http://www.jackxiang.com/index.php zh-cn http://www.jackxiang.com/post// jack <xdy108@126.com> Tue, 05 Dec 2017 08:07:23 +0000 http://www.jackxiang.com/post// 根本原因是之前的CentOS6.X里默认安装了mysql-libs，而在CentOS的7.x里，先安装了自己制作的Mysql包，于是出现：
1）CentOS6.X里需要：
rpm -q perl-DBD-MySQL --requires|grep libmysqlclient
libmysqlclient.so.16()(64bit)  
libmysqlclient.so.16(libmysqlclient_16)(64bit)  
2）CentOS7.X里需要：
rpm -q perl-DBD-MySQL --requires|grep libmysqlclient
libmysqlclient.so.18()(64bit)
libmysqlclient.so.18(libmysqlclient_18)(64bit)

而这两个不同版本的MySQL自制的包均分别提供了libmysqlclient.so.16@CentOS6.X和libmysqlclient.so.18@CentOS7.X（7里叫：mariadb-libs），且加入到动态链接库的cat /etc/ld.so.conf.d/mysql.conf,
/usr/local/mysql/lib,并ldconfig生效了，于是这个perl-DBD-MySQL就和它建立起了依赖，导致卸载Mysql@CentOS7.x时，因为perl-DBD-MySQL依赖mysql的libmysqlclient.so.18,于是出现被一同卸载的情况。怎么办@CentOS7.X里装perl-DBD-MySQL,先卸载Mysql一并把perl-DBD-MySQL卸载了，yum remove mysql -y，然后,yumdownloader mysql-libs,它会下载：mariadb-libs-5.5.56-2.el7.x86_64.rpm，rpm -ihv mariadb-libs-5.5.56-2.el7.x86_64.rpm，以解决直接yum install perl-DBD-MySQL时会出现安装：mysql-5.7.12-171123111505的情况,装好后，再安装yum install perl-DBD-MySQL ，也就不会安装mysql-5.7.12-171123111505了，因为链接已经在mariadb-libs-5.5.56有了，不需要mysql-5.7.12-171123111505来补充了。

一）CentOS7上安装perl-DBD-MySQL:
[root@ha_mysql-mha_manager_bj_szq_10_70_36_177 ~]# yum remove mysql
Loaded plugins: langpacks
Resolving Dependencies
--> Running transaction check
---> Package mysql.x86_64 0:5.7.12-171123111505.el7.centos will be erased
--> Processing Dependency: libmysqlclient.so.18()(64bit) for package: perl-DBD-MySQL-4.023-5.el7.x86_64
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package: perl-DBD-MySQL-4.023-5.el7.x86_64
--> Running transaction check
---> Package perl-DBD-MySQL.x86_64 0:4.023-5.el7 will be erased
--> Finished Dependency Resolution

libmysqlclient.so.18被perl-DBD-MySQL需要：
ls -lart /usr/local/mysql/lib/libmysqlclient.so.18
/usr/local/mysql/lib/libmysqlclient.so.18 -> /usr/local/mysql/lib/libmysqlclient.so.18.1.0
rpm -qf /usr/local/mysql/lib/libmysqlclient.so.18.1.0
mysql-5.7.12-171123111505.el7.centos.x86_64

ldconfig -p|grep libmysqlclient.so.18
        libmysqlclient.so.18 (libc6,x86-64) => /usr/local/mysql/lib/libmysqlclient.so.18

验证，如果没有咱自己打的包的情况，理论上perl-DBD-MySQL也是和CentOS6.x一样需要这个mysql-libs的：
yumdownloader mysql-libs
rpm -qpl  mariadb-libs-5.5.56-2.el7.x86_64.rpm|grep libmysqlclient.so
/usr/lib64/mysql/libmysqlclient.so.18            #得证！！
/usr/lib64/mysql/libmysqlclient.so.18.0.0  


二）CentOS6.x Ver:
ldconfig -p|grep libmysqlclient.so
        libmysqlclient.so.16 (libc6,x86-64) => /usr/lib64/mysql/libmysqlclient.so.16
rpm -qf /usr/lib64/mysql/libmysqlclient.so.16
mysql-libs-5.1.73-7.el6.x86_64

[root@ha_mysql-mha-manager_bj_sjs_10_71_182_246 ~]验证依赖：
yum remove mysql-libs
perl-DBD-MySQL  x86_64  4.013-3.el6  @CentOS-Base ]]> http://www.jackxiang.com/post//#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://www.jackxiang.com/post//#blogcomment