By Mitch Garnaat

If you must use Amazon net companies (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 begun with greater than dozen recipes for utilizing Python with AWS, in line with the author’s boto library.

You’ll locate particular recipes for operating with the S3 garage carrier in addition to EC2, the carrier that permits you to layout and construct cloud functions. every one recipe encompasses a code answer you should use instantly, besides a dialogue of why and the way the recipe works. you furthermore may get designated suggestion for utilizing boto with AWS and different cloud services.

This book’s recipes comprise the way to support you:

* release circumstances on EC2, and retain music of them with tags
* affiliate an Elastic IP tackle 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 include your info items
* lessen the price of storing noncritical information
* hinder unintended deletion of knowledge in S3

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Sample text

First you have to allocate an IP address. Then, you associate that IP address with an instance. There is no charge for an Elastic IP Address that is being used, but if you allocate one and don’t have it associated with an instance, there is a small, per-hour charge to discourage people from hoarding those valuable IP addresses. Example 2-7. connect_ec2() # Let's assume the instance we are interested in has already been started # in the previous examples and is tagged with "paws". This little # incantation will retrieve it for us.

14 Storing Custom Data in CloudWatch Problem You have your own custom metrics that you would like to be able to monitor. Solution Use CloudWatch Custom Metrics to publish your data to CloudWatch. Discussion CloudWatch provides a wide-range of standard metrics that can be monitored or incorporated into alarms. However, many applications have custom data that is important to monitor, such as query times from a database or total disk usage on some partition. The PutMetricData request of CloudWatch allows you to define your own metrics and store your own data in CloudWatch and then use the existing tools and GUIs to access and graph that data.

The time is now Wed, 21 Sep 2011 23:53:51 +0000! txt has, in fact, been created, indicating that the script has been run. The mechanism behind this is quite simple. ), it will try to execute the script as code. The script will be run as root, so it has full access to the instance. The next example will be a bit more ambitious. We will use several key features of a package called CloudInit, which is sort of a grown-up version of user-data scripts developed by Canonical. The CloudInit package is also automatically supported by modern Ubuntu distros as well as Amazon Linux AMI images.

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