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Implementing a custom aws lambda runtime using ...

Implementing a custom aws lambda runtime using Crystal

This presentation gives an introduction into the concept of function as a service. After a quick introduction into crystal it is shown how easy it is to write a custom AWS lambda runtime using the crystal programming language.

This presentation was held at the serverless munich meetup in early 2019.

Alexander Reelsen

January 22, 2019
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Transcript

  1. WHO DAT? About me ▸ Working distributed at Elastic since

    2013 ▸ Elasticsearch developer ▸ Dislikes running own infrastructure ▸ Basketball & JVM fan, husband, dad
  2. AND NOW FOR A LESSON IN... Agenda ▸ Custom AWS

    Lambda runtimes ▸ Introduction into crystal lang ▸ A crystal based runtime
  3. go

  4. JVM

  5. JIT

  6. AWS ENDPOINT CUSTOM RUNTIME GET /2018-06-01/runtime/invocation/next Lambda-Runtime-Aws-Request-Id: 123 { "body":

    "{ \"foo\": \"bar\" }", "requestContext": "{ ... }", "headers" : { ... } } AWS_LAMBDA_RUNTIME_API=localhost:12345 _HANDLER="my_handler" /bin/bootstrap
  7. AWS ENDPOINT CUSTOM RUNTIME POST /2018-06-01/runtime/invocation/123/response { "body": "{ \"foo\":

    \"bar\" }", "headers" : { ... } } AWS_LAMBDA_RUNTIME_API=localhost:12345 _HANDLER="my_handler" /bin/bootstrap
  8. AWS ENDPOINT CUSTOM RUNTIME POST /2018-06-01/runtime/invocation/123/response { "body": "{ \"foo\":

    \"bar\" }", "headers" : { ... } } HTTP OK 202 AWS_LAMBDA_RUNTIME_API=localhost:12345 _HANDLER="my_handler" /bin/bootstrap
  9. AWS ENDPOINT CUSTOM RUNTIME POST /2018-06-01/runtime/invocation/123/error { "statusCode": 500, "body"

    : "..." } AWS_LAMBDA_RUNTIME_API=localhost:12345 _HANDLER="my_handler" /bin/bootstrap
  10. AWS ENDPOINT CUSTOM RUNTIME POST /2018-06-01/runtime/init/error { "errorMessage" : "...",

    "errorType" : "..." } AWS_LAMBDA_RUNTIME_API=localhost:12345 _HANDLER="my_handler" /bin/bootstrap
  11. $$$

  12. HYPER HYPER Links ▸ https://docs.aws.amazon.com/lambda/latest/dg/runtimes-custom.html ▸ https://docs.aws.amazon.com/lambda/latest/dg/runtimes-walkthrough.html ▸ https://crystal-lang.org ▸

    https://github.com/spinscale/crystal-aws-lambda ▸ AWS Lambda Under the Hood: https://www.youtube.com/watch?v=QdzV04T_kec ▸ Firecracker: https://firecracker-microvm.github.io/ ▸ Boehm GC: http://www.hboehm.info/gc/ ▸ FaastRuby: https://faastruby.io/getting-started-crystal/ ▸ Google Cloud Functions: https://github.com/sam0x17/gcf.cr ▸ Crystal on OpenFaas: https://github.com/TPei/crystal_openfaas