fabfile.py

# -*- coding: utf-8 -*-

from fabric.api import (
    env,
    serial,
    settings,
    sudo,
    task,
    warn_only,
)

env.hosts = [
    'localhost',
]

env.user = 'ec2-user'
env.key_filename = '/home/andre/.ssh/aws.pem'

env.start_command = 'service wowza start'
env.stop_command = 'service wowza stop'

env.max_retries = 10


class WowzaException(Exception):
    pass


@task
@serial
def restart_wowza():
    with warn_only():
        sudo(env.stop_command)

    with settings(abort_exception=WowzaException):
        for i in range(env.max_retries):
            try:
                sudo(env.start_command)
            except WowzaException:
                continue
            else:
                break