Effective DevOps with AWS

Launching our new stack

We will save those changes, generate our CloudFormation template and update our stack:

$ git add nodeserver-cf-template.py$ git commit -m "Using autoscaling group instead of individual EC2 instances"$ git push$ python nodeserver-cf-template.py > nodeserver-cf.template  

Then update (or recreate) the Hello World application with the following steps:

1. Open https://console.aws.amazon.com/cloudformation in your browser.
2. Select the helloworld-production stack and, in the Action menu, select Update stack (or go through the usual steps to create a CloudFormation stack).
3. Select the new template file nodeserver-cf.template and click Next. The new parameters page looks a lot more complete than previously:

4. We can opt for scaling ...