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