Added log message to check compose file

Signed-off-by: Zuhayr Elahi <[email protected]>

compose/service.py

@@ -623,6 +623,10 @@ class Service(object):
         try:
             container.start()
         except APIError as ex:
+            if "driver failed programming external connectivity" in ex.explanation:
+                log.warn(
+                    "Port is already in use, check the docker-compose file to see if the same" +
+                    " port was allocated to multiple services")
             raise OperationFailedError("Cannot start service %s: %s" % (self.name, ex.explanation))
         return container