I discovered that mod_auth_mysql has been replaced with mod_auth_dbd on Centos 7 and Apache 2.4. The following is a quick reference to setting mod_auth_dbd up
<VirtualHost 10.10.10.10:80> # tell DBD you are using mysql DBDriver mysql # how to access the database that contains the usernames and passwords # host = server running the sql server. Can be ip address or FQDN # dbname = name of the database that contains the table that has the users # user = username that has at least read access to the table that has the users # pass = password of the above user DBDParams "host=localhost dbname=WebUsers user=WebUserDBAdmin pass=L3tM30ut" # Minimum number of connections DBDMin 4 # Maximum sustained number of connections DBDKeep 8 #Set the hard maximum number of connections per process DBDMax 20 # Set the time to keep idle connections alive when the number of connections specified in DBDKeep has been exceeded DBDExptime 300 <Directory /opt/MyWebSite> #sql querry that will return the password for the selected user # passwords should be stored the database using the mysql "encrypt" function AuthDBDUserPWQuery "select user_passwd from users where user_name=%s" <RequireAll> AuthType Basic AuthName "My Web Site" Require valid-user AuthBasicProvider socache dbd </RequireAll> </Directory> (other parameters as needed) </VirtualHost>
For more information, see https://httpd.apache.org/docs/2.4/de/mod/mod_dbd.htm and https://httpd.apache.org/docs/2.4/mod/mod_authn_dbd.html.