tutorial: host script to simulate logs

Author: tonypowa

app/loki/web-server-logs-simulator.py

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+
+#!/bin/env python3
+
+import datetime
+import math
+import random
+import sys
+import time
+
+
+
+requests_per_second = 2
+failure_rate = 0.05
+get_post_ratio = 0.9
+get_average_duration_ms = 500
+post_average_duration_ms = 2000
+
+
+while True:
+
+    # Exponential distribution random value of average 1/lines_per_second.
+    d = random.expovariate(requests_per_second)
+    time.sleep(d)
+    if random.random() < failure_rate:
+        status = "500"
+    else:
+        status = "200"
+    if random.random() < get_post_ratio:
+        method = "GET"
+        duration_ms = math.floor(random.expovariate(1/get_average_duration_ms))
+    else:
+        method = "POST"
+        duration_ms = math.floor(random.expovariate(1/post_average_duration_ms))
+    timestamp = datetime.datetime.now(tz=datetime.timezone.utc).isoformat()
+    print(f"{timestamp} level=info method={method} url=/ status={status} duration={duration_ms}ms")
+    sys.stdout.flush()