Centos 7 Postfix 安裝使用 MYSQL 5.7 取代了 mariadb

很抱歉打擾您，但我有一個問題，我似乎無法解決。

我正在嘗試在需要移動到更多空間/記憶體的新伺服器上安裝 Postfix，舊伺服器有 256MB 的 RAM，而且很舊。

我對此很陌生，今天/晚上的大部分時間都在試圖弄清楚如何讓它發揮作用。舊伺服器MYSQL 5.5.36認為如果我們更改MariaDB並選擇升級到MYSQL 5.7.18新伺服器可能會出現意外問題。我們真的沒有專門的開發運營團隊，所以我不能聽從他們的意見。

這是我的錯誤：

   yum install postfix
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.seas.harvard.edu
* epel: epel.mirror.constant.com
* extras: ftp.osuosl.org
* updates: mirror.trouble-free.net
* webtatic: us-east.repo.webtatic.com
Resolving Dependencies
--> Running transaction check
---> Package postfix.x86_64 2:2.10.1-6.el7 will be installed
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package: 2:postfix-2.10.1-6.el7.x86_64
Package 1:mariadb-libs-5.5.52-1.el7.x86_64 is obsoleted by mysql-community-libs-compat-5.7.18-1.el5.x86_64 which is already installed
--> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 2:postfix-2.10.1-6.el7.x86_64
Package 1:mariadb-libs-5.5.52-1.el7.x86_64 is obsoleted by mysql-community-libs-compat-5.7.18-1.el5.x86_64 which is already installed
--> Finished Dependency Resolution
Error: Package: 2:postfix-2.10.1-6.el7.x86_64 (base)
          Requires: libmysqlclient.so.18()(64bit)
          Available: 1:mariadb-libs-5.5.52-1.el7.x86_64 (base)
              libmysqlclient.so.18()(64bit)
Error: Package: 2:postfix-2.10.1-6.el7.x86_64 (base)
          Requires: libmysqlclient.so.18(libmysqlclient_18)(64bit)
          Available: 1:mariadb-libs-5.5.52-1.el7.x86_64 (base)
              libmysqlclient.so.18(libmysqlclient_18)(64bit)
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest


# yum install postfix --skip-broken
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: linux.cc.lehigh.edu
* epel: epel.mirror.constant.com
* extras: ftp.osuosl.org
* updates: mirror.solarvps.com
* webtatic: us-east.repo.webtatic.com
Resolving Dependencies
--> Running transaction check
---> Package postfix.x86_64 2:2.10.1-6.el7 will be installed
--> Processing Dependency: libmysqlclient.so.18(libmysqlclient_18)(64bit) for package: 2:postfix-2.10.1-6.el7.x86_64
Package 1:mariadb-libs-5.5.52-1.el7.x86_64 is obsoleted by mysql-community-libs-compat-5.7.18-1.el5.x86_64 which is already installed
--> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 2:postfix-2.10.1-6.el7.x86_64
Package 1:mariadb-libs-5.5.52-1.el7.x86_64 is obsoleted by mysql-community-libs-compat-5.7.18-1.el5.x86_64 which is already installed

Packages skipped because of dependency problems:
   2:postfix-2.10.1-6.el7.x86_64 from base

顯然我可以看到這些庫mariadb-libs已經過時了mysql-community，但我已經完全刪除了？瑪麗亞數據庫

yum remove mariadb-libs
Loaded plugins: fastestmirror
No Match for argument: mariadb-libs
No Packages marked for removal

無論如何，我可以解決這個問題：

• 安裝 Postfix 並繼續
• 也許換成 Mariadb（我們這裡有 PROD 數據，這會導致問題）
• 也許降級到 MYSQL 5.5（真的不想這樣做，因為向後退並不理想）。

任何幫助將非常感激。使用者目前無法從應用程序接收密碼重置電子郵件。

提前致謝。

問題是您正在嘗試安裝 mysql-community-libs-compat-5.7.18-1。el5在 el7 系統上。您需要使用 el7 的包來獲取正確的 libmysqlclient.so.18 庫。

（答案已更新，我剛剛意識到您使用了錯誤的軟體包版本）

引用自：https://serverfault.com/questions/862138