今天使用centos7进行mysql5.7的安装，出现挫折，记录如下：
下载安装mysql
下载rpm安装包
wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm --2022-01-22 03:01:53-- http://dev.mysql.com/get/mysql57-community-release-el7-8.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|:80... connected. http request sent, awaiting response... 301 moved permanently location: https://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm [following] --2022-01-22 03:01:54-- https://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm 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//mysql57-community-release-el7-8.noarch.rpm [following] --2022-01-22 03:01:55-- https://repo.mysql.com//mysql57-community-release-el7-8.noarch.rpm resolving repo.mysql.com (repo.mysql.com)... 23.36.253.13 connecting to repo.mysql.com (repo.mysql.com)|23.36.253.13|:443... connected. http request sent, awaiting response... 200 ok length: 9116 (8.9k) [application/x-redhat-package-manager] saving to: ‘mysql57-community-release-el7-8.noarch.rpm' 100%[=========================================================================================================================================================================>] 9,116 --.-k/s in 0s 2022-01-22 03:01:55 (249 mb/s) - ‘mysql57-community-release-el7-8.noarch.rpm' saved [9116/9116]
安装
yum localinstall mysql57-community-release-el7-8.noarch.rpm
(py3) [root@localhost opt]# yum localinstall mysql57-community-release-el7-8.noarch.rpm loaded plugins: fastestmirror, langpacks examining mysql57-community-release-el7-8.noarch.rpm: mysql57-community-release-el7-8.noarch marking mysql57-community-release-el7-8.noarch.rpm to be installed resolving dependencies --> running transaction check ---> package mysql57-community-release.noarch 0:el7-8 will be installed --> finished dependency resolution dependencies resolved =================================================================================================================================================================================================================== package arch version repository size =================================================================================================================================================================================================================== installing: mysql57-community-release noarch el7-8 /mysql57-community-release-el7-8.noarch 8.2 k transaction summary =================================================================================================================================================================================================================== install 1 package total size: 8.2 k installed size: 8.2 k is this ok [y/d/n]: y downloading packages: running transaction check running transaction test transaction test succeeded running transaction installing : mysql57-community-release-el7-8.noarch 1/1 verifying : mysql57-community-release-el7-8.noarch 1/1 installed: mysql57-community-release.noarch 0:el7-8 complete!
查看安装情况
(py3) [root@localhost opt]# yum repolist enabled | grep "mysql.*-community.*" mysql-connectors-community/x86_64 mysql connectors community 167 mysql-tools-community/x86_64 mysql tools community 82 mysql57-community/x86_64 mysql 5.7 community server 564
安装server
yum -y install mysql-community-server
(py3) [root@localhost opt]# yum -y install mysql-community-server loaded plugins: fastestmirror, langpacks loading mirror speeds from cached hostfile * base: mirrors.tuna.tsinghua.edu.cn * extras: mirrors.tuna.tsinghua.edu.cn * updates: mirrors.tuna.tsinghua.edu.cn resolving dependencies --> running transaction check ---> package mysql-community-server.x86_64 0:5.7.37-1.el7 will be installed --> processing dependency: mysql-community-common(x86-64) = 5.7.37-1.el7 for package: mysql-community-server-5.7.37-1.el7.x86_64 --> processing dependency: mysql-community-client(x86-64) >= 5.7.9 for package: mysql-community-server-5.7.37-1.el7.x86_64 --> running transaction check ---> package mysql-community-client.x86_64 0:5.7.37-1.el7 will be installed --> processing dependency: mysql-community-libs(x86-64) >= 5.7.9 for package: mysql-community-client-5.7.37-1.el7.x86_64 ---> package mysql-community-common.x86_64 0:5.7.37-1.el7 will be installed --> running transaction check ---> package mysql-community-libs.x86_64 0:5.7.37-1.el7 will be installed --> finished dependency resolution dependencies resolved =================================================================================================================================================================================================================== package arch version repository size =================================================================================================================================================================================================================== installing: mysql-community-server x86_64 5.7.37-1.el7 mysql57-community 174 m installing for dependencies: mysql-community-client x86_64 5.7.37-1.el7 mysql57-community 25 m mysql-community-common x86_64 5.7.37-1.el7 mysql57-community 311 k mysql-community-libs x86_64 5.7.37-1.el7 mysql57-community 2.4 m transaction summary =================================================================================================================================================================================================================== install 1 package (+3 dependent packages) total download size: 202 m installed size: 878 m downloading packages: warning: /var/cache/yum/x86_64/7/mysql57-community/packages/mysql-community-common-5.7.37-1.el7.x86_64.rpm: header v4 rsa/sha256 signature, key id 3a79bd29: nokey ] 0.0 b/s | 767 kb --:--:-- eta public key for mysql-community-common-5.7.37-1.el7.x86_64.rpm is not installed (1/4): mysql-community-common-5.7.37-1.el7.x86_64.rpm | 311 kb 00:00:00 (2/4): mysql-community-libs-5.7.37-1.el7.x86_64.rpm | 2.4 mb 00:00:04 (3/4): mysql-community-client-5.7.37-1.el7.x86_64.rpm | 25 mb 00:01:01 (4/4): mysql-community-server-5.7.37-1.el7.x86_64.rpm | 174 mb 00:03:40 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- total 917 kb/s | 202 mb 00:03:45 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 : mysql57-community-release-el7-8.noarch (@/mysql57-community-release-el7-8.noarch) from : /etc/pki/rpm-gpg/rpm-gpg-key-mysql public key for mysql-community-server-5.7.37-1.el7.x86_64.rpm is not installed failing package is: mysql-community-server-5.7.37-1.el7.x86_64 gpg keys are configured as: file:///etc/pki/rpm-gpg/rpm-gpg-key-mysql
这里发现这个问题：
public key for mysql-community-server-5.7.37-1.el7.x86_64.rpm is not installed failing package is: mysql-community-server-5.7.37-1.el7.x86_64 gpg keys are configured as: file:///etc/pki/rpm-gpg/rpm-gpg-key-mysql
备注：
由于mysql在centos7中收费了，所以已经不支持mysql了，取而代之在centos7内部集成了mariadb，而安装mysql的话会和mariadb的文件冲突。
如果安装的话，需要卸载mariadb，另外也注意安装正确的安装包，以及安装顺序，建议参考我的另外一篇文章。
总结
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