def fetch_server(self, server_id):
"""Fetch fresh server object from Nova.
Log warnings and return None for non-critical API errors.
Use this method in various ``check_*_complete`` resource methods,
where intermittent errors can be tolerated.
"""
server = None
try:
server = self.client().servers.get(server_id)
except exceptions.OverLimit as exc:
LOG.warning(_LW("Received an OverLimit response when "
"fetching server (%(id)s) : %(exception)s"),
{'id': server_id,
'exception': exc})
except exceptions.ClientException as exc:
if ((getattr(exc, 'http_status', getattr(exc, 'code', None)) in
(500, 503))):
LOG.warning(_LW("Received the following exception when "
"fetching server (%(id)s) : %(exception)s"),
{'id': server_id,
'exception': exc})
else:
raise
return server
def stop_sandbox(self, context, sandbox_id):
elevated = context.elevated()
novaclient = nova.NovaClient(elevated)
server_name = self._find_server_by_container_id(sandbox_id)
if not server_name:
LOG.warning(
_LW("Cannot find server name for sandbox %s") % sandbox_id)
return
novaclient.stop_server(server_name)
def get_addresses(self, server):
"""Return the server's IP address, fetching it from Nova."""
try:
server_id = self.get_server_id(server)
server = self.client().servers.get(server_id)
except exceptions.NotFound as ex:
LOG.warning(_LW('Instance (%(server)s) not found: %(ex)s'),
{'server': server, 'ex': ex})
else:
return server.addresses
def refresh_server(self, server):
"""Refresh server's attributes.
Also log warnings for non-critical API errors.
"""
try:
server.get()
except exceptions.OverLimit as exc:
LOG.warning(_LW("Server %(name)s (%(id)s) received an OverLimit "
"response during server.get(): %(exception)s"),
{'name': server.name,
'id': server.id,
'exception': exc})
except exceptions.ClientException as exc:
if ((getattr(exc, 'http_status', getattr(exc, 'code', None)) in
(500, 503))):
LOG.warning(_LW('Server "%(name)s" (%(id)s) received the '
'following exception during server.get(): '
'%(exception)s'),
{'name': server.name,
'id': server.id,
'exception': exc})
else:
raise
def safe_rstrip(value, chars=None):
"""Removes trailing characters from a string if that does not make it empty
:param value: A string value that will be stripped.
:param chars: Characters to remove.
:return: Stripped value.
"""
if not isinstance(value, six.string_types):
LOG.warning(
_LW("Failed to remove trailing character. Returning original object. "
"Supplied object is not a string: %s."), value)
return value
return value.rstrip(chars) or value
def get_sandbox_id(self, container):
if container.meta:
return container.meta.get('sandbox_id', None)
else:
LOG.warning(_LW("Unexpected missing of sandbox_id"))
return None