as-replace-instances

Safely replace all instances in AWS AutoScaling Group.

How it works

• Doubles MinSize and DesiredCapacity of target AutoScaling Group
• Waits for new instances to become healthy in all AutoScaling Group's ELBs
• Terminates obsolete instances
• Returns MinSize and DesiredCapacity to their original values

Installation

Install globally with npm to use CLI commands:

$ npm install -g as-replace-instances

or use its javascript API in your own project.

Configuration

Place the following inside a file called ~/.asrc

{
    "accessKeyId": "AWS_ACCESS_KEY_ID",
    "secretAccessKey": "AWS_SECRET_ACCESS_KEY"
}

Usage

Provides single CLI command: as-replace-instances, used like

as-replace-instances -r <region> -g <autoscaling-group>

• -r is the AWS region within which the specified AutoScaling Group exists
• -g is the name of the AutoScaling Group on which to act

or to use its javascript library:

var as = require('as-replace-instances');