Edge locations and CloudFront overview in AWS - Commands & Configuration

Introduction

When you want your website or app to load faster for people all over the world, you need a way to deliver content quickly no matter where they are. CloudFront uses many small data centers called edge locations close to users to speed up delivery and reduce delays.

When you want to serve images and videos quickly to users worldwide without delays

When you want to protect your website from sudden traffic spikes by caching content

When you want to reduce the load on your main server by delivering cached copies

When you want to improve user experience by lowering the time it takes to load your site

When you want to securely deliver content with encryption and access controls

Commands

This command lists all CloudFront distributions in your AWS account so you can see what content delivery setups you have.

Terminal

aws cloudfront list-distributions

Expected Output

DistributionList:

  Items:

    - Id: E1A2B3C4D5E6F7

      DomainName: d1234abcd.cloudfront.net

      Status: Deployed

      LastModifiedTime: 2024-06-01T12:00:00Z

      Enabled: true

  Quantity: 1

This command shows detailed information about a specific CloudFront distribution, including its settings and edge locations used.

Terminal

aws cloudfront get-distribution --id E1A2B3C4D5E6F7

Expected Output

Distribution:

  Id: E1A2B3C4D5E6F7

  Status: Deployed

  DomainName: d1234abcd.cloudfront.net

  DistributionConfig:

    Enabled: true

    Origins:

      Items:

        - Id: my-origin

          DomainName: myapp.example.com

    DefaultCacheBehavior:

      TargetOriginId: my-origin

      ViewerProtocolPolicy: redirect-to-https

  LastModifiedTime: 2024-06-01T12:00:00Z

→

--id - Specifies the ID of the CloudFront distribution to get details for

This command retrieves the configuration settings of the CloudFront distribution, useful for reviewing or updating cache behaviors and origins.

Terminal

aws cloudfront get-distribution-config --id E1A2B3C4D5E6F7

Expected Output

DistributionConfig:

  CallerReference: 20240601120000

  Comment: Example CloudFront distribution

  Enabled: true

  Origins:

    Items:

      - Id: my-origin

        DomainName: myapp.example.com

  DefaultCacheBehavior:

    TargetOriginId: my-origin

    ViewerProtocolPolicy: redirect-to-https

  PriceClass: PriceClass_100

→

--id - Specifies the distribution ID to get the configuration for

Key Concept

If you remember nothing else from this pattern, remember: CloudFront uses edge locations worldwide to deliver your content faster by caching it close to your users.

Common Mistakes

Trying to access CloudFront content using the origin server URL instead of the CloudFront domain name

This bypasses the edge locations and caching, causing slower delivery and more load on your origin server

Always use the CloudFront distribution domain name (like d1234abcd.cloudfront.net) to access your content

Not enabling the distribution after creating it

The distribution will not serve content until it is enabled, so users will get errors or no content

Make sure the Enabled flag is set to true when creating or updating the distribution

Summary

Use 'aws cloudfront list-distributions' to see your CloudFront setups.

Use 'aws cloudfront get-distribution' with the distribution ID to see details including edge locations.

Use 'aws cloudfront get-distribution-config' to review or update your distribution settings.

CloudFront speeds up content delivery by caching content at edge locations near users.

Always access your content through the CloudFront domain to benefit from caching and speed.