Small changes to S3 repo docs #3350
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- Mention EC2 instance roles as well as ECS roles and K8s service accounts. - Mention reliability of S3-compatible storage as well as consistency & performance.
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shainaraskas
approved these changes
Oct 6, 2025
Co-authored-by: shainaraskas <58563081+shainaraskas@users.noreply.github.com>
3kt
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Oct 7, 2025
| By default {{es}} communicates with your storage system using HTTPS, and validates the repository’s certificate chain using the JVM-wide truststore. Ensure that the JVM-wide truststore includes an entry for your repository. If you wish to use unsecured HTTP communication instead of HTTPS, set `s3.client.CLIENT_NAME.protocol` to `http`. | ||
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| There are many systems, including some from very well-known storage vendors, which claim to offer an S3-compatible API despite failing to emulate S3’s behavior in full. If you are using such a system for your snapshots, consider using a [shared filesystem repository](shared-file-system-repository.md) based on a standardized protocol such as NFS to access your storage system instead. The `s3` repository type requires full compatibility with S3. In particular it must support the same set of API endpoints, with the same parameters, return the same errors in case of failures, and offer consistency and performance at least as good as S3 even when accessed concurrently by multiple nodes. You will need to work with the supplier of your storage system to address any incompatibilities you encounter. Don't report {{es}} issues involving storage systems which claim to be S3-compatible unless you can demonstrate that the same issue exists when using a genuine AWS S3 repository. | ||
| There are many systems, including some from very well-known storage vendors, which claim to offer an S3-compatible API despite failing to emulate S3’s behavior in full. If you are using such a system for your snapshots, consider using a [shared filesystem repository](shared-file-system-repository.md) based on a standardized protocol such as NFS to access your storage system instead. The `s3` repository type requires full compatibility with S3. In particular it must support the same set of API endpoints, with the same parameters, return the same errors in case of failures, and offer consistency, performance, and reliability at least as good as S3 even when accessed concurrently by multiple nodes. You will need to work with the supplier of your storage system to address any incompatibilities you encounter. Don't report {{es}} issues involving storage systems which claim to be S3-compatible unless you can demonstrate that the same issue exists when using a genuine AWS S3 repository. |
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@DaveCTurner shouldn't this be checked by the verify repo API call?
Said differently, can a customer be 100% certain that their system will be ok as long as the API call gives the green light.
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No, as per the docs you linked the verify repo API call is just there to ...
Check for common misconfigurations in a snapshot repository
No certainty here.
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Mention EC2 instance roles as well as ECS roles and K8s service accounts.
Mention reliability of S3-compatible storage as well as consistency & performance.