Why Ingress manages external access in Kubernetes - See It in Action

Why Ingress Manages External Access in Kubernetes

📖 Scenario: You are working with a Kubernetes cluster that runs several web applications. You want to control how users from outside the cluster can reach these applications. Kubernetes provides a way to manage this external access using a resource called Ingress.

🎯 Goal: Learn how to create a simple data structure representing services and their ports, add a configuration for an Ingress controller, apply the logic to map external paths to services, and finally display the Ingress rules that manage external access.

📋 What You'll Learn

Create a dictionary called services with exact service names and ports

Add a variable called ingress_controller with the value 'nginx'

Create a dictionary called ingress_rules that maps URL paths to service names using a for loop

Print the ingress_rules dictionary to show how Ingress manages external access

💡 Why This Matters

🌍 Real World

In real Kubernetes clusters, Ingress resources control how users from outside the cluster access internal services. This project models that mapping simply.

💼 Career

Understanding Ingress is key for DevOps roles managing Kubernetes clusters, as it helps configure secure and organized external access to applications.

1

Create the services dictionary

Create a dictionary called services with these exact entries: 'webapp': 80, 'api': 8080, 'auth': 9090.

Kubernetes

# Create the services dictionary with exact service names and ports
# Your code here

Need a hint?

Use curly braces to create a dictionary with keys as service names and values as ports.

2

Add the Ingress controller configuration

Add a variable called ingress_controller and set it to the string 'nginx'.

Kubernetes

services = {'webapp': 80, 'api': 8080, 'auth': 9090}
# Add the ingress_controller variable set to 'nginx'
# Your code here

Need a hint?

Just assign the string 'nginx' to the variable ingress_controller.

3

Create Ingress rules mapping paths to services

Create a dictionary called ingress_rules that maps these URL paths to service names: '/app' to 'webapp', '/api' to 'api', and '/login' to 'auth'. Use a for loop with variables path and service to build this dictionary from a list of tuples.

Kubernetes

services = {'webapp': 80, 'api': 8080, 'auth': 9090}
ingress_controller = 'nginx'
# Create ingress_rules dictionary using a for loop
# Your code here

Need a hint?

Create an empty dictionary, then fill it by looping over the list of path-service pairs.

4

Display the Ingress rules

Write a print statement to display the ingress_rules dictionary.

Kubernetes

services = {'webapp': 80, 'api': 8080, 'auth': 9090}
ingress_controller = 'nginx'
paths = [('/app', 'webapp'), ('/api', 'api'), ('/login', 'auth')]
ingress_rules = {}
for path, service in paths:
    ingress_rules[path] = service
# Print the ingress_rules dictionary
# Your code here

Need a hint?

Use print(ingress_rules) to show the final mapping.