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artiq_ctlmgr: refactor into artiq.devices.ctlmgr

This commit is contained in:
Robert Jördens 2016-01-26 15:21:10 -07:00
parent be5162d60f
commit cda4a0765d
2 changed files with 261 additions and 242 deletions
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254
artiq/devices/ctlmgr.py Normal file
View File

@ -0,0 +1,254 @@
import asyncio
import logging
import subprocess
import shlex
import socket
from artiq.protocols.sync_struct import Subscriber
from artiq.protocols.pc_rpc import AsyncioClient
from artiq.protocols.logging import parse_log_message, log_with_name
from artiq.tools import Condition, TaskObject
logger = logging.getLogger(__name__)
class Controller:
def __init__(self, name, ddb_entry):
self.name = name
self.command = ddb_entry["command"]
self.retry_timer = ddb_entry.get("retry_timer", 5)
self.retry_timer_backoff = ddb_entry.get("retry_timer_backoff", 1.1)
self.host = ddb_entry["host"]
self.port = ddb_entry["port"]
self.ping_timer = ddb_entry.get("ping_timer", 30)
self.ping_timeout = ddb_entry.get("ping_timeout", 30)
self.term_timeout = ddb_entry.get("term_timeout", 30)
self.retry_timer_cur = self.retry_timer
self.retry_now = Condition()
self.process = None
self.launch_task = asyncio.Task(self.launcher())
async def end(self):
self.launch_task.cancel()
await asyncio.wait_for(self.launch_task, None)
async def _call_controller(self, method):
remote = AsyncioClient()
await remote.connect_rpc(self.host, self.port, None)
try:
targets, _ = remote.get_rpc_id()
remote.select_rpc_target(targets[0])
r = await getattr(remote, method)()
finally:
remote.close_rpc()
return r
async def _ping(self):
try:
ok = await asyncio.wait_for(self._call_controller("ping"),
self.ping_timeout)
if ok:
self.retry_timer_cur = self.retry_timer
return ok
except:
return False
async def _wait_and_ping(self):
while True:
try:
await asyncio.wait_for(self.process.wait(),
self.ping_timer)
except asyncio.TimeoutError:
logger.debug("pinging controller %s", self.name)
ok = await self._ping()
if not ok:
logger.warning("Controller %s ping failed", self.name)
await self._terminate()
return
else:
break
async def forward_logs(self, stream):
source = "controller({})".format(self.name)
while True:
try:
entry = (await stream.readline())
if not entry:
break
entry = entry[:-1]
level, name, message = parse_log_message(entry.decode())
log_with_name(name, level, message, extra={"source": source})
except:
logger.debug("exception in log forwarding", exc_info=True)
break
logger.debug("stopped log forwarding of stream %s of %s",
stream, self.name)
async def launcher(self):
try:
while True:
logger.info("Starting controller %s with command: %s",
self.name, self.command)
try:
self.process = await asyncio.create_subprocess_exec(
*shlex.split(self.command),
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
asyncio.ensure_future(self.forward_logs(
self.process.stdout))
asyncio.ensure_future(self.forward_logs(
self.process.stderr))
await self._wait_and_ping()
except FileNotFoundError:
logger.warning("Controller %s failed to start", self.name)
else:
logger.warning("Controller %s exited", self.name)
logger.warning("Restarting in %.1f seconds",
self.retry_timer_cur)
try:
await asyncio.wait_for(self.retry_now.wait(),
self.retry_timer_cur)
except asyncio.TimeoutError:
pass
self.retry_timer_cur *= self.retry_timer_backoff
except asyncio.CancelledError:
await self._terminate()
async def _terminate(self):
logger.info("Terminating controller %s", self.name)
if self.process is not None and self.process.returncode is None:
try:
await asyncio.wait_for(self._call_controller("terminate"),
self.term_timeout)
except:
logger.warning("Controller %s did not respond to terminate "
"command, killing", self.name)
try:
self.process.kill()
except ProcessLookupError:
pass
try:
await asyncio.wait_for(self.process.wait(),
self.term_timeout)
except:
logger.warning("Controller %s failed to exit, killing",
self.name)
try:
self.process.kill()
except ProcessLookupError:
pass
await self.process.wait()
logger.debug("Controller %s terminated", self.name)
def get_ip_addresses(host):
try:
addrinfo = socket.getaddrinfo(host, None)
except:
return set()
return {info[4][0] for info in addrinfo}
class Controllers:
def __init__(self):
self.host_filter = None
self.active_or_queued = set()
self.queue = asyncio.Queue()
self.active = dict()
self.process_task = asyncio.Task(self._process())
async def _process(self):
while True:
action, param = await self.queue.get()
if action == "set":
k, ddb_entry = param
if k in self.active:
await self.active[k].end()
self.active[k] = Controller(k, ddb_entry)
elif action == "del":
await self.active[param].end()
del self.active[param]
else:
