现代Java服务端开发核心技术之CentOS7.5安装MySQL5.7
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现代Java服务端开发核心技术之CentOS7.5安装mysql5.7
1.首先检查系统中是否已经安装过MySQL,以下提供两种方式
[[email protected] Downloads]# yum list installed |grep mysql
[[email protected] Downloads]# rpm -qa|grep mysql
如果已经安装过,可以使用如下命令删除
[[email protected] Downloads]# yum -y remove
2.下载MySQL
[[email protected] Downloads]# wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz
3.解压缩并复制到/usr/local/mysql目录下
[[email protected] Downloads]# tar -xvf mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz
[[email protected] Downloads]# mv mysql-5.7.24-linux-glibc2.12-x86_64 /usr/local/mysql
4.创建数据仓库目录
[[email protected] Downloads]# mkdir -p /data/mysql
5.新建mysql用户、组和目录
[[email protected] Downloads]# groupadd mysql
[[email protected] Downloads]# useradd -r -s /sbin/nologin -g mysql mysql -d /usr/local/mysql/
6.改变目录所有者
[[email protected] Downloads]# cd /usr/local/mysql/
[[email protected] mysql]# chown -R mysql .
[[email protected] mysql]# chgrp -R mysql .
[[email protected] mysql]# chown -R mysql /data/mysql
7.配置参数
[[email protected] mysql]# bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql
2018-10-27T03:09:02.164480Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2018-10-27T03:09:02.764905Z 0 [Warning] InnoDB: New log files created, LSN=45790
2018-10-27T03:09:02.852039Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2018-10-27T03:09:02.923109Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: a8263578-d995-11e8-a863-000c29be37a9.
2018-10-27T03:09:02.924734Z 0 [Warning] Gtid table is not ready to be used. Table ‘mysql.gtid_executed‘ cannot be opened.
2018-10-27T03:09:02.925516Z 1 [Note] A temporary password is generated for [email protected]: <Xdfhi4Wvy6(
此处需要注意生成的临时密码 ,如上问结尾处的<Xdfhi4Wvy6(
[[email protected] mysql]# bin/mysql_ssl_rsa_setup --datadir=/data/mysql
- 修改系统配置文件
[[email protected] mysql]# cd /usr/local/mysql/support-files/
[[email protected] support-files]# cp mysql.server /etc/init.d/mysql
[[email protected] support-files]# vim /etc/init.d/mysql
修改以下内容
basedir=/usr/local/mysql
datadir=/data/mysql
9.启动MySQL
[[email protected] support-files]# /etc/init.d/mysql start
Starting MySQL.Logging to ‘/data/mysql/ittimeline.net.err‘.
SUCCESS!
10.登录MySQL
[[email protected] support-files]# mysql -h127.0.0.1 -uroot -p
bash: mysql: command not found...
#创建一个软连接
[[email protected] support-files]# ln -s /usr/local/mysql/bin/mysql /usr/bin
#再次登录MySQL,输入之前的临时密码
[[email protected] support-files]# mysql -h127.0.0.1 -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 3
Server version: 5.7.24
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type ‘help;‘ or ‘h‘ for help. Type ‘c‘ to clear the current input statement.
mysql>
11.MySQL设置
由于MySQL的初始化随机密码不太容易记住,因此这里需要修改生成的随机密码,在登录MySQL后使用如下命令修改,即root用户的密码为root
mysql> set password=password(‘root‘);
通常情况下都是通过MySQL客户端(例如Navicat)来远程连接MySQL服务端,这里修改root账户的host地址,用来实现远程连接
mysql> grant all privileges on *.* to ‘root‘@‘%‘ identified by ‘root‘;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
查看mysql数据库的user表的host信息,当root的host值为%则可以实现远程链接
mysql> use mysql; ##切换到mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> select host,user from user; ##查看user信息
+-----------+---------------+
| host | user |
+-----------+---------------+
| % | root |
| localhost | mysql.session |
| localhost | mysql.sys |
| localhost | root |
+-----------+---------------+
4 rows in set (0.00 sec)
12.远程登录MySQL
首先使用ifconfig命令查看MySQL所在的centOS服务的IP地址
[[email protected] ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.105 netmask 255.255.255.0 broadcast 192.168.0.255
inet6 fe80::20c:29ff:febe:37a9 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:be:37:a9 txqueuelen 1000 (Ethernet)
RX packets 1412887 bytes 2058226957 (1.9 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 276749 bytes 22287862 (21.2 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
然后检测防火墙的状态
systemctrl status firewalld 命令显示当前防火墙正在运行,如下所示
[[email protected] ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: active (running) since Fri 2018-10-26 20:42:21 PDT; 24s ago
Docs: man:firewalld(1)
Main PID: 9444 (firewalld)
Tasks: 2
CGroup: /system.slice/firewalld.service
└─9444 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid
此时我们需要使用 systemctl stop firewalld关闭防火墙
[[email protected] ~]# systemctl stop firewalld
或者使用如下命令让防火墙放行3306端口
[[email protected] ~]# firewall-cmd --zone=public --add-port=3306/tcp --permanent
success
[[email protected] ~]# service firewalld restart
Redirecting to /bin/systemctl restart firewalld.service
然后使用Navicat客户端登录MySQL服务,如下图所示
使用Navicat查看远程MySQL服务的user表信息
13 MySQL开机启动
[[email protected] bin]# chmod 755 /etc/init.d/mysql
[[email protected] bin]# chkconfig --add mysql
[[email protected] bin]# chkconfig --level 345 mysql on
检测是否开机启动成功
[[email protected] bin]# reboot #重启系统
[[email protected] ~]# ps -ef|grep mysql #使用ps命令查看MySQL进程信息
root 1052 1 0 21:10 ? 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/data/mysql --pid-file=/data/mysql/ittimeline.net.pid
mysql 1242 1052 1 21:10 ? 00:00:00 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=ittimeline.net.err --pid-file=/data/mysql/ittimeline.net.pid
root 1902 1855 0 21:11 pts/0 00:00:00 grep --color=auto mysql
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