ASG Spincycle

Rotates instances in autoscaling groups that are using an outdated launch configuration

Usage

The script assumes you have the below required environment variables set so boto3 can authenticate to AWS. You can read more about the boto3 auth requirements here

• AWS_ACCESS_KEY_ID
• AWS_SECRET_ACCESS_KEY
• AWS_DEFAULT_REGION

pip install -r requirements.txt
python3 spincycle.py

The script takes the following command line arguments

usage: spincycle.py [-h] --asg-name ASG_NAME [--sleep-time SLEEP_TIME]

Rotate old instances from an ASG

optional arguments:
  -h, --help            show this help message and exit
  --asg-name ASG_NAME, -a ASG_NAME
                        The name of the ASG you want to rotate
  --sleep-time SLEEP_TIME, -s SLEEP_TIME
                        The time you want to wait between rotating instances

--sleep-time is technically not required and defaults to 600 seconds if not specified.

If you prefer to run the script via docker

docker run -it -e AWS_ACCESS_KEY_ID=xxx \
-e AWS_SECRET_ACCESS_KEY=yyy \
-e AWS_DEFULT_REGION=us-west-2 \
jensendw/asg-spincycle -a myawesomeasg -s 500

Contributing

1. Fork it ( https://github.com/jensendw/asg-spincycle )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

asg-spincycle