raise ValueError
def __setitem__(self, k, v):
if (isinstance(v, dict) and v["type"] == "controller" and
self.host_filter in get_ip_addresses(v["host"])):
v["command"] = v["command"].format(name=k,
bind=self.host_filter,
port=v["port"])
self.queue.put_nowait(("set", (k, v)))
self.active_or_queued.add(k)
def __delitem__(self, k):
if k in self.active_or_queued:
self.queue.put_nowait(("del", k))
self.active_or_queued.remove(k)
def delete_all(self):
for name in set(self.active_or_queued):
del self[name]
async def shutdown(self):
self.process_task.cancel()
for c in self.active.values():
await c.end()
class ControllerDB:
def __init__(self):
self.current_controllers = Controllers()
def set_host_filter(self, host_filter):
self.current_controllers.host_filter = host_filter
def sync_struct_init(self, init):
if self.current_controllers is not None:
self.current_controllers.delete_all()
for k, v in init.items():
self.current_controllers[k] = v
return self.current_controllers
class ControllerManager(TaskObject):
def __init__(self, server, port, retry_master):
self.server = server
self.port = port
self.retry_master = retry_master
self.controller_db = ControllerDB()
async def _do(self):
try:
subscriber = Subscriber("devices",
self.controller_db.sync_struct_init)
while True:
try:
def set_host_filter():
s = subscriber.writer.get_extra_info("socket")
localhost = s.getsockname()[0]
self.controller_db.set_host_filter(localhost)
await subscriber.connect(self.server, self.port,
set_host_filter)
try:
await asyncio.wait_for(subscriber.receive_task, None)
finally:
await subscriber.close()
except (ConnectionAbortedError, ConnectionError,
ConnectionRefusedError, ConnectionResetError) as e:
logger.warning("Connection to master failed (%s: %s)",
e.__class__.__name__, str(e))
else:
logger.warning("Connection to master lost")
logger.warning("Retrying in %.1f seconds", self.retry_master)
await asyncio.sleep(self.retry_master)
except asyncio.CancelledError:
pass
finally:
await self.controller_db.current_controllers.shutdown()
def retry_now(self, k):
"""If a controller is disabled and pending retry, perform that retry
now."""
self.controller_db.current_controllers.active[k].retry_now.notify()

249
artiq/frontend/artiq_ctlmgr.py
View File

@ -5,249 +5,13 @@ import atexit
import argparse import argparse
import os import os
import logging import logging
import subprocess
import shlex
import socket
import platform import platform
from artiq.protocols.sync_struct import Subscriber from artiq.protocols.pc_rpc import Server
from artiq.protocols.pc_rpc import AsyncioClient, Server from artiq.protocols.logging import LogForwarder, SourceFilter
from artiq.protocols.logging import (LogForwarder, LogParser, from artiq.tools import (simple_network_args, atexit_register_coroutine,
SourceFilter) bind_address_from_args)
from artiq.tools import * from artiq.devices.ctlmgr import ControllerManager
logger = logging.getLogger(__name__)
class Controller:
def __init__(self, name, ddb_entry):
self.name = name
self.command = ddb_entry["command"]
self.retry_timer = ddb_entry.get("retry_timer", 5)
self.retry_timer_backoff = ddb_entry.get("retry_timer_backoff", 1.1)
self.host = ddb_entry["host"]
self.port = ddb_entry["port"]
self.ping_timer = ddb_entry.get("ping_timer", 30)
self.ping_timeout = ddb_entry.get("ping_timeout", 30)
self.term_timeout = ddb_entry.get("term_timeout", 30)
self.retry_timer_cur = self.retry_timer
self.retry_now = Condition()
self.process = None
self.launch_task = asyncio.Task(self.launcher())
async def end(self):
self.launch_task.cancel()
await asyncio.wait_for(self.launch_task, None)
async def _call_controller(self, method):
remote = AsyncioClient()
await remote.connect_rpc(self.host, self.port, None)
try:
targets, _ = remote.get_rpc_id()
remote.select_rpc_target(targets[0])
r = await getattr(remote, method)()
finally:
remote.close_rpc()
return r
async def _ping(self):
try:
ok = await asyncio.wait_for(self._call_controller("ping"),
self.ping_timeout)
if ok:
self.retry_timer_cur = self.retry_timer
return ok
except:
return False
async def _wait_and_ping(self):
while True:
try:
await asyncio.wait_for(self.process.wait(),
self.ping_timer)
except asyncio.TimeoutError:
logger.debug("pinging controller %s", self.name)
ok = await self._ping()
if not ok:
logger.warning("Controller %s ping failed", self.name)
await self._terminate()
return
else:
break
def _get_log_source(self):
return "controller({})".format(self.name)
async def launcher(self):
try:
while True:
logger.info("Starting controller %s with command: %s",
self.name, self.command)
try:
self.process = await asyncio.create_subprocess_exec(
*shlex.split(self.command),
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
