Go packages for Google Cloud Platform services

Clone this repo:
  1. 6b59184 trace: add benchmark for SpanFromHeader by Jaana Burcu Dogan · 3 days ago master
  2. d011fb8 bigtable: fix retry test by Jonathan Amsterdam · 14 hours ago
  3. 8d2b5e0 spanner: fix function signature in doc by Andrii Zakharov · 21 hours ago
  4. ba25346 bigquery: format benchmark time in seconds by Michael Darakananda · 5 days ago
  5. d4d264c bigquery: add simple benchmarks by Michael Darakananda · 6 days ago

Google Cloud Client Libraries for Go


Go packages for Google Cloud Platform services.

import "cloud.google.com/go"

To install the packages on your system,

$ go get -u cloud.google.com/go/...

NOTE: Some of these packages are under development, and may occasionally make backwards-incompatible changes.

NOTE: Github repo is a mirror of https://code.googlesource.com/gocloud.



October 3, 2017

  • firestore: beta release. See the announcement.

  • errorreporting: The existing package has been redesigned.

  • errors: This package has been removed. Use errorreporting.

September 28, 2017


  • bigquery BREAKING CHANGES:

    • Standard SQL is the default for queries and views.
    • Table.Create takes TableMetadata as a second argument, instead of options.
    • Dataset.Create takes DatasetMetadata as a second argument.
    • DatasetMetadata field ID renamed to FullID
    • TableMetadata field ID renamed to FullID
  • Other bigquery changes:

    • The client will append a random suffix to a provided job ID if you set AddJobIDSuffix to true in a job config.
    • Listing jobs is supported.
    • Better retry logic.
  • vision, language, speech: clients are now stable

  • monitoring: client is now beta

  • profiler:

    • Rename InstanceName to Instance, ZoneName to Zone
    • Auto-detect service name and version on AppEngine.

September 8, 2017


  • bigquery: UseLegacySQL options for CreateTable and QueryConfig. Use these options to continue using Legacy SQL after the client switches its default to Standard SQL.

  • bigquery: Support for updating dataset labels.

  • bigquery: Set DatasetIterator.ProjectID to list datasets in a project other than the client's. DatasetsInProject is no longer needed and is deprecated.

  • bigtable: Fail ListInstances when any zones fail.

  • spanner: support decoding of slices of basic types (e.g. []string, []int64, etc.)

  • logging/logadmin: UpdateSink no longer creates a sink if it is missing (actually a change to the underlying service, not the client)

  • profiler: Service and ServiceVersion replace Target in Config.

August 22, 2017


  • pubsub: Subscription.Receive now uses streaming pull.

  • pubsub: add Client.TopicInProject to access topics in a different project than the client.

  • errors: renamed errorreporting. The errors package will be removed shortly.

  • datastore: improved retry behavior.

  • bigquery: support updates to dataset metadata, with etags.

  • bigquery: add etag support to Table.Update (BREAKING: etag argument added).

  • bigquery: generate all job IDs on the client.

  • storage: support bucket lifecycle configurations.

Older news

Supported APIs

Google APIStatusPackage
Video Intelligencebetacloud.google.com/go/videointelligence/apiv1beta1

Alpha status: the API is still being actively developed. As a result, it might change in backward-incompatible ways and is not recommended for production use.

Beta status: the API is largely complete, but still has outstanding features and bugs to be addressed. There may be minor backwards-incompatible changes where necessary.

Stable status: the API is mature and ready for production use. We will continue addressing bugs and feature requests.

Documentation and examples are available at https://godoc.org/cloud.google.com/go

Visit or join the google-api-go-announce group for updates on these packages.

Go Versions Supported

We support the two most recent major versions of Go. If Google App Engine uses an older version, we support that as well. You can see which versions are currently supported by looking at the lines following go: in .travis.yml.


