+ async def _try_endpoint(self, endpoint, cacert):
+ success = False
+ result = None
+ new_endpoints = []
+
+ self.endpoint = endpoint
+ self.cacert = cacert
+ await self.open()
+ try:
+ result = await self.login()
+ if 'discharge-required-error' in result['response']:
+ log.info('Macaroon discharge required, disconnecting')
+ else:
+ # successful login!
+ log.info('Authenticated')
+ success = True
+ except JujuAPIError as e:
+ if e.error_code != 'redirection required':
+ raise
+ log.info('Controller requested redirect')
+ redirect_info = await self.redirect_info()
+ redir_cacert = redirect_info['ca-cert']
+ new_endpoints = [
+ ("{value}:{port}".format(**s), redir_cacert)
+ for servers in redirect_info['servers']
+ for s in servers if s["scope"] == 'public'
+ ]
+ finally:
+ if not success:
+ await self.close()
+ return success, result, new_endpoints
+
+ async def reconnect(self):
+ """ Force a reconnection.
+ """
+ monitor = self.monitor
+ if monitor.reconnecting.locked() or monitor.close_called.is_set():
+ return
+ async with monitor.reconnecting:
+ await self.close()
+ await self._connect()
+
+ async def _connect(self):
+ endpoints = [(self._endpoint, self._cacert)]
+ while endpoints:
+ _endpoint, _cacert = endpoints.pop(0)
+ success, result, new_endpoints = await self._try_endpoint(
+ _endpoint, _cacert)
+ if success:
+ break
+ endpoints.extend(new_endpoints)
+ else:
+ # ran out of endpoints without a successful login
+ raise Exception("Couldn't authenticate to {}".format(
+ self._endpoint))
+
+ response = result['response']
+ self.info = response.copy()
+ self.build_facades(response.get('facades', {}))
+ self.loop.create_task(self.pinger())
+ self.monitor.pinger_stopped.clear()
+