designate.py 文件源码

def create_initial_servers_and_domains(cls):
        """Create the nameserver entry and domains based on the charm user
        supplied config

        NOTE(AJK): This only wants to be done ONCE and by the leader, so we use
        leader settings to store that we've done it, after it's successfully
        completed.

        @returns None
        """
        KEY = 'create_initial_servers_and_domains'
        if hookenv.is_leader() and not hookenv.leader_get(KEY):
            nova_domain_name = hookenv.config('nova-domain')
            neutron_domain_name = hookenv.config('neutron-domain')
            with cls.check_zone_ids(nova_domain_name, neutron_domain_name):
                if hookenv.config('nameservers'):
                    for ns in hookenv.config('nameservers').split():
                        cls.create_server(ns)
                else:
                    hookenv.log('No nameserver specified, skipping creation of'
                                'nova and neutron domains',
                                level=hookenv.WARNING)
                    return
                if nova_domain_name:
                    cls.create_domain(
                        nova_domain_name,
                        hookenv.config('nova-domain-email'))
                if neutron_domain_name:
                    cls.create_domain(
                        neutron_domain_name,
                        hookenv.config('neutron-domain-email'))
            # if this fails, we weren't the leader any more; another unit may
            # attempt to do this too.
            hookenv.leader_set({KEY: 'done'})