Sample app that uses the leaderboard: Buildris on Google Play
Update: Migrating to Go 1.16 on Google Cloud.
Google Cloud no longer supports Go 1.11 runtime, the migration guide from Google is available.
Appengine google.golang.org/appengine/* packages were removed and google cloud cloud.google.com/go/* packages have to be used instead (or Go standard library packages were applicable).
For example:
google.golang.org/appengine/datastore -> cloud.google.com/go/datastore (from Google cloud library) google.golang.org/appengine/log -> log (from Go standard library package)
Sample diff of migration for GoScores app from 1.11 to 1.16, that uses Google Cloud datastore.
To highlight other migration changes:
- Port should now be set explicitly
- Data store API was modified, for example, query.GetAll(() is now dsClient.GetAll().
- Some functions calls changed, for example RunInTransaction() no longer accepts nil for TransactionOptions. Passing nil would result in 503 Server Error and in logs: “panic serving … nil TransactionOption goroutine [running]:”
To test locally:
- Credentials should be locally available, run export with a path to the file with key:
export GOOGLE_APPLICATION_CREDENTIALS="/home/user/Downloads/service-account-file.json"
Key is available for download in Cloud Console, IAM and Admin -> Service accounts -> Keys tab. https://cloud.google.com/docs/authentication/production - go run scores.go
- check GET response on localhost:8080
To deploy:
Inside app dir call (given google-cloud-sdk directory is one level up) ../google-cloud-sdk/bin/gcloud app deploy
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Full logs of app execution and errors are available in Logs Explorer: https://console.cloud.google.com/logs
