Download Python and AWS Cookbook by Mitch Garnaat PDF

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By Mitch Garnaat

If you wish to use Amazon internet 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 begun with greater than dozen recipes for utilizing Python with AWS, in keeping with the author’s boto library.

You’ll locate exact recipes for operating with the S3 garage provider in addition to EC2, the carrier that allows you to layout and construct cloud functions. each one recipe contains a code resolution you should use instantly, in addition to a dialogue of why and the way the recipe works. you furthermore mght get targeted recommendation for utilizing boto with AWS and different cloud services.

This book’s recipes comprise easy methods to aid you:

* release cases on EC2, and hold tune of them with tags
* affiliate an Elastic IP tackle with an example
* fix a failed Elastic Block shop quantity from a photo
* shop and display screen your personal customized metrics in CloudWatch
* Create a bucket in S3 to include your facts gadgets
* lessen the price of storing noncritical facts
* hinder unintentional deletion of knowledge in S3

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If you click on it, you should see a page like Figure 2-1 in your browser. Figure 2-1. SNS Confirmation Page With that complete, we have successfully established the SNS topic that can be used for publishing CloudWatch alarms, and we have also subscribed to that topic so we will receive an email message each time an alarm is published to the topic. The next step is to configure the alarm in CloudWatch. Example 2-16. 815000]] >>> In the example above, after creating my alarm and associating it with my metric in CloudWatch, I then simulated a change in state with the call to set_alarm_state.

The Instance object has a launch_time attribute, but it is a string representation of the timestamp, and we need a Python datetime object. We can use the boto utility function parse_ts to convert the string to a datetime object. The utcnow function will return a datetime object representing the current time in UTC. Data returned by CloudWatch always has an associated Unit that represents the unit of measure. The Units attribute of the Metric class is a list of all available units. For example, if you are asking for data about network output, you could choose between Bytes/Second, Kilobytes/Second, Megabytes/Second, etc.

Well, that’s where the part_handler comes in, the final piece of the puzzle. The part_handler can tell CloudInit about new types of files that it is able to handle, and then whenever CloudInit comes across that type of file, it will call our part_han dler to take care of it. Example 2-22 shows the part_handler. Example 2-22. Custom CloudInit Part Handler #part-handler import os def list_types(): """ Return a list of mime-types that are handled by this module. close() The final piece of the puzzle is the code that bundles everything up to send to the instance when we run it.

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