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所属分类:Mysql
系统版本: Centos 7
mysql版本: 5.7
自带yum源版本太低,安装高版本mysql最好还是更新mysql repo源
1.查看Centos6是否安装mysql
rpm -qa | grep mysql
2.若有自带mysql,卸载Centos
rpm -e rpm包; rpm -e –nodeps 不检查依赖包直接删除 rpm -e –alimatches –nodeps rpm 删除相同名字包,并忽略依赖包 yum -y remove rpm包 若有多个依赖包依次卸载,当结果显示Complete!表示卸载完毕
3.官网下载mysql yum并安装
rpm -ivh https://repo.mysql.com//mysql57-community-release-el7.rpm
4. 查看 yum库上mysql版本信息
yum repolist enabled | grep mysql
如没有发现,需配置repo,注意如果要使用5.6或其他版本,只能有一个enabled=1,其他enable=0
5.yum安装mysql
yum install mysql-community-server -y
6.启动mysql
systemctl start mysqld; systemctl enable mysqld;
查看mysql密码
grep 'password' /var/log/mysqld.log |head -n1
7.登录mysql并设置密码
mysql -u root -p set password =password('Thege@123'); flush privileges;
或者也可用
alter user 'root'@'localhost' identified by 'Thege@123';
root密码设置成Thege@123
8.修改配置文件(仅供参考)
mv /etc/my.cnf /etc/my.cnf.bak; tee -a /etc/my.cnf <<-'EOF' [client] port = 3307 socket = /var/lib/mysql/mysql.sock [mysqld] port = 3307 socket = /var/lib/mysql/mysql.sock datadir = /var/lib/mysql character-set-server=utf8 collation-server=utf8_general_ci skip-external-locking key_buffer_size = 128M max_allowed_packet = 32M table_open_cache = 512 net_buffer_length = 8K sort_buffer_size = 2M read_buffer_size = 16M read_rnd_buffer_size = 160M myisam_sort_buffer_size = 32M thread_cache_size = 64 query_cache_size= 64M tmp_table_size = 64M max_connections = 5000 max_user_connections = 5000 max_connect_errors = 6000 wait_timeout = 30 interactive_timeout = 30 long_query_time = 1 log-bin=mysql-bin binlog_format=mixed server-id = 1 expire_logs_days = 10 early-plugin-load = "" open_files_limit = 3000 log_slave_updates = 1 default_storage_engine = InnoDB innodb_file_per_table = 1 innodb_data_home_dir = /var/lib/mysql innodb_data_file_path = ibdata1:10M:autoextend innodb_log_group_home_dir = /var/lib/mysql innodb_buffer_pool_size = 512M innodb_log_file_size = 128M innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 1 innodb_lock_wait_timeout = 50 sync_binlog = 1 [mysqldump] quick max_allowed_packet = 32M [mysql] no-auto-rehash [myisamchk] key_buffer_size = 128M sort_buffer_size = 2M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout EOF
修改后,重启服务
systemctl restart mysqld
9.添加防火墙策略
firewall-cmd --zone=public --add-port=3307/tcp --permanent;firewall-cmd --reload