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I have my microservice running in AWS ECS, and I want to tell which region this service is running in. Do they have a meta data service for me get my microservice region?

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There are two ways to do this. The first is to use the Metadata file. This feature is disabled by default so you'll need to turn it on. Run cat $ECS_CONTAINER_METADATA_FILE on linux after enabling it to see the metadata. The ENV var stores the file location.

The second is to use the HTTP metadata endpoint. There are two potential endpoints here (version 2 and 3) depending on how the instance is launched, so check the docs.

In either case the region is not a specific property of the metadata, but it can be inferred from the ARN.

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