Launching a Managed Instance Group in Compute Engine

1. In the Google Cloud console, go to the Compute Engine and then go to Instance templates

        Click Create instance template.
   

2. Name your Instance Template

3. Under Machine Type choose e2-micro

4. Under Firewall allow HTTP and HTTPS

5. Click Create

For Health Check:

1. In the Google Cloud console, go to the Health Check page.
2. Click Create Health Check.
3. Give the health check a name, Regional Scope, TCP protocol, port 80.
4. Click Create.

For Creating the Instance Group:

1. In the Google Cloud console, go to the Instance groups page.
2. Click Create instance group.
3. Under Instance template, select the instance template you created.
4. Under Location, choose Single Zone US-Central1 for region, and US-Central1-A for zone.
5. For Autoscaling, choose On: add and remove instances to the group with a min of 1 and a max of 3, and CPU Untilization at 60%.
6. For Health Check, choose the health check you've created.
7. Click Create.

1. Select the instance and choose SSH.
2. Use command sudo apt-get install stress and then sudo stress --cpu 2 --timeout 500 to stress your instance.
3. After eight minutes, you should see your instance scale to maximum capacity of three instances.