zulip/tools/restart-server

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#!/usr/bin/env python
import os
import sys
import subprocess
import pylibmc
import traceback
import logging
import time
from humbug_tools import ENDC, WARNING, OKGREEN
logging.basicConfig(format="%(asctime)s restart-server: %(message)s",
level=logging.INFO)
os.chdir("/home/humbug/humbug-deployments/current")
# Send a statsd event on restarting the server
subprocess.check_call(["python", "./manage.py", "send_stats", "incr", "events.server_restart", str(int(time.time()))])
# Restart the FastCGI and related processes via supervisorctl. We
# minimize downtime by restarting Django and Tornado separately from
# the other worker processes.
logging.info("Killing daemons")
subprocess.check_call(["supervisorctl", "stop", "humbug-workers:*"])
subprocess.check_call(["supervisorctl", "stop", "humbug-django"])
subprocess.check_call(["supervisorctl", "restart", "humbug-tornado"])
subprocess.check_call(["supervisorctl", "start", "humbug-django"])
subprocess.check_call(["supervisorctl", "start", "humbug-workers:*"])
logging.info("Flushing memcached")
try:
if not pylibmc.Client(['127.0.0.1']).flush_all():
print "%sflush_all returned False%s" % (WARNING, ENDC)
# There doesn't seem to be a method to close a pylibmc Client object.
except:
print "%sCould not flush cache:%s" % (WARNING, ENDC)
traceback.print_exc()
logging.info("Refilling memcached caches")
subprocess.check_call(["python", "./manage.py", "fill_memcached_caches"])
logging.info("Done!")
print OKGREEN + "Application restarted successfully!" + ENDC