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Merge pull request #151 from pikers/supervise 

Supervise da daemons.
readme_bumpz
goodboy 2021-04-03 12:34:11 -04:00 committed by GitHub
parent 4a590edcc3 549f81e85d
commit 890f80ed34
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10 changed files with 271 additions and 59 deletions
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226
piker/_daemon.py 100644
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@ -0,0 +1,226 @@
# piker: trading gear for hackers
# Copyright (C) Tyler Goodlet (in stewardship for piker0)
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
"""
Structured, daemon tree service management.
"""
from typing import Optional, Union
from contextlib import asynccontextmanager
from pydantic import BaseModel
import trio
import tractor
from .log import get_logger, get_console_log
from .brokers import get_brokermod
log = get_logger(__name__)
_root_dname = 'pikerd'
_root_modules = [
__name__,
'piker.clearing._ems',
'piker.clearing._client',
]
class Services(BaseModel):
actor_n: tractor._trionics.ActorNursery
service_n: trio.Nursery
class Config:
arbitrary_types_allowed = True
_services: Optional[Services] = None
@asynccontextmanager
async def open_pikerd(
loglevel: Optional[str] = None,
**kwargs,
) -> Optional[tractor._portal.Portal]:
"""Start a root piker daemon who's lifetime extends indefinitely
until cancelled.
A root actor nursery is created which can be used to create and keep
alive underling services (see below).
"""
global _services
assert _services is None
# XXX: this may open a root actor as well
async with tractor.open_root_actor(
# passed through to ``open_root_actor``
name=_root_dname,
loglevel=loglevel,
# TODO: eventually we should be able to avoid
# having the root have more then permissions to
# spawn other specialized daemons I think?
# enable_modules=[__name__],
enable_modules=_root_modules,
) as _, tractor.open_nursery() as actor_nursery:
async with trio.open_nursery() as service_nursery:
# assign globally for future daemon/task creation
_services = Services(
actor_n=actor_nursery,
service_n=service_nursery
)
yield _services
@asynccontextmanager
async def maybe_open_pikerd(
loglevel: Optional[str] = None,
**kwargs,
) -> Union[tractor._portal.Portal, Services]:
"""If no ``pikerd`` daemon-root-actor can be found start it and
yield up (we should probably figure out returning a portal to self
though).
"""
if loglevel:
get_console_log(loglevel)
try:
async with tractor.find_actor(_root_dname) as portal:
assert portal is not None
yield portal
return
except (RuntimeError, AssertionError): # tractor runtime not started yet
# presume pikerd role
async with open_pikerd(
loglevel,
**kwargs,
) as _:
# in the case where we're starting up the
# tractor-piker runtime stack in **this** process
# we return no portal to self.
yield None
# brokerd enabled modules
_data_mods = [
'piker.brokers.core',
'piker.brokers.data',
'piker.data',
'piker.data._buffer'
]
async def spawn_brokerd(
brokername,
loglevel: Optional[str] = None,
**tractor_kwargs
) -> tractor._portal.Portal:
log.info(f'Spawning {brokername} broker daemon')
brokermod = get_brokermod(brokername)
dname = f'brokerd.{brokername}'
extra_tractor_kwargs = getattr(brokermod, '_spawn_kwargs', {})
tractor_kwargs.update(extra_tractor_kwargs)
global _services
assert _services
await _services.actor_n.start_actor(
dname,
enable_modules=_data_mods + [brokermod.__name__],
loglevel=loglevel,
**tractor_kwargs
)
return dname
@asynccontextmanager
async def maybe_spawn_brokerd(
brokername: str,
loglevel: Optional[str] = None,
# XXX: you should pretty much never want debug mode
# for data daemons when running in production.
debug_mode: bool = True,
) -> tractor._portal.Portal:
"""If no ``brokerd.{brokername}`` daemon-actor can be found,
spawn one in a local subactor and return a portal to it.
"""
if loglevel:
get_console_log(loglevel)
dname = f'brokerd.{brokername}'
# attach to existing brokerd if possible
async with tractor.find_actor(dname) as portal:
if portal is not None:
yield portal
return
# ask root ``pikerd`` daemon to spawn the daemon we need if
# pikerd is not live we now become the root of the
# process tree
async with maybe_open_pikerd(
loglevel=loglevel
) as pikerd_portal:
if pikerd_portal is None:
# we are root so spawn brokerd directly in our tree
# the root nursery is accessed through process global state
await spawn_brokerd(brokername, loglevel=loglevel)
else:
await pikerd_portal.run(
spawn_brokerd,
brokername=brokername,
loglevel=loglevel,
debug_mode=debug_mode,
)
async with tractor.wait_for_actor(dname) as portal:
yield portal
async def spawn_emsd(
brokername,
loglevel: Optional[str] = None,
**extra_tractor_kwargs
) -> tractor._portal.Portal:
log.info('Spawning emsd')
# TODO: raise exception when _services == None?
global _services
await _services.actor_n.start_actor(
'emsd',
enable_modules=[
'piker.clearing._ems',
'piker.clearing._client',
],
loglevel=loglevel,
**extra_tractor_kwargs
)
return 'emsd'

