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Configuring AWS Auto Scaling Rolling Updates

Welcome to this hands-on lab, where you will learn how to perform Auto Scaling rolling updates. A common scenario is the need to perform updates on the instances in an Auto Scaling group. It is not possible to update launch configurations directly, which complicates updating Auto Scaling groups without incurring downtime. Using Auto Scaling rolling updates is the answer. Rolling updates allow you to update instances (where the instances are actually replaced), while allowing you to specify that at least one instance is always active. In this way, downtime can be avoided while the update is taking place.

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 30m
Last updated
Clock icon Aug 31, 2025

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Table of Contents

  1. Challenge

    Create a CloudFormation Stack

    1. Download the rolling.json template file from the GitHub lab repository.
    2. Create a CloudFormation stack using the Upload a template file method and select the rolling.json file.

  2. Challenge

    Update Auto Scaling Group

    1. Update the stack and click Edit template in Designer.
    2. Insert the following UpdatePolicy in the template on line 111: 
      "UpdatePolicy": {
    "AutoScalingRollingUpdate": {
        "MaxBatchSize": "4",
        "MinInstancesInService": "1",
        "PauseTime": "PT2M"
    }
},
    3. After you validate and create the updated stack, on the Specify stack details page, under Ec2InstanceType, enter t2.medium then Submit.
    4. In the CloudFormation console, verify the stack update is now complete.
    5. In the EC2 console, verify there are now four running t2.medium instances.
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Pluralsight Skills

Pluralsight Skills gives leaders confidence they have the skills needed to execute technology strategy. Technology teams can benchmark expertise across roles, speed up release cycles and build reliable, secure products. By leveraging our expert content, skill assessments and one-of-a-kind analytics, keep up with the pace of change, put the right people on the right projects and boost productivity. It's the most effective path to developing tech skills at scale.

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