show-ips-for-asg

README.md

To use;

docker run --rm -it ddub/show-ips-for-asg 'autoscale_group_name'

Dockerfile

FROM python:3-onbuild
RUN chmod 755 *.py
ENTRYPOINT [ "/usr/src/app/show-ips-for-asg.py" ]

requirements.txt

boto

show-ips-for-asg.py

#!/usr/local/bin/python

import boto.ec2
import sys
import os

conn = boto.ec2.connect_to_region(
    os.getenv('AWS_DEFAULT_REGION', 'us-east-1')
)
reservations = conn.get_all_instances(
    filters={"tag:aws:autoscaling:groupName": sys.argv[1]}
)
print (' '.join([i.private_ip_address
                 for r in reservations
                 for i in r.instances
                 if i.state == 'running']))