0
piker/exchange/__init__.py → piker/clearing/__init__.py
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28
piker/exchange/_client.py → piker/clearing/_client.py
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@ -168,27 +168,27 @@ async def send_order_cmds():
@asynccontextmanager
async def maybe_open_emsd(
) -> 'StreamReceiveChannel': # noqa
brokername: str,
) -> tractor._portal.Portal: # noqa
async with tractor.find_actor('emsd') as portal:
if portal is not None:
yield portal
return
else:
# we gotta spawn it
log.info("Spawning EMS daemon")
# ask remote daemon tree to spawn it
from .._daemon import spawn_emsd
# TODO: add ``maybe_spawn_emsd()`` for this
async with tractor.open_nursery() as n:
async with tractor.find_actor('pikerd') as portal:
assert portal
name = await portal.run(
spawn_emsd,
brokername=brokername,
)
portal = await n.start_actor(
'emsd',
enable_modules=[
'piker.exchange._ems',
],
)
async with tractor.wait_for_actor(name) as portal:
yield portal
yield portal
@asynccontextmanager
@ -235,7 +235,7 @@ async def open_ems(
# ready for order commands
book = get_orders()
async with maybe_open_emsd() as portal:
async with maybe_open_emsd(broker) as portal:
trades_stream = await portal.run(
_emsd_main,

0
piker/exchange/_ems.py → piker/clearing/_ems.py
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0
piker/exchange/_paper_engine.py → piker/clearing/_paper_engine.py
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14
piker/cli/__init__.py
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@ -4,6 +4,7 @@ CLI commons.
import os
import click
import trio
import tractor
from ..log import get_console_log, get_logger, colorize_json
@ -35,13 +36,14 @@ _context_defaults = dict(
def pikerd(loglevel, host, tl):
"""Spawn the piker broker-daemon.
"""
from ..data import _data_mods
from .._daemon import _data_mods, open_pikerd
get_console_log(loglevel)
tractor.run_daemon(
rpc_module_paths=_data_mods,
name='brokerd',
loglevel=loglevel if tl else None,
)
async def main():
async with open_pikerd(loglevel):
await trio.sleep_forever()
trio.run(main)
@click.group(context_settings=_context_defaults)

51
piker/data/__init__.py
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@ -29,11 +29,11 @@ from typing import (
Dict, Any, Sequence, AsyncIterator, Optional
)
import trio
import tractor
from ..brokers import get_brokermod
from ..log import get_logger, get_console_log
from .._daemon import spawn_brokerd, maybe_open_pikerd
from ._normalize import iterticks
from ._sharedmem import (
maybe_open_shm_array,
@ -48,7 +48,6 @@ from ._buffer import (
subscribe_ohlc_for_increment
)
__all__ = [
'iterticks',
'maybe_open_shm_array',
@ -75,15 +74,6 @@ def get_ingestormod(name: str) -> ModuleType:
return module
# capable rpc modules
_data_mods = [
'piker.brokers.core',
'piker.brokers.data',
'piker.data',
'piker.data._buffer',
]
@asynccontextmanager
async def maybe_spawn_brokerd(
brokername: str,
@ -95,11 +85,11 @@ async def maybe_spawn_brokerd(
) -> tractor._portal.Portal:
"""If no ``brokerd.{brokername}`` daemon-actor can be found,
spawn one in a local subactor and return a portal to it.
"""
if loglevel:
get_console_log(loglevel)
brokermod = get_brokermod(brokername)
dname = f'brokerd.{brokername}'
async with tractor.find_actor(dname) as portal:
@ -107,32 +97,29 @@ async def maybe_spawn_brokerd(
if portal is not None:
yield portal
else: # no daemon has been spawned yet
else:
# ask root ``pikerd`` daemon to spawn the daemon we need if
# pikerd is not live we now become the root of the
# process tree
async with maybe_open_pikerd(
loglevel=loglevel
) as pikerd_portal:
log.info(f"Spawning {brokername} broker daemon")
if pikerd_portal is None:
# we are root so spawn brokerd directly in our tree
# the root nursery is accessed through process global state
await spawn_brokerd(brokername, loglevel=loglevel)
# retrieve any special config from the broker mod
tractor_kwargs = getattr(brokermod, '_spawn_kwargs', {})
async with tractor.open_nursery(
#debug_mode=debug_mode,
) as nursery:
try:
# spawn new daemon
portal = await nursery.start_actor(
dname,
enable_modules=_data_mods + [brokermod.__name__],
else:
await pikerd_portal.run(
spawn_brokerd,
brokername=brokername,
loglevel=loglevel,
debug_mode=debug_mode,
**tractor_kwargs
)
async with tractor.wait_for_actor(dname) as portal:
yield portal
finally:
# client code may block indefinitely so cancel when
# teardown is invoked
await nursery.cancel()
async with tractor.wait_for_actor(dname) as portal:
yield portal
@dataclass

7
piker/ui/_exec.py
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@ -41,6 +41,7 @@ import trio
import tractor
from outcome import Error
from .._daemon import maybe_open_pikerd
from ..log import get_logger
from ._pg_overrides import _do_overrides
@ -194,11 +195,7 @@ def run_qtractor(
# define tractor entrypoint
async def main():
async with tractor.open_root_actor(
arbiter_addr=(
tractor._root._default_arbiter_host,
tractor._root._default_arbiter_port,
),
async with maybe_open_pikerd(
name='qtractor',
**tractor_kwargs,
):

2
piker/ui/cli.py
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@ -149,7 +149,7 @@ def chart(config, symbol, profile):
'debug_mode': True,
'loglevel': tractorloglevel,
'enable_modules': [
'piker.exchange._client'
'piker.clearing._client'
],
},
)

2
piker/ui/order_mode.py
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@ -31,7 +31,7 @@ from pydantic import BaseModel
from ._graphics._lines import LevelLine, position_line
from ._interaction import LineEditor, ArrowEditor, _order_lines
from ..exchange._client import open_ems, OrderBook
from ..clearing._client import open_ems, OrderBook
from ..data._source import Symbol
from ..log import get_logger