使用yum源的方式单机部署MySQL8.0.13
作者：尹正杰
版权声明：原创作品，谢绝转载！否则将追究法律责任。
基本上开源的软件都支持三种安装方式，即rmp方式安装，源码安装和二进制方式安装。在实际生成环境中用到最多的方式莫过于二进制方式安装或者rmp方式安装。其中rmp方式安装是最常见的，比如Linux的Redhat/CentOS法相版本的yum管理工具，其实就是基于rpm方式安装，只不过它能帮我们解决rpm包的依赖关系即可。我在之前的笔记中介绍过MySQL5.7版本的以上三种安装方式。最近在学习MySQL8.0的一些心特性，顺手整理一下学习笔记，本片博客我们一起来学习一下MySQL8.0版本的yum安装方式。
我个人并不喜欢yum方式安装，虽然它的安装方式比较简单 ，官方说需要配置yum源即可。但是yum方式安装的可移植性相当差，官方参考地址：https://dev.mysql.com/doc/refman/8.0/en/linux-installation-yum-repo.html。
一.安装MySQL前准备工作
1>.操作环境
[root@node101 ~]# cat /etc/redhat-release CentOS Linux release 7.2.1511 (Core) [root@node101 ~]# [root@node101 ~]# uname -r 3.10.0-327.el7.x86_64 [root@node101 ~]# [root@node101 ~]# uname -m x86_64 [root@node101 ~]# [root@node101 ~]# hostname node101.yinzhengjie.org.cn [root@node101 ~]# [root@node101 ~]# hostname -i 172.30.1.101 [root@node101 ~]# [root@node101 ~]# free -h total used free shared buff/cache available Mem: 3.5G 124M 3.1G 8.4M 232M 3.2G Swap: 2.0G 0B 2.0G [root@node101 ~]# [root@node101 ~]#
2>.卸载与mysql相关的服务
[root@node101 ~]# ls /etc/my.cnf #我们查看mysql的默认配置文件存放路径，发现我们还没有安装就已经又它存在啦！ /etc/my.cnf [root@node101 ~]# [root@node101 ~]# rpm -qa | grep mysql #果不其然， 我们发现的确安装了mysql相关的安装包 pcp-pmda-mysql-3.10.6-2.el7.x86_64 [root@node101 ~]# [root@node101 ~]# rpm -qa | grep mariadb #原来我们在安装CentOs操作系统时，我的虚拟化软件默认的安装方式就帮我安装了mariadb呀！ mariadb-libs-5.5.44-2.el7.centos.x86_64 [root@node101 ~]#
[root@node101 ~]# yum -y remove pcp-pmda-mysql-3.10.6-2.el7.x86_64 Loaded plugins: fastestmirror, langpacks Resolving Dependencies --> Running transaction check ---> Package pcp-pmda-mysql.x86_64 0:3.10.6-2.el7 will be erased --> Processing Dependency: pcp-pmda-mysql for package: pcp-compat-3.10.6-2.el7.x86_64 --> Running transaction check ---> Package pcp-compat.x86_64 0:3.10.6-2.el7 will be erased --> Processing Dependency: pcp-compat for package: pcp-3.10.6-2.el7.x86_64 --> Running transaction check ---> Package pcp.x86_64 0:3.10.6-2.el7 will be erased --> Processing Dependency: pcp = 3.10.6-2.el7 for package: pcp-pmda-summary-3.10.6-2.el7.x86_64 --> Processing Dependency: pcp = 3.10.6-2.el7 for package: pcp-pmda-sendmail-3.10.6-2.el7.x86_64 --> Processing Dependency: pcp = 3.10.6-2.el7 for package: pcp-pmda-weblog-3.10.6-2.el7.x86_64 --> Processing Dependency: pcp = 3.10.6-2.el7 for package: pcp-pmda-lustrecomm-3.10.6-2.el7.x86_64 --> Processing Dependency: pcp = 3.10.6-2.el7 for package: pcp-pmda-rpm-3.10.6-2.el7.x86_64 --> Processing Dependency: pcp = 3.10.6-2.el7 for package: python-pcp-3.10.6-2.el7.x86_64 --> Processing Dependency: pcp = 3.10.6-2.el7 for package: pcp-pmda-roomtemp-3.10.6-2.el7.x86_64 --> Running transaction check ---> Package pcp-pmda-lustrecomm.x86_64 0:3.10.6-2.el7 will be erased ---> Package pcp-pmda-roomtemp.x86_64 0:3.10.6-2.el7 will be erased ---> Package pcp-pmda-rpm.x86_64 0:3.10.6-2.el7 will be erased ---> Package pcp-pmda-sendmail.x86_64 0:3.10.6-2.el7 will be erased ---> Package pcp-pmda-summary.x86_64 0:3.10.6-2.el7 will be erased ---> Package pcp-pmda-weblog.x86_64 