AWS SDK for Ruby - V2


This repository contains the code for the V2 AWS SDK for Ruby. For v1 of the AWS SDK for Ruby, see aws/aws-sdk-ruby.

Links of Interest

• Documentation
• Release Notes
• Upgrading Notes
• Issues
• Forums
• License

V2 Preview Release

The V2 AWS SDK for Ruby is currently available as a preview-release. The code is organized into multiple gems. Installing the preview release of aws-sdk will install two other gems:

• aws-sdk - preview
• aws-sdk-resources - preview
• aws-sdk-core - stable

Note: Version 2 of the AWS SDK for Ruby requires Ruby 1.9.3+

Using V1 and V2 Together

Version 2 uses a the Aws namespace, allowing it to be used in the same application as the v1 AWS SDK for Ruby.

AWS::S3 # v1
Aws::S3 # v2

Here is an example that demonstrates using V1 and V2 together:

# in Gemfile
gem 'aws-sdk-v1'
gem 'aws-sdk', '2.0.6.pre'

# in application
require 'aws-sdk-v1'
require 'aws-sdk'

Configuration

To use the Ruby SDK, you must configure a region and credentials.

Region

You can construct a service client with a region:

ec2 = Aws::EC2::Client.new(region:'us-west-2')

Alternatively, a default region can be loaded from one of the following locations:

• Aws.config[:region]
• ENV['AWS_REGION']

See this document for a list of supported regions by service.

Credentials

You can construct a client with credentials like so:

s3 = Aws::S3::Client.new(credentials: credentials)

The credentials object may be an instance of:

• Aws::Credentials
• Aws::SharedCredentials
• Aws::InstanceProfileCredentials
• Aws::AssumeRoleCredentials

Default credentials are searched for in the following locations:

• Aws.config[:credentials]
• ENV['AWS_ACCESS_KEY_ID'] and ENV['AWS_SECRET_ACCESS_KEY']
• The shared credentials ini file at HOME/.aws/credentials
• From an instance profile when running on EC2

Please take care to never commit credentials to source control. We strongly recommended loading credentials from an external source.

require 'json'
creds = JSON.load(File.read('secrets.json'))
creds = Aws::Credentials.new(creds['AccessKeyId'], creds['SecretAccessKey'])

Clients (aws-sdk-core) - stable

Construct a service client to make API calls. Each client provides a 1-to-1 mapping of methods to API operations. Refer to the API documentation for a complete list of available methods.

# list buckets in Amazon S3
s3 = Aws::S3::Client.new
resp = s3.list_buckets
resp.buckets.map(&:name)
#=> ["bucket-1", "bucket-2", ...]

API methods accept a hash of additional request parameters and return structured response data.

# list the first two objects in a bucket
resp = s3.list_objects(bucket: 'aws-sdk-core', max_keys: 2)
resp.contents.each do |object|
  puts "#{object.key} => #{object.etag}"
end

Paging Responses

Many AWS operations limit the number of results returned with each response. To make it easy to get the next page of results, every AWS response object is enumerable:

# yields one response object per API call made, this will enumerate
# EVERY object in the named bucket
s3.list_objects(bucket:'aws-sdk').each do |response|
  puts response.contents.map(&:key)
end

If you prefer to control paging yourself, response objects have helper methods that control paging:

# make a request that returns a truncated response
resp = s3.list_objects(bucket:'aws-sdk')

resp.last_page? #=> false
resp.next_page? #=> true
resp = resp.next_page # send a request for the next response page
resp = resp.next_page until resp.last_page?

Waiters

Waiters are a utility methods that poll for a particular state. To invoke a waiter, call #wait_until on a client:

begin
  ec2.wait_until(:instance_running, instance_ids:['i-12345678'])
  puts "instance running"
rescue Aws::Waiters::Errors::WaiterFailed => error
  puts "failed waiting for instance running: #{error.message}"
end

Waiters have sensible default polling intervals and maximum attempts. You can configure these per call to #wait_until. You can also register callbacks that are triggered before each polling attempt and before waiting. See the API documentation for more examples and for a list of supported waiters per service.