By default, each API will use Google Application Default Credentials for authorization credentials used in calling the API endpoints. This will allow your application to run in many environments without requiring explicit configuration.

client, err := storage.NewClient(ctx)

To authorize using a JSON key file, pass option.WithServiceAccountFile to the NewClient function of the desired package. For example:

client, err := storage.NewClient(ctx, option.WithServiceAccountFile("path/to/keyfile.json"))

You can exert more control over authorization by using the golang.org/x/oauth2 package to create an oauth2.TokenSource. Then pass option.WithTokenSource to the NewClient function: snip:# (auth-ts)

tokenSource := ...
client, err := storage.NewClient(ctx, option.WithTokenSource(tokenSource))

Cloud Datastore GoDoc

Example Usage

First create a datastore.Client to use throughout your application:

client, err := datastore.NewClient(ctx, "my-project-id")
if err != nil {

Then use that client to interact with the API:

type Post struct {
	Title       string
	Body        string `datastore:",noindex"`
	PublishedAt time.Time
keys := []*datastore.Key{
	datastore.NameKey("Post", "post1", nil),
	datastore.NameKey("Post", "post2", nil),
posts := []*Post{
	{Title: "Post 1", Body: "...", PublishedAt: time.Now()},
	{Title: "Post 2", Body: "...", PublishedAt: time.Now()},
if _, err := client.PutMulti(ctx, keys, posts); err != nil {

Cloud Storage GoDoc

Example Usage

First create a storage.Client to use throughout your application:

client, err := storage.NewClient(ctx)
if err != nil {
// Read the object1 from bucket.
rc, err := client.Bucket("bucket").Object("object1").NewReader(ctx)
if err != nil {
defer rc.Close()
body, err := ioutil.ReadAll(rc)
if err != nil {

Cloud Pub/Sub GoDoc

Example Usage

First create a pubsub.Client to use throughout your application:

client, err := pubsub.NewClient(ctx, "project-id")
if err != nil {

Then use the client to publish and subscribe:

// Publish "hello world" on topic1.
topic := client.Topic("topic1")
res := topic.Publish(ctx, &pubsub.Message{
	Data: []byte("hello world"),
// The publish happens asynchronously.
// Later, you can get the result from res:
msgID, err := res.Get(ctx)
if err != nil {

// Use a callback to receive messages via subscription1.
sub := client.Subscription("subscription1")
err = sub.Receive(ctx, func(ctx context.Context, m *pubsub.Message) {
	m.Ack() // Acknowledge that we've consumed the message.
if err != nil {

Cloud BigQuery GoDoc

Example Usage

First create a bigquery.Client to use throughout your application: snip:# (bq-1)

c, err := bigquery.NewClient(ctx, "my-project-ID")
if err != nil {
	// TODO: Handle error.

Then use that client to interact with the API: snip:# (bq-2)

// Construct a query.
q := c.Query(`
    SELECT year, SUM(number)
    FROM [bigquery-public-data:usa_names.usa_1910_2013]
    WHERE name = "William"
    GROUP BY year
    ORDER BY year
// Execute the query.
it, err := q.Read(ctx)
if err != nil {
	// TODO: Handle error.
// Iterate through the results.
for {
	var values []bigquery.Value
	err := it.Next(&values)
	if err == iterator.Done {
	if err != nil {
		// TODO: Handle error.

Stackdriver Logging GoDoc

Example Usage

First create a logging.Client to use throughout your application: snip:# (logging-1)

ctx := context.Background()
client, err := logging.NewClient(ctx, "my-project")
if err != nil {
	// TODO: Handle error.

Usually, you'll want to add log entries to a buffer to be periodically flushed (automatically and asynchronously) to the Stackdriver Logging service. snip:# (logging-2)

logger := client.Logger("my-log")
logger.Log(logging.Entry{Payload: "something happened!"})

Close your client before your program exits, to flush any buffered log entries. snip:# (logging-3)

err = client.Close()
if err != nil {
	// TODO: Handle error.

Cloud Spanner GoDoc

Example Usage

First create a spanner.Client to use throughout your application:

client, err := spanner.NewClient(ctx, "projects/P/instances/I/databases/D")
if err != nil {
// Simple Reads And Writes
_, err = client.Apply(ctx, []*spanner.Mutation{
		[]string{"name", "email"},
		[]interface{}{"alice", "a@example.com"})})
if err != nil {
row, err := client.Single().ReadRow(ctx, "Users",
	spanner.Key{"alice"}, []string{"email"})
if err != nil {


Contributions are welcome. Please, see the CONTRIBUTING document for details. We‘re using Gerrit for our code reviews. Please don’t open pull requests against this repo, new pull requests will be automatically closed.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms. See Contributor Code of Conduct for more information.