~moon127/charms/trusty/ceilometer/add-execd-preinstall

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from charmhelpers.contrib.openstack import (
    templating,
    context,
)
from ceilometer_contexts import (
    LoggingConfigContext,
    MongoDBContext,
    CeilometerContext
)
from charmhelpers.contrib.openstack.utils import (
    get_os_codename_package,
    get_os_codename_install_source,
    configure_installation_source
)
from charmhelpers.core.hookenv import config, log
from charmhelpers.fetch import apt_update, apt_install

CEILOMETER_CONF = "/etc/ceilometer/ceilometer.conf"

CEILOMETER_SERVICES = [
    'ceilometer-agent-central',
    'ceilometer-collector',
    'ceilometer-api'
]

CEILOMETER_DB = "ceilometer"
CEILOMETER_SERVICE = "ceilometer"

CEILOMETER_PACKAGES = [
    'ceilometer-agent-central',
    'ceilometer-collector',
    'ceilometer-api'
]

CEILOMETER_ROLE = "ResellerAdmin"

#NOVA_CONF = "/etc/nova/nova.conf"
#NOVA_SETTINGS = [
#    ('DEFAULT', 'instance_usage_audit', 'True'),
#    ('DEFAULT', 'instance_usage_audit_period', 'hour'),
#    ('DEFAULT', 'notification_driver', 'ceilometer.compute.nova_notifier')
#]

CONFIG_FILES = {
    CEILOMETER_CONF: {
        'hook_contexts': [context.IdentityServiceContext(),
                          context.AMQPContext(),
                          LoggingConfigContext(),
                          MongoDBContext(),
                          CeilometerContext()],
        'services': CEILOMETER_SERVICES
    }
}

TEMPLATES = 'templates'


def register_configs():
    """
    Register config files with their respective contexts.
    Regstration of some configs may not be required depending on
    existing of certain relations.
    """
    # if called without anything installed (eg during install hook)
    # just default to earliest supported release. configs dont get touched
    # till post-install, anyway.
    release = get_os_codename_package('ceilometer-common', fatal=False) \
        or 'grizzly'
    configs = templating.OSConfigRenderer(templates_dir=TEMPLATES,
                                          openstack_release=release)

    for conf in CONFIG_FILES:
        configs.register(conf, CONFIG_FILES[conf]['hook_contexts'])

    return configs


def restart_map():
    '''
    Determine the correct resource map to be passed to
    charmhelpers.core.restart_on_change() based on the services configured.

    :returns: dict: A dictionary mapping config file to lists of services
                    that should be restarted when file changes.
    '''
    _map = {}
    for f, ctxt in CONFIG_FILES.iteritems():
        svcs = []
        for svc in ctxt['services']:
            svcs.append(svc)
        if svcs:
            _map[f] = svcs
    return _map


def get_ceilometer_context():
    ''' Retrieve a map of all current relation data for agent configuration '''
    ctxt = {}
    for context in CONFIG_FILES[CEILOMETER_CONF]['hook_contexts']:
        ctxt.update(context())
    return ctxt


def do_openstack_upgrade(configs):
    """
    Perform an upgrade.  Takes care of upgrading packages, rewriting
    configs, database migrations and potentially any other post-upgrade
    actions.

    :param configs: The charms main OSConfigRenderer object.
    """
    new_src = config('openstack-origin')
    new_os_rel = get_os_codename_install_source(new_src)

    log('Performing OpenStack upgrade to %s.' % (new_os_rel))

    configure_installation_source(new_src)
    dpkg_opts = [
        '--option', 'Dpkg::Options::=--force-confnew',
        '--option', 'Dpkg::Options::=--force-confdef',
    ]
    apt_update(fatal=True)
    apt_install(packages=CEILOMETER_PACKAGES,
                options=dpkg_opts,
                fatal=True)

    # set CONFIGS to load templates from new release
    configs.set_release(openstack_release=new_os_rel)