mirror of
https://github.com/kubernetes-sigs/descheduler.git
synced 2026-01-26 05:14:13 +01:00
246 lines
9.2 KiB
Markdown
246 lines
9.2 KiB
Markdown
# Google Cloud for Go
|
|
|
|
[](https://travis-ci.org/GoogleCloudPlatform/google-cloud-go)
|
|
[](https://godoc.org/cloud.google.com/go)
|
|
|
|
``` go
|
|
import "cloud.google.com/go"
|
|
```
|
|
|
|
Go packages for Google Cloud Platform services.
|
|
|
|
**NOTE:** These packages are under development, and may occasionally make
|
|
backwards-incompatible changes.
|
|
|
|
**NOTE:** Github repo is a mirror of [https://code.googlesource.com/gocloud](https://code.googlesource.com/gocloud).
|
|
|
|
## News
|
|
|
|
_September 8, 2016_
|
|
|
|
* New clients for some of Google's Machine Learning APIs: Vision, Speech, and
|
|
Natural Language.
|
|
|
|
* Preview version of a new [Stackdriver Logging][cloud-logging] client in
|
|
[`cloud.google.com/go/preview/logging`](https://godoc.org/cloud.google.com/go/preview/logging).
|
|
This client uses gRPC as its transport layer, and supports log reading, sinks
|
|
and metrics. It will replace the current client at `cloud.google.com/go/logging` shortly.
|
|
|
|
## Supported APIs
|
|
|
|
Google API | Status | Package
|
|
-------------------------------|--------------|-----------------------------------------------------------
|
|
[Datastore][cloud-datastore] | beta | [`cloud.google.com/go/datastore`][cloud-datastore-ref]
|
|
[Storage][cloud-storage] | beta | [`cloud.google.com/go/storage`][cloud-storage-ref]
|
|
[Pub/Sub][cloud-pubsub] | experimental | [`cloud.google.com/go/pubsub`][cloud-pubsub-ref]
|
|
[Bigtable][cloud-bigtable] | beta | [`cloud.google.com/go/bigtable`][cloud-bigtable-ref]
|
|
[BigQuery][cloud-bigquery] | experimental | [`cloud.google.com/go/bigquery`][cloud-bigquery-ref]
|
|
[Logging][cloud-logging] | experimental | [`cloud.google.com/go/logging`][cloud-logging-ref]
|
|
[Vision][cloud-vision] | experimental | [`cloud.google.com/go/vision`][cloud-vision-ref]
|
|
[Language][cloud-language] | experimental | [`cloud.google.com/go/language/apiv1beta1`][cloud-language-ref]
|
|
[Speech][cloud-speech] | experimental | [`cloud.google.com/go/speech/apiv1beta`][cloud-speech-ref]
|
|
|
|
|
|
> **Experimental 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](https://groups.google.com/forum/#!forum/google-api-go-announce)
|
|
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`](.travis.yml).
|
|
|
|
## Authorization
|
|
|
|
By default, each API will use [Google Application Default Credentials][default-creds]
|
|
for authorization credentials used in calling the API endpoints. This will allow your
|
|
application to run in many environments without requiring explicit configuration.
|
|
|
|
Manually-configured authorization can be achieved using the
|
|
[`golang.org/x/oauth2`](https://godoc.org/golang.org/x/oauth2) package to
|
|
create an `oauth2.TokenSource`. This token source can be passed to the `NewClient`
|
|
function for the relevant API using a
|
|
[`option.WithTokenSource`](https://godoc.org/google.golang.org/api/option#WithTokenSource)
|
|
option.
|
|
|
|
## Google Cloud Datastore [](https://godoc.org/cloud.google.com/go/datastore)
|
|
|
|
[Google Cloud Datastore][cloud-datastore] ([docs][cloud-datastore-docs]) is a fully-
|
|
managed, schemaless database for storing non-relational data. Cloud Datastore
|
|
automatically scales with your users and supports ACID transactions, high availability
|
|
of reads and writes, strong consistency for reads and ancestor queries, and eventual
|
|
consistency for all other queries.
|
|
|
|
Follow the [activation instructions][cloud-datastore-activation] to use the Google
|
|
Cloud Datastore API with your project.
|
|
|
|
First create a `datastore.Client` to use throughout your application:
|
|
|
|
```go
|
|
client, err := datastore.NewClient(ctx, "my-project-id")
|
|
if err != nil {
|
|
log.Fatalln(err)
|
|
}
|
|
```
|
|
|
|
Then use that client to interact with the API:
|
|
|
|
```go
|
|
type Post struct {
|
|
Title string
|
|
Body string `datastore:",noindex"`
|
|
PublishedAt time.Time
|
|
}
|
|
keys := []*datastore.Key{
|
|
datastore.NewKey(ctx, "Post", "post1", 0, nil),
|
|
datastore.NewKey(ctx, "Post", "post2", 0, 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 {
|
|
log.Fatal(err)
|
|
}
|
|
```
|
|
|
|
## Google Cloud Storage [](https://godoc.org/cloud.google.com/go/storage)
|
|
|
|
[Google Cloud Storage][cloud-storage] ([docs][cloud-storage-docs]) allows you to store
|
|
data on Google infrastructure with very high reliability, performance and availability,
|
|
and can be used to distribute large data objects to users via direct download.