0:3.10.6-2.el7 will be erased ---> Package python-pcp.x86_64 0:3.10.6-2.el7 will be erased --> Processing Dependency: python-pcp = 3.10.6-2.el7 for package: pcp-system-tools-3.10.6-2.el7.x86_64 --> Processing Dependency: python-pcp for package: pcp-pmda-gluster-3.10.6-2.el7.x86_64 --> Processing Dependency: python-pcp for package: pcp-pmda-json-3.10.6-2.el7.x86_64 --> Processing Dependency: python-pcp for package: pcp-pmda-zswap-3.10.6-2.el7.x86_64 --> Processing Dependency: python-pcp = 3.10.6-2.el7 for package: pcp-export-pcp2graphite-3.10.6-2.el7.x86_64 --> Processing Dependency: python-pcp for package: pcp-pmda-unbound-3.10.6-2.el7.x86_64 --> Running transaction check ---> Package pcp-export-pcp2graphite.x86_64 0:3.10.6-2.el7 will be erased ---> Package pcp-pmda-gluster.x86_64 0:3.10.6-2.el7 will be erased ---> Package pcp-pmda-json.x86_64 0:3.10.6-2.el7 will be erased ---> Package pcp-pmda-unbound.x86_64 0:3.10.6-2.el7 will be erased ---> Package pcp-pmda-zswap.x86_64 0:3.10.6-2.el7 will be erased ---> Package pcp-system-tools.x86_64 0:3.10.6-2.el7 will be erased --> Finished Dependency Resolution base/7/x86_64 | 3.6 kB 00:00:00 epel/x86_64/metalink | 8.3 kB 00:00:00 epel/x86_64 | 4.7 kB 00:00:00 epel/x86_64/updateinfo | 949 kB 00:00:00 epel/x86_64/primary_db | 6.6 MB 00:00:07 extras/7/x86_64 | 3.4 kB 00:00:00 updates/7/x86_64 | 3.4 kB 00:00:00 updates/7/x86_64/primary_db | 1.3 MB 00:00:01 Dependencies Resolved ================================================================================================================================= Package Arch Version Repository Size ================================================================================================================================= Removing: pcp-pmda-mysql x86_64 3.10.6-2.el7 @anaconda 95 k Removing for dependencies: pcp x86_64 3.10.6-2.el7 @anaconda 2.9 M pcp-compat x86_64 3.10.6-2.el7 @anaconda 0.0 pcp-export-pcp2graphite x86_64 3.10.6-2.el7 @anaconda 12 k pcp-pmda-gluster x86_64 3.10.6-2.el7 @anaconda 17 k pcp-pmda-json x86_64 3.10.6-2.el7 @anaconda 66 k pcp-pmda-lustrecomm x86_64 3.10.6-2.el7 @anaconda 26 k pcp-pmda-roomtemp x86_64 3.10.6-2.el7 @anaconda 31 k pcp-pmda-rpm x86_64 3.10.6-2.el7 @anaconda 45 k pcp-pmda-sendmail x86_64 3.10.6-2.el7 @anaconda 39 k pcp-pmda-summary x86_64 3.10.6-2.el7 @anaconda 34 k pcp-pmda-unbound x86_64 3.10.6-2.el7 @anaconda 66 k pcp-pmda-weblog x86_64 3.10.6-2.el7 @anaconda 159 k pcp-pmda-zswap x86_64 3.10.6-2.el7 @anaconda 9.0 k pcp-system-tools x86_64 3.10.6-2.el7 @anaconda 261 k python-pcp x86_64 3.10.6-2.el7 @anaconda 400 k Transaction Summary ================================================================================================================================= Remove 1 Package (+15 Dependent packages) Installed size: 4.1 M Downloading packages: Running transaction check Running transaction test Transaction test succeeded Running transaction Erasing : pcp-pmda-roomtemp-3.10.6-2.el7.x86_64 1/16 Erasing : pcp-pmda-sendmail-3.10.6-2.el7.x86_64 2/16 Erasing : pcp-pmda-lustrecomm-3.10.6-2.el7.x86_64 3/16 Erasing : pcp-pmda-gluster-3.10.6-2.el7.x86_64 4/16 Erasing : pcp-pmda-zswap-3.10.6-2.el7.x86_64 5/16 Erasing : pcp-system-tools-3.10.6-2.el7.x86_64 6/16 Erasing : pcp-export-pcp2graphite-3.10.6-2.el7.x86_64 7/16 Erasing : pcp-pmda-json-3.10.6-2.el7.x86_64 8/16 Erasing : pcp-pmda-rpm-3.10.6-2.el7.x86_64 9/16 Erasing : pcp-pmda-summary-3.10.6-2.el7.x86_64 10/16 Erasing : pcp-pmda-weblog-3.10.6-2.el7.x86_64 11/16 Erasing : pcp-compat-3.10.6-2.el7.x86_64 12/16 Erasing : pcp-pmda-unbound-3.10.6-2.el7.x86_64 13/16 Erasing : pcp-3.10.6-2.el7.x86_64 14/16 Erasing : python-pcp-3.10.6-2.el7.x86_64 15/16 Erasing : pcp-pmda-mysql-3.10.6-2.el7.x86_64 16/16 Verifying : pcp-pmda-unbound-3.10.6-2.el7.x86_64 1/16 Verifying : pcp-pmda-lustrecomm-3.10.6-2.el7.x86_64 2/16 Verifying : pcp-pmda-sendmail-3.10.6-2.el7.x86_64 3/16 Verifying : python-pcp-3.10.6-2.el7.x86_64 4/16 Verifying : pcp-system-tools-3.10.6-2.el7.x86_64 5/16 Verifying : pcp-pmda-summary-3.10.6-2.el7.x86_64 6/16 Verifying : pcp-pmda-rpm-3.10.6-2.el7.x86_64 7/16 Verifying : pcp-pmda-roomtemp-3.10.6-2.el7.x86_64 8/16 Verifying : pcp-pmda-zswap-3.10.6-2.el7.x86_64 9/16 Verifying : pcp-3.10.6-2.el7.x86_64 10/16 Verifying : pcp-pmda-gluster-3.10.6-2.el7.x86_64 11/16 Verifying : pcp-compat-3.10.6-2.el7.x86_64 12/16 Verifying : pcp-export-pcp2graphite-3.10.6-2.el7.x86_64 13/16 Verifying : pcp-pmda-json-3.10.6-2.el7.x86_64 14/16 Verifying : pcp-pmda-weblog-3.10.6-2.el7.x86_64 15/16 Verifying : pcp-pmda-mysql-3.10.6-2.el7.x86_64 16/16 Removed: pcp-pmda-mysql.x86_64 0:3.10.6-2.el7 Dependency Removed: pcp.x86_64 0:3.10.6-2.el7 pcp-compat.x86_64 0:3.10.6-2.el7 pcp-export-pcp2graphite.x86_64 0:3.10.6-2.el7 pcp-pmda-gluster.x86_64 0:3.10.6-2.el7 pcp-pmda-json.x86_64 0:3.10.6-2.el7 pcp-pmda-lustrecomm.x86_64 0:3.10.6-2.el7 pcp-pmda-roomtemp.x86_64 0:3.10.6-2.el7 pcp-pmda-rpm.x86_64 0:3.10.6-2.el7 pcp-pmda-sendmail.x86_64 0:3.10.6-2.el7 pcp-pmda-summary.x86_64 0:3.10.6-2.el7 pcp-pmda-unbound.x86_64 0:3.10.6-2.el7 pcp-pmda-weblog.x86_64 0:3.10.6-2.el7 pcp-pmda-zswap.x86_64 0:3.10.6-2.el7 pcp-system-tools.x86_64 0:3.10.6-2.el7 python-pcp.x86_64 0:3.10.6-2.el7 Complete! [root@node101 ~]#
[root@node101 ~]# yum -y remove mariadb-libs-5.5.44-2.el7.centos.x86_64 Loaded plugins: fastestmirror, langpacks Resolving Dependencies --> Running transaction check ---> Package mariadb-libs.x86_64 1:5.5.44-2.el7.centos will be erased --> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 2:postfix-2.10.1-6.el7.x86_64 --> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package: 2:postfix-2.10.1-6.el7.x86_64 --> Running transaction check ---> Package postfix.x86_64 2:2.10.1-6.el7 will be erased --> Processing Dependency: postfix = 2:2.10.1-6.el7 for package: 2:postfix-perl-scripts-2.10.1-6.el7.x86_64 --> Running transaction check ---> Package postfix-perl-scripts.x86_64 2:2.10.1-6.el7 will be erased --> Processing Dependency: postfix-perl-scripts