user: A registered janitor.technology user that wishes to contribute to a software project supported by Janitor (e.g. Firefox)
janitor: The main janitor.technology web app & server, which orchestrates Docker image updates across all Docker hosts, and allows signed-in users to create and manage developer containers.
moz1: A Docker host that serves Docker Remote API (TLS with Janitor) and that authenticates users with a transparent OAuth2 round-trip with Janitor (in order to verify container ownership and proxy container ports over HTTPS).
moz1 (proxy): A Janitor host-level proxy server (join.js), responsible for automatically initializing/configuring a host, and registering it to the Janitor cluster. The proxy server is also responsible for authenticating web users, and routing their requests to their container ports (see diagram Using Janitor).
moz1 (docker): The Docker daemon on a Docker server, serving the Docker Remote API via TLS, allowing the Janitor main server to trigger Docker image pulls, and create/configure/delete containers on behalf of users.