fix(scheduler): show more information when there is a HTTP error in Kubernetes (#1041)

Author: helgi

rootfs/scheduler/exceptions.py

@@ -7,10 +7,14 @@ class KubeHTTPException(KubeException):
     def __init__(self, response, errmsg, *args, **kwargs):
         self.response = response
 
+        data = response.json()
+        message = data['message'] if 'message' in data else ''
+
         msg = errmsg.format(*args)
-        msg = "failed to {}: {} {}".format(
+        msg = 'failed to {}: {} {} {}'.format(
             msg,
             response.status_code,
-            response.reason
+            response.reason,
+            message
         )
         KubeException.__init__(self, msg, *args, **kwargs)