Skip to main content
Version: 3.26.x

Serving files from Amazon S3

imgproxy can process images from S3 buckets. To use this feature, do the following:

  1. Set the IMGPROXY_USE_S3 environment variable to be true.
  2. Set up the necessary credentials to grant access to your bucket.
  3. (optional) Specify the AWS region with IMGPROXY_S3_REGION or AWS_REGION. Default: us-west-1
  4. (optional) Specify the S3 endpoint with IMGPROXY_S3_ENDPOINT. You can also set IMGPROXY_S3_ENDPOINT_USE_PATH_STYLE=false to use the virtual host style for the endpoint.
  5. (optional) Set the IMGPROXY_S3_MULTI_REGION environment variable to be true.
  6. (optional) Set the IMGPROXY_S3_USE_DECRYPTION_CLIENT environment variable to true if your objects are client-side encrypted.
  7. (optional) Specify the AWS IAM Role to Assume with IMGPROXY_S3_ASSUME_ROLE_ARN.
  8. (optional) Specify the External ID that needs to be passed in along with the AWS IAM Role to Assume with IMGPROXY_S3_ASSUME_ROLE_EXTERNAL_ID. This will have no effect if the assume role ARN is not specified.
  9. Use s3://%bucket_name/%file_key as the source image URL.

If you need to specify the version of the source object, you can use the query string of the source URL:

s3://%bucket_name/%file_key?%version_id

Set up credentials​

There are three ways to specify your AWS credentials. The credentials need to have read rights for all of the buckets given in the source URLs:

IAM Roles​

If you're running imgproxy on an Amazon Web Services platform, you can use IAM roles to to get the security credentials to make calls to AWS S3.

Environment variables​

You can specify an AWS Access Key ID and a Secret Access Key by setting the standard AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment variables.

AWS_ACCESS_KEY_ID=my_access_key AWS_SECRET_ACCESS_KEY=my_secret_key imgproxy

# same for Docker
docker run -e AWS_ACCESS_KEY_ID=my_access_key -e AWS_SECRET_ACCESS_KEY=my_secret_key -it ghcr.io/imgproxy/imgproxy

Shared credentials file​

Alternatively, you can create the .aws/credentials file in your home directory with the following content:

[default]
aws_access_key_id = %access_key_id
aws_secret_access_key = %secret_access_key

Cross-Account Access​

S3 access credentials may be acquired by assuming a role using STS. To do so specify the IAM Role arn with the IMGPROXY_S3_ASSUME_ROLE_ARN environment variable. Additionally, if you require an external ID to be passed when assuming a role, specify the IMGPROXY_S3_ASSUME_ROLE_EXTERNAL_ID environment variable. This approach still requires you to provide initial AWS credentials by using one of the ways described above. The provided credentials role should allow assuming the role with provided ARN.

Multi-Region mode​

By default, imgproxy allows using S3 buckets located in a single region specified with IMGPROXY_S3_REGION or AWS_REGION. If your buckets are located in different regions, set IMGPROXY_S3_MULTI_REGION environment variable to be true to enable multi-region mode. In this mode, imgproxy will make an additional request to determine the bucket's region when the bucket is accessed for the first time.

In this mode, imgroxy uses a region specified with IMGPROXY_S3_REGION or AWS_REGION to determine the endpoint to which it should send the bucket's region determination request. Thus, it's a good idea to use one of these variables to specify a region closest to the imgproxy instance.

MinIO​

MinIO is an object storage server released under Apache License v2.0. It is compatible with Amazon S3, so it can be used with imgproxy.

To use MinIO as source images provider, do the following:

  • Set up Amazon S3 support as usual using environment variables or a shared config file.
  • Specify an endpoint with IMGPROXY_S3_ENDPOINT. Use the http://... endpoint to disable SSL.