asyncio.ensure_future(
LogParser(self._get_log_source).stream_task(
self.process.stdout))
asyncio.ensure_future(
LogParser(self._get_log_source).stream_task(
self.process.stderr))
await self._wait_and_ping()
except FileNotFoundError:
logger.warning("Controller %s failed to start", self.name)
else:
logger.warning("Controller %s exited", self.name)
logger.warning("Restarting in %.1f seconds",
self.retry_timer_cur)
try:
await asyncio.wait_for(self.retry_now.wait(),
self.retry_timer_cur)
except asyncio.TimeoutError:
pass
self.retry_timer_cur *= self.retry_timer_backoff
except asyncio.CancelledError:
await self._terminate()
async def _terminate(self):
logger.info("Terminating controller %s", self.name)
if self.process is not None and self.process.returncode is None:
try:
await asyncio.wait_for(self._call_controller("terminate"),
self.term_timeout)
except:
logger.warning("Controller %s did not respond to terminate "
"command, killing", self.name)
try:
self.process.kill()
except ProcessLookupError:
pass
try:
await asyncio.wait_for(self.process.wait(),
self.term_timeout)
except:
logger.warning("Controller %s failed to exit, killing",
self.name)
try:
self.process.kill()
except ProcessLookupError:
pass
await self.process.wait()
logger.debug("Controller %s terminated", self.name)
def get_ip_addresses(host):
try:
addrinfo = socket.getaddrinfo(host, None)
except:
return set()
return {info[4][0] for info in addrinfo}
class Controllers:
def __init__(self):
self.host_filter = None
self.active_or_queued = set()
self.queue = asyncio.Queue()
self.active = dict()
self.process_task = asyncio.Task(self._process())
async def _process(self):
while True:
action, param = await self.queue.get()
if action == "set":
k, ddb_entry = param
if k in self.active:
await self.active[k].end()
self.active[k] = Controller(k, ddb_entry)
elif action == "del":
await self.active[param].end()
del self.active[param]
else:
raise ValueError
def __setitem__(self, k, v):
if (isinstance(v, dict) and v["type"] == "controller"
and self.host_filter in get_ip_addresses(v["host"])):
v["command"] = v["command"].format(name=k,
bind=self.host_filter,
port=v["port"])
self.queue.put_nowait(("set", (k, v)))
self.active_or_queued.add(k)
def __delitem__(self, k):
if k in self.active_or_queued:
self.queue.put_nowait(("del", k))
self.active_or_queued.remove(k)
def delete_all(self):
for name in set(self.active_or_queued):
del self[name]
async def shutdown(self):
self.process_task.cancel()
for c in self.active.values():
await c.end()
class ControllerDB:
def __init__(self):
self.current_controllers = Controllers()
def set_host_filter(self, host_filter):
self.current_controllers.host_filter = host_filter
def sync_struct_init(self, init):
if self.current_controllers is not None:
self.current_controllers.delete_all()
for k, v in init.items():
self.current_controllers[k] = v
return self.current_controllers
class ControllerManager(TaskObject):
def __init__(self, server, port, retry_master):
self.server = server
self.port = port
self.retry_master = retry_master
self.controller_db = ControllerDB()
async def _do(self):
try:
subscriber = Subscriber("devices",
self.controller_db.sync_struct_init)
while True:
try:
def set_host_filter():
s = subscriber.writer.get_extra_info("socket")
localhost = s.getsockname()[0]
self.controller_db.set_host_filter(localhost)
await subscriber.connect(self.server, self.port,
set_host_filter)
try:
await asyncio.wait_for(subscriber.receive_task, None)
finally:
await subscriber.close()
except (ConnectionAbortedError, ConnectionError,
ConnectionRefusedError, ConnectionResetError) as e:
logger.warning("Connection to master failed (%s: %s)",
e.__class__.__name__, str(e))
else:
logger.warning("Connection to master lost")
logger.warning("Retrying in %.1f seconds", self.retry_master)
await asyncio.sleep(self.retry_master)
except asyncio.CancelledError:
pass
finally:
await self.controller_db.current_controllers.shutdown()
def retry_now(self, k):
"""If a controller is disabled and pending retry, perform that retry
now."""
self.controller_db.current_controllers.active[k].retry_now.notify()
def get_argparser(): def get_argparser():
@ -280,7 +44,8 @@ def main():
root_logger = logging.getLogger() root_logger = logging.getLogger()
root_logger.setLevel(logging.NOTSET) root_logger.setLevel(logging.NOTSET)
source_adder = SourceFilter(logging.WARNING + args.quiet*10 - args.verbose*10, source_adder = SourceFilter(logging.WARNING +
args.quiet*10 - args.verbose*10,
"ctlmgr({})".format(platform.node())) "ctlmgr({})".format(platform.node()))
console_handler = logging.StreamHandler() console_handler = logging.StreamHandler()
console_handler.setFormatter(logging.Formatter( console_handler.setFormatter(logging.Formatter(