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时光不回头,当下最重要。

CentOS7-Minimal安装MySQL服务

CentOS7默认安装的是Mariadb而不是mysql,而Mariadb是mysql的一个分支,
安装mysql会覆盖Mariadb

一、下载MySQL官方的 Yum Repository

[root@localhost ~]# wget -i -c https://repo.mysql.com//mysql57-community-release-el7-10.noarch.rpm 
--2018-07-26 10:21:52--  https://repo.mysql.com//mysql57-community-release-el7-10.noarch.rpm
正在解析主机 repo.mysql.com (repo.mysql.com)... 104.88.152.154
正在连接 repo.mysql.com (repo.mysql.com)|104.88.152.154|:443... 已连接。
已发出 HTTP 请求,正在等待回应... 200 OK
长度:25548 (25K) [application/x-redhat-package-manager]
正在保存至: “mysql57-community-release-el7-10.noarch.rpm”
 
100%[========================================================================================>] 25,548      36.5KB/s 用时 0.7s   
 
2018-07-26 10:21:58 (36.5 KB/s) - 已保存 “mysql57-community-release-el7-10.noarch.rpm” [25548/25548])
 
-c: 没有那个文件或目录
在 -c 中找不到 URL。
FINISHED --2018-07-26 10:21:58--
Total wall clock time: 6.3s
Downloaded: 1 files, 25K in 0.7s (36.5 KB/s)
[root@localhost ~]# 

二、安装mysql57-community-release-el7-10.noarch.rpm包,安装完之后会获取mysql的yum repo源

[root@localhost ~]# yum -y install mysql57-community-release-el7-10.noarch.rpm
已加载插件:fastestmirror
正在检查 mysql57-community-release-el7-10.noarch.rpm: mysql57-community-release-el7-10.noarch
mysql57-community-release-el7-10.noarch.rpm 将被安装
正在解决依赖关系
--> 正在检查事务
---> 软件包 mysql57-community-release.noarch.0.el7-10 将被 安装
--> 解决依赖关系完成
 
依赖关系解决
 
==================================================================================================================================
 Package                             架构             版本               源                                                  大小
==================================================================================================================================
正在安装:
 mysql57-community-release           noarch           el7-10             /mysql57-community-release-el7-10.noarch            30 k
 
事务概要
==================================================================================================================================
安装  1 软件包
 
总计:30 k
安装大小:30 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  正在安装    : mysql57-community-release-el7-10.noarch                                                                       1/1 
  验证中      : mysql57-community-release-el7-10.noarch                                                                       1/1 
 
已安装:
  mysql57-community-release.noarch 0:el7-10                                                                                       
 
完毕!
[root@localhost ~]# 
查看mysql的yum repo源:mysql-community.repo 和 mysql-community-source.repo

[root@localhost ~]# ls -l /etc/yum.repos.d/
总用量 40
-rw-r--r--. 1 root root 1664 4月  29 00:35 CentOS-Base.repo
-rw-r--r--. 1 root root 1309 4月  29 00:35 CentOS-CR.repo
-rw-r--r--. 1 root root  649 4月  29 00:35 CentOS-Debuginfo.repo
-rw-r--r--. 1 root root  314 4月  29 00:35 CentOS-fasttrack.repo
-rw-r--r--. 1 root root  630 4月  29 00:35 CentOS-Media.repo
-rw-r--r--. 1 root root 1331 4月  29 00:35 CentOS-Sources.repo
-rw-r--r--. 1 root root 4768 4月  29 00:35 CentOS-Vault.repo
-rw-r--r--. 1 root root 1627 4月   5 2017 mysql-community.repo
-rw-r--r--. 1 root root 1663 4月   5 2017 mysql-community-source.repo
[root@localhost ~]# 

