go: cloud.google.com/go Index | Examples | Files | Directories

package cloud

import "cloud.google.com/go"

Package cloud is the root of the packages used to access Google Cloud Services. See https://godoc.org/cloud.google.com/go for a full list of sub-packages.

Client Options

All clients in sub-packages are configurable via client options. These options are described here: https://godoc.org/google.golang.org/api/option.

Authentication and Authorization

All the clients in sub-packages support authentication via Google Application Default Credentials (see https://cloud.google.com/docs/authentication/production), or by providing a JSON key file for a Service Account. See the authentication examples in this package for details.

Timeouts and Cancellation

By default, all requests in sub-packages will run indefinitely, retrying on transient errors when correctness allows. To set timeouts or arrange for cancellation, use contexts. See the examples for details.

Do not attempt to control the initial connection (dialing) of a service by setting a timeout on the context passed to NewClient. Dialing is non-blocking, so timeouts would be ineffective and would only interfere with credential refreshing, which uses the same context.

Connection Pooling

Connection pooling differs in clients based on their transport. Cloud clients either rely on HTTP or gRPC transports to communicate with Google Cloud.

Cloud clients that use HTTP (bigquery, compute, storage, and translate) rely on the underlying HTTP transport to cache connections for later re-use. These are cached to the default http.MaxIdleConns and http.MaxIdleConnsPerHost settings in http.DefaultTransport.

For gPRC clients (all others in this repo), connection pooling is configurable. Users of cloud client libraries may specify option.WithGRPCConnectionPool(n) as a client option to NewClient calls. This configures the underlying gRPC connections to be pooled and addressed in a round robin fashion.

Using the Libraries with Docker

Minimal docker images like Alpine lack CA certificates. This causes RPCs to appear to hang, because gRPC retries indefinitely. See https://github.com/GoogleCloudPlatform/google-cloud-go/issues/928 for more information.

Debugging

To see gRPC logs, set the environment variable GRPC_GO_LOG_SEVERITY_LEVEL. See https://godoc.org/google.golang.org/grpc/grpclog for more information.

For HTTP logging, set the GODEBUG environment variable to "http2debug=1" or "http2debug=2".

Google Application Default Credentials is the recommended way to authorize and authenticate clients.

For information on how to create and obtain Application Default Credentials, see https://developers.google.com/identity/protocols/application-default-credentials.

Code:

client, err := datastore.NewClient(context.Background(), "project-id")
if err != nil {
    // TODO: handle error.
}
_ = client // Use the client.

To arrange for an RPC to be canceled, use context.WithCancel.

Code:

ctx := context.Background()
// Do not cancel the context passed to NewClient: dialing happens asynchronously,
// and the context is used to refresh credentials in the background.
client, err := bigquery.NewClient(ctx, "project-id")
if err != nil {
    // TODO: handle error.
}
cctx, cancel := context.WithCancel(ctx)
defer cancel() // Always call cancel.

// TODO: Make the cancel function available to whatever might want to cancel the
// call--perhaps a GUI button.
if err := client.Dataset("new-dataset").Create(cctx, nil); err != nil {
    // TODO: handle error.
}

You can use a file with credentials to authenticate and authorize, such as a JSON key file associated with a Google service account. Service Account keys can be created and downloaded from https://console.developers.google.com/permissions/serviceaccounts.

This example uses the Datastore client, but the same steps apply to the other client libraries underneath this package.

Code:

client, err := datastore.NewClient(context.Background(),
    "project-id", option.WithCredentialsFile("/path/to/service-account-key.json"))
if err != nil {
    // TODO: handle error.
}
_ = client // Use the client.

In some cases (for instance, you don't want to store secrets on disk), you can create credentials from in-memory JSON and use the WithCredentials option.

The google package in this example is at golang.org/x/oauth2/google.

This example uses the PubSub client, but the same steps apply to the other client libraries underneath this package.

Code:

ctx := context.Background()
creds, err := google.CredentialsFromJSON(ctx, []byte("JSON creds"), pubsub.ScopePubSub)
if err != nil {
    // TODO: handle error.
}
client, err := pubsub.NewClient(ctx, "project-id", option.WithCredentials(creds))
if err != nil {
    // TODO: handle error.
}
_ = client // Use the client.

To set a timeout for an RPC, use context.WithTimeout.

