Python and AWS by Mitch Garnaat

By Mitch Garnaat

Should you intend to exploit Amazon net prone (AWS) for distant computing and garage, Python is a perfect programming language for constructing purposes and controlling your cloud-based infrastructure. This cookbook will get you all started with greater than dozen recipes for utilizing Python with AWS, according to the author’s boto library.You’ll locate particular recipes for operating with the S3 garage provider in addition to EC2, the provider that permits you to layout and construct cloud purposes. every one recipe features a code resolution you should use instantly, besides a dialogue of why and the way the recipe works. you furthermore may get designated recommendation for utilizing boto with AWS and different cloud companies. This book’s recipes comprise the right way to support you:Launch situations on EC2, and hold song of them with tags affiliate an Elastic IP deal with with an example restoration a failed Elastic Block shop quantity from a photograph shop and visual display unit your personal customized metrics in CloudWatch Create a bucket in S3 to comprise your info items lessen the price of storing noncritical information hinder unintended deletion of information in S3

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Attach a Volume import boto import time def create_and_attach_volume(instance, volume_size, device_name): """ Create a new EBS volume and attach it to the instance. instance The instance object representing the instance to which the volume will be attached. volume_size The size (in GB) of the new volume. device_name The device name to which the new volume will be referred to on the instance. create_volume(volume_size, azone) # Wait for the volume to be created. id, device_name) return volume Back Up Your EBS Volumes Problem You have vital information stored on EBS volumes and you want to make sure that the data is safe.

To accomplish this, we need to gather some information: We need to know the AMI, keypair, security groups, availability zone, instance type, etc. of the current instance. We can get all of that information easily from the boto Instance object that represents the current instance. We need to make copies of all EBS volumes that are attached to the instance. For this recipe, we will assume that the latest snapshot of the volumes represents the state we want to recreate. We need the user_data that was passed to the instance when it was started.

Originally, that was the only region available, but AWS has expanded its operations considerably and, at the time of this writing, EC2 was available in the following regions, each with its own endpoint: us-east-1 [US-East (Northern Virginia)] us-west-1 [US-West (Northern California)] eu-west-1 [EU (Ireland)] ap-southeast-1 [Asia Pacific (Singapore)] ap-northeast-1 [Asia Pacific (Tokyo)] boto provides a number of ways to find and connect to these regions. For example, the following will return a list of all RegionInfo objects for a given service (EC2 in this case).

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