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The master 3DT processes, along with doing this aggregation also expose `/system/health/v1/` endpoints to feed this data by `unit` or `node` IP to the DC/OS user interface.</p></td>\n+    <td><p>This component (`dcos-3dt.service`\\`dcos-ddt.service`) is the diagnostics utility for DC/OS systemd components. This service runs on every host, tracking the internal state of the systemd unit. The service runs in two modes, with or without the `-pull` argument. If running on a master host, it executes `/opt/mesosphere/bin/3dt -pull` which queries Mesos-DNS for a list of known masters in the cluster, then queries a master (usually itself) `:5050/statesummary` and gets a list of agents.</p><p>From this complete list of cluster hosts, it queries all 3DT health endpoints (`:1050/system/health/v1/health`). This endpoint returns health state for the DC/OS systemd units on that host. The master 3DT processes, along with doing this aggregation also expose `/system/health/v1/` endpoints to feed this data by `unit` or `node` IP to the DC/OS user 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