def create_elastic_load_balancer():
elb_conn = get_elb_connection_obj()
# setup availability zones to which this lb forwards requests
ports = [(80, cfg['webapp_instance_port'], 'http'), (443, cfg['webapp_instance_port'], 'http')]
subnets = get_vpc_subnets()
elb_sg = get_security_group(cfg['webapp_elb_sg_name'])
# create the load balancer. NB: zones must be None when associating elb to non-default vpc
elb = elb_conn.create_load_balancer(name=cfg['elb_name'], zones=None, listeners=ports,
subnets=subnets, security_groups=[elb_sg.id])
# Add the health check configuration to the ELB.
hc = HealthCheck(
interval=10,
healthy_threshold=2,
unhealthy_threshold=3,
target='HTTP:' + str(cfg['webapp_instance_port']) + cfg['health_check_url']
)
elb.configure_health_check(hc)
print 'elastic load balancer created: ', elb
print 'elastic load balancer dns: ', elb.dns_name
return elb
def create_cname_to_elb(cname, elb_name=None, app_domain=None):
cname = formatDomain(cname)
if not elb_name:
print 'elastic load balancer name not passed to script. querying aws based on configuration file'
elb_name = cfg['elb_name']
if not elb_name:
raise Exception("ERROR! elastic load balancer name not specified on cmd line or in configuration file")
elb_conn = get_elb_connection_obj()
elb = elb_conn.get_all_load_balancers(load_balancer_names=[elb_name])[0]
print 'elb: %s' % elb
elb_dns_name = elb.dns_name
if not app_domain:
app_domain = formatDomain(cfg['app_domain_name'])
print 'adding cname to domain: %s' % app_domain
route53 = get_route53_connection_obj()
hosted_zone = route53.get_zone(app_domain)
print 'hosted zone discovered: %s' % hosted_zone
print 'zone id: %s' % hosted_zone.id
zone_id = hosted_zone.id
changes = ResourceRecordSets(route53, zone_id)
change = changes.add_change("CREATE", cname, "CNAME", ttl=60)
change.add_value(elb_dns_name)
# try:
changes.commit()
# except Exception, e:
# logging.error(e)
# elb_id =
# if not elb_id:
# raise Exception("ERROR! domain name not specified on cmd line or in configuration file")
# ok we have a domain name. it must end with a period before setting it up as a hosted zone
print 'creating route53 hosted zone from domain name %s' % cname