三、使用yum安装MySQL服务,此步骤会安装mysql的依赖包,会浪费一些时间

[root@localhost ~]# yum -y install mysql-community-server
已加载插件:fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.zju.edu.cn
 * extras: mirrors.zju.edu.cn
 * updates: mirrors.shu.edu.cn
mysql-connectors-community                                                                                 | 2.5 kB  00:00:00     
mysql-tools-community                                                                                      | 2.5 kB  00:00:00     
mysql57-community                                                                                          | 2.5 kB  00:00:00     
(1/3): mysql-connectors-community/x86_64/primary_db                                                        |  20 kB  00:00:05     
(2/3): mysql-tools-community/x86_64/primary_db                                                             |  41 kB  00:00:06     
(3/3): mysql57-community/x86_64/primary_db                                                                 | 144 kB  00:00:06     
正在解决依赖关系
--> 正在检查事务
---> 软件包 mysql-community-server.x86_64.0.5.7.22-1.el7 将被 安装
--> 正在处理依赖关系 mysql-community-common(x86-64) = 5.7.22-1.el7,它被软件包 mysql-community-server-5.7.22-1.el7.x86_64 需要
--> 正在处理依赖关系 mysql-community-client(x86-64) >= 5.7.9,它被软件包 mysql-community-server-5.7.22-1.el7.x86_64 需要
.
.
.
---> 软件包 perl-HTTP-Tiny.noarch.0.0.033-3.el7 将被 安装
---> 软件包 perl-parent.noarch.1.0.225-244.el7 将被 安装
--> 解决依赖关系完成
 
依赖关系解决
 
==================================================================================================================================
 Package                                架构              版本                                 源                            大小
==================================================================================================================================
正在安装:
 mysql-community-libs                   x86_64            5.7.22-1.el7                         mysql57-community            2.1 M
      替换  mariadb-libs.x86_64 1:5.5.56-2.el7
 mysql-community-libs-compat            x86_64            5.7.22-1.el7                         mysql57-community            2.0 M
      替换  mariadb-libs.x86_64 1:5.5.56-2.el7
 mysql-community-server                 x86_64            5.7.22-1.el7                         mysql57-community            165 M
为依赖而安装:
 mysql-community-client                 x86_64            5.7.22-1.el7                         mysql57-community             24 M
 mysql-community-common                 x86_64            5.7.22-1.el7                         mysql57-community            274 k
 net-tools                              x86_64            2.0-0.22.20131004git.el7             base                         305 k
 .
 .
 .
 perl-threads                           x86_64            1.87-4.el7                           base                          49 k
 perl-threads-shared                    x86_64            1.43-6.el7                           base                          39 k
 
事务概要
==================================================================================================================================
安装  3 软件包 (+30 依赖软件包)
 
总下载量:205 M
Downloading packages:
警告:/var/cache/yum/x86_64/7/mysql57-community/packages/mysql-community-common-5.7.22-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
mysql-community-common-5.7.22-1.el7.x86_64.rpm 的公钥尚未安装
(1/33): mysql-community-common-5.7.22-1.el7.x86_64.rpm                                                     | 274 kB  00:00:07     
(2/33): mysql-community-libs-5.7.22-1.el7.x86_64.rpm                                                       | 2.1 MB  00:01:00     
 .
 .
 .   
(32/33): mysql-community-client-5.7.22-1.el7.x86_64.rpm                                                    |  24 MB  00:11:56     
(33/33): mysql-community-server-5.7.22-1.el7.x86_64.rpm                                                    | 165 MB  01:05:31     
----------------------------------------------------------------------------------------------------------------------------------
总计                                                                                               52 kB/s | 205 MB  01:07:47     
从 file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql 检索密钥
导入 GPG key 0x5072E1F5:
 用户ID     : "MySQL Release Engineering <mysql-build@oss.oracle.com>"
 指纹       : a4a9 4068 76fc bd3c 4567 70c8 8c71 8d3b 5072 e1f5
 软件包     : mysql57-community-release-el7-10.noarch (installed)
 来自       : /etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  正在安装    : mysql-community-common-5.7.22-1.el7.x86_64                                                                   1/34 
  正在安装    : mysql-community-libs-5.7.22-1.el7.x86_64                                                                     2/34 
  .
  .
  .  
  正在安装    : mysql-community-libs-compat-5.7.22-1.el7.x86_64                                                             33/34 
  正在删除    : 1:mariadb-libs-5.5.56-2.el7.x86_64                                                                          34/34 
  验证中      : mysql-community-libs-compat-5.7.22-1.el7.x86_64                                                              1/34 
  验证中      : perl-HTTP-Tiny-0.033-3.el7.noarch                                                                            2/34 
  .
  .
  .  
  验证中      : perl-Text-ParseWords-3.29-4.el7.noarch                                                                      32/34 
  验证中      : mysql-community-client-5.7.22-1.el7.x86_64                                                                  33/34 
  验证中      : 1:mariadb-libs-5.5.56-2.el7.x86_64                                                                          34/34 
 
