Dockerfile should build from alpine instead of scratch

[xibz]

Hello! So my team and I are using the credential_process feature in the AWS SDK for Go, and this feature allows users to specify their own way of getting credentials through the ~/.aws/credentials file. However, the AWS SDK for Go expects sh to be present in PATH. However, scratch does not have sh. This makes the feature not usable at all with the aws-otel-collector which is a really odd experience when using AWS credentials files.

What I would love to see is either copying sh to the scratch workspace or just use alpine all together

[anuraaga]

Thanks @xibz - for various reasons we would like to stick with scratch if possible but this seems like an important use case to me. I have filed https://github.com/aws/aws-sdk-go/issues/4193 as it appears to be a gap in the SDK itself, there doesn't seem to be a reason to limit credential_process to environments that have a shell installed. If that got fixed and we updated, would that solve your issue?

[xibz]

@anuraaga Yep! That works as well!

[sethAmazon]

@anuraaga may I close this ticket?

[anuraaga]

@xibz Unfortunately I don't think we will be changing our base image just for credential_process. From the linked issue you seem to have a (too tedious) workaround for now so are you comfortable closing this in favor of the SDK issue?

[xibz]

Thanks! Went ahead and closed as the SDK should definitely address this