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Amazon Web Services Bootcamp

You're reading from Amazon Web Services Bootcamp

Product type Book

Published in Mar 2018

Publisher Packt

ISBN-13 9781788294454

Pages 338 pages

Edition 1st Edition

Languages

Concepts

Cloud Computing

Table of Contents (16) Chapters

Title Page

Copyright and Credits

Packt Upsell

Contributors

Preface

1. Getting Started with AWS

2. Configuring IAM

3. Building Servers Using EC2

4. Storing Files on S3

5. Managing RDS

6. Implementing DynamoDB – NoSQL Database

7. Implementing Caching Using ElastiCache

8. Triggering Notifications

9. All About CloudWatch

1. Other Books You May Enjoy

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Index

Alarms

CloudWatch alarms provide monitoring for our AWS resources and applications. An alarm uses a metric to monitor; if the metric's value crosses the threshold value defined for a certain period of time, an alarm action is triggered, which can be either an EC2 action, an auto scaling action, or a SNS event. CloudWatch maintains the state of change for a certain period of time. For every state of change, an alarm action can be triggered, so that we can take action properly. The following are the alarm states:

OK: Metric value is within the limits of the threshold value
ALARM: Metric value crosses the threshold value
INSUFFICIENT_DATA: Metric value is not available or there is not enough data to identify the alarm state

Note

IMPORTANT: We can create up to 5,000 alarms per region per AWS account.

Let's see how to create alarms using the AWS Management Console, AWS CLI, AWS SDK – Java, and CloudFormation. For our example, we will create an alarm for the RDS instance's CPU utilization. If the RDS...

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