class UnixDomainMetadataProxy(object):
OPTS = [
cfg.StrOpt('metadata_proxy_socket',
default='$state_path/metadata_proxy',
help=_('Location for Metadata Proxy UNIX domain socket')),
cfg.IntOpt('metadata_workers',
default=utils.cpu_count() // 2,
help=_('Number of separate worker processes for metadata '
'server')),
cfg.IntOpt('metadata_backlog',
default=4096,
help=_('Number of backlog requests to configure the '
'metadata server socket with'))
]
def __init__(self, conf):
self.conf = conf
dirname = os.path.dirname(cfg.CONF.metadata_proxy_socket)
if os.path.isdir(dirname):
try:
os.unlink(cfg.CONF.metadata_proxy_socket)
except OSError:
with excutils.save_and_reraise_exception() as ctxt:
if not os.path.exists(cfg.CONF.metadata_proxy_socket):
ctxt.reraise = False
else:
os.makedirs(dirname, 0o755)
self._init_state_reporting()
def _init_state_reporting(self):
self.context = context.get_admin_context_without_session()
self.state_rpc = agent_rpc.PluginReportStateAPI(topics.PLUGIN)
self.agent_state = {
'binary': 'neutron-metadata-agent',
'host': cfg.CONF.host,
'topic': 'N/A',
'configurations': {
'metadata_proxy_socket': cfg.CONF.metadata_proxy_socket,
'nova_metadata_ip': cfg.CONF.nova_metadata_ip,
'nova_metadata_port': cfg.CONF.nova_metadata_port,
},
'start_flag': True,
'agent_type': n_const.AGENT_TYPE_METADATA}
report_interval = cfg.CONF.AGENT.report_interval
if report_interval:
self.heartbeat = loopingcall.FixedIntervalLoopingCall(
self._report_state)
self.heartbeat.start(interval=report_interval)
def _report_state(self):
try:
self.state_rpc.report_state(
self.context,
self.agent_state,
use_call=self.agent_state.get('start_flag'))
except AttributeError:
# This means the server does not support report_state
LOG.warn(_LW('Neutron server does not support state report.'
' State report for this agent will be disabled.'))
self.heartbeat.stop()
return
except Exception:
LOG.exception(_LE("Failed reporting state!"))
return
self.agent_state.pop('start_flag', None)
def run(self):
server = UnixDomainWSGIServer('neutron-metadata-agent')
server.start(MetadataProxyHandler(self.conf),
self.conf.metadata_proxy_socket,
workers=self.conf.metadata_workers,
backlog=self.conf.metadata_backlog)
server.wait()
GROUP_MODE = 'group'
ALL_MODE = 'all'
SOCKET_MODES = (DEDUCE_MODE, USER_MODE, GROUP_MODE, ALL_MODE)
UNIX_DOMAIN_METADATA_PROXY_OPTS = [
cfg.StrOpt('metadata_proxy_socket_mode',
default=DEDUCE_MODE,
choices=SOCKET_MODES,
help=_("Metadata Proxy UNIX domain socket mode, 3 values "
"allowed: "
"'deduce': deduce mode from metadata_proxy_user/group "
"values, "
"'user': set metadata proxy socket mode to 0o644, to "
"use when metadata_proxy_user is agent effective user "
"or root, "
"'group': set metadata proxy socket mode to 0o664, to "
"use when metadata_proxy_group is agent effective "
"group or root, "
"'all': set metadata proxy socket mode to 0o666, to use "
"otherwise.")),
cfg.IntOpt('metadata_workers',
default=utils.cpu_count() // 2,
help=_('Number of separate worker processes for metadata '
'server (defaults to half of the number of CPUs)')),
cfg.IntOpt('metadata_backlog',
default=4096,
help=_('Number of backlog requests to configure the '
'metadata server socket with'))
]
USER_MODE = 'user'
GROUP_MODE = 'group'
ALL_MODE = 'all'
SOCKET_MODES = (DEDUCE_MODE, USER_MODE, GROUP_MODE, ALL_MODE)
UNIX_DOMAIN_METADATA_PROXY_OPTS = [
cfg.StrOpt('metadata_proxy_socket_mode',
default=DEDUCE_MODE,
choices=SOCKET_MODES,
help=_("Metadata Proxy UNIX domain socket mode, 3 values "
"allowed: "
"'deduce': deduce mode from metadata_proxy_user/group "
"values, "
"'user': set metadata proxy socket mode to 0o644, to "
"use when metadata_proxy_user is agent effective user "
"or root, "
"'group': set metadata proxy socket mode to 0o664, to "
"use when metadata_proxy_group is agent effective "
"group or root, "
"'all': set metadata proxy socket mode to 0o666, to use "
"otherwise.")),
cfg.IntOpt('metadata_workers',
default=utils.cpu_count() // 2,
help=_('Number of separate worker processes for metadata '
'server')),
cfg.IntOpt('metadata_backlog',
default=4096,
help=_('Number of backlog requests to configure the '
'metadata server socket with'))
]
cfg.StrOpt('ha_confs_path',
default='$state_path/ha_confs',
help=_('Location to store keepalived/conntrackd '
'config files')),
cfg.StrOpt('ha_vrrp_auth_type',
default='PASS',
choices=keepalived.VALID_AUTH_TYPES,
help=_('VRRP authentication type')),
cfg.StrOpt('ha_vrrp_auth_password',
help=_('VRRP authentication password'),
secret=True),
cfg.IntOpt('ha_vrrp_advert_int',
default=2,
help=_('The advertisement interval in seconds')),
cfg.IntOpt('ha_keepalived_state_change_server_threads',
default=(1 + common_utils.cpu_count()) // 2,
min=1,
help=_('Number of concurrent threads for '
'keepalived server connection requests.'
'More threads create a higher CPU load '
'on the agent node.')),
cfg.IntOpt('ha_vrrp_health_check_interval',
default=0,
help=_('The VRRP health check interval in seconds. Values > 0 '
'enable VRRP health checks. Setting it to 0 disables '
'VRRP health checks. Recommended value is 5. '
'This will cause pings to be sent to the gateway '
'IP address(es) - requires ICMP_ECHO_REQUEST '
'to be enabled on the gateway. '
'If gateway fails, all routers will be reported '
'as master, and master election will be repeated '
