Log format customization in Nginx - Mini Project: Build & Apply

Log Format Customization in Nginx

📖 Scenario: You are managing a web server using Nginx. You want to customize the log format to include specific details about each request for better monitoring and troubleshooting.

🎯 Goal: Learn how to create a custom log format in Nginx and apply it to the access logs.

📋 What You'll Learn

Create a custom log format named custom_format with specific fields

Set a variable for the log file path

Apply the custom log format to the access log directive

Print the final access log configuration line

💡 Why This Matters

🌍 Real World

Customizing log formats helps system administrators and DevOps engineers monitor web traffic and troubleshoot issues effectively by capturing exactly the information they need.

💼 Career

Understanding how to customize and manage Nginx logs is a key skill for roles like DevOps engineer, system administrator, and site reliability engineer.

1

Create a custom log format

Write a log_format directive named custom_format that logs the client IP ($remote_addr), the request time ($time_local), the request method ($request_method), the requested URI ($request_uri), the response status ($status), and the body bytes sent ($body_bytes_sent).

Nginx

# Define a custom log format named custom_format
# Your code here

Need a hint?

Use the log_format directive with the name custom_format and include the variables exactly as shown.

2

Set the access log file path variable

Create a variable called access_log_path and set it to the string "/var/log/nginx/access_custom.log".

Nginx

log_format custom_format '$remote_addr - [$time_local] "$request_method $request_uri" $status $body_bytes_sent';
# Set the access_log_path variable
# Your code here

Need a hint?

Use the set directive to assign the log file path to the variable $access_log_path.

3

Apply the custom log format to the access log

Write an access_log directive that uses the variable $access_log_path as the log file path and the custom_format as the log format.

Nginx

log_format custom_format '$remote_addr - [$time_local] "$request_method $request_uri" $status $body_bytes_sent';
set $access_log_path "/var/log/nginx/access_custom.log";
# Configure access_log to use custom_format and $access_log_path
# Your code here

Need a hint?

Use the access_log directive with the variable $access_log_path and the format name custom_format.

4

Display the final access log configuration

Write a print statement that outputs the exact string: access_log /var/log/nginx/access_custom.log custom_format;

Nginx

log_format custom_format '$remote_addr - [$time_local] "$request_method $request_uri" $status $body_bytes_sent';
set $access_log_path "/var/log/nginx/access_custom.log";
access_log $access_log_path custom_format;
# Print the final access_log configuration line
# Your code here

Need a hint?

Use print with the exact string including the semicolon.