Synnefo

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import json

import string

from optparse import make_option

from snf_django.management.utils import pprint_table, parse_bool

from snf_django.management.commands import SynnefoCommand, CommandError

from synnefo.management.common import get_backend

from synnefo.admin import stats as statistics

class Command(SynnefoCommand):

    help = "Get available statistics of Cyclades service"

    can_import_settings = True

    option_list = SynnefoCommand.option_list + (

        make_option("--backend",

                    dest="backend",

                    help="Include statistics only for this backend."),

        make_option("--clusters",

                    dest="clusters",

                    default="True",

                    metavar="True|False",

                    choices=["True", "False"],

                    help="Include statistics about clusters."),

        make_option("--servers",

                    dest="servers",

                    default="True",

                    metavar="True|False",

                    choices=["True", "False"],

                    help="Include statistics about servers."),

        make_option("--resources",

                    dest="resources",

                    default="True",

                    metavar="True|False",

                    choices=["True", "False"],

                    help="Include statistics about resources "

                         " (CPU, RAM, DISK)."),

        make_option("--networks",

                    dest="networks",

                    default="True",

                    metavar="True|False",

                    choices=["True", "False"],

                    help="Include statistics about networks."),

        make_option("--images",

                    dest="images",

                    default="False",

                    metavar="True|False",

                    choices=["True", "False"],

                    help="Include statistics about images."),

    )

    def handle(self, *args, **options):

        if options["backend"] is not None:

            backend = get_backend(options["backend"])

        else:

            backend = None

        clusters = parse_bool(options["clusters"])

        servers = parse_bool(options["servers"])

        resources = parse_bool(options["resources"])

        networks = parse_bool(options["networks"])

        images = parse_bool(options["images"])

        stats = statistics.get_cyclades_stats(backend, clusters, servers,

                                              resources, networks, images)

        output_format = options["output_format"]

        if output_format == "json":

            self.stdout.write(json.dumps(stats, indent=4) + "\n")

        elif output_format == "pretty":

            pretty_print_stats(stats, self.stdout)

        else:

            raise CommandError("Output format '%s' not supported." %

                               output_format)

def columns_from_fields(fields, values):

    return zip(map(string.lower, fields), [values.get(f, 0) for f in fields])

def pretty_print_stats(stats, stdout):

    newline = lambda: stdout.write("\n")

    _datetime = stats.get("datetime")

    stdout.write("datetime: %s\n" % _datetime)

    newline()

    clusters = stats.get("clusters")

    if clusters is not None:

        fields = ["total", "drained", "offline"]

        table = columns_from_fields(fields, clusters)

        pprint_table(stdout, table, None,

                     title="Statistics for Ganeti Clusters")

        newline()

    servers = stats.get("servers")

    if servers is not None:

        fields = ["total", "STARTED", "STOPPED", "BUILD", "ERROR", "DESTROYED"]

        table = columns_from_fields(fields, servers)

        pprint_table(stdout, table, None,

                     title="Statistics for Virtual Servers")

        newline()

    networks = stats.get("networks")

    if networks is not None:

        public_ips = networks.pop("public_ips")

        networks["total_public_ips"] = public_ips.get("total", 0)

        networks["free_public_ips"] = public_ips.get("free", 0)

        fields = ["total", "ACTIVE", "DELETED", "ERROR"]

        table = columns_from_fields(fields, networks)

        pprint_table(stdout, table, None,

                     title="Statistics for Virtual Networks")

        newline()

    resources = stats.get("resources")

    if resources is not None:

        for resource_name, resource in sorted(resources.items()):

            fields = ["total", "allocated"]

            for res, num in sorted(resource.pop("servers", {}).items()):

                name = "servers_with_%s" % res

                resource[name] = num

                fields.append(name)

            table = columns_from_fields(fields, resources)

            pprint_table(stdout, table, None,

                         title="Statistics for %s" % resource_name)

            newline()

    images = stats.get("images")

    if images is not None:

        pprint_table(stdout, sorted(images.items()), None,

                     title="Statistics for Images")

        newline()