ 1 row in set (0.00 sec)
三、配置两台从服务器
1、第一台
MariaDB [(none)]> stop slave; Query OK, 0 rows affected, 1 warning (0.00 sec) MariaDB [(none)]> change master to -> master_host='192.168.200.115', -> master_port=3306, -> master_user='repl', -> master_password='123123', -> master_log_file='mysql-binlog.000001', -> master_log_pos=486; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> start slave; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.200.115 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-binlog.000001 Read_Master_Log_Pos: 486 Relay_Log_File: relay-log-bin.000002 Relay_Log_Pos: 532 Relay_Master_Log_File: mysql-binlog.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB:
2、第二台
MariaDB [(none)]> stop slave; Query OK, 0 rows affected, 1 warning (0.00 sec) MariaDB [(none)]> change master to master_host='192.168.200.114', master_port=3306, master_user='repl', master_password='123123', master_log_file='mysql-binlog.000001', master_log_pos=245; Query OK, 0 rows affected (0.01 sec) MariaDB [(none)]> start slave; Query OK, 0 rows affected (0.00 sec) MariaDB [(none)]> show slave status\G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.200.114 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-binlog.000001 Read_Master_Log_Pos: 245 Relay_Log_File: relay-log-bin.000002 Relay_Log_Pos: 532 Relay_Master_Log_File: mysql-binlog.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB:
四、测试主主复制
第一台 MariaDB [(none)]> create database test01; Query OK, 1 row affected (0.00 sec) MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | test01 | +--------------------+ 5 rows in set (0.00 sec) 第二台 MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | test01 | +--------------------+ 5 rows in set (0.00 sec)
第二台 MariaDB [(none)]> create database test02; Query OK, 1 row affected (0.00 sec) MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | test01 | | test02 | +--------------------+ 6 rows in set (0.00 sec) 第一台 MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | test01 | | test02 | +--------------------+ 6 rows in set (0.00 sec)
有以上的测试结果说明主主复制成功
实现Mysql主主高可用方案
1、第一台
[root@masterA ~]# yum -y install keepalived [root@masterA ~]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { router_id LVS_MASTER-A } vrrp_script mysql { script "/opt/mysql.sh" interval 2 weight -5 } vrrp_instance VI_1 { state BACKUP interface eno16777736 virtual_router_id 51 priority 100 nopreempt //VIP宕机修复后不会转移 advert_int 1 authentication { auth_type PASS auth_pass 1111 } track_script { mysql } virtual_ipaddress { 192.168.200.254 } } [root@masterA ~]# vim /opt/mysql.sh #!/bin/bash counter=$(netstat -na|grep "LISTEN"|grep "3306"|wc -l) if [ "${counter}" -eq 0 ]; then systemctl stop keepalived fi [root@masterA ~]# chmod +x /opt/mysql.sh [root@masterA ~]# systemctl start keepalived [root@masterA ~]# ip a | grep eno16777736 2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 inet 192.168.200.114/24 brd 192.168.200.255 scope global eno16777736 inet 192.168.200.254/32 scope global eno16777736
[root@masterA ~]# tail -f /var/log/messages Oct 7 16:42:43 localhost Keepalived_vrrp[27658]: Sending gratuitous ARP on eno16777736 for 192.168.200.254 Oct 7 16:42:43 localhost Keepalived_vrrp[27658]: Sending gratuitous ARP on eno16777736 for 192.168.200.254 Oct 7 16:49:02 localhost systemd: Stopped firewalld - dynamic firewall daemon. Oct 7 17:00:47 localhost systemd: Starting Session 24 of user root. Oct 7 17:00:47 localhost systemd: Started Session 24 of user root. Oct 7 17:00:47 localhost systemd-logind: New session 24 of user root. Oct 7 17:01:01 localhost systemd: Starting Session 25 of user root. Oct 7 17:01:01 localhost systemd: Started Session 25 of user root. Oct 7 18:01:01 localhost systemd: Starting Session 26 of user root. Oct 7 18:01:01 localhost systemd: Started Session 26 of user root.
2、第二台
[root@masterB ~]# yum -y install keepalived [root@masterB ~]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { router_id LVS_MASTER-B } vrrp_script mysql { script "/opt/mysql.sh" interval 2 weight -5 } vrrp_instance VI_1 { state BACKUP interface eno16777736 virtual_router_id 51 priority 99 advert_int 1 authentication { auth_type PASS auth_pass 1111 } track_script { mysql } virtual_ipaddress { 192.168.200.254 } } [root@masterB ~]# vim /opt/mysql.sh #!/bin/bash counter=$(netstat -na|grep "LISTEN"|grep "3306"|wc -l) if [ "${counter}" -eq 0 ]; then systemctl stop keepalived fi [root@masterB ~]# chmod +x /opt/mysql.sh [root@masterB ~]# systemctl start keepalived
[root@masterB ~]# tail -f /var/log/messages Oct 16 17:27:05 localhost Keepalived_vrrp[6159]: WARNING - default user 'keepalived_script' for script execution does not exist - please create. Oct 16 17:27:05 localhost Keepalived_vrrp[6159]: SECURITY VIOLATION - scripts are being executed but script_security not enabled. Oct 16 17:27:05 localhost Keepalived_vrrp[6159]: VRRP_Instance(VI_1) removing protocol VIPs. Oct 16 17:27:05 localhost Keepalived_vrrp[6159]: Using LinkWatch kernel netlink reflector... Oct 16 17:27:05 localhost Keepalived_vrrp[6159]: VRRP_Instance(VI_1) Entering BACKUP STATE Oct 16 17:27:05 localhost Keepalived_vrrp[6159]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)] Oct 16 17:27:05 localhost Keepalived_vrrp[6159]: VRRP_Script(mysql) succeeded Oct 16 18:01:01 localhost systemd: Started Session 26 of user root. Oct 16 18:18:39 localhost systemd: Started Session 27 of user root. Oct 16 18:18:39 localhost systemd-logind: New session 27 of user root.
测试
1、第一台
#开启keepalived服务 [root@masterA ~]# systemctl start keepalived #过滤ip [root@masterA ~]# ip a | grep inet inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host inet 192.168.200.111/24 brd 192.168.200.255 scope global eno16777728 inet 192.168.200.254/32 scope global eno16777728 #关闭mysql服务 [root@masterA ~]# /usr/local/mysql/support-files/mysql.server stop Shutting down MySQL............ SUCCESS!
2、第二台
[root@masterB ~]# ip a | grep inet inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host inet 192.168.200.112/24 brd 192.168.200.255 scope global eno16777728 inet 192.168.200.254/32 scope global eno16777728