AWS GOLANG SDK V2

Production stuff I've worked on

• Statically built Website
• Playlist generation
• Catchup TV
• Statistics pipeline
• Lots of internal tools

Lambda

• Apex deployments for lambda functions
• Apex Up for API Gateway + lambda
• Try keep functions outside lambda
• Use SNS and JSON messages for communication
• Multiaccount setup; staging and production

Track only errors:

apex --env prod logs -F error -f

Debug with sns payload

apex -ldebug --env stage invoke batch --logs < sns.json

AWS SDK v1

• AWS SDK for the Go programming language
• Golang examples by Doug-AWS
• Not idiomatic aka feels weird at times
• No AWS profile support (*without AWS_SDK_LOAD_CONFIG=1) aka swap by `vim ~/.aws/credentials`

AWS SDK v2

Bad news:

• Unstable / Preview / You gotta start using dep
• Needs more people using it and providing feedback
• Hardly anyone is using it
• CredentialsChainVerboseErrors MIA

Good news:

• sane ~/.aws/config AWS_PROFILE support
• Learning lots about (third party) API design
• Responsive developers

AWS SDK V2 on Github

Why are there (still) conversion utilities?

result, err := svc.GetObject(&s3.GetObjectInput {
   Bucket: aws.String(myBucket),
   Key: aws.String(myKey),
})

• Value and Pointer Conversion Utilities
• SDK has no knowledge whether a zero value is meaningful or not, or just unset
• Map/Slices are an exception since AWS doesn't accept sparse nil types
• Workaround: procedural mutation (setters) aren't idiomatic

Pagination

_, err := req.Send()

• List*Pages to List*Request
• Request allows for adding context
• One API per call (smaller API surface area)
• bufio inspired

Configuration

cfg, err := external.LoadDefaultAWSConfig(external.WithSharedConfigProfile("mine"))

• AWS_PROFILE support
• v1 had two ways to setup config
• Goodbye sessions!
• More types can be handled like MFA

Performance

• Marshalers instead of Reflection
• Significant memory and CPU performance improvements are claimed

and again discoverability

• Are you aware of dynamodbattribute.MarshalMap ... I wasn't!
• And the expression builder??

Check out v2

• CHANGELOG has the best summary

BONUS SCREENCAST vim-go workflow updating to v2

• https://godoc.org/github.com/aws/aws-sdk-go-v2/

Thank you