Hello We have developed a generic service (using python gevent) to serve as an agent check service for Haproxy. Its extensible via plugins for application feedback, and supports result cacheing, json expressions, arithmetic, regex match, and fallback in case of failure.
The source is here : https://github.com/helpshift/herald Blog post here : https://engineering.helpshift.com/2016/herald-haproxy-loadfeedback-agent/ Hope this is useful for the haproxy community. Thanks, -- Raghu