for package: pcp-pmda-postfix-3.10.6-2.el7.x86_64 --> Running transaction check ---> Package pcp-pmda-postfix.x86_64 0:3.10.6-2.el7 will be erased --> Finished Dependency Resolution Dependencies Resolved ================================================================================================================================= Package Arch Version Repository Size ================================================================================================================================= Removing: mariadb-libs x86_64 1:5.5.44-2.el7.centos @anaconda 4.4 M Removing for dependencies: pcp-pmda-postfix x86_64 3.10.6-2.el7 @anaconda 8.6 k postfix x86_64 2:2.10.1-6.el7 @anaconda 12 M postfix-perl-scripts x86_64 2:2.10.1-6.el7 @anaconda 109 k Transaction Summary ================================================================================================================================= Remove 1 Package (+3 Dependent packages) Installed size: 17 M Downloading packages: Running transaction check Running transaction test Transaction test succeeded Running transaction Erasing : pcp-pmda-postfix-3.10.6-2.el7.x86_64 1/4 Erasing : 2:postfix-perl-scripts-2.10.1-6.el7.x86_64 2/4 Erasing : 2:postfix-2.10.1-6.el7.x86_64 3/4 Erasing : 1:mariadb-libs-5.5.44-2.el7.centos.x86_64 4/4 Verifying : 1:mariadb-libs-5.5.44-2.el7.centos.x86_64 1/4 Verifying : pcp-pmda-postfix-3.10.6-2.el7.x86_64 2/4 Verifying : 2:postfix-perl-scripts-2.10.1-6.el7.x86_64 3/4 Verifying : 2:postfix-2.10.1-6.el7.x86_64 4/4 Removed: mariadb-libs.x86_64 1:5.5.44-2.el7.centos Dependency Removed: pcp-pmda-postfix.x86_64 0:3.10.6-2.el7 postfix.x86_64 2:2.10.1-6.el7 postfix-perl-scripts.x86_64 2:2.10.1-6.el7 Complete! [root@node101 ~]#
[root@node101 ~]# rpm -qa | grep mysql #mysql相关的安装包被卸载了 [root@node101 ~]# [root@node101 ~]# rpm -qa | grep mariadb #maridb相关的安装包被卸载了 [root@node101 ~]# [root@node101 ~]# ls /etc/my.cnf #卸载成功后，配置文件也随之被删除啦！ ls: cannot access /etc/my.cnf: No such file or directory [root@node101 ~]# [root@node101 ~]#
3>.查看MySQl官网提供的yum资源（https://dev.mysql.com/downloads/repo/yum/）
4>.选择对应的操作系统
5>.无需登录，直接下载上传到服务器即可（或者咱们也可以直接在服务器上使用wget命令安装也是可以的哟！）
二.使用yum源的方式安装MySQL
1>.登录服务器，下载mysql的rpm源
[root@node101 ~]# wget https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm --2019-01-17 11:40:56-- https://dev.mysql.com/get/mysql80-community-release-el7-1.noarch.rpm Resolving dev.mysql.com (dev.mysql.com)... 137.254.60.11 Connecting to dev.mysql.com (dev.mysql.com)|137.254.60.11|:443... connected. HTTP request sent, awaiting response... 302 Found Location: https://repo.mysql.com//mysql80-community-release-el7-1.noarch.rpm [following] --2019-01-17 11:40:57-- https://repo.mysql.com//mysql80-community-release-el7-1.noarch.rpm Resolving repo.mysql.com (repo.mysql.com)... 23.51.209.162 Connecting to repo.mysql.com (repo.mysql.com)|23.51.209.162|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 25820 (25K) [application/x-redhat-package-manager] Saving to: ‘mysql80-community-release-el7-1.noarch.rpm’ 100%[=======================================================================================>] 25,820 --.-K/s in 0.06s 2019-01-17 11:40:58 (434 KB/s) - ‘mysql80-community-release-el7-1.noarch.rpm’ saved [25820/25820] [root@node101 ~]# [root@node101 ~]# ll total 28 -rw-r--r--. 1 root root 25820 Apr 18 2018 mysql80-community-release-el7-1.noarch.rpm [root@node101 ~]#
