synctl warns when no process is stopped and avoids start (#6598)

* If an error occurs when stopping a process synctl now logs a warning.
* During a restart, synctl will avoid attempting to start Synapse if an error
  occurs during stopping Synapse.
This commit is contained in:
Romain Bouyé 2020-05-19 13:47:45 +01:00 committed by GitHub
parent ab3e19d814
commit a57863d2b4
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2 changed files with 29 additions and 3 deletions

1
changelog.d/6590.misc Normal file
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@ -0,0 +1 @@
`synctl` now warns if it was unable to stop Synapse and will not attempt to start Synapse if nothing was stopped. Contributed by Romain Bouyé.

31
synctl
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@ -142,12 +142,23 @@ def start_worker(app: str, configfile: str, worker_configfile: str) -> bool:
return False
def stop(pidfile, app):
def stop(pidfile: str, app: str) -> bool:
"""Attempts to kill a synapse worker from the pidfile.
Args:
pidfile: path to file containing worker's pid
app: name of the worker's appservice
Returns:
True if the process stopped successfully
False if process was already stopped or an error occured
"""
if os.path.exists(pidfile):
pid = int(open(pidfile).read())
try:
os.kill(pid, signal.SIGTERM)
write("stopped %s" % (app,), colour=GREEN)
return True
except OSError as err:
if err.errno == errno.ESRCH:
write("%s not running" % (app,), colour=YELLOW)
@ -155,6 +166,14 @@ def stop(pidfile, app):
abort("Cannot stop %s: Operation not permitted" % (app,))
else:
abort("Cannot stop %s: Unknown error" % (app,))
return False
else:
write(
"No running worker of %s found (from %s)\nThe process might be managed by another controller (e.g. systemd)"
% (app, pidfile),
colour=YELLOW,
)
return False
Worker = collections.namedtuple(
@ -300,11 +319,17 @@ def main():
action = options.action
if action == "stop" or action == "restart":
has_stopped = True
for worker in workers:
stop(worker.pidfile, worker.app)
if not stop(worker.pidfile, worker.app):
# A worker could not be stopped.
has_stopped = False
if start_stop_synapse:
stop(pidfile, "synapse.app.homeserver")
if not stop(pidfile, "synapse.app.homeserver"):
has_stopped = False
if not has_stopped:
sys.exit(1)
# Wait for synapse to actually shutdown before starting it again
if action == "restart":