|
|
|
|
https://godoc.org/cloud.google.com/go/storage
|
|
|
|
First create a `storage.Client` to use throughout your application:
|
|
|
|
```go
|
|
client, err := storage.NewClient(ctx)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
```
|
|
|
|
```go
|
|
// Read the object1 from bucket.
|
|
rc, err := client.Bucket("bucket").Object("object1").NewReader(ctx)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer rc.Close()
|
|
body, err := ioutil.ReadAll(rc)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
```
|
|
|
|
## Google Cloud Pub/Sub [](https://godoc.org/cloud.google.com/go/pubsub)
|
|
|
|
[Google Cloud Pub/Sub][cloud-pubsub] ([docs][cloud-pubsub-docs]) allows you to connect
|
|
your services with reliable, many-to-many, asynchronous messaging hosted on Google's
|
|
infrastructure. Cloud Pub/Sub automatically scales as you need it and provides a foundation
|
|
for building your own robust, global services.
|
|
|
|
First create a `pubsub.Client` to use throughout your application:
|
|
|
|
```go
|
|
client, err := pubsub.NewClient(ctx, "project-id")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
```
|
|
|
|
```go
|
|
// Publish "hello world" on topic1.
|
|
topic := client.Topic("topic1")
|
|
msgIDs, err := topic.Publish(ctx, &pubsub.Message{
|
|
Data: []byte("hello world"),
|
|
})
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Create an iterator to pull messages via subscription1.
|
|
it, err := client.Subscription("subscription1").Pull(ctx)
|
|
if err != nil {
|
|
log.Println(err)
|
|
}
|
|
defer it.Stop()
|
|
|
|
// Consume N messages from the iterator.
|
|
for i := 0; i < N; i++ {
|
|
msg, err := it.Next()
|
|
if err == pubsub.Done {
|
|
break
|
|
}
|
|
if err != nil {
|
|
log.Fatalf("Failed to retrieve message: %v", err)
|
|
}
|
|
|
|
fmt.Printf("Message %d: %s\n", i, msg.Data)
|
|
msg.Done(true) // Acknowledge that we've consumed the message.
|
|
}
|
|
```
|
|
|
|
## Contributing
|
|
|
|
Contributions are welcome. Please, see the
|
|
[CONTRIBUTING](https://github.com/GoogleCloudPlatform/google-cloud-go/blob/master/CONTRIBUTING.md)
|
|
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](https://github.com/GoogleCloudPlatform/google-cloud-go/blob/master/CONTRIBUTING.md#contributor-code-of-conduct)
|
|
for more information.
|
|
|
|
[cloud-datastore]: https://cloud.google.com/datastore/
|
|
[cloud-datastore-ref]: https://godoc.org/cloud.google.com/go/datastore
|
|
[cloud-datastore-docs]: https://cloud.google.com/datastore/docs
|
|
[cloud-datastore-activation]: https://cloud.google.com/datastore/docs/activate
|
|
|
|
[cloud-pubsub]: https://cloud.google.com/pubsub/
|
|
[cloud-pubsub-ref]: https://godoc.org/cloud.google.com/go/pubsub
|
|
[cloud-pubsub-docs]: https://cloud.google.com/pubsub/docs
|
|
|
|
[cloud-storage]: https://cloud.google.com/storage/
|
|
[cloud-storage-ref]: https://godoc.org/cloud.google.com/go/storage
|
|
[cloud-storage-docs]: https://cloud.google.com/storage/docs/overview
|
|
[cloud-storage-create-bucket]: https://cloud.google.com/storage/docs/cloud-console#_creatingbuckets
|
|
|
|
[cloud-bigtable]: https://cloud.google.com/bigtable/
|
|
[cloud-bigtable-ref]: https://godoc.org/cloud.google.com/go/bigtable
|
|
|
|
[cloud-bigquery]: https://cloud.google.com/bigquery/
|
|
[cloud-bigquery-ref]: https://godoc.org/cloud.google.com/go/bigquery
|
|
|
|
[cloud-logging]: https://cloud.google.com/logging/
|
|
[cloud-logging-ref]: https://godoc.org/cloud.google.com/go/logging
|
|
|
|
[cloud-vision]: https://cloud.google.com/vision/
|
|
[cloud-vision-ref]: https://godoc.org/cloud.google.com/go/vision
|
|
|
|
[cloud-language]: https://cloud.google.com/natural-language
|
|
[cloud-language-ref]: https://godoc.org/cloud.google.com/go/language/apiv1beta1
|
|
|
|
[cloud-speech]: https://cloud.google.com/speech
|
|
[cloud-speech-ref]: https://godoc.org/cloud.google.com/go/speech/apiv1beta1
|
|
|
|
[default-creds]: https://developers.google.com/identity/protocols/application-default-credentials
|