Warden is a service discovery tool for docker + mesos.

Warden uses zookeeper to store service network data(ip address and port). Tasks launched in container would be took by warden agent and registered after pass the user-defined health check. Agent will keep watching on those containers and unregister any container failed in health check.

There are three modules in warden project.

• warden-agent - Warden agent watches on docker daemon and take created containers as ephemeral node on zookeeper. Agent do the health check periodically to guarantee all watched containers are healthy.
• warden-guardian - Warden guardian is a service running on your HAProxy/Nginx server that provide the upstream automatically, as soon as any watched app znode updated.
• warden-template - It's a commandline upstream/frontend render tool for service registration.