def start_namenode()

in bigtop-packages/src/charm/hadoop/layer-hadoop-namenode/reactive/namenode.py [0:0]

• 15 lines of code
• 6 McCabe index (conditional complexity)

def start_namenode():
    hookenv.status_set('maintenance', 'starting namenode')
    # NB: service should be started by install, but we want to verify it is
    # running before we set the .started state and open ports. We always
    # restart here, which may seem heavy-handed. However, restart works
    # whether the service is currently started or stopped. It also ensures the
    # service is using the most current config.
    started = host.service_restart('hadoop-hdfs-namenode')
    if started:
        for port in get_layer_opts().exposed_ports('namenode'):
            hookenv.open_port(port)
        set_state('apache-bigtop-namenode.started')
        hookenv.status_set('maintenance', 'namenode started')
        hookenv.application_version_set(get_hadoop_version())
    else:
        hookenv.log('NameNode failed to start')
        hookenv.status_set('blocked', 'namenode failed to start')
        remove_state('apache-bigtop-namenode.started')
        for port in get_layer_opts().exposed_ports('namenode'):
            hookenv.close_port(port)