Trace Pagure connection events

Change-Id: I4f031d9ab4e1a25bc14807a4251e3fab922038c5

zuul/driver/pagure/pagureconnection.py

@@ -23,12 +23,15 @@ import requests
 import cherrypy
 import voluptuous as v
 
+from opentelemetry import trace
+
 from zuul.connection import (
     BaseConnection, ZKChangeCacheMixin, ZKBranchCacheMixin
 )
 from zuul.lib.logutil import get_annotated_logger
 from zuul.web.handler import BaseWebController
 from zuul.model import Ref, Branch, Tag
+from zuul.lib import tracing
 from zuul.lib import dependson
 from zuul.zk.branch_cache import BranchCache
 from zuul.zk.change_cache import (
@@ -118,6 +121,7 @@ class PagureEventConnector(threading.Thread):
     """Move events from Pagure into the scheduler"""
 
     log = logging.getLogger("zuul.PagureEventConnector")
+    tracer = trace.get_tracer("zuul")
 
     def __init__(self, connection):
         super(PagureEventConnector, self).__init__()
@@ -170,10 +174,17 @@ class PagureEventConnector(threading.Thread):
     def _run(self):
         while not self._stopped:
             for event in self.event_queue:
-                try:
-                    self._handleEvent(event)
-                finally:
-                    self.event_queue.ack(event)
+                event_span = tracing.restoreSpanContext(
+                    event.get("span_context"))
+                attributes = {"rel": "PagureEvent"}
+                link = trace.Link(event_span.get_span_context(),
+                                  attributes=attributes)
+                with self.tracer.start_as_current_span(
+                        "PagureEventProcessing", links=[link]):
+                    try:
+                        self._handleEvent(event)
+                    finally:
+                        self.event_queue.ack(event)
                 if self._stopped:
                     return
             self._process_event.wait(10)
@@ -826,6 +837,7 @@ class PagureConnection(ZKChangeCacheMixin, ZKBranchCacheMixin, BaseConnection):
 class PagureWebController(BaseWebController):
 
     log = logging.getLogger("zuul.PagureWebController")
+    tracer = trace.get_tracer("zuul")
 
     def __init__(self, zuul_web, connection):
         self.connection = connection
@@ -874,6 +886,7 @@ class PagureWebController(BaseWebController):
 
     @cherrypy.expose
     @cherrypy.tools.json_out(content_type='application/json; charset=utf-8')
+    @tracer.start_as_current_span("PagureEvent")
     def payload(self):
         # https://docs.pagure.org/pagure/usage/using_webhooks.html
         headers = dict()
@@ -889,7 +902,10 @@ class PagureWebController(BaseWebController):
                 "Payload origin IP address whitelisted. Skip verify")
 
         json_payload = json.loads(body.decode('utf-8'))
-        data = {'payload': json_payload}
+        data = {
+            'payload': json_payload,
+            'span_context': tracing.getSpanContext(trace.get_current_span()),
+        }
         self.event_queue.put(data)
         return data