from libcloud.loadbalancer.types import Provider from libcloud.loadbalancer.providers import get_driver cls = get_driver(Provider.ELB) driver = cls(aws_access_key_id='your_access_key_id', aws_secret_access_key='your_secret_access_key', region='your_region') name = 'MyBalancer' protocol = 'http' port = 80 members = [('<backend_ip1>', port), ('<backend_ip2>', port), ('<backend_ip3>', port)] balancer = driver.create_balancer(name, protocol, port, members=members) algorithm = 'round-robin' balancer.balancer_algorithm = algorithm hc_interval = 10 hc_timeout = 5 hc_healthy_threshold = 3 hc_unhealthy_threshold = 5 balancer.set_healthcheck(hc_interval, hc_timeout, hc_healthy_threshold, hc_unhealthy_threshold) all_members = balancer.balancer_members for member in all_members: if member.state == 'ENABLED': member.service.down() if load > threshold: ip_address = '<new_backend_ip>' port = 80 balancer.attach_member(ip_address, port) if load < threshold: member_to_remove = '<backend_member_to_remove>' balancer.detach_member(member_to_remove)