Listener rules and routing in AWS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the protocol for the listener.

AWS

listener = elbv2.Listener(self, "Listener",
    load_balancer=alb,
    port=80,
    protocol=[1],
    default_target_groups=[target_group])

Drag options to blanks, or click blank then click option'

AHTTPS

BTCP

CHTTP

DUDP

Attempts:

3 left

💡 Hint

Common Mistakes

Using HTTPS on port 80 causes connection errors.

Using TCP or UDP protocols for HTTP listeners.

The listener protocol must be set to HTTP for port 80 to handle web traffic.

2fill in blank

medium

Complete the code to add a listener rule that forwards requests with path '/images/*' to the image target group.

AWS

listener.add_action("ImageRule",
    priority=10,
    conditions=[elbv2.ListenerCondition.path_patterns([[1]])],
    action=elbv2.ListenerAction.forward([image_target_group]))

Drag options to blanks, or click blank then click option'

A"/images/*"

B"/docs/*"

C"/videos/*"

D"/api/*"

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong path pattern like '/videos/*' for images.

Forgetting the wildcard '*' to match all subpaths.

The path pattern must match /images/* to route image requests correctly.

3fill in blank

hard

Fix the error in the listener rule condition to correctly match host header 'example.com'.

AWS

listener.add_action("HostRule",
    priority=5,
    conditions=[elbv2.ListenerCondition.host_headers([[1]])],
    action=elbv2.ListenerAction.forward([host_target_group]))

Drag options to blanks, or click blank then click option'

A"example"

B"example.com"

C"*.example.com"

Dexample.com

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting quotes around the host string.

Using incomplete or incorrect host patterns.

The host header must be a string with quotes, like "example.com", to be valid.

4fill in blank

hard

Fill both blanks to create a listener rule that forwards requests with method POST and path '/submit' to the submit target group.

AWS

listener.add_action("SubmitRule",
    priority=15,
    conditions=[elbv2.ListenerCondition.http_request_methods([[1]]), elbv2.ListenerCondition.path_patterns([[2]])],
    action=elbv2.ListenerAction.forward([submit_target_group]))

Drag options to blanks, or click blank then click option'

A"POST"

B"GET"

C"/submit"

D"/home"

Attempts:

3 left

💡 Hint

Common Mistakes

Using GET instead of POST for form submissions.

Incorrect path pattern like '/home' instead of '/submit'.

The HTTP method must be "POST" and the path pattern "/submit" to route form submissions correctly.

5fill in blank

hard

Fill all three blanks to define a listener rule that forwards requests with host 'api.example.com', path '/v1/*', and method GET to the api target group.

AWS

listener.add_action("ApiRule",
    priority=20,
    conditions=[elbv2.ListenerCondition.host_headers([[1]]), elbv2.ListenerCondition.path_patterns([[2]]), elbv2.ListenerCondition.http_request_methods([[3]])],
    action=elbv2.ListenerAction.forward([api_target_group]))

Drag options to blanks, or click blank then click option'

A"api.example.com"

B"/v1/*"

C"GET"

D"POST"

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up HTTP methods or using wrong host names.

Forgetting to include wildcards in path patterns.

The host header must be "api.example.com", the path pattern "/v1/*", and the HTTP method "GET" to route API requests correctly.