Website Monitoring like an SRE

I have designed a monitoring strategy for your infrastructure. This plan includes external uptime checks, security header validation, and expiry tracking for your TLS certificates.

Website Monitoring Configuration

Implementation Script (Python snippet)

import requests
import ssl
import socket
from datetime import datetime

def check_tls(hostname):
    context = ssl.create_default_context()
    with socket.create_connection((hostname, 443)) as sock:
        with context.wrap_socket(sock, server_hostname=hostname) as ssock:
            cert = ssock.getpeercert()
            expiry = datetime.strptime(cert['notAfter'], '%b %d %H:%M:%S %Y %Z')
            days_left = (expiry - datetime.now()).days
            return days_left

def check_headers(url):
    resp = requests.get(url)
    required = ['Strict-Transport-Security', 'Content-Security-Policy']
    missing = [h for h in required if h not in resp.headers]
    return missing

# Logic for state management and Slack alerting would follow here

Next steps

1. Deploy this script to a GitHub Action or a dedicated monitoring VPS.
2. Connect your Slack/Telegram webhook URL to the alert handler.
3. Commit the check definitions to your repository for versioned auditing.