一、进入MySQL的官方网站
https://dev.mysql.com/downloads/mysql/
wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.36-el7-x86_64.tar.gz
查看本地是否安装了mysql
rpm -qa | grep mysql
然后卸载
rpm -e bt-mysql56-5.6.50-1.el7.x86_64
解压文件
tar -zxvf mysql-5.7.36-el7-x86_64.tar.gz  -C /usr/local/

二、新建MySQL运行的系统用户
 useradd -r -s /sbin/nologin -g mysql mysql -d /usr/local/mysql-5.7

chown -R mysql /usr/local/mysql-5.7
chgrp -R mysql /usr/local/mysql-5.7

三、配置
配置参数
/usr/local/mysql-5.7/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql-5.7 --datadir=/usr/local/mysql-5.7/data

执行完后注意记住临时密码：vo9oPrx>zjw/

/usr/local/mysql-5.7/bin/mysql_ssl_rsa_setup  --datadir=/usr/local/mysql-5.7/data

配置启动文件
由于5.7后就不在提供默认的配置文件了，所在在/etc/my.cnf文件中增加


[client]
#password    = your_password
port        = 3306
socket        = /tmp/mysql.sock

[mysqld]
port        = 3306
socket        = /tmp/mysql.sock
datadir =/usr/local/mysql-5.7/data
default_storage_engine = InnoDB
performance_schema_max_table_instances = 400
table_definition_cache = 400
skip-external-locking
key_buffer_size = 32M
max_allowed_packet = 100G
table_open_cache = 128
sort_buffer_size = 768K
net_buffer_length = 4K
read_buffer_size = 768K
read_rnd_buffer_size = 256K
myisam_sort_buffer_size = 8M
thread_cache_size = 16
query_cache_size = 16M
tmp_table_size = 32M
sql-mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

explicit_defaults_for_timestamp = true
#skip-name-resolve
max_connections = 500
max_connect_errors = 100
open_files_limit = 65535
server-id = 1
log-bin=mysql-bin
#binlog-do-db=sleep
binlog_format=mixed
expire_logs_days = 10
slow_query_log=1
slow-query-log-file=/usr/local/mysql-5.7/data/mysql-slow.log
long_query_time=3
#log_queries_not_using_indexes=on
early-plugin-load = ""


innodb_data_home_dir = /usr/local/mysql-5.7/data
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /usr/local/mysql-5.7/data
innodb_buffer_pool_size = 128M
innodb_log_file_size = 64M
innodb_log_buffer_size = 16M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50
innodb_max_dirty_pages_pct = 90
innodb_read_io_threads = 2
innodb_write_io_threads = 2

[mysqldump]
quick
max_allowed_packet = 500M

[mysql]
no-auto-rehash

[myisamchk]
key_buffer_size = 32M
sort_buffer_size = 768K
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

拷贝文件
cp  /usr/local/mysql-5.7/support-files/mysql.server  /etc/init.d/mysql
启动
/etc/init.d/mysql start


注意修改：
 /usr/local/mysql-5.7/support-files/mysql.server文件中的
basedir 和datadir


可以 配置MySQL启动
chmod 755 /etc/init.d/mysql
# chkconfig --add mysql
# chkconfig --level 345 mysql on

 

 


四、MySQL客户端连接 然后修改密码

set password for root@localhost = password('123456');