def connect(self, raise_on_any_error=False):
"""
Connect to hosts in hosts list. Returns status of connect as a dict.
:param raise_on_any_error: Optional Raise an exception even if connecting to one
of the hosts fails.
:type raise_on_any_error: ``boolean``
:rtype: ``dict`` of ``str`` to ``dict``
"""
results = {}
for host in self._hosts:
while not concurrency_lib.is_green_pool_free(self._pool):
concurrency_lib.sleep(self._scan_interval)
self._pool.spawn(self._connect,
host=host,
results=results,
raise_on_any_error=raise_on_any_error)
concurrency_lib.green_pool_wait_all(self._pool)
if self._successful_connects < 1:
# We definitely have to raise an exception in this case.
LOG.error('Unable to connect to any of the hosts.',
extra={'connect_results': results})
msg = (
'Unable to connect to any one of the hosts: %s.\n\n connect_errors=%s'
% (self._hosts, json.dumps(results, indent=2)))
raise NoHostsConnectedToException(msg)
return results
def _execute_in_pool(self, execute_method, **kwargs):
results = {}
for host in self._bad_hosts.keys():
results[host] = self._bad_hosts[host]
for host in self._hosts_client.keys():
while not self._pool.free():
concurrency_lib.sleep(self._scan_interval)
self._pool.spawn(execute_method, host=host, results=results, **kwargs)
concurrency_lib.green_pool_wait_all(self._pool)
return results