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import errno
import json
import rados
import rbd
import re
import traceback
from datetime import datetime
from threading import Condition, Lock, Thread
from .common import get_rbd_pools
from .schedule import LevelSpec, Interval, StartTime, Schedule, Schedules
class TrashPurgeScheduleHandler:
MODULE_OPTION_NAME = "trash_purge_schedule"
SCHEDULE_OID = "rbd_trash_purge_schedule"
REFRESH_DELAY_SECONDS = 60.0
lock = Lock()
condition = Condition(lock)
thread = None
def __init__(self, module):
self.module = module
self.log = module.log
self.last_refresh_pools = datetime(1970, 1, 1)
self.init_schedule_queue()
self.thread = Thread(target=self.run)
self.thread.start()
def run(self):
try:
self.log.info("TrashPurgeScheduleHandler: starting")
while True:
refresh_delay = self.refresh_pools()
with self.lock:
(ns_spec, wait_time) = self.dequeue()
if not ns_spec:
self.condition.wait(min(wait_time, refresh_delay))
continue
pool_id, namespace = ns_spec
self.trash_purge(pool_id, namespace)
with self.lock:
self.enqueue(datetime.now(), pool_id, namespace)
except Exception as ex:
self.log.fatal("Fatal runtime error: {}\n{}".format(
ex, traceback.format_exc()))
def trash_purge(self, pool_id, namespace):
try:
with self.module.rados.open_ioctx2(int(pool_id)) as ioctx:
ioctx.set_namespace(namespace)
rbd.RBD().trash_purge(ioctx, datetime.now())
except Exception as e:
self.log.error("exception when purgin {}/{}: {}".format(
pool_id, namespace, e))
def init_schedule_queue(self):
self.queue = {}
self.pools = {}
self.refresh_pools()
self.log.debug("TrashPurgeScheduleHandler: queue is initialized")
def load_schedules(self):
self.log.info("TrashPurgeScheduleHandler: load_schedules")
schedules = Schedules(self)
schedules.load()
self.schedules = schedules
def refresh_pools(self):
elapsed = (datetime.now() - self.last_refresh_pools).total_seconds()
if elapsed < self.REFRESH_DELAY_SECONDS:
return self.REFRESH_DELAY_SECONDS - elapsed
self.log.debug("TrashPurgeScheduleHandler: refresh_pools")
with self.lock:
self.load_schedules()
if not self.schedules:
self.log.debug("TrashPurgeScheduleHandler: no schedules")
self.pools = {}
self.queue = {}
self.last_refresh_pools = datetime.now()
return self.REFRESH_DELAY_SECONDS
pools = {}
for pool_id, pool_name in get_rbd_pools(self.module).items():
if not self.schedules.intersects(
LevelSpec.from_pool_spec(pool_id, pool_name)):
continue
with self.module.rados.open_ioctx2(int(pool_id)) as ioctx:
self.load_pool(ioctx, pools)
with self.lock:
self.refresh_queue(pools)
self.pools = pools
self.last_refresh_pools = datetime.now()
return self.REFRESH_DELAY_SECONDS
def load_pool(self, ioctx, pools):
pool_id = str(ioctx.get_pool_id())
pool_name = ioctx.get_pool_name()
pools[pool_id] = {}
pool_namespaces = ['']
self.log.debug("load_pool: {}".format(pool_name))
try:
pool_namespaces += rbd.RBD().namespace_list(ioctx)
except rbd.OperationNotSupported:
self.log.debug("namespaces not supported")
except Exception as e:
self.log.error("exception when scanning pool {}: {}".format(
pool_name, e))
for namespace in pool_namespaces:
pools[pool_id][namespace] = pool_name
def rebuild_queue(self):
now = datetime.now()
# don't remove from queue "due" images
now_string = datetime.strftime(now, "%Y-%m-%d %H:%M:00")
for schedule_time in list(self.queue):
if schedule_time > now_string:
del self.queue[schedule_time]
if not self.schedules:
return
for pool_id, namespaces in self.pools.items():
for namespace in namespaces:
self.enqueue(now, pool_id, namespace)
self.condition.notify()
def refresh_queue(self, current_pools):
now = datetime.now()
for pool_id, namespaces in self.pools.items():
for namespace in namespaces:
if pool_id not in current_pools or \
namespace not in current_pools[pool_id]:
self.remove_from_queue(pool_id, namespace)
