Shalom Carmel, CIO @ GlobalDots
image 2 Min read

A CDN requires an origin server, which can be a S3 bucket. s3-trigger-purge-cdn are python scripts that run as Lambda functions, and are triggered by file uploads to the bucket. Once triggered, the Lambda function will attempt to purge the old file from the CDN cache. Currently supported CDN vendors:

  • Akamai
  • Cloudflare
  • Edgecast
  • Fastly
  • Highwinds

Standalone Legacy mode

  • Edgecast
  • Akamai
  • Highwinds

While I started as a project with separate parts for each CDN vendor, the standalone parts will not be maintained anymore.


  • Python based: Easy to set up and maintain
  • Uses Lambda environment variables: Modify the environment variables to modify the Lambda behavior
  • purge or load: On Edgecast, you can decide whether to purge from the edge or load onto the edge

Environment variables

Environment variables will be loaded only at the Lambda cold start

  • debug <true|false>
  • config_file defaults to multicdn.config.yml

General Usage

  1. Install and configure Python, pip and Boto3
  2. In the project directory, run the following command: pip install -r requirements.txt -t . This is in order to be able to create a full deployable package for Lambda
  3. Update the config files. There is a master YAML file, but credentials can also be managed in the files in each vendor’s folder.
  4. Run the installation script. It will upload the function and its dependencies to AWS Lambda, as well as create the necessary roles, policies and triggers.

Additional Notes

Creating an Edgecast API key:

Adding authentication to Fastly purge:

Good luck!

Learn More

slider item
Content Delivery Network (CDN)
Francesco Altomare, Southern Europe Regional Manager @ GlobalDots 04.01.23

A Content Delivery Network (CDN) is a globally distributed network of web servers or Points of Presence (PoP) whose purpose is to provide faster content delivery. The content is replicated and stored throughout the CDN so the user can access the data that is stored at a location that is geographically closest to the user. […]

Read more
It’s time to unleash the power of the force!
Content Delivery Network (CDN) Monitoring, Logging & Observability
Admin Globaldots 12.12.22

There’s a galactic misconception that monitoring CDNs has no value and is too expensive to store and index. While that used to be true, it’s now the worst mistake an IT-jedi can make!  GlobalDots, a 20-year CDN expert, teamed with observability innovator Coralogix, to develop a next generation observability platform for monitoring Content Delivery Networks’ […]

Watch more
Top 10 Benefits of Using a Modern CDN Architecture
Content Delivery Network (CDN)
Miguel Fersen, Iberia & LATAM Regional Manager @ GlobalDots 08.12.22

The Global Content Delivery Network (CDN) market is expected to grow by $42.4 billion between now and 2032.

Read more
Unlock Your Cloud Potential
Schedule a call with our experts. Discover new technology and get recommendations to improve your performance.
Book a Demo