s3: update documentation

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Michael Eischer committed 2024-01-07 19:30:11 +01:00
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Enhancement: Allow AWS Assume Role to be used for S3 backend
Previously only credentials discovered via the Minio Click discovery methods
would be used to authenticate. However there are many circumstances where the
discovered credentials have lower permissions and need to assume a specific role.
Previously only credentials discovered via the Minio discovery methods
were used to authenticate.
New Environment Variables:
However, there are many circumstances where the discovered credentials have
lower permissions and need to assume a specific role. This is now possible
using the following new environment variables.
- RESTIC_AWS_ASSUME_ROLE_ARN
- RESTIC_AWS_ASSUME_ROLE_SESSION_NAME
- RESTIC_AWS_ASSUME_ROLE_EXTERNAL_ID
- RESTIC_AWS_ASSUME_ROLE_REGION (if need to override from us-east-1)
- RESTIC_AWS_ASSUME_ROLE_REGION (defaults to us-east-1)
- RESTIC_AWS_ASSUME_ROLE_POLICY
- RESTIC_AWS_ASSUME_ROLE_STS_ENDPOINT
- RESTIC_AWS_ASSUME_ROLE_STS_ENDPOINT
https://github.com/restic/restic/issues/4472
https://github.com/restic/restic/pull/4474