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ctlmgr: exponential backoff

This commit is contained in:
Sebastien Bourdeauducq 2015-08-09 18:28:56 +08:00
parent 3f68d0ba8f
commit a21049d779
1 changed files with 10 additions and 4 deletions
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14
artiq/frontend/artiq_ctlmgr.py
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@ -40,12 +40,14 @@ class Controller:
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.retry_timer_cur = self.retry_timer
self.process = None
self.launch_task = asyncio.Task(self.launcher())
@ -69,8 +71,11 @@ class Controller:
@asyncio.coroutine
def _ping(self):
try:
return (yield from asyncio.wait_for(
self._ping_notimeout(), self.ping_timeout))
ok = yield from asyncio.wait_for(self._ping_notimeout(),
self.ping_timeout)
if ok:
self.retry_timer_cur = self.retry_timer
return ok
except:
return False
@ -102,8 +107,9 @@ class Controller:
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)
yield from asyncio.sleep(self.retry_timer)
logger.warning("Restarting in %.1f seconds", self.retry_timer_cur)
yield from asyncio.sleep(self.retry_timer_cur)
self.retry_timer_cur *= self.retry_timer_backoff
except asyncio.CancelledError:
yield from self._terminate()