static void setHaConf(String nsId, Configuration conf) {
    conf.set(DFSConfigKeys.DFS_NAMESERVICES, nsId);
    final String haNNKey = DFS_HA_NAMENODES_KEY_PREFIX + "." + nsId;
    conf.set(haNNKey, "nn0,nn1");
    final String rpcKey = DFS_NAMENODE_RPC_ADDRESS_KEY + "." + nsId + ".";
    conf.set(rpcKey + "nn0", "127.0.0.1:8080");
    conf.set(rpcKey + