Container Infrastructure Management Service for OpenStack
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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from oslo_utils import timeutils
import magnum.conf
from magnum.objects import magnum_service
CONF = magnum.conf.CONF
class ServiceGroup(object):
def __init__(self):
self.service_down_time = CONF.service_down_time
def service_is_up(self, member):
if not isinstance(member, magnum_service.MagnumService):
raise TypeError
if member.forced_down:
return False
last_heartbeat = (member.last_seen_up or
member.updated_at or member.created_at)
now = timeutils.utcnow(True)
elapsed = timeutils.delta_seconds(last_heartbeat, now)
is_up = abs(elapsed) <= self.service_down_time
return is_up