源 yum install epel-release
yum grouplist
yum groupinstall "Development Libraries" "Development Tools" "X Software Development"
yum groupinstall "Legacy Software Development"
yum -y install httpd php php-devel php-gd php-imap php-ldap php-mysql php-odbc php-pear php-xml php-xmlrpc php-mbstring php-mcrypt php-mhash gettext
yum -y install pdns pdns-backend-mysql
yum install php-pear-DB php-pear-MDB2-Driver-mysql -y
yum remove mysql mysql-server -y
yum install mysql mysql-server mysql-devel -y
yum remove mysql mysql-server mysql-devel -y
yum install mysql mysql-server mysql-devel -y
yum install keepalived -y
yum clean all
yum install keepalived -y
参考如下两篇文章可正确安装 上边是本人安装时的历史命令可参考
powerdns
原文：http://www.cnblogs.com/MeFeng/p/7873363.html