for pool_id, namespaces in current_pools.items():
for namespace in namespaces:
if pool_id not in self.pools or \
namespace not in self.pools[pool_id]:
self.enqueue(now, pool_id, namespace)
self.condition.notify()
def enqueue(self, now, pool_id, namespace):
schedule = self.schedules.find(pool_id, namespace)
if not schedule:
self.log.debug(
"TrashPurgeScheduleHandler: no schedule for {}/{}".format(
pool_id, namespace))
return
schedule_time = schedule.next_run(now)
if schedule_time not in self.queue:
self.queue[schedule_time] = []
self.log.debug(
"TrashPurgeScheduleHandler: scheduling {}/{} at {}".format(
pool_id, namespace, schedule_time))
ns_spec = (pool_id, namespace)
if ns_spec not in self.queue[schedule_time]:
self.queue[schedule_time].append((pool_id, namespace))
def dequeue(self):
if not self.queue:
return None, 1000
now = datetime.now()
schedule_time = sorted(self.queue)[0]
if datetime.strftime(now, "%Y-%m-%d %H:%M:%S") < schedule_time:
wait_time = (datetime.strptime(schedule_time,
"%Y-%m-%d %H:%M:%S") - now)
return None, wait_time.total_seconds()
namespaces = self.queue[schedule_time]
namespace = namespaces.pop(0)
if not namespaces:
del self.queue[schedule_time]
return namespace, 0
def remove_from_queue(self, pool_id, namespace):
self.log.debug(
"TrashPurgeScheduleHandler: descheduling {}/{}".format(
pool_id, namespace))
empty_slots = []
for schedule_time, namespaces in self.queue.items():
if (pool_id, namespace) in namespaces:
namespaces.remove((pool_id, namespace))
if not namespaces:
empty_slots.append(schedule_time)
for schedule_time in empty_slots:
del self.queue[schedule_time]
def add_schedule(self, level_spec, interval, start_time):
self.log.debug(
"TrashPurgeScheduleHandler: add_schedule: level_spec={}, interval={}, start_time={}".format(
level_spec.name, interval, start_time))
# TODO: optimize to rebuild only affected part of the queue
with self.lock:
self.schedules.add(level_spec, interval, start_time)
self.rebuild_queue()
return 0, "", ""
def remove_schedule(self, level_spec, interval, start_time):
self.log.debug(
"TrashPurgeScheduleHandler: remove_schedule: level_spec={}, interval={}, start_time={}".format(
level_spec.name, interval, start_time))
# TODO: optimize to rebuild only affected part of the queue
with self.lock:
self.schedules.remove(level_spec, interval, start_time)
self.rebuild_queue()
return 0, "", ""
def list(self, level_spec):
self.log.debug(
"TrashPurgeScheduleHandler: list: level_spec={}".format(
level_spec.name))
with self.lock:
result = self.schedules.to_list(level_spec)
return 0, json.dumps(result, indent=4, sort_keys=True), ""
def status(self, level_spec):
self.log.debug(
"TrashPurgeScheduleHandler: status: level_spec={}".format(
level_spec.name))
scheduled = []
with self.lock:
for schedule_time in sorted(self.queue):
for pool_id, namespace in self.queue[schedule_time]:
if not level_spec.matches(pool_id, namespace):
continue
pool_name = self.pools[pool_id][namespace]
scheduled.append({
'schedule_time' : schedule_time,
'pool_id' : pool_id,
'pool_name' : pool_name,
'namespace' : namespace
})
return 0, json.dumps({'scheduled' : scheduled}, indent=4,
sort_keys=True), ""
def handle_command(self, inbuf, prefix, cmd):
level_spec_name = cmd.get('level_spec', "")
try:
level_spec = LevelSpec.from_name(self, level_spec_name,
allow_image_level=False)
except ValueError as e:
return -errno.EINVAL, '', "Invalid level spec {}: {}".format(
level_spec_name, e)
if prefix == 'add':
return self.add_schedule(level_spec, cmd['interval'],
cmd.get('start_time'))
elif prefix == 'remove':
return self.remove_schedule(level_spec, cmd.get('interval'),
cmd.get('start_time'))
elif prefix == 'list':
return self.list(level_spec)
elif prefix == 'status':
return self.status(level_spec)
raise NotImplementedError(cmd['prefix'])
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