def launch_instance(connect):
""" Launch EC2 instance. Thread-safe.
connect - whether to perform connection test (up to 1 min usually)
"""
launch = aws_ec2.launch_instance(connect)
l = threading.Lock()
l.acquire()
instances.append(launch[0].id)
l.release()
def scale_up_with_new_instance(config):
"""Scale up with a new instance that first gets configured"""
logger = logging.getLogger(__name__)
logger.info("Upscaling with the new instance started.")
# Launch instance
logger.info("Launching an instance.")
instance, _ = aws_ec2.launch_instance()
# Start app
logger.info("Performing deployment operations.")
aws_ec2.app_predeployment(config)
aws_ec2.deploy_app_at_instance(config, instance)
aws_ec2.app_postdeployment(config)
# Register instance at load balancer
logger.info("Registering an instance at the load balancer")
elb = aws_ec2_elb.get_load_balancer(config.get("region"), config.get("elb_name"))
elb.register_instances([instance.id])
# Update config
instances = config.get_list("instances")
instances.append(instance.id)
config.set_list("instances", instances)
