aws-lambda

Convert JPEG images from S3 bucket to BMP, GIF, PNG into another bucket

Setup two buckets

• jpeg-images for source jpeg images
• converted-jpeg-images for converted jpeg images

Setup lambda

• Create Go 1.x lambda function with S3 trigger (jpeg-images)
• Build go executable

cd ./function
GOOS=linux go build -o converter-function main.go

• Make zip from converter-function executable and upload to AWS lambda

• Setup Runtime settings to invoke go executable

• Add env variables to use S3 credentials for you IAM role: AccessKeyID, AccessKeySecret

  

Result lambda scheme:

Test

Upload jpg image to jpeg-images bucket

jpeg-images

converted-jpeg-images after couple of seconds

and check CloudWatch logs