Go Reference

This subrepository holds the source for the Go playground:


# build the image
docker build -t golang/playground .


docker run --name=play --rm -p 8080:8080 golang/playground &
# run some Go code
cat /path/to/code.go | go run client.go | curl -s --upload-file - localhost:8080/compile


Deployment Triggers

Playground releases automatically triggered when new Go repository tags are pushed to GitHub, or when master is pushed on the playground repository.

For details, see deploy/go_trigger.json, deploy/playground_trigger.json, and deploy/deploy.json.

After making changes to trigger configuration, update configuration by running the following Make target:

make update-cloudbuild-trigger
Deploy via Cloud Build

The Cloud Build configuration will always build and deploy with the latest supported release of Go.

gcloud builds submit --config deploy/deploy.json .
Deploy via gcloud app deploy

Building the playground Docker container takes more than the default 10 minute time limit of cloud build, so increase its timeout first (note, app/cloud_build_timeout is a global configuration value):

gcloud config set app/cloud_build_timeout 1200  # 20 mins

Alternatively, to avoid Cloud Build and build locally:

make docker
docker tag golang/playground:latest
docker push
gcloud --project=golang-org app deploy app.yaml


gcloud --project=golang-org app deploy app.yaml


To submit changes to this repository, see

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The Go Gopher

There is no documentation for this package.


Path Synopsis
cmd/latestgo latestgo prints the latest Go release tag to stdout as a part of the playground deployment process.
internal/gcpdial Package gcpdial monitors VM instance groups to let frontends dial them directly without going through an internal load balancer.
internal/gcpdial/gcpdialtool The gcpdialtool command is an interactive validation tool for the gcpdial packge.
sandbox The sandbox program is an HTTP server that receives untrusted linux/amd64 binaries in a POST request and then executes them in a gvisor sandbox using Docker, returning the output as a response to the POST.
sandbox/sandboxtypes The sandboxtypes package contains the shared types to communicate between the different sandbox components.