# The Go Cloud Development Kit (Go CDK)
_Write once, run on any cloud ☁️_
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[](https://goreportcard.com/report/github.com/google/go-cloud)
[][PkgGoDev]
[](https://codecov.io/gh/google/go-cloud)
[](https://opensource.org/licenses/Apache-2.0)
The Go Cloud Development Kit (Go CDK) allows Go application developers to
seamlessly deploy cloud applications on any combination of cloud providers. It
does this by providing stable, idiomatic interfaces for common uses like storage
and databases. Think `database/sql` for cloud products.
Imagine writing this to read from blob storage (like Google Cloud Storage or
S3):
ctx := context.Background()
bucket, err := blob.OpenBucket(ctx, "s3://my-bucket")
if err != nil {
return err
}
defer bucket.Close()
blobReader, err := bucket.NewReader(ctx, "my-blob", nil)
if err != nil {
return err
}
and being able to run that code on any cloud you want, avoiding all the ceremony
of cloud-specific authorization, tracing, SDKs and all the other code required
to make an application portable across cloud platforms.
The project works well with a code generator called
[Wire](https://github.com/google/wire/blob/master/README.md). It creates
human-readable code that only imports the cloud SDKs for services you use. This
allows the Go CDK to grow to support any number of cloud services, without
increasing compile times or binary sizes, and avoiding any side effects from
`init()` functions.
You can learn more about the project from our [announcement blog post][], or our
talk at Next 2018:
[][video]
## Installation
# First "cd" into your project directory if you have one to ensure "go get" uses
# Go modules (or not) appropriately. See "go help modules" for more info.
go get gocloud.dev
The Go CDK builds at the latest stable release of Go. Previous Go versions may
compile but are not supported.
## Documentation
Documentation for the project lives primarily on https://gocloud.dev/, including
[tutorials][].
You can also browse Go package reference on [pkg.go.dev][PkgGoDev].
## Project status
The APIs are still in alpha, but we think they are production-ready and are
actively looking for feedback from early adopters. If you have comments or
questions please open an issue.
At this time we prefer to focus on maintaining the existing APIs and drivers,
and are unlikely to accept new ones into the `go-cloud` repository. The modular
nature of the Go CDK makes it simple to host new APIs and drivers for existing
APIs externally, in separate repositories.
If you have a new API or driver that you believe are important and mature enough
to be included, feel free to open an issue to discuss this; our default will
likely be to suggest starting in a separate repository. We'll also be happy
to maintain a list of such external APIs and drivers in this README.
## Current features
The Go CDK provides generic APIs for:
* Unstructured binary (blob) storage
* Publish/Subscribe (pubsub)
* Variables that change at runtime (runtimevar)
* Connecting to MySQL (including MariaDB) and PostgreSQL databases (mysql, postgres)
* Server startup and diagnostics: request logging, tracing, and health
checking (server)
## Legal disclaimer
The Go CDK is open-source and released under an [Apache 2.0
License](https://github.com/google/go-cloud/blob/master/LICENSE). Copyright ©
2018–2019 The Go Cloud Development Kit Authors.
If you are looking for the website of GoCloud Systems, which is unrelated to the
Go CDK, visit https://gocloud.systems.