#!/usr/bin/python2.6

# Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.

#

#    Licensed under the Apache License, Version 2.0 (the "License"); you may

#    not use this file except in compliance with the License. You may obtain

#    a copy of the License at

#

#         http://www.apache.org/licenses/LICENSE-2.0

#

#    Unless required by applicable law or agreed to in writing, software

#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

#    License for the specific language governing permissions and limitations

#    under the License.

import ConfigParser

import os

import sys

import smf_include

from subprocess import CalledProcessError, check_call, PIPE, Popen

from sqlalchemy import create_engine

def db_sync():

    """ function to create the database schema

    """

    cmd = ["/usr/bin/nova-manage", "db", "sync"]

    try:

        check_call(cmd)

    except CalledProcessError as err:

        print "Unable to create database for Nova:  %s" % err

        sys.exit(smf_include.SMF_EXIT_ERR_CONFIG)

def start():

    # read the options from the config file

    parser = ConfigParser.ConfigParser()

    parser.read("/etc/nova/nova.conf")

    # get the database type

    db_engine = create_engine(parser.get("DEFAULT", "sql_connection"))

    db_type = db_engine.name

    if db_type == "sqlite":

        # look to see if file exists or if it's zero length

        abspath = os.path.abspath(db_engine.url.database)

        if not os.path.exists(abspath) or os.path.getsize(abspath) == 0:

            db_sync()

    elif db_type == "mysql":

        mysql_svc = "svc:/application/database/mysql:version_55"

        cmd = ["/usr/bin/svcs", "-H", "-o", "state", mysql_svc]

        try:

            p = Popen(cmd, stdout=PIPE, stderr=PIPE)

            output, error = p.communicate()

        except CalledProcessError:

            print "mysql service not found.  Is it installed?"

            return smf_include.SMF_EXIT_ERR_CONFIG

        if output.strip() != "online":

            # attempt to start mysql

            cmd = ["/usr/sbin/svcadm", "enable", "-rs", mysql_svc]

            try:

                check_call(cmd)

            except CalledProcessError as err:

                print "starting mysql service failed:  %s" % err

                return smf_include.SMF_EXIT_ERR_CONFIG

        # not sure how to check if the database is valid, so just create

        # the database every time for now

        db_sync()

    smf_include.smf_subprocess("/usr/lib/nova/nova-conductor")

if __name__ == "__main__":

    os.putenv("LC_ALL", "C")

    smf_include.smf_main()