Resources (aws-sdk-resource) - preview release

Resource interfaces are object oriented classes that represent actual resources in AWS. Resource interfaces built ontop of API clients and provide additional functionality.

s3 = Aws::S3::Resource.new

# reference an existing bucket
bucket = s3.bucket('aws-sdk')

# enumerate every object in a bucket
bucket.objects.each do |obj|
  puts "#{object.key} => #{obj.etag}"
end

# batch operations, delete objects in batches of 1k
bucket.objects(prefix: '/tmp-files/').delete

# single object operations
obj = bucket.object('hello')
obj.put(body:'Hello World!')
obj.etag
obj.delete

Resource interfaces are currently in a preview period. While quite stable, expect possible minor changes before a final stable version is released. Currently there are Resource-oriented interfaces for:

• Aws::S3
• Aws::IAM
• Aws::EC2 - partial
• Aws::SQS
• Aws::SNS
• Aws::Glacier
• Aws::OpsWorld
• Aws::CloudFormation

REPL - AWS Interactive Console

The aws-sdk-core gem ships with a REPL that provides a simple way to test the Ruby SDK. You can access the REPL by running aws.rb from the command line.

$ aws.rb
Aws> ec2.describe_instances.reservations.first.instances.first
[Aws::EC2::Client 200 0.216615 0 retries] describe_instances()
<struct
 instance_id="i-1234567",
 image_id="ami-7654321",
 state=<struct  code=16, name="running">,
 ...>

You can enable HTTP wire logging by setting the verbose flag:

$ aws.rb -v

In the REPL, every service class has a helper that returns a new client object. Simply downcase the service module name for the helper:

• Aws::S3 => s3
• Aws::EC2 => ec2
• etc

Versioning

This project uses semantic versioning. You can safely express a dependency on a major version and expect all minor and patch versions to be backwards compatible.

Supported Services

Service Name	Service Class	API Versions
Amazon CloudFront	CloudFront	2014-10-21
Amazon CloudSearch	CloudSearch	2013-01-01
Amazon CloudSearch Domain	CloudSearchDomain	2013-01-01
Amazon CloudWatch	CloudWatch	2010-08-01
Amazon CloudWatch Logs	CloudWatchLogs	2014-03-28
Amazon Cognito Identity	CognitoIdentity	2014-06-30
Amazon Cognito Sync	CognitoSync	2014-06-30
Amazon DynamoDB	DynamoDB	2012-08-10
Amazon Elastic Compute Cloud	EC2	2014-10-01
Amazon Elastic MapReduce	EMR	2009-03-31
Amazon Elastic Transcoder	ElasticTranscoder	2012-09-25
Amazon ElastiCache	ElastiCache	2014-09-30
Amazon Glacier	Glacier	2012-06-01
Amazon Kinesis	Kinesis	2013-12-02
Amazon Redshift	Redshift	2012-12-01
Amazon Relational Database Service	RDS	2014-09-01
Amazon Route 53	Route53	2013-04-01
Amazon Route 53 Domains	Route53Domains	2014-05-15
Amazon Simple Email Service	SES	2010-12-01
Amazon Simple Notification Service	SNS	2010-03-31
Amazon Simple Queue Service	SQS	2012-11-05
Amazon Simple Storage Service	S3	2006-03-01
Amazon Simple Workflow Service	SWF	2012-01-25
Amazon SimpleDB	SimpleDB	2009-04-15
Auto Scaling	AutoScaling	2011-01-01
AWS CloudFormation	CloudFormation	2010-05-15
AWS CloudTrail	CloudTrail	2013-11-01
AWS CodeDeploy	CodeDeploy	2014-10-06
AWS Config	ConfigService	2014-10-17
AWS Data Pipeline	DataPipeline	2012-10-29
AWS Direct Connect	DirectConnect	2012-10-25
AWS Elastic Beanstalk	ElasticBeanstalk	2010-12-01
AWS Identity and Access Management	IAM	2010-05-08
AWS Import/Export	ImportExport	2010-06-01
AWS Key Management Service	KMS	2014-11-01
AWS Lambda	Lambda	2014-11-11
AWS OpsWorks	OpsWorks	2013-02-18
AWS Security Token Service	STS	2011-06-15
AWS Storage Gateway	StorageGateway	2013-06-30
AWS Support	Support	2013-04-15
Elastic Load Balancing	ElasticLoadBalancing	2012-06-01

License

This library is distributed under the apache license, version 2.0

copyright 2013. amazon web services, inc. all rights reserved.

licensed under the apache license, version 2.0 (the "license");
you may not use this file except in compliance with the license.
you may obtain a copy of the license at

    http://www.apache.org/licenses/license-2.0

unless required by applicable law or agreed to in writing, software
distributed under the license is distributed on an "as is" basis,
without warranties or conditions of any kind, either express or implied.
see the license for the specific language governing permissions and
limitations under the license.