已安装:
  mysql-community-libs.x86_64 0:5.7.22-1.el7                    mysql-community-libs-compat.x86_64 0:5.7.22-1.el7                 
  mysql-community-server.x86_64 0:5.7.22-1.el7                 
 
作为依赖被安装:
  mysql-community-client.x86_64 0:5.7.22-1.el7                    mysql-community-common.x86_64 0:5.7.22-1.el7                   
  net-tools.x86_64 0:2.0-0.22.20131004git.el7                     perl.x86_64 4:5.16.3-292.el7                                   
 .
 .
 .                         
  perl-threads.x86_64 0:1.87-4.el7                                perl-threads-shared.x86_64 0:1.43-6.el7                        
 
替代:
  mariadb-libs.x86_64 1:5.5.56-2.el7                                                                                              
 
完毕!
[root@localhost ~]# 

四、启动并查看Mysql状态

[root@localhost ~]# systemctl start mysqld.service
[root@localhost ~]# systemctl status mysqld.service
● mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since 四 2018-07-26 12:21:21 CST; 11s ago
     Docs: man:mysqld(8)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
  Process: 4113 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
  Process: 4040 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
 Main PID: 4116 (mysqld)
   CGroup: /system.slice/mysqld.service
           └─4116 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid
 
7月 26 12:21:06 localhost.localdomain systemd[1]: Starting MySQL Server...
7月 26 12:21:21 localhost.localdomain systemd[1]: Started MySQL Server.
[root@localhost ~]# 

五、查看mysql初始化密码

  • 此次mysql初始化密码为:1#(EdfAGebE5
  • 需要使用grep "password" /var/log/mysqld.log命令查看
[root@localhost ~]# grep "password" /var/log/mysqld.log
2018-07-26T04:21:09.246395Z 1 [Note] A temporary password is generated for root@localhost: 1#(EdfAGebE5
[root@localhost ~]# 

六、登陆mysql,并输入出厂密码

[root@localhost ~]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.22
 
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> 
 

七、修改root用户密码

  • mysql强制用户必须修改密码,不然只能登陆,却不能操作数据库(注意:在修改密码时密码复杂度不能太简单,如:123456,但是我们自己开发时又不想设置的太复杂,所以在修改密码之前先修改密码复杂度,如若不想修改密码复杂度,请直接执行ALTER语句)
# 密码可以只有一种字符
mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.00 sec)
# 密码最小长度为1 
mysql> set global validate_password_length=1;
Query OK, 0 rows affected (0.00 sec)
 
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'hadoop';
Query OK, 0 rows affected (0.00 sec)
 
mysql> 

八、修改默认字符集

  • mysql默认的database和server字符集为latin1,我们需要把它修改为utf8
mysql> show variables like 'character%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | latin1                     |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                       |
| character_set_server     | latin1                     |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.01 sec)
 
mysql> set character_set_database=utf8;
Query OK, 0 rows affected, 1 warning (0.00 sec)
 
mysql> set character_set_server=utf8;
Query OK, 0 rows affected (0.00 sec)
 
mysql> 

九、授权root用户可以从任意主机登录(注意将hadoop换成自己的密码)

mysql> grant all privileges on *.* to root@"%" identified by "hadoop" with grant option;
Query OK, 0 rows affected, 1 warning (0.00 sec)
 
mysql> 

十、退出并重启mysql服务

mysql> quit
Bye
[root@localhost ~]# systemctl restart mysqld.service
[root@localhost ~]# 

十一、开放端口3306端口

[root@localhost ~]# firewall-cmd --zone=public --add-port=3306/tcp --permanent
success
[root@localhost ~]# firewall-cmd --reload
success
[root@localhost ~]# 
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