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Table of contents
1.
Introduction
2.
Amazon CloudWatch Synthetics
3.
How to get started with Amazon CloudWatch Synthetics
4.
How to create a Canary
5.
Frequently Asked Questions
5.1.
What is Amazon CloudWatch Synthesis?
5.2.
What can be monitored by Cloudwatch synthesis?
5.3.
How does Cloudwatch synthesis work?
6.
Conclusion
Last Updated: Mar 27, 2024

CloudWatch Synthesis

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Introduction

In this article, we will learn about the Amazon CloudWatch Synthetics in detail. You may more easily monitor application endpoints with Amazon CloudWatch Synthetics. With this new functionality, CloudWatch now gathers canary traffic, allowing you to identify problems before your customers do by continuously verifying your customer experience even when there is no client activity on your applications. Your REST APIs, URLs, and website content can be monitored by CloudWatch Synthetics, which also checks for unauthorized alterations caused by phishing, code injection, and cross-site scripting.

Let's dive into the article to get more information about Amazon CloudWatch Synthetics.

Amazon CloudWatch Synthetics

Every minute, around-the-clock, CloudWatch Synthetics tests your endpoints and notifies you if anything goes wrong when your application endpoints don't perform as intended. These tests can be modified to examine your applications for transactions, broken or dead links, step-by-step task completions, page load failures, UI asset load latencies, complex wizard flows, and checkout processes. In order to shorten the mean time to resolution, you can also use CloudWatch Synthetics to isolate alarming application endpoints and trace them back to underlying infrastructure problems.

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How to get started with Amazon CloudWatch Synthetics

Starting with CloudWatch Synthetics is simple. Go to Synthetics in the navigation pane of the CloudWatch console and enter the URL or API you wish to monitor to write your first passing canary in a matter of minutes. You don't need to install or set up any servers, drivers, or other dependencies. The following public AWS Regions provide Amazon CloudWatch Synthetics in preview: US East (N. Virginia), US East (Ohio), and EU (Ireland).

How to create a Canary

Note: Make sure you only use Synthetics canaries to monitor endpoints and APIs that you own or have access to. These endpoints can see more traffic, depending on the canary frequency settings.

You can develop your script or a blueprint that CloudWatch provides when you use the CloudWatch console to construct a canary.

Using your script for the canary, you can alternatively construct a canary using AWS CloudFormation.

You can use a number of the features that CloudWatch Synthetics has incorporated into a library when developing your script.

s has incorporated into a library when developing your own script.

Steps to create a canary:

  • Create a cloudwatch console at the link.
     
  • Select Canaries from the navigation pane.
     
  • Choose Create Canary.
     
  • Select one of the following
    • Select Use a blueprint, then select the kind of canary you want to make to base it on a blueprint script. See Using canary blueprints for more details on what each sort of blueprint does.
    • Select Upload a script to add your own Node.js script and build a unique canary. Then, you can either pick Browse files to find the script on your file system or drag it into the Script box.
    • Select Import from S3 to import your script from an S3 bucket. Enter the full path to your canary under Source location or select Browse S3. For the S3 bucket you utilize, you must have the s3:GetObject and s3:GetObjectVersion permissions. The canary must be created in the same AWS Region as the bucket.
  • Give your canary a name under Name. We advise that you give it a descriptive name that sets it apart from other canaries because the name is used on numerous pages.
     
  • You should specify the URL that you want the canary to test under Application or endpoint URL. This URL has to start with a protocol, like https://. Later on in this process, you must also add information about your VPC if you want the canary to test an endpoint on a VPC.
     
  • Enter the entry point where you want the canary to start if you are using your own script for the canary under Lambda handler. The string you input must end with.handler if you're using a runtime earlier than syn-nodejs-puppeteer-3.4 or syn-python-selenium-1.1. This restriction does not apply if you use syn-nodejs-puppeteer-3.4, syn-python-selenium-1.1, or a later runtime.
     
  • If your script makes use of environment variables, select Environment variables and then enter a value for each environment variable you've established. 
     
  • Choose whether to schedule this canary using a cron expression, run it continually using a rate expression, or execute it only once under Schedule.
     
  • Indicate the duration of data retention for both unsuccessful and successful canary runs. It ranges from 1-455 days. Only the data that CloudWatch Synthetics keeps and shows in the console is impacted by this configuration. Your Amazon S3 buckets' data, as well as any logs or analytics that the canary publishes, are unaffected.
     
  • Select the S3 bucket to utilise for storing the data from the canary runs under Data Storage. There can't be a period in the bucket name (.). A default S3 bucket is utilised or generated if this is left empty. You can specify a bucket in the current Region or in a different Region when entering the URL for the bucket in the text box if you are using the syn-nodejs-puppeteer-3.0 or later runtime. The bucket needs to be in the current Region if you are using an older runtime version.
     
  • Select whether to create a new IAM role or to use an existing one under Access permissions to execute the canary. You may automatically include all the required permissions when CloudWatch Synthetics creates the role. For information on the required permissions, see Required roles and permissions for canaries if you intend to create the role yourself.
     
  • (Optional) Because these roles are unique to only one canary, if you use the CloudWatch console to establish a role for a canary when you create the canary, you cannot reuse the role for additional canaries. You can make use of an existing role that you manually defined and that functions for many canaries. You need the iam:PassRole permission to pass an existing role to Synthetics and Lambda in order to use it. Additionally, you must the iam:GetRole permission.
     
  • (Optional) Add a few key-value pairs as tags for this canary under Tags. Tags can be used to track your AWS expenses as well as identify and categorise your AWS resources.
     
  • (Optional) Select whether to enable active X-Ray tracing for this canary under Active tracing. Only canaries using runtime version syn-nodejs-2.0 or later have access to this option.

Frequently Asked Questions

What is Amazon CloudWatch Synthesis?

You may more easily monitor application endpoints with Amazon CloudWatch Synthetics. With the addition of this new functionality, CloudWatch now gathers canary traffic, allowing you to identify problems before your customers do by continuously verifying your customer experience even when there is no client activity on your applications. 

What can be monitored by Cloudwatch synthesis?

REST APIs, URLs, and website content can be monitored by CloudWatch Synthetics, which also checks for unauthorised alterations caused by phishing, code injection, and cross-site scripting.

How does Cloudwatch synthesis work?

Every minute, around-the-clock, CloudWatch Synthetics tests your endpoints and notifies you if anything goes wrong when your application endpoints don't perform as intended.

Conclusion

In this article, we have extensively discussed the Cloudwatch synthesis. 

We hope this blog has helped you enhance your Cloudwatch synthesis knowledge. If you would like to learn more, check out our articles on AWSAWS Certification, and Cloud Computing. Practice makes a man perfect. To practice and improve yourself in the interview, you can check out Top 100 SQL problemsInterview experienceCoding interview questions, and the Ultimate guide path for interviews.
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