Manages uploaded assets (images, PDFs etc.) for applications in the GOV.UK Publishing stack.
The app receives uploaded files from publishing applications and returns the URLs that they will be made available at. Before an asset is available to the public, it is virus scanned. Once a file is found to be clean, Asset Manager serves it at the previously generated URL. Unscanned or Infected files return a 404 Not Found error.
Scanning uses ClamAV and occurs asynchronously via govuk_sidekiq.
Technical Documentation
This is a Ruby on Rails app, and should follow our Rails app conventions.
You can use the GOV.UK Docker environment to run the application and its tests with all the necessary dependencies. Follow the usage instructions to get started.
Use GOV.UK Docker to run any commands that follow.
Running the test suite
bundle exec rspec
Assets on S3
All assets are uploaded to the S3 bucket via a separate govuk_sidekiq job triggered if virus scanning succeeds. Assets are currently still also saved to the NFS mount as per the original behaviour.
In non-production environments if the AWS_S3_BUCKET_NAME environment variable is not set, then a fake version of S3 (S3Storage::Fake) is used and the other AWS_* environment variables do not need to be set. In this case, files are saved to the local filesystem instead of S3 and are served via an instance of Rack::Files mounted on the appropriate route path prefix.
Manuals and decisions
Check the docs directory for detailed instructions, including API documentation.
Viewing the Sidekiq UI
We have access to the Sidekiq UI but because Asset Manager doesn’t have a
frontend we have to use port forwarding to see it in our live environments.
You’ll need to have access to our EKS clusters before you can follow these
instructions. There’s documentation here on how to do that. This means that
you’ll need full production access before you can view the Sidekiq UI.
To view the UI run:
kubectl -n apps port-forward deployment/asset-manager 8080:8080
and then navigate to localhost:8080/sidekiq
Licence
MIT License