Improved hiphop service

hiphop/service.py

 from flask import Flask, redirect, request
-import requests, traceback, os
+import requests, os, logging
 from elasticapm.contrib.flask import ElasticAPM
 
 # A very boring and basic hip-hop-service to demonstrate 
-# observability via tracing.
+# observability via tracing across multiple services.
 
+service = os.environ.get('HIPHOP', 'hiphop')
 tier = int(os.environ.get('TIER', '1'))
 app = Flask(__name__)
-apm = ElasticAPM(app, 
-   service_name=os.environ.get('HIPHOP', 'hiphop'),
-)
+apm = ElasticAPM(app, service_name=service)
 
 @app.route('/')
 def index():
@@ -17,15 +16,13 @@ def index():
 
 @app.route('/hip')
 def hip():
-    print(request.headers)    
     r = ""
+    url = f"http://{service}-{tier + 1}/hip"
     try:
-        url = f"http://{service}-{tier + 1}/hip"
         r = requests.get(url)
         r = r.content.decode('utf-8')
     except Exception as ex:
-        print(ex)
-        traceback.print_exc() 
+        logging.error(f"Fetching { url } failed ({ ex })") 
         r = "END"
     
     hip = "hip " if tier == 1 else ""