Mysql 5.7 主从高可用容灾最佳实践

Mysql容灾环境规划

主机名	IP/Port	ROLE	OS Version	MySQL Version	GTID Mode	Binlog Format
Lixora	192.168.1.99/3306	master	CentOS 7.1	5.7.24	on	row
Lixora-slave	192.168.1.38/3306	slave	CentOS 7.1	5.7.24	on	row
RP-monitor	192.168.1.38	Monitor	CentOS 7.1

安装好主备库数据库软件和初始化数据库环境；

主/备库my.cnf参数配置

#主库参数配置：

log-bin = mysql_master

server-id = 8801

binlog-format = row

log-slave-updates = true

enforce-gtid-consistency = true

gtid-mode = on

sync_binlog = 1

innodb_flush_log_at_trx_commit = 1

skip_name_resolve = 0

#备库参数配置：

log-bin = mysql_slave

server-id = 8802     # server id 不能相同

binlog-format = row

log-slave-updates = true

enforce-gtid-consistency = true

gtid-mode = on

sync_binlog = 1

innodb_flush_log_at_trx_commit = 1

skip_name_resolve = 0

重启主库备库，参数生效；

主库创建复制用户创建：

grant replication slave, REPLICATION CLIENT on *.* to repl@'%' identified by '123‘;

mysqldump数据初始化

#备份主库数据到从库通过远程方式

mysqldump -uroot -pmsandbox -h 192.168.1.99 -P 5724 > /tmp/full.sql

mysqldump --all-databases --single-transaction --triggers --routines --events \

-h 192.168.1.99 -P 5724 --user=root --password=mysql >/tmp/alldb.sql

主从同步环境启用

--执行change master

CHANGE MASTER TO MASTER_HOST='192.168.1.99',MASTER_USER='repl', MASTER_PASSWORD='123', MASTER_PORT=5724, MASTER_AUTO_POSITION = 1;

备库启动日志复制

#检查slave 复制状态

show slave status \G;

##slave 端启动复制进程

start slave;

配置replication-manager主从同步管理工具

Package	Flavor	Description
replication-manager-min	Minimal	Offers essential features for the most basic usage.
replication-manager-osc	Open Source	Offers all features excepting provisioning (recommended version).
replication-manager-tst	Test	Offers OSC features and extra features for testing like local service bootstrap, benchmarking...
replication-manager-pro	Provisioning	Offers commercial, ready to go cluster provisioning solution.
replication-manager-arb	Arbitrator	Offers arbitration for replication-manager clustering.

下载地址：

http://repo.signal18.io/centos/

##yum安装方式：

1. 设置yum源

# vi /etc/yum.repos.d/signal18.repo

[signal18]

name=Signal18 repositories

baseurl=http://repo.signal18.io/centos/2.1/$releasever/$basearch/

gpgcheck=0

enabled=1

2. master 安装 yum install replication-manager-osc

yum install replication-manager-osc

##rpm 手动安装方式：

rpm -ivh replication-manager-tst-2.1.1_99_g8f175-1.x86_64.rpm

配置文件配置：

[root@lixora replication-manager]# pwd

/etc/replication-manager

[root@lixora replication-manager]# cat config.toml

[Cluster01]

title = "Cluster01"

db-servers-hosts = "192.168.1.99:5724,192.168.1.38:5724"

db-servers-prefered-master = "192.168.1.99:5724"

db-servers-credential = "repl:123"

db-servers-connect-timeout = 1

replication-credential = "repl:123"

failover-mode = "automatic"

[Default]

monitoring-datadir = "/data/replication-manager"

monitoring-sharedir = "/data/share_replication-manager"

log-level=1

log-file = "/var/log/replication-manager.log"

replication-multi-master = false

replication-multi-tier-slave = false

failover-readonly-state = true

http-server = true

http-bind-address = "0.0.0.0"

http-port = "10001"

log-sql-in-monitoring=truettp-root = "/usr/share/replication-manager/dashboard"

#启动RP manager：

/etc/init.d/replication-manager start

#设置开机启动：

systemctl enable replication-manager

#主从同步复制监控管理界面：

http://192.168.1.38:10001/