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Amazon Fargate now supports SOCI Index Manifest v2 for more reliable deployments

Posted on: Jul 3, 2025

Amazon ECS customers using Amazon Fargate launch mode now benefit from improved deployment reliability with SOCI Index Manifest v2 support. Seekable OCI (SOCI) accelerates Amazon ECS task launches by enabling containers to start running before the full container image is downloaded. SOCI Index Manifest v2 uses a cryptographic signature to establish an explicit link between the image and its manifest, ensuring integrity and consistency across all deployment stages.

To get started, create a SOCI index using the new convert subcommand in the soci CLI, available from the SOCI Snapshotter GitHub repository. Once generated, push the container image along with the SOCI index to your Amazon ECR repository, and use it to launch Amazon ECS tasks on Amazon Fargate.

As of today, SOCI Index Manifest v2 is the default mechanism for using SOCI with ECS and Fargate in the Amazon Web Services China (Beijing) Region, operated by Sinnet, and Amazon Web Services China (Ningxia) Region, operated by NWCD. If you're still using the legacy Manifest v1 implementation, we recommend upgrading to take advantage of the improved reliability and consistency. For more information, see the documentation on using SOCI Index Manifest v2 with Amazon ECS and Amazon Fargate.