MHA-mysql5.7.20

1.服务器：
192.168.9.24 Mha-master
192.168.9.25 Mha-slave
192.168.9.26 Mha-bak
2.布置开启Gtid功能mysql5.7.20并建立主从复制
2.1三台安装mysql5.7.20

#!/bin/bash
#author:pan
#切换到相应文件夹
cd 
#二进制安装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/
#添加用户
useradd -M -s /sbin/nologin mysql
#更改属主
chown -R mysql.mysql mysql
#添加路径
ln -s /usr/local/mysql/bin/* /usr/local/bin/
#删除原my.cnf
rm -f /etc/my.cnf
#创建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
#初始化数据库
mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
#设置启动项
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
#重新加载daemon
systemctl daemon-reload
systemctl enable mysqld.service
systemctl start mysqld
#启动后第一次登陆密码
#grep 'temporary password' /usr/local/mysql/log/mysql_error.log
#修改初始密码
#mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '000000';
#安装完成

2.2开启gtid功能,修改配置文件
Mha-master主机：
[mysqld]
gtid_mode = ON
log_slave_updates 增加此三行调整server-id的值
enforce_gtid_consistency

server-id=1
Mha-slave主机：
[mysqld]
read_only = 1 设置只读

gtid_mode = ON
log_slave_updates 增加此三行调整server-id的值
enforce_gtid_consistency

server-id=2

relay_log_purge = 0 禁用自动删除relay log功能

2.3配置主从
2.3.1在Mha-master上创建主从复制账号
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在两个从上进行主从同步
[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墙的问题

3.三台都做服务器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

猜你喜欢