Code:

ctx := context.Background()
// Do not set a timeout on the context passed to NewClient: dialing happens
// asynchronously, and the context is used to refresh credentials in the
// background.
client, err := bigquery.NewClient(ctx, "project-id")
if err != nil {
    // TODO: handle error.
}
// Time out if it takes more than 10 seconds to create a dataset.
tctx, cancel := context.WithTimeout(ctx, 10*time.Second)
defer cancel() // Always call cancel.

if err := client.Dataset("new-dataset").Create(tctx, nil); err != nil {
    // TODO: handle error.
}

Index

Examples

Package Files

cloud.go

Directories

PathSynopsis
bigqueryPackage bigquery provides a client for the BigQuery service.
bigquery/datatransfer/apiv1Package datatransfer is an auto-generated package for the BigQuery Data Transfer API.
bigtablePackage bigtable is an API to Google Cloud Bigtable.
bigtable/bttestPackage bttest contains test helpers for working with the bigtable package.
bigtable/cmd/cbtCbt is a tool for doing basic interactions with Cloud Bigtable.
bigtable/cmd/emulatorcbtemulator launches the in-memory Cloud Bigtable server on the given address.
bigtable/cmd/loadtestLoadtest does some load testing through the Go client library for Cloud Bigtable.
bigtable/cmd/scantestScantest does scan-related load testing against Cloud Bigtable.
bigtable/internal/cbtconfigPackage cbtconfig encapsulates common code for reading configuration from .cbtrc and gcloud.
bigtable/internal/gaxThis is ia snapshot from github.com/googleapis/gax-go with minor modifications.
bigtable/internal/optionPackage option contains common code for dealing with client options.
bigtable/internal/stat
civilPackage civil implements types for civil time, a time-zone-independent representation of time that follows the rules of the proleptic Gregorian calendar with exactly 24-hour days, 60-minute hours, and 60-second minutes.
cmd/go-cloud-debug-agent
cmd/go-cloud-debug-agent/internal/breakpointsPackage breakpoints handles breakpoint requests we get from the user through the Debuglet Controller, and manages corresponding breakpoints set in the code.
cmd/go-cloud-debug-agent/internal/controllerPackage controller is a library for interacting with the Google Cloud Debugger's Debuglet Controller service.
cmd/go-cloud-debug-agent/internal/debugPackage debug provides the portable interface to a program being debugged.
cmd/go-cloud-debug-agent/internal/debug/archPackage arch contains architecture-specific definitions.
cmd/go-cloud-debug-agent/internal/debug/dwarfPackage dwarf provides access to DWARF debugging information loaded from executable files, as defined in the DWARF 2.0 Standard at http://dwarfstd.org/doc/dwarf-2.0.0.pdf
cmd/go-cloud-debug-agent/internal/debug/elfPackage elf implements access to ELF object files.
cmd/go-cloud-debug-agent/internal/debug/localPackage local provides access to a local program.
cmd/go-cloud-debug-agent/internal/debug/machoPackage macho implements access to Mach-O object files.
cmd/go-cloud-debug-agent/internal/debug/remotePackage remote provides remote access to a debugproxy server.
cmd/go-cloud-debug-agent/internal/debug/serverPackage server provides RPC access to a local program being debugged.
cmd/go-cloud-debug-agent/internal/debug/server/protocolPackage protocol defines the types used to represent calls to the debug server.
cmd/go-cloud-debug-agent/internal/valuecollectorPackage valuecollector is used to collect the values of variables in a program.
compute/metadataPackage metadata provides access to Google Compute Engine (GCE) metadata and API service accounts.
containerPackage container contains a deprecated Google Container Engine client.
container/apiv1Package container is an auto-generated package for the Google Container Engine API.
dataproc/apiv1Package dataproc is an auto-generated package for the Google Cloud Dataproc API.
datastorePackage datastore provides a client for Google Cloud Datastore.
debugger/apiv2Package debugger is an auto-generated package for the Stackdriver Debugger API.
dialogflow/apiv2Package dialogflow is an auto-generated package for the Dialogflow API.
dlp/apiv2Package dlp is an auto-generated package for the Cloud Data Loss Prevention (DLP) API.
errorreportingPackage errorreporting is a Google Stackdriver Error Reporting library.
errorreporting/apiv1beta1Package errorreporting is an auto-generated package for the Stackdriver Error Reporting API.
firestorePackage firestore provides a client for reading and writing to a Cloud Firestore database.
firestore/apiv1beta1Package firestore is an auto-generated package for the Google Cloud Firestore API.
firestore/genprotoPackage tests is a generated protocol buffer package.
firestore/internal
httpreplayPackage httpreplay provides an API for recording and replaying traffic from HTTP-based Google API clients.
httpreplay/cmd/httpr
httpreplay/internal/proxyThe proxy package provides a record/replay HTTP proxy.
iamPackage iam supports the resource-specific operations of Google Cloud IAM (Identity and Access Management) for the Google Cloud Libraries.
iam/admin/apiv1Package admin is an auto-generated package for the Google Identity and Access Management (IAM) API.
