So I know it builds on your server (and I could potentially just pull the rrdtool-perl rpm from your buildlogs server.)
But I still would feel better if I could build it on my own server.
config_opts['macros']['%centos_ver'] = "7"
config_opts['macros']['%rhel'] = "7"
config_opts['macros']['%el7'] = "1"
config_opts['macros']['%redhat'] = "7"
config_opts['macros']['%vendor'] = "CentOS"
config_opts['macros']['%_vendor'] = "redhat"
config_opts['macros']['%_vendor_host'] = "redhat"
config_opts['macros']['%_host'] = "x86_64-redhat-linux-gnu"