Add script to convert Tirex tilestat JSON to Icinga/Nagios perf data

Author: Nakaner

ansible/roles/tileserver_step2/files/monitoring/tirex/check_tirex_tilestats.py

@@ -0,0 +1,63 @@
+#! /usr/bin/env python3
+
+"""Fetch daily generated data from tirex-tiledir-check.
+"""
+
+import argparse
+from enum import Enum
+import json
+import os
+import sys
+
+
+class ServiceStatus(Enum):
+    OK = 0
+    WARNING = 1
+    CRITICAL = 2
+    UNKNOWN = 3
+
+
+def respond(status, message, measurements):
+    if not measurements:
+        line = "{}: {}\n".format(status.name, message)
+    else:
+        line = "{}: {} | {}\n".format(status.name, message, measurements)
+    print(line)
+    sys.exit(status.value)
+
+
+def get_data(path):
+    with open(path, "r") as f:
+        json_data = json.load(f)
+    return json_data
+
+
+def format_measurement(k, v):
+    return "'{}'={}".format(k, v)
+
+
+def join_values(measurements):
+    parts = []
+    for m in measurements:
+        parts.append(format_measurement(m[0], m[1]))
+    return " ".join(parts)
+
+
+parser = argparse.ArgumentParser(description="Monitoring plugin for tirex-tiledir-check results. This plugin reads the generated stats and supplies them to Icinga. It does not validate or check the retrieved numbers.")
+parser.add_argument("-s", "--style", type=str, help="Style", required=True)
+parser.add_argument("-d", "--dir", type=str, help="Path where the JOSN files generated by the nightly job are located.")
+args = parser.parse_args()
+
+json_path = os.path.join(args.dir, "tiles-{}.stats".format(args.style))
+data = get_data(json_path)
+result = []
+try:
+    for style, style_data in data.items():
+        if style != args.style:
+            respond(ServiceStatus.UNKNOWN, "Wrong style {} found in {}".format(style, json_path))
+        for zoom in range(len(style_data)):
+            result.append(("{}_{:02d}_count".format(style, zoom), style_data[zoom]["count"]))
+            result.append(("{}_{:02d}_sumsize".format(style, zoom), style_data[zoom]["sumsize"]))
+    respond(ServiceStatus.OK, "Tirex tile cache stats for style {}".format(args.style), join_values(result))
+except KeyError as e:
+    respond(ServiceStatus.UNKNOWN, "Could not parse JSON data: {}".format(e))

ansible/roles/tileserver_step2/tasks/main.yml

@@ -380,6 +380,7 @@
   loop:
     - 'monitoring/mod-tile/check_mod_tile.py'
     - 'monitoring/tirex/check_tirex.py'
+    - 'monitoring/tirex/check_tirex_tilestats.py'
 
 - debug: # noqa unnamed-task
     msg: 'Tirex is ready to render tiles now. Please start bulk-rendering of tiles on zoom levels 0 to 12 using the following command:\ntirex-batch --prio 15 map=standard,maxspeed,signals z=0-12 bbox=-180,-80,180,80'