Synnefo

#!/usr/bin/env python

# -*- coding: utf-8 -*-

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"""Utility to monitor the progress of image deployment

A small utility that collects various monitoring messages from snf-image and

forwards them to the rest of the Synnefo infrastructure over AMQP.

"""

import os

import sys

import time

import json

from synnefo import settings

from synnefo.lib.amqp import AMQPClient

from synnefo.lib.utils import split_time

PROGNAME = os.path.basename(sys.argv[0])

def jsonstream(file):

    buf = ""

    decoder = json.JSONDecoder()

    while True:

        new_data = os.read(file.fileno(), 512)

        if not len(new_data):

            break

        buf += new_data.strip()

        while 1:

            try:

                msg, idx = decoder.raw_decode(buf)

            except ValueError:

                break

            yield msg

            buf = buf[idx:].strip()

def main():

    usage = "Usage: %s <instance_name>\n" % PROGNAME

    if len(sys.argv) != 2:

        sys.stderr.write(usage)

        return 1

    instance_name = sys.argv[1]

    # WARNING: This assumes that instance names

    # are of the form prefix-id, and uses prefix to

    # determine the routekey for AMPQ

    prefix = instance_name.split('-')[0]

    routekey = "ganeti.%s.event.progress" % prefix

    amqp_client = AMQPClient()

    amqp_client.connect(hosts=settings.AMQP_HOSTS, confirm_buffer=10)

    amqp_client.exchange_declare(settings.EXCHANGE_GANETI, "topic")

    for msg in jsonstream(sys.stdin):

        msg['event_time'] = split_time(time.time())

        msg['instance'] = instance_name

        # and send it over AMQP

        amqp_client.basic_publish(exchange=settings.EXCHANGE_GANETI,

                                  routing_key=routekey,

                                  body=json.dumps(msg))

    amqp_client.close()

    return 0

if __name__ == "__main__":

    sys.exit(main())

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