Set up a backend bucket as an origin for Cloud CDN

Create a Cloud Storage bucket

Buckets are the basic containers that hold your data in Cloud Storage.

To create a bucket, follow these steps:

1. In the Google Cloud console, go to the Cloud Storage Buckets page.
   

   Go to Buckets

2. Click add_box Create. Show me.

3. In the Name your bucket section, enter a unique name for your bucket.

   Click Continue.

4. In the Choose where to store your data section, do the following:
   1. For Location type, select Region, and then select us-east1 (South Carolina) from the list.
   2. Click Continue.
5. In the Choose a storage class for your data section, do the following:
   1. Select Set a default class, and then select Standard.
   2. Click Continue.
6. In the Choose how to control access to objects section, do the following:
   • Clear the Enforce public access prevention on this bucket checkbox.
   • For Access control, select Uniform.
   • Click Continue.
7. In the Choose how to protect object data section, keep the selected defaults, and then click Create .

Upload an object into the bucket

1. Save the following image on your device:

   
2. On the Bucket details page, on the Objects tab, click Upload files .
3. In the file dialog, select the file that you downloaded.

Make your bucket public

1. On the Bucket details page, click the Permissions tab.

2. Ensure that the view is set to View by principals , and then click Grant access .

   The Add principals pane is displayed.

3. In the New principals field, enter allUsers.
4. In the Select a role list, select Cloud Storage > Storage Object Viewer.
5. Click Save.
6. On the Are you sure you want to make this resource public? page, click Allow public access.
7. To verify that the object has been shared publicly, click the Objects tab to return to the list of objects. Your object's Public access column should read Public to internet. The Copy URL button provides a shareable URL similar to the following:

   https://storage.googleapis.com/YOUR_BUCKET_NAME/kitten.png

Create a backend bucket

To create a backend bucket and an external Application Load Balancer, do the following:

1. In the Google Cloud console, go to the Cloud CDN page.

   Go to Cloud CDN

2. Click Add origin .

3. On the New origin page, in the Origin name section, enter a name for your origin.

4. For Origin type , select Backend bucket.

5. For Define your backend bucket , select New backend bucket.

6. In the Cloud Storage bucket field, click Browse.

7. Select the Cloud Storage bucket that you created earlier, click Select, and then click Next.

8. In the Attach a load balancer section, select Create new load balancer for me, enter a name for the load balancer, and then click Next.

9. For Cache performance, keep the selected defaults, and then click Done .

   The new origin appears in the list of origins. It might take a few minutes for the origin to be fully created. Proceed to the next step only after you see a notification indicating that the origin has been created.

Test Cloud CDN

1. In the Google Cloud console, go to the Load balancing page.

   Go to Load balancing

2. Click the name of the load balancer that you created earlier.

   The Load balancer details page is displayed.

3. Note the IPv4 addresses displayed under IP:Port .

4. Test Cloud CDN by entering the following URL with the load balancer's IP address in a new browser tab:

   http://IP_ADDRESS/kitten.png
   

   Your browser should render a page with the uploaded image.

5. Refresh the page multiple times.

6. Return to the Load balancer details page, and then click Monitoring.

7. After a few minutes, observe the served traffic.

   Traffic that is served directly from your backend bucket is labeled SERVED_FROM_BACKEND_BUCKET. Traffic that is served from Cloud CDN is labeled SERVED_FROM_CACHE. For more information, see Monitoring metrics.