38 lines
1.1 KiB
Markdown
38 lines
1.1 KiB
Markdown
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## AWS Auto Scaling Groups - Dynamic Scaling Policy
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### Requirements
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1. Existing Auto Scaling Group with maximum capacity set to at least 3
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2. One running EC2 instance with max of 4 CPUs
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### Objectives
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1. Create a dynamic scaling policy with the following properties
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1. Track average CPU utilization
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2. Target value should be 70%
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2. Increase the CPU utilization to at least 70%
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1. Do you see change in number of instances?
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1. Decrease CPU utilization to less than 70%
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1. Do you see change in number of instances?
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### Solution
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#### Console
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1. Go to EC2 service -> Auto Scaling Groups and click on the tab "Automating scaling"
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2. Choose "Target tracking scaling" under "Policy Type"
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3. Set metric type to Average CPU utilization
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4. Set target value to 70% and click on "Create"
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1. If you are using Amazon Linux 2, you can stress the instance with the following:
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```
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sudo amazon-linux-extras install epel -y
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sudo yum install stress -y
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stress -c 4 # assuming you have 4 CPUs
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```
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2. Yes, additional EC2 instance was added
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1. Simply stop the stress command
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2. Yes, one of the EC2 instances was terminated
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