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#!/usr/bin/env python2
import zmq, msgpack, yaml, zmqtimer, binascii, nacl, sys, socket
from nacl.public import PublicKey, PrivateKey, Box
ctx = zmq.Context()
distributor = ctx.socket(zmq.PUB)
distributor.bind("ipc:///tmp/ccollectd-stats")
poller = zmq.Poller()
with open("config.yaml", "r") as cfile:
config = yaml.safe_load(cfile)
with open("privkey.dat", "r") as f:
privkey = PrivateKey(binascii.unhexlify(f.read()))
nodes = config["nodes"]
last_node_status = {}
socket_map = {}
boxes = {}
def heartbeat():
for hostname, node in nodes.iteritems():
retries = 0
while retries < config["heartbeat"]["attempts"]:
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.settimeout(float(config["heartbeat"]["timeout"]) / (retries + 1))
s.connect((node["ip"], node["port"]))
s.shutdown(socket.SHUT_RDWR)
s.close()
up = True
break
except socket.error, e:
up = False
retries += 1
try:
status_changed = (up != last_node_status[hostname])
initial = False
except KeyError, e:
status_changed = True
initial = True
last_node_status[hostname] = up
if status_changed:
if up:
msg_type = "up"
send_message = True
else:
msg_type = "down"
send_message = True
else:
if retries > 0:
msg_type = "blip"
send_message = True
if send_message:
distributor.send(msgpack.packb({
"host": config["hostname"],
"message": {
"service": "heartbeat",
"msg_type": msg_type,
"unit": hostname,
"initial": initial
}
}))
timers = zmqtimer.ZmqTimerManager()
timers.add_timer(zmqtimer.ZmqTimer(config["heartbeat"]["interval"], heartbeat))
for hostname, node in config["nodes"].iteritems():
boxes[hostname] = Box(privkey, PublicKey(binascii.unhexlify(node["pubkey"])))
grabber = ctx.socket(zmq.PULL)
grabber.connect(node["endpoint"])
socket_map[grabber] = hostname
poller.register(grabber, zmq.POLLIN)
while True:
timers.check()
socks = dict(poller.poll(timers.get_next_interval()))
for sock in socks:
if socks[sock] == zmq.POLLIN:
host = socket_map[sock]
try:
message = msgpack.unpackb(boxes[host].decrypt(sock.recv()))
except nacl.exceptions.CryptoError, e:
# Probably a spoofed message... skip to next socket
sys.stderr.write("Ignoring message... spoofed?\n") # FIXME: Use logging module...
continue
distributor.send(msgpack.packb({
"host": host,
"message": message
}))