Per-service metrics http server

* Organize metrics into their respective service
* Server per-service metrics on a per-service http server
* Increase prometheus client usage over our custom metrics fields

awx/settings/defaults.py

@@ -1076,6 +1076,35 @@ HOST_METRIC_SUMMARY_TASK_LAST_TS = None
 HOST_METRIC_SUMMARY_TASK_INTERVAL = 7  # days
 
 
+# TODO: cmeyers, replace with with register pattern
+# The register pattern is particularly nice for this because we need
+# to know the process to start the thread that will be the server.
+# The registration location should be the same location as we would
+# call MetricsServer.start()
+# Note: if we don't get to this TODO, then at least create constants
+# for the services strings below.
+# TODO: cmeyers, break this out into a separate django app so other
+# projects can take advantage.
+
+METRICS_SERVICE_CALLBACK_RECEIVER = 'callback_receiver'
+METRICS_SERVICE_DISPATCHER = 'dispatcher'
+METRICS_SERVICE_WEBSOCKETS = 'websockets'
+
+METRICS_SUBSYSTEM_CONFIG = {
+    'server': {
+        METRICS_SERVICE_CALLBACK_RECEIVER: {
+            'port': 8014,
+        },
+        METRICS_SERVICE_DISPATCHER: {
+            'port': 8015,
+        },
+        METRICS_SERVICE_WEBSOCKETS: {
+            'port': 8016,
+        },
+    }
+}
+
+
 # django-ansible-base
 ANSIBLE_BASE_TEAM_MODEL = 'main.Team'
 ANSIBLE_BASE_ORGANIZATION_MODEL = 'main.Organization'