Merge pull request #4053 from edx/aali/OPS-2298_monitor_cloufalre_cache_hit_rate

WIP: script to make API call to get cache hit rate

util/jenkins/cloudflare-hit-rate.py

+"""
+CloudFlare API
+https://api.cloudflare.com/#zone-analytics-dashboard
+
+"""
+import requests
+import argparse
+import sys
+
+CLOUDFLARE_API_ENDPOINT = "https://api.cloudflare.com/client/v4/"
+
+
+def calcualte_cache_hit_rate(zone_id, auth_key, email, threshold):
+    HEADERS = {"Accept": "application/json",
+               "X-Auth-Key": auth_key,
+               "X-Auth-Email": email}
+    # for the past one hour, -59 indicates minutes, we can go
+    # beyond that as well, for example for last 15
+    # hours it will be -899
+    PARAMS = {"since": "-59", "continuous": "true"}
+    res = requests.get(CLOUDFLARE_API_ENDPOINT + "zones/" + zone_id
+                       + "/analytics/dashboard", headers=HEADERS,
+                       params=PARAMS)
+    try:
+        data = res.json()
+        all_req = float(data["result"]["timeseries"][0]["requests"]["all"])
+        cached_req = float(data["result"]["timeseries"][0]["requests"]["cached"])
+        current_cache_hit_rate = cached_req / all_req * 100
+        if current_cache_hit_rate < threshold:
+            sys.exit(1)
+
+    except Exception as error:
+        print "JSON Error: {} \n Content returned from API call: {}".format(error, res.text)
+
+
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-z', '--zone', required=True,
+                        help="Cloudflare's Zone ID")
+    parser.add_argument('-k', '--auth_key', required=True,
+                        help="Authentication Key")
+    parser.add_argument('-e', '--email', required=True,
+                        help="email to use for authentication for CloudFlare API")
+    parser.add_argument('-t', '--threshold', required=True,
+                        help="Threshold limit to be passed to check against it")
+    args = parser.parse_args()
+
+    calcualte_cache_hit_rate(args.zone, args.auth_key, args.email, args.threshold)