internal
internal/atomiccachePackage atomiccache provides a map-based cache that supports very fast reads.
internal/btreePackage btree implements in-memory B-Trees of arbitrary degree.
internal/fieldsPackage fields provides a view of the fields of a struct that follows the Go rules, amended to consider tags and case insensitivity.
internal/leakcheckPackage leakcheck contains functions to check leaked goroutines.
internal/optionalPackage optional provides versions of primitive types that can be nil.
internal/prettyPackage pretty implements a simple pretty-printer.
internal/protostructPackage protostruct supports operations on the protocol buffer Struct message.
internal/readme
internal/testutilPackage testutil contains helper functions for writing tests.
internal/trace
internal/tracecontextPackage tracecontext provides encoders and decoders for Stackdriver Trace contexts.
internal/versionPackage version contains version information for Google Cloud Client Libraries for Go, as reported in request headers.
language/apiv1Google Cloud Natural Language API provides natural language understanding technologies to developers.
language/apiv1beta2Package language is an auto-generated package for the Google Cloud Natural Language API.
loggingPackage logging contains a Stackdriver Logging client suitable for writing logs.
logging/apiv2Package logging is an auto-generated package for the Stackdriver Logging API.
logging/internal
logging/internal/testingPackage testing provides support for testing the logging client.
logging/logadminPackage logadmin contains a Stackdriver Logging client that can be used for reading logs and working with sinks, metrics and monitored resources.
longrunningPackage longrunning supports Long Running Operations for the Google Cloud Libraries.
longrunning/autogenPackage longrunning is an auto-generated package for the Google Long Running Operations API.
monitoring/apiv3Package monitoring is an auto-generated package for the Stackdriver Monitoring API.
oslogin/apiv1betaPackage oslogin is an auto-generated package for the Google Cloud OS Login API.
profilerPackage profiler is a client for the Stackdriver Profiler service.
profiler/busybench
profiler/mocks
profiler/proftest
pubsubPackage pubsub provides an easy way to publish and receive Google Cloud Pub/Sub messages, hiding the the details of the underlying server RPCs.
pubsub/apiv1Package pubsub is an auto-generated package for the Google Cloud Pub/Sub API.
pubsub/internal/distribution
pubsub/loadtestPackage loadtest implements load testing for pubsub, following the interface defined in https://github.com/GoogleCloudPlatform/pubsub/tree/master/load-test-framework/ .
pubsub/loadtest/cmd
pubsub/loadtest/pbPackage google_pubsub_loadtest is a generated protocol buffer package.
pubsub/pstestPackage pstest provides a fake Cloud PubSub service for testing.
redis/apiv1beta1Package redis is an auto-generated package for the Google Cloud Memorystore for Redis API.
rpcreplayPackage rpcreplay supports the capture and replay of gRPC calls.
rpcreplay/proto/intstorePackage intstore is a generated protocol buffer package.
rpcreplay/proto/rpcreplayPackage rpcreplay is a generated protocol buffer package.
spannerPackage spanner provides a client for reading and writing to Cloud Spanner databases.
spanner/admin/database/apiv1Package database is an auto-generated package for the Cloud Spanner Database Admin API.
spanner/admin/instance/apiv1Package instance is an auto-generated package for the Cloud Spanner Instance Admin API.
spanner/apiv1Package spanner is an auto-generated package for the Cloud Spanner API.
spanner/internal/testutil
speech/apiv1Google Cloud Speech API.
speech/apiv1beta1Package speech is an auto-generated package for the Google Cloud Speech API.
speech/apiv1p1beta1Package speech is an auto-generated package for the Cloud Speech API.
storagePackage storage provides an easy way to work with Google Cloud Storage.
texttospeech/apiv1Package texttospeech is an auto-generated package for the Cloud Text-to-Speech API.
traceThis package is OBSOLETE.
trace/apiv1Package trace is an auto-generated package for the Stackdriver Trace API.
trace/apiv2Package trace is an auto-generated package for the Stackdriver Trace API.
translatePackage translate is a client for the Google Translation API.
translate/internal/translate/v2Package translate provides access to the Translate API.
videointelligence/apiv1Package videointelligence is an auto-generated package for the Cloud Video Intelligence API.
videointelligence/apiv1beta1Package videointelligence is an auto-generated package for the Google Cloud Video Intelligence API.
videointelligence/apiv1beta2Package videointelligence is an auto-generated package for the Google Cloud Video Intelligence API.
vision/apiv1Integrates Google Vision features, including image labeling, face, logo, and landmark detection, optical character recognition (OCR), and detection of explicit content, into applications.
vision/apiv1p1beta1Package vision is an auto-generated package for the Google Cloud Vision API.

Package cloud is imported by 1 packages. Updated 2018-06-21. Refresh now. Tools for package owners.