Cache validity rules in Nginx - Mini Project: Build & Apply

Cache Validity Rules in Nginx

📖 Scenario: You are managing a web server using Nginx. To improve performance, you want to cache responses from your backend server. However, you need to control when the cached content is considered valid or stale.This project will guide you through setting up cache validity rules in Nginx configuration.

🎯 Goal: Build an Nginx configuration that sets up a cache zone and defines cache validity rules to control how long responses are cached based on HTTP status codes.

📋 What You'll Learn

Create a cache zone named my_cache with 10MB of storage

Set cache validity for HTTP status 200 to 5 minutes

Set cache validity for HTTP status 404 to 1 minute

Set cache validity for HTTP status 500 to 30 seconds

Print the final Nginx configuration snippet

💡 Why This Matters

🌍 Real World

Web servers often cache responses to speed up delivery and reduce load. Cache validity rules ensure users get fresh content when needed.

💼 Career

DevOps engineers and system administrators configure Nginx caching to optimize web performance and reliability.

1

Create a cache zone

Create a cache zone named my_cache with 10m of storage in the http block.

Nginx

# Your code here

Need a hint?

Use proxy_cache_path directive with keys_zone=my_cache:10m inside the http block.

2

Add cache validity rules

Inside the http block, add a proxy_cache_valid directive to set cache validity for HTTP status 200 to 5m.

Nginx

http {
    proxy_cache_path /tmp/cache keys_zone=my_cache:10m;
    # Your code here
}

Need a hint?

Use proxy_cache_valid 200 5m; to set cache validity for status 200.

3

Add more cache validity rules

Add proxy_cache_valid directives inside the http block to set cache validity for HTTP status 404 to 1m and for HTTP status 500 to 30s.

Nginx

http {
    proxy_cache_path /tmp/cache keys_zone=my_cache:10m;
    proxy_cache_valid 200 5m;
    # Your code here
}

Need a hint?

Add proxy_cache_valid 404 1m; and proxy_cache_valid 500 30s; inside the http block.

4

Print the final Nginx cache configuration

Print the complete http block configuration with the cache zone and all cache validity rules.

Nginx

# Your code here

Need a hint?

Use print statements to output each line of the configuration exactly as shown.