2>.安装yum源
[root@node101 ~]# ll /etc/yum.repos.d/ | grep mysql [root@node101 ~]# [root@node101 ~]# ll total 28 -rw-r--r--. 1 root root 25820 Apr 18 2018 mysql80-community-release-el7-1.noarch.rpm [root@node101 ~]# [root@node101 ~]# rpm -ivh mysql80-community-release-el7-1.noarch.rpm warning: mysql80-community-release-el7-1.noarch.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY Preparing... ################################# [100%] Updating / installing... 1:mysql80-community-release-el7-1 ################################# [100%] [root@node101 ~]# [root@node101 ~]# ll /etc/yum.repos.d/ | grep mysql -rw-r--r--. 1 root root 1864 Feb 22 2018 mysql-community.repo -rw-r--r--. 1 root root 1885 Feb 22 2018 mysql-community-source.repo [root@node101 ~]# [root@node101 ~]#
3>.安装MySQL服务
[root@node101 ~]# yum -y install mysql-community-server Loaded plugins: fastestmirror, langpacks mysql-connectors-community | 2.5 kB 00:00:00 mysql-tools-community | 2.5 kB 00:00:00 mysql80-community | 2.5 kB 00:00:00 (1/3): mysql-connectors-community/x86_64/primary_db | 29 kB 00:00:00 (2/3): mysql-tools-community/x86_64/primary_db | 48 kB 00:00:00 (3/3): mysql80-community/x86_64/primary_db | 35 kB 00:00:00 Loading mirror speeds from cached hostfile * base: mirrors.aliyun.com * epel: mirrors.yun-idc.com * extras: mirror.jdcloud.com * updates: mirrors.tuna.tsinghua.edu.cn Resolving Dependencies --> Running transaction check ---> Package mysql-community-server.x86_64 0:8.0.13-1.el7 will be installed --> Processing Dependency: mysql-community-common(x86-64) = 8.0.13-1.el7 for package: mysql-community-server-8.0.13-1.el7.x86_64 --> Processing Dependency: mysql-community-client(x86-64) >= 8.0.0 for package: mysql-community-server-8.0.13-1.el7.x86_64 --> Running transaction check ---> Package mysql-community-client.x86_64 0:8.0.13-1.el7 will be installed --> Processing Dependency: mysql-community-libs(x86-64) >= 8.0.0 for package: mysql-community-client-8.0.13-1.el7.x86_64 ---> Package mysql-community-common.x86_64 0:8.0.13-1.el7 will be installed --> Running transaction check ---> Package mysql-community-libs.x86_64 0:8.0.13-1.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================================================================= Package Arch Version Repository Size ================================================================================================================================= Installing: mysql-community-server x86_64 8.0.13-1.el7 mysql80-community 381 M Installing for dependencies: mysql-community-client x86_64 8.0.13-1.el7 mysql80-community 26 M mysql-community-common x86_64 