Add metrics for tracking when instance key renewal succeeds and fails, as well as when instance key *lookup* fails

boot.py

@@ -6,6 +6,7 @@ from urlparse import urlunparse
 from jinja2 import Template
 from cachetools import lru_cache
 
+import logging
 import release
 import os.path
 
@@ -18,6 +19,9 @@ from util.generatepresharedkey import generate_key
 from  _init import CONF_DIR
 
 
+logger = logging.getLogger(__name__)
+
+
 @lru_cache(maxsize=1)
 def get_audience():
   audience = app.config.get('JWTPROXY_AUDIENCE')
@@ -53,12 +57,12 @@ def setup_jwt_proxy():
 
       try:
         get_service_key(quay_key_id, approved_only=False)
+        return
       except ServiceKeyDoesNotExist:
         logger.exception('Could not find non-expired existing service key %s; creating a new one',
                          quay_key_id)
 
       # Found a valid service key, so exiting.
-      return
     except IOError:
       logger.exception('Could not load existing service key; creating a new one')