'perform oadm manage-node scheduable'

def _schedulable(self, node=None, selector=None, schedulable=True):

    cmd = ['manage-node']
    if node:
        cmd.extend(node)
    else:
        cmd.append('--selector={}'.format(selector))
    cmd.append('--schedulable={}'.format(schedulable))
    return self.openshift_cmd(cmd, oadm=True, output=True, output_type='raw')