8.0.13-1.el7 mysql80-community 554 k mysql-community-libs x86_64 8.0.13-1.el7 mysql80-community 2.3 M Transaction Summary ================================================================================================================================= Install 1 Package (+3 Dependent packages) Total download size: 410 M Installed size: 1.8 G Downloading packages: warning: /var/cache/yum/x86_64/7/mysql80-community/packages/mysql-community-common-8.0.13-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY Public key for mysql-community-common-8.0.13-1.el7.x86_64.rpm is not installed (1/4): mysql-community-common-8.0.13-1.el7.x86_64.rpm | 554 kB 00:00:02 (2/4): mysql-community-libs-8.0.13-1.el7.x86_64.rpm | 2.3 MB 00:00:13 (3/4): mysql-community-client-8.0.13-1.el7.x86_64.rpm | 26 MB 00:00:42 (4/4): mysql-community-server-8.0.13-1.el7.x86_64.rpm | 381 MB 00:25:40 --------------------------------------------------------------------------------------------------------------------------------- Total 269 kB/s | 410 MB 00:25:56 Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql Importing GPG key 0x5072E1F5: Userid : "MySQL Release Engineering <mysql-build@oss.oracle.com>" Fingerprint: a4a9 4068 76fc bd3c 4567 70c8 8c71 8d3b 5072 e1f5 Package : mysql80-community-release-el7-1.noarch (installed) From : /etc/pki/rpm-gpg/RPM-GPG-KEY-mysql Running transaction check Running transaction test Transaction test succeeded Running transaction Warning: RPMDB altered outside of yum. Installing : mysql-community-common-8.0.13-1.el7.x86_64 1/4 Installing : mysql-community-libs-8.0.13-1.el7.x86_64 2/4 Installing : mysql-community-client-8.0.13-1.el7.x86_64 3/4 Installing : mysql-community-server-8.0.13-1.el7.x86_64 4/4 Verifying : mysql-community-server-8.0.13-1.el7.x86_64 1/4 Verifying : mysql-community-libs-8.0.13-1.el7.x86_64 2/4 Verifying : mysql-community-common-8.0.13-1.el7.x86_64 3/4 Verifying : mysql-community-client-8.0.13-1.el7.x86_64 4/4 Installed: mysql-community-server.x86_64 0:8.0.13-1.el7 Dependency Installed: mysql-community-client.x86_64 0:8.0.13-1.el7 mysql-community-common.x86_64 0:8.0.13-1.el7 mysql-community-libs.x86_64 0:8.0.13-1.el7 Complete! [root@node101 ~]#
4>.设置MySQL开机自启
[root@node101 ~]# systemctl enable mysqld #设置开机自启动 [root@node101 ~]# [root@node101 ~]# systemctl start mysqld #启动MySQL [root@node101 ~]# [root@node101 ~]# [root@node101 ~]# systemctl status mysqld #查看MySQL的运行状态 ● mysqld.service - MySQL Server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled) Active: active (running) since Thu 2019-01-17 12:20:51 HKT; 6s ago Docs: man:mysqld(8) http://dev.mysql.com/doc/refman/en/using-systemd.html Process: 16701 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS) Main PID: 16792 (mysqld) Status: "SERVER_OPERATING" CGroup: /system.slice/mysqld.service └─16792 /usr/sbin/mysqld Jan 17 12:20:44 node101.yinzhengjie.org.cn systemd[1]: Starting MySQL Server... Jan 17 12:20:51 node101.yinzhengjie.org.cn systemd[1]: Started MySQL Server. [root@node101 ~]# [root@node101 ~]#
