def _add_instance(elb, elb_zones, unregistered_instances):
"""Prompts the user for an instance to add, then adds that instance
to an ELB."""
_pretty_print_elb_zones(elb, elb_zones)
_pretty_print_elb_instances(elb, unregistered_instances, False)
unreg_instances = [(inst.name, inst) for inst in unregistered_instances]
instance_to_add = common.prompt_choice("Add", unreg_instances)
if common.prompt_confirmation("Are you sure you want to add {}".format(
instance_to_add.name)):
elb.register_instances([instance_to_add.id])
print("Instance added to ELB.")
else:
print("Instance was NOT added to ELB.")
def _remove_instance(elb, registered_instances):
"""Prompts the user for an instance to remove from the ELB, then removes
it. Asks for a confirmation before actually removing it."""
_pretty_print_elb_instances(elb, registered_instances, True)
reg_instances = [(inst.name, inst) for inst in registered_instances]
if len(reg_instances) == 0:
print("Cannot remove an instance since none are registered to this ELB.")
return
instance_to_remove = common.prompt_choice("Remove", reg_instances)
if common.prompt_confirmation("Are you sure you want to remove {}".format(
instance_to_remove.name)):
elb.deregister_instances([instance_to_remove.id])
print("Instance removed from ELB.")
else:
print("Instance was NOT removed from ELB.")