Munin contributed plugins

#!/usr/bin/env python

#

# Plugin to report service status

#

# Needs following minimal configuration in plugin-conf.d/nova:

#   [nova_*]

#   user nova

#

# Magic markers

#%# capabilities=autoconf

#%# family=auto

import sys

try:

    from nova import context

    from nova import db

    from nova import flags

    from nova import utils

except ImportError:

    succesful_import = False

else:

    succesful_import = True

services = ['nova-compute', 'nova-volume', 'nova-scheduler', 'nova-vncproxy', 'nova-network', 'nova-cert', 'nova-console', 'nova-consoleauth']

def print_config():

    global services

    print 'graph_title Nova Services'

    print 'graph_vlabel qty'

    print 'graph_args --base 1000 --lower-limit 0'

    print 'graph_category nova'

    print 'graph_scale no'

    print 'graph_info Nova services - alive and active'

    for service in services:

        print '%s_alive.label %s alive' % (service, service)

        print '%s_alive.draw LINE2' % service

        print '%s_alive.info seen in last 30 seconds' % service

        print '%s_active.label %s active' % (service, service)

        print '%s_active.draw LINE2' % service

        print '%s_active.info alive and enabled' % service

def get_status():

    global services

    alive = {}

    active = {}

    for k in services:

        alive[k] = 0

        active[k] = 0

    ctxt = context.get_admin_context()

    now = utils.utcnow()

    services = db.service_get_all(ctxt)

    for svc in services:

        delta = now - (svc['updated_at'] or svc['created_at'])

        if (delta.seconds <= 30):

            alive[svc['binary']] += 1

            if not svc['disabled']:

                active[svc['binary']] += 1

    return {'alive': alive, 'active': active}

def print_values():

    status = get_status()

    for (state, value) in status['alive'].iteritems():

        print "%s_alive.value %s" % (state, value)

    for (state, value) in status['active'].iteritems():

        print "%s_active.value %s" % (state, value)

if __name__ == '__main__':

    if len(sys.argv) > 1:

        if sys.argv[1] == "config":

            print_config()

        elif sys.argv[1] == "autoconf":

            if not succesful_import:  

                print 'no (failed import nova module]'

            else:

                print 'yes'

    elif succesful_import:

        utils.default_flagfile()

        flags.FLAGS(sys.argv)

        print_values()