CentOS - How do I find out which repository a package was installed from?

Question

When you use yum info to find details for a selected package, it lists the repo as "installed". That's all well and good, but for installed packages, I want to know which repository it is installed from, so that I can be sure to install any related packages from the same repository.

$: yum info mysql-server
Loaded plugins: fastestmirror
Installed Packages
Name       : mysql-server
Arch       : x86_64
Version    : 5.0.77
Release    : 4.el5_6.6
Size       : 22 M
Repo       : installed
Summary    : The MySQL server and related files.
URL        : http://www.mysql.com
License    : GPLv2 with exceptions
Description: MySQL is a multi-user, multi-threaded SQL database server. MySQL is a
           : client/server implementation consisting of a server daemon (mysqld)
           : and many different client programs and libraries. This package contains
           : the MySQL server and some accompanying files and directories.

How do I find out which repository this specific package was installed from?

Answer 1

Modern versions of YUM provide this information.

For instance, on my Fedora 15 system with YUM 3.2.29:

# yum info mysql-server
Loaded plugins: fastestmirror, langpacks, presto, refresh-packagekit
Installed Packages
Name        : mysql-server
Arch        : x86_64
Version     : 5.5.14
Release     : 2.fc15
Size        : 42 M
Repo        : installed
From repo   : updates
Summary     : The MySQL server and related files
URL         : http://www.mysql.com
License     : GPLv2 with exceptions
Description : MySQL is a multi-user, multi-threaded SQL database server. MySQL is a
            : client/server implementation consisting of a server daemon (mysqld)
            : and many different client programs and libraries. This package contains
            : the MySQL server and some accompanying files and directories.

You might see if there is a newer version of YUM that provides this information available for your system.