def provider_config(provider_config_function):
"""Verify a provider (e.g. AWS EC2 or Google Compute Engine) is specified and properly configured.
Usage: provider_config(aws.maybe_config() or gce.maybe_config() ...) for all providers potentially to be used.
"""
if provider_config_function:
return provider_config_function()
elif env.get("provider"):
error(
"Cloud provider set to '%s' but no provider_config_function supplied for that provider. Cannot proceed."
% env.provider
)
else:
error("No cloud provider set. Please configure the 'provider' setting.")
return False
def virtual_ip_assign():
"""Assigns virtual IP address to currently use()'d node."""
if len(env.nodes) == 1:
env.provider_virtual_ip_assign_function()
else:
error("Cannot assign virtual IP unless exactly one node is specified.")
