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_database_sg(vpc_id):
db_sg = conn.create_security_group(cfg['database_sg_name'], 'security group for rds', vpc_id=vpc_id)
print "rds security group just created. name: %s id: %s" % (db_sg.name, db_sg.id)
# stupid. the only way to remove the default 'All' egress rule...
conn.revoke_security_group_egress(db_sg.id, '-1', from_port="0", to_port="65535", cidr_ip='0.0.0.0/0')
# only allow instances associated with the webapp security group to access our db instance
webapp_sg = get_security_group(cfg['webapp_sg_name'])
db_sg.authorize(ip_protocol='tcp', from_port=3306, to_port=3306, cidr_ip=None, src_group=webapp_sg)
def create_ec2_from_ami():
ec2 = get_ec2_connection_obj()
# TODO!!! need to check for existence of this key before blindly creating it...
print 'creating ec2 ssh key pair with name %s' % cfg['ec2_ssh_key_name']
key = ec2.create_key_pair(cfg['ec2_ssh_key_name'])
key.save(cfg['ec2_ssh_key_local_path'])
print 'just saved private key pem file to %s' % cfg['ec2_ssh_key_local_path']
security_group = get_security_group(cfg['webapp_sg_name'])
print 'utilizing security group: %s' % security_group
print 'security group id: %s' % security_group.id
subnet_list = get_vpc_subnets()
ec2.run_instances(cfg['ec2_ami'],
key_name=cfg['ec2_ssh_key_name'],
security_group_ids=[security_group.id],
subnet_id=subnet_list[0],
instance_type=cfg['ec2_instance_type'])
def delete_security_group(sg_name):
sg = get_security_group(sg_name)
if sg:
print "deleting security group: " + sg.name
sg.delete()
