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Maintenance: cn-north-1 lambda layer is not publicly available #7975
Description
Expected Behaviour
Lambda layer for power tools is publicly available in cn-north-1 region.
This was advertised as a big feature of the v3.16.0 release:
https://github.com/aws-powertools/powertools-lambda-python/releases/tag/v3.16.0
We are thrilled to announce that Powertools for AWS Lambda (Python) now offers AWS Lambda layers in the AWS China region cn-north-1.
And described here in the getting started: https://docs.aws.amazon.com/powertools/python/latest/getting-started/install/#aws-china-regions
arn:aws-cn:lambda:cn-north-1:498634801083:layer:AWSLambdaPowertoolsPythonV3-{python_version}-x86_64:27
aws --region cn-north-1 lambda get-layer-version-by-arn --arn "arn:aws-cn:lambda:cn-north-1:498634801083:layer:AWSLambdaPowertoolsPythonV3-python312-x86_64:27"
An error occurred (AccessDeniedException) when calling the GetLayerVersionByArn operation: User: REDACTED is not authorized to perform: lambda:GetLayerVersion on resource: arn:aws-cn:lambda:cn-north-1:498634801083:layer:AWSLambdaPowertoolsPythonV3-python312-x86_64:27 because no resource-based policy allows the lambda:GetLayerVersion action
By comparison, OTel in cn-north-1 works fine:
aws --region cn-north-1 lambda get-layer-version-by-arn --arn "arn:aws-cn:lambda:cn-north-1:440179912924:layer:AWSOpenTelemetryDistroPython:7"
Current Behaviour
Lambda layer for power tools is not publicly available in cn-north-1 region.
Code snippet
aws --region cn-north-1 lambda get-layer-version-by-arn --arn "arn:aws-cn:lambda:cn-north-1:498634801083:layer:AWSLambdaPowertoolsPythonV3-python312-x86_64:27"Possible Solution
Ensure the layer ARN is published publicly.
Steps to Reproduce
aws --region cn-north-1 lambda get-layer-version-by-arn --arn "arn:aws-cn:lambda:cn-north-1:498634801083:layer:AWSLambdaPowertoolsPythonV3-python312-x86_64:27"
Powertools for AWS Lambda (Python) version
27
AWS Lambda function runtime
3.12
Packaging format used
Lambda Layers
Activity
chore(ci): omit null layer metadata fields (#8416)
[-]Bug: cn-north-1 lambda layer is not publicly available[/-][+]Maintenance: `cn-north-1` lambda layer is not publicly available[/+]dreamorosi commentedon Sep 4, 2026
The latest version of the Lambda layers (v37) are now available in the
cn-north-1region at the following ARNs:arn:aws-cn:lambda:cn-north-1:498634801083:layer:AWSLambdaPowertoolsPythonV3-{python_version}-x86_64:37arn:aws-cn:lambda:cn-north-1:498634801083:layer:AWSLambdaPowertoolsPythonV3-{python_version}-arm64:37We're still working to restore our pipelines so that docs reflect the new ARNs and future releases don't drift again and this work is captured in the child issues, however the Lambda layers are already available to be attached, so I'm closing this issue as completed.
powertools-for-aws-oss-automation commentedon Sep 4, 2026
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