spin up an ec2 instance and tear it down upon completion from AWS lambda

dynamic_ec2.py

ec2_client = boto3.client('ec2')

user_data = """#!/bin/bash
sudo apt-get update
curl "https://bootstrap.pypa.io/get-pip.py" -o "get-pip.py"
sudo python3 get-pip.py
sudo pip3 install boto3
sudo apt-get install -y libgtk2.0-dev
sudo pip3 install opencv-python
echo "{}" >> {}
python3 {} {}
sudo shutdown -H now"""

#
# launch ec2 instance
#

script = 'ec2_freeze_frames.py'
with open(os.path.join(os.path.dirname(os.path.realpath(__file__)), script), 'r') as f:
    s = f.read()

u_d = user_data.format(s, script, script, params...)

instance = ec2_client.run_instances(
    ImageId='ami-66506c1c',
    InstanceType='t2.large',
    MinCount=1,  # required by boto, even though it's kinda obvious.
    MaxCount=1,
    InstanceInitiatedShutdownBehavior='terminate',  # make shutdown in script terminate ec2
    IamInstanceProfile={'Name': os.environ['EC2_WORKER']},
    UserData=u_d  # file to run on instance init.
)
print(instance)
assert instance['ResponseMetadata']['HTTPStatusCode'] == 200, instance