Reference library

Observability & SRE

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

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Observability & SRE easy

Rotate Log Files by Size in Python

A mock log rotation script that renames log files exceeding a size threshold, appending numbered backups.

log-rotation pathlib file-management
Python 
import os
from pathlib import Path

def rotate_logs(directory: str, max_size: int = 100) -> None:
    """Rotate log files that exceed max_size bytes."""
    log_dir = Path(directory)
    for log_file in sorted(log_dir.glob("*.log"), key=lambda p: str(p)):
        if log_file.stat().st_size > max_size:
            for …
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Observability & SRE — Python code examples

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