Remove a Layer from an AWS Lambda Function

Question

Is there a way (using either the AWS CLI or some API) to programmatically remove a layer from an AWS lambda function?

That is, I know I can add or update a layer version by running something like the following

aws lambda update-function-configuration --function-name my-function-name --layer arn:aws:lambda:us-west-2:000000000:layer:layer-name:7

However, this only allows me to add or update the function's configuration. I'd like to programmatically remove the arn:aws:lambda:us-west-2:000000000:layer:layer-name:7 layer from the AWS function named my-function-name

aws lambda update-function-configuration doesn't take a single layer. There is no --layer argument, only a --layers argument that takes the full list of layers for the function. If you call this without listing the layer you want to remove, it should remove it. — Mark B
– Mark B, Commented Sep 18, 2021 at 0:40
Just call it aws lambda update-function-configuration --function-name my-function-name --layers — Marcin
– Marcin, Commented Sep 18, 2021 at 5:59
Ah, thank you both. An empty --layers option did it. Also, FWIW, the version of the AWS CLI command I have appears to alias the option --layer to --layers. Happy to accept a version of the above as the best answer if someone wants to make it an official answer. — Alana Storm
– Alana Storm, Commented Sep 18, 2021 at 19:24

Alana Storm · Accepted Answer · 2021-09-22 16:24:32Z

4

The values passed to --layers (note: not --layer, which appears to be an alias to the actual option) option replaces your entire layers configuration. This means that, by passing an empty --layers

$ aws lambda update-function-configuration --function-name my-function-name --layers

you can remove your entire layers configuration.

answered Sep 22, 2021 at 16:24

Alana Storm

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