# AWS SDK for Go

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aws-sdk-go is the official AWS SDK for the Go programming language.

Checkout our [release notes](https://github.com/aws/aws-sdk-go/releases) for information about the latest bug fixes, updates, and features added to the SDK.

## Installing

If you are using Go 1.5 with the `GO15VENDOREXPERIMENT=1` vendoring flag you can use the following to get the SDK as the SDK's runtime dependencies are vendored in the `vendor` folder.

    $ go get -u github.com/aws/aws-sdk-go

Otherwise you'll need to tell Go to get the SDK and all of its dependencies.

    $ go get -u github.com/aws/aws-sdk-go/...

## Configuring Credentials

Before using the SDK, ensure that you've configured credentials. The best
way to configure credentials on a development machine is to use the
`~/.aws/credentials` file, which might look like:

```
[default]
aws_access_key_id = AKID1234567890
aws_secret_access_key = MY-SECRET-KEY
```

You can learn more about the credentials file from this
[blog post](http://blogs.aws.amazon.com/security/post/Tx3D6U6WSFGOK2H/A-New-and-Standardized-Way-to-Manage-Credentials-in-the-AWS-SDKs).

Alternatively, you can set the following environment variables:

```
AWS_ACCESS_KEY_ID=AKID1234567890
AWS_SECRET_ACCESS_KEY=MY-SECRET-KEY
```

### AWS CLI config file (`~/aws/config`)
The AWS SDK for Go does not support the AWS CLI's config file. The SDK will not use any contents from this file. The SDK only supports the shared credentials file (`~/aws/credentials`). #384 tracks this feature request discussion.

## Using the Go SDK

To use a service in the SDK, create a service variable by calling the `New()`
function. Once you have a service client, you can call API operations which each
return response data and a possible error.

To list a set of instance IDs from EC2, you could run:

```go
package main

import (
	"fmt"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/ec2"
)

func main() {
	// Create an EC2 service object in the "us-west-2" region
	// Note that you can also configure your region globally by
	// exporting the AWS_REGION environment variable
	svc := ec2.New(session.New(), &aws.Config{Region: aws.String("us-west-2")})

	// Call the DescribeInstances Operation
	resp, err := svc.DescribeInstances(nil)
	if err != nil {
		panic(err)
	}

	// resp has all of the response data, pull out instance IDs:
	fmt.Println("> Number of reservation sets: ", len(resp.Reservations))
	for idx, res := range resp.Reservations {
		fmt.Println("  > Number of instances: ", len(res.Instances))
		for _, inst := range resp.Reservations[idx].Instances {
			fmt.Println("    - Instance ID: ", *inst.InstanceId)
		}
	}
}
```

You can find more information and operations in our
[API documentation](http://docs.aws.amazon.com/sdk-for-go/api/).

## License

This SDK is distributed under the
[Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0),
see LICENSE.txt and NOTICE.txt for more information.
