1.下载tar.gz格式的安装包
下载地址https://dev.mysql.com/downloads/mysql/
2.解压
tar -zvxf mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz
mv mysql-5.7.19-linux-glibc2.12-x86_64 mysql5719
mv mysql5719 /mysql
chown -R mysql:mysql /mysql/mysql5719
3.配置my.cnf
master节点配置，进入到/mysql/mysql5719目录下面，创建文件my.cnf,文件内容如下
[mysqld]
datadir=/mysql/mysql5719/data
socket=/mysql/mysql5719/data/mysql.sock
tmpdir = /tmp
user=mysql
basedir = /mysql/mysql5719
log-bin = master-bin
log-bin-index = master-bin.index
server-id = 1
# Disabling symbolic-links is recommended to prevent assorted security risks
#symbolic-links=0
#key_buffer = 16M
key_buffer_size = 32M
max_allowed_packet = 16M
thread_stack = 128K
thread_cache_size = 64
query_cache_limit = 8M
query_cache_size = 64M
query_cache_type = 1
# Important: see Distributing the Databases and Setting max_connections
max_connections = 3000
binlog_format=mixed
log_bin_trust_function_creators = 1
## @!!@
lower_case_table_names = 1
#default-storage-engine=InnoDB
#character_set_client=utf8
#default-collation=utf8_unicode_ci
character-set-server=utf8
collation-server=utf8_unicode_ci
read_buffer_size = 2M
read_rnd_buffer_size = 16M
sort_buffer_size = 8M
join_buffer_size = 8M
lower_case_table_names = 1
# InnoDB settings
innodb_data_home_dir=/mysql/mysql5719/data
innodb_file_per_table = 1
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 64M
innodb_buffer_pool_size = 2G
innodb_thread_concurrency = 8
innodb_flush_method = O_DIRECT
innodb_log_file_size = 512M
#skip-grant-tables
#sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
slave节点配置，进入到/mysql/mysql5719目录下面，创建文件my.cnf,文件内容如下
[mysqld]
datadir=/mysql/mysql5719/data
socket=/mysql/mysql5719/data/mysql.sock
user=mysql
port = 3306
basedir =/mysql/mysql5719
tmpdir =/tmp
relay-log = slave-relay-bin
relay-log-index = slave-relay-bin.index
server-id = 2
# Disabling symbolic-links is recommended to prevent assorted security risks
#symbolic-links=0
#key_buffer = 16M
key_buffer_size = 32M
max_allowed_packet = 16M
thread_stack = 128K
thread_cache_size = 64
query_cache_limit = 8M
query_cache_size = 64M
query_cache_type = 1
# Important: see Distributing the Databases and Setting max_connections
max_connections = 3000
binlog_format=mixed
log_bin_trust_function_creators = 1
## @!!@
lower_case_table_names = 1
#default-storage-engine=InnoDB
#character_set_client=utf8
#default-collation=utf8_unicode_ci
character-set-server=utf8
collation-server=utf8_unicode_ci
read_buffer_size = 2M
read_rnd_buffer_size = 16M
sort_buffer_size = 8M
join_buffer_size = 8M
lower_case_table_names = 1
# InnoDB settings
innodb_data_home_dir=/mysql/mysql5719/data
innodb_file_per_table = 1
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 64M
innodb_buffer_pool_size = 2G
innodb_thread_concurrency = 8
innodb_flush_method = O_DIRECT
innodb_log_file_size = 512M
#skip-grant-tables
#sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
4.创建数据目录
mkdir /mysql/mysql5719/data
5.修改mysql服务启动脚本
6.初始化数据库（root操作）
./bin/mysqld --defaults-file=./my.cnf --initialize 
上图红框里面就是root的初始密码
7.启动MySQL服务（root操作）
8.设置mysql.sock
ln -s /mysql/mysql5721/data/mysql.sock /tmp/mysql.sock 
9.设置root密码（初始密码在初始化数据库的时候生成）
set password for root@localhost = password('Zaq1@wsx'); 
10.设置MySQL服务
cp mysql.server /etc/init.d/mysqld
chmod 755 /etc/init.d/mysqld
如果出现下面的报错 
原因：MySQL默认的日志：/var/log/mysqld.log被占用了，删除即可。 
11.设置MySQL客户端
mv /usr/bin/mysql /usr/bin/mysql.bak #删除备份旧的mysql命令，若不存在可忽略
cp mysql /usr/bin/
chmod 755 /usr/bin/mysql
到此为止，master机器的安装配置完成，接下来安装slave机器，slave机器的安装和master类似，但请注意my.cnf配置不一样
12.在master上添加主从同步用户
GRANT REPLICATION SLAVE ON *.* TO 'rep_user'@'%' IDENTIFIED BY 'Qwer1@#$'; 
查看主服务器，出现以下类似信息 mysql> show master status; 
13.配置slave服务器
mysql -u root -p #进入MySQL控制台
stop slave; #停止slave同步进程
change master to master_host='134.176.72.82',master_user='rep_user',master_password='Qwer1@#$',master_log_file='master-bin.000002' ,master_log_pos=837; #执行同步语句
start slave; #开启slave同步进程
SHOW SLAVE STATUS\G #查看slave同步信息，出现以下内容
/images2018.cnblogs.com/blog/1394203/201807/1394203-20180721175143436-265635643.png) 注意查看： Slave_IO_Running: Yes Slave_SQL_Running: Yes 以上这两个参数的值为Yes，即说明配置成功！
14.测试MySQL主从服务器双机热备是否成功
（1）进入MySQL主服务器
mysql -u root -p #进入主服务器MySQL控制台
mysql> create database test;
mysql> use test; #进入数据库
mysql> CREATE TABLE test ( id int not null primary key,name char(20) ); #创建test表
mysql> insert into test values(001,'zhangsan');
mysql> insert into test values(002,'lisi');
（2）进入MySQL从服务器
mysql -u root -p #进入MySQL控制台
use test; #进入数据库
show tables; #查看mstest库，会看到有一个新建的表test，表示数据库同步成功
select * from test;
