Run a system command in a Lambda

lambda_handler.py

import subprocess
import logging

logger = logging.getLogger()
logger.setLevel(logging.INFO)

def lambda_handler(event, context):
    """
    Runs a shell command and returns the output code
    STDOUT & STDERR are logged into Cloudwatch
    """
    cmd = event['cmd']
    logger.info('Executing command: {}'.format(cmd))
    ret = subprocess.run(
        args=cmd,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
        shell=True,
    )
    if ret.stdout:
        logger.info(ret.stdout)
    if ret.stderr:
        logger.error(ret.stderr)
    return ret.returncode