def _write_config(server, state):
"""Write the configuration file."""
dhcpd_config, interfaces_config = state.get_config(server)
try:
sudo_write_file(server.config_filename,
dhcpd_config.encode("utf-8"),
mode=0o640)
sudo_write_file(
server.interfaces_filename,
interfaces_config.encode("utf-8"),
mode=0o640,
)
except ExternalProcessError as e:
# ExternalProcessError.__str__ contains a generic failure message
# as well as the command and its error output. On the other hand,
# ExternalProcessError.output_as_unicode contains just the error
# output which is probably the best information on what went wrong.
# Log the full error information, but keep the exception message
# short and to the point.
maaslog.error(
"Could not rewrite %s server configuration (for network "
"interfaces %s): %s",
server.descriptive_name,
interfaces_config,
str(e),
)
raise CannotConfigureDHCP(
"Could not rewrite %s server configuration: %s" %
(server.descriptive_name, e.output_as_unicode))
def eb(failure):
message = "%s server failed to %s: %s" % (server.descriptive_name,
action, failure.value)
# A ServiceActionError will have already been logged by the
# service monitor, so don't log a second time.
if not failure.check(ServiceActionError):
maaslog.error(message)
# Squash everything into CannotConfigureDHCP.
raise CannotConfigureDHCP(message) from failure.value