5>.查看mysql的启动日志（[root@node101 ~]# tail /var/log/mysqld.log ）
[root@node101 ~]# grep 'temporary password' /var/log/mysqld.log 2019-01-17T04:20:47.536393Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: gZSt9j>Q;LZ. #这里mysql的临时密码！ [root@node101 ~]# [root@node101 ~]#
6>.链接mysql服务器并修改密码
[root@node101 ~]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 10 Server version: 8.0.13 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> show databases; #这个报错很正常，说是你没有修改密不允许执行SQL语句 ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement. mysql> mysql> alter user user() identified by 'yinzhengjie'; #这条命令是修改当前用户的密码没错，但是密码太简单，不符合默认的MEDIUM安全规则，用数字表示为1。 ERROR 1819 (HY000): Your password does not satisfy the current policy requirements mysql> mysql> alter user user() identified by 'yzj@2019MySQL'; #我们按照要求，修改符合MEDIUM安全策略的密码。 Query OK, 0 rows affected (0.06 sec) mysql> quit Bye [root@node101 ~]#
[root@node101 ~]# mysql -uroot -pyzj@2019MySQL mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 11 Server version: 8.0.13 MySQL Community Server - GPL 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> show variables like '%validate_password_policy%'; +--------------------------+--------+ | Variable_name | Value | +--------------------------+--------+ | validate_password.policy | MEDIUM | +--------------------------+--------+ 1 row in set (0.00 sec) mysql>
[root@node101 ~]# mysql -uroot -pyzj@2019MySQL #使用修改后的密码登录数据库 mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 11 Server version: 8.0.13 MySQL Community Server - GPL 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> show variables like '%validate_password_policy%'; #查看MySQL默认设置的安全级别！我擦！原来是他在搞鬼，让我没法把密码设置短一些！ +--------------------------+--------+ | Variable_name | Value | +--------------------------+--------+ | validate_password.policy | MEDIUM | +--------------------------+--------+ 1 row in set (0.00 sec) mysql> mysql> set GLOBAL validate_password.policy=0; #我们把安全策略从1降低为0 Query OK, 0 rows affected (0.00 sec) mysql> mysql> alter user user() identified by 'yinzhengjie'; #发现修改密码可以设置为简单的啦！ Query OK, 0 rows affected (0.11 sec) mysql> quit Bye [root@node101 ~]# mysql -uroot -pyinzhengjie #使用我自定义的密码登录 mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 12 Server version: 8.0.13 MySQL Community Server - GPL 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> show variables like '%validate_password_policy%'; #在次查看mysql 的安全策略，其Value变为Low啦！ +--------------------------+-------+ | Variable_name | Value | +--------------------------+-------+ | validate_password.policy | LOW | +--------------------------+-------+ 1 row in set (0.01 sec) mysql> quit Bye [root@node101 ~]#
validate_password_policy各项值说明：密码安全策略，默认MEDIUM策略（小伙们别着急，后期我会抓门写一篇关于它的笔记，等不及的小伙伴可以先看官网，使用谷歌右键翻译即可！）
| 策略 | 检查规则 |
| 0 or LOW | Length |
| 1 or MEDIUM | Length; numeric, lowercase/uppercase, and special characters |
| 2 or STRONG | Length; numeric, lowercase/uppercase, and special characters; dictionary file |