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#!/usr/bin/env python3
import os
import sys
import hashlib
from supervisor import childutils
def hash(f):
s = hashlib.sha1()
with open(f, "rb") as fd:
for chunk in iter(lambda: fd.read(4096), b""):
s.update(chunk)
return s.hexdigest()
def last_hash(f):
with open(f, "r") as fd:
return fd.read().strip()
def write_hash(f, h):
with open(f, "w") as fd:
fd.write(h)
def main():
settings_file = "/etc/tower/settings.py"
hash_file = "/var/lib/awx/.configsha"
while 1:
rpc = childutils.getRPCInterface(os.environ)
headers, payload = childutils.listener.wait(sys.stdin, sys.stdout)
if not headers['eventname'].startswith('TICK'):
childutils.listener.ok(sys.stdout)
continue
try:
current_hash = hash(settings_file)
except:
sys.stderr.write("Could not open settings.py, skipping config watcher")
childutils.listener.ok(sys.stdout)
continue
try:
if current_hash == last_hash(hash_file):
childutils.listener.ok(sys.stdout)
continue
else:
sys.stderr.write("Config changed, reloading services")
for proc in rpc.supervisor.getAllProcessInfo():
group = proc['group']
name = proc['name']
program = "{}:{}".format(group, name)
if group == "tower-processes":
sys.stderr.write('Restarting %s\n' % program)
rpc.supervisor.stopProcess(program)
rpc.supervisor.startProcess(program)
except:
sys.stderr.write("No previous hash found")
write_hash(hash_file, current_hash)
childutils.listener.ok(sys.stdout)
if __name__ == '__main__':
main()
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