To remediate the misconfiguration “Cloud CDN Global Backend Services Should Have Session Affinity” for GCP using GCP CLI, you can follow these steps:

1. Open the Cloud Shell in the GCP Console.

2. Run the following command to list all the backend services in your project:

gcloud compute backend-services list

3. Identify the backend service(s) that are used by your Cloud CDN.

4. Run the following command to update the backend service(s) and enable session affinity:

gcloud compute backend-services update [BACKEND_SERVICE_NAME] --session-affinity CLIENT_IP

Replace [BACKEND_SERVICE_NAME] with the name of the backend service you identified in step 3.

5. Verify that session affinity is enabled for the backend service(s) by running the following command:

gcloud compute backend-services describe [BACKEND_SERVICE_NAME] | grep sessionAffinity

This command should return the following output:

sessionAffinity: CLIENT_IP

This confirms that session affinity has been enabled for the backend service(s) used by your Cloud CDN.

Note: Enabling session affinity may result in increased latency and decreased availability, depending on your workload. Therefore, it is important to evaluate the impact of this change before implementing it in a production environment.

To remediate the misconfiguration “Cloud CDN Global Backend Services Should Have Session Affinity” for GCP using python, you can follow the below steps:

1. First, you need to authenticate with GCP using the below command:

from google.oauth2 import service_account
from googleapiclient.discovery import build

credentials = service_account.Credentials.from_service_account_file(
    'path/to/your/credentials.json'
)

service = build('compute', 'v1', credentials=credentials)

2. Next, you need to get the list of all global backend services using the below command:

project = 'your-project-id'
global_backend_services = service.backendServices().list(project=project).execute()

3. For each global backend service, you need to check if session affinity is enabled or not using the below command:

for service in global_backend_services['items']:
    service_name = service['name']
    service_info = service['sessionAffinitySettings']['affinityCookieTtlSec']
    if service_info == 0:
        print(f"Session affinity is not enabled for {service_name}")

4. If session affinity is not enabled for any global backend service, you can enable it using the below command:

for service in global_backend_services['items']:
    service_name = service['name']
    service_info = service['sessionAffinitySettings']['affinityCookieTtlSec']
    if service_info == 0:
        print(f"Enabling session affinity for {service_name}")
        body = {
            'sessionAffinitySettings': {
                'affinityType': 'GENERATED_COOKIE',
                'affinityCookieTtlSec': 3600
            }
        }
        service = service.backendServices().patch(
            project=project,
            backendService=service_name,
            body=body
        ).execute()

This will enable session affinity for all the global backend services which do not have it enabled.