Production Best Practices

Health Checks, Logging, Monitoring

💡 Production, container, EK, "COMMERCIAL, AIRPLANE", jaisa, hona, CHAHIYE — REGULAR, HEALTH, CHECKS, (pre-flight, checks), CLEAR, LOGGING, (flight, recorder), aur, PROPER, MONITORING, (air, traffic, control) SAB, MILKAR, EK, SAFE, RELIABLE, FLIGHT, ensure, karte, HAIN.

HEALTHCHECK, instruction, se, Docker, PERIODICALLY, CHECK, kar, sakta, hai, ki, container, ke, ANDAR, ki, APP, ACTUALLY, HEALTHY, hai, ya, NAHI (na, ki, sirf, "RUNNING" — process, running, ho, sakta, hai, LEKIN, APP, khud, HANG, ho, sakti, hai).

PRODUCTION, containers, ko, STDOUT/STDERR, PAR, hi, LOG, karna, CHAHIYE, (files, mein, NAHI) — YE, Docker, ki, LOGGING, DRIVERS, (jaise, json-file, ya, SPECIALIZED, log, AGGREGATORS) ko, LOGS, EASILY, COLLECT, karne, DETA, hai.

# Dockerfile mein health check
HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
  CMD curl -f http://localhost:3000/health || exit 1

# Compose mein restart policy
services:
  app:
    image: myapp
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:3000/health"]
      interval: 30s
      retries: 3

docker ps   # STATUS column mein "(healthy)" dikhega

✅

Production, container, EK, "COMMERCIAL, AIRPLANE", jaisa, hona, CHAHIYE — REGULAR, HEALTH, CHECKS, (pre-flight, checks), CLEAR, LOGGING, (flight, recorder), aur, PROPER, MONITORING, (air, traffic, control) SAB, MILKAR, EK, SAFE, RELIABLE, FLIGHT, ensure, karte, HAIN.

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⚡ Quick Recap

HEALTHCHECK instruction se Docker app ki actual health verify karta hai
Logs stdout/stderr par jaane chahiye, files mein nahi (production standard)
restart: unless-stopped crash/reboot ke baad auto-restart ensure karta hai

Is page mein (2 subtopics)

Application, code, ko, SIGTERM, signal, ko, PROPERLY, HANDLE, karna, CHAHIYE — jaise, IN-FLIGHT, requests, COMPLETE, hone, dena, DATABASE, connections, CLOSE, karna, PHIR, EXIT, karna — bina, isske, "docker stop" FORCE, KILL, (SIGKILL) tak, PAHUNCH, jaata hai aur, DATA, CORRUPT, ho, sakta hai.

💡Tip: Node.js, mein, "process.on('SIGTERM', ...)" aur, Python, mein, "signal.signal(signal.SIGTERM, ...)" se, GRACEFUL, SHUTDOWN, LOGIC, likhi, ja, sakti, hai.

Docker, ke, "logging" DRIVERS, (jaise, "json-file", "syslog", "fluentd", "awslogs") se, container, logs, ko, EK, CENTRALIZED, LOGGING, SYSTEM, (jaise, ELK, Stack, ya, CloudWatch) tak, BHEJA, ja, sakta hai, taaki, MULTIPLE, containers, ke, logs, EK, hi, JAGAH, se, dekhe, ja, sakein.

docker run -d --log-driver=json-file --log-opt max-size=10m --log-opt max-file=3 myapp

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Production Best Practices

Graceful Shutdown Handling

Centralized Logging with Log Drivers