# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
#
# 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.
import uuid
from datetime import datetime, timedelta
from .mem_store import get_all_sp, get_primary_sp, get_sp_by, update_sp # noqa
system_state = "ready"
[docs]def get_system_state():
global system_state
return system_state
[docs]def set_system_state(state):
global system_state
system_state = state
return get_system_state()
[docs]def update_sp_state(project, now, heartbeat_timeout=10):
valid_starting = now - timedelta(seconds=heartbeat_timeout)
# mark all late SP as offline and not primary
# print(f"{now=} {valid_starting=}")
for sp in get_all_sp(project):
if datetime.fromisoformat(sp["last_heartbeat"]) < valid_starting:
sp["state"] = "offline"
sp["primary"] = False
else:
sp["state"] = "online"
update_sp(sp)
[docs]def simple_PSP_policy(incoming_sp, now):
"""Find the primary SP (PSP).
If there is no PSP or current PSP timeout, choose one without heartbeat timeout.
"""
project = incoming_sp["project"]
sp = get_sp_by(dict(project=project, sp_end_point=incoming_sp["sp_end_point"]))
if sp:
sp["last_heartbeat"] = now.isoformat()
update_sp(sp)
else:
update_sp(
dict(
project=incoming_sp["project"],
sp_end_point=incoming_sp["sp_end_point"],
last_heartbeat=now.isoformat(),
state="online",
primary=False,
)
)
psp = get_primary_sp(project)
if not psp:
psp = get_sp_by(dict(project=project, state="online"))
if psp:
print(f"{psp['sp_end_point']} online")
psp["primary"] = True
psp["service_session_id"] = str(uuid.uuid4())
update_sp(psp)
return psp