Reference library

Observability & SRE

Structured logging, metrics, tracing, health checks, and SLO-friendly instrumentation.

4 matches

Export Metrics with OTLP Mock in Python

Simulates system metric collection and exports them as an OTLP-like JSON payload using only Python's standard library.

from dataclasses import dataclass, asdict
import json
import random
import time


@dataclass
class Metric:
    name: str
    value: float
    timestamp: int
    unit: str = "1"


def collect_system_metrics() -> list[Metric]:
    """Mock metric collection for OTLP export simulation."""
    now = int(time.time())
    re…

12 0 Open

Observability & SRE medium

How to Build a Python Latency Histogram with Mock Buckets

This code implements a mock latency histogram that records request durations into configurable buckets and outputs counts, total, and average latency.

histogram latency metrics

Python

import time
import random
from collections import Counter


class LatencyHistogram:
    def __init__(self, buckets):
        self.buckets = sorted(buckets)
        self.counts = Counter()
        self.total = 0
        self.sum_latency = 0

    def record(self, latency_ms):
        for i, boundary in enumerate(self.bu…

13 0 Open

Observability & SRE medium

How to Build an HTTP Server Request Duration Histogram in Python

Create a small HTTP server that times each GET request, buckets the duration, and prints a histogram on shutdown.

http.server histogram performance

Python

import time
import random
from collections import Counter
from http.server import HTTPServer, BaseHTTPRequestHandler


class HistogramHandler(BaseHTTPRequestHandler):
    response_times = Counter()

    def do_GET(self):
        start = time.perf_counter()
        time.sleep(random.uniform(0.001, 0.1))
        duratio…

13 0 Open

Observability & SRE medium

How to Create a StatsD UDP Metric Mock Server in Python

Run a lightweight mock UDP server that captures StatsD metrics over a short window for local testing.

statsd udp sockets

Python

import socket
import threading
import time


def start_mock_statsd_server(host="127.0.0.1", port=8125, timeout=3):
    """Run a mock StatsD UDP server that captures metrics for a short window."""
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.bind((host, port))
    sock.settimeout(timeout)
    me…

13 0 Open

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