Build a load balancer with Fog

lb.rb

require 'fog/openstack'

conn = {
  openstack_auth_url:     ENV["OS_AUTH_URL"],
  openstack_username:     ENV["OS_USERNAME"],
  openstack_api_key:      ENV["OS_PASSWORD"],
  openstack_project_name: ENV["OS_PROJECT_NAME"],
  openstack_domain_id:    ENV["OS_USER_DOMAIN_NAME"]
}

fog = Fog::Network::OpenStack.new(conn)

subnet = fog.subnets.first

unless subnet
  default_cidr = '192.168.0.0/24'
  default_dns  = ['8.8.8.8', '8.8.4.4']
  default_name = 'default'
  ext_net = fog.networks.all.find{|n| n.router_external}

  network = fog.networks.create name:            default_name
  subnet  = fog.subnets.create  name:            default_name,
                                cidr:            default_cidr,
                                network_id:      network.id,
                                ip_version:      4,
                                dns_nameservers: default_dns,
                                tenant_id:       project_uuid

  router = fog.routers.create name:                  default_name,
                              external_gateway_info: external_network.id

  fog.add_router_interface router.id, subnet.id
end

lb_pool = fog.lb_pools.create subnet_id: subnet.id,
                              protocol:  'HTTP',
                              lb_method: 'ROUND_ROBIN'

lb_member = fog.lb_members.create pool_id:       lb_pool.id,
                                  address:       '1.2.3.4',
                                  protocol_port: 80,
                                  weight:        1