Unreliable deployment

[sterliakov]

This action releases a code version and immediately updates an alias to point to that version. This is never the desired outcome: new version takes some time to become available. This can result in failures similar to this one.

AWS CLI supports checks to facilitate preventing such premature deployments: lambda wait function-updated-v2 and lambda wait function-active-v2. This should be also doable via JS SDK.

Here's an AWS CLI version that prevents deploying unavailable functions:

set -euo pipefail
version=$(
    aws lambda update-function-code --publish \
    --function-name "$function" \
    --image-uri "$image" \
    | jq -r '.Version'
)
aws lambda wait function-updated-v2 --function-name "$function"
aws lambda wait function-active-v2 --function-name "$function"
aws lambda update-alias \
    --name "$alias_name" \
    --function-name "$function" \
    --function-version "$version"