Google Cloud Functions Go
This project contains a collection of tutorials and hacks for using Go with Google Cloud Functions.
This is not an official Google product (experimental or otherwise), it is just code that happens to be owned by Google.
How it Works
Google Cloud Functions only supports node.js so shims must be used to wrap calls to Go code. The
cloud-functions-go-shim binary bridges node.js and Go functions. Each Go function to be executed must be exported from a Go plugin.
The use of Go plugins limit the runtime environment to Linux.
cloud-functions-go-shim binaries and put them in your path.
Create a Go plugin holding the function to be executed:
go build -buildmode=plugin -o functions.so examples/topic/main.go
cloud-functions-go-shim to test your function:
cat examples/topic/event.json | \ cloud-functions-go-shim -entry-point F -event-type topic -plugin-path functions.so
Testing only works on Linux; a current limitation of Go plugins.
cloud-functions-go command is used to package your function along with the necessary shims for execution in the Cloud Functions environment.
cloud-functions-go -entry-point F -event-type topic -plugin-path functions.so
The zip archive containes the following files:
- index.js - node.js shim that calls out to the
- functions.so - the Go function to be executed
- cloud-functions-go-shim - the shim between node.js and Go
Upload the zip archive and set the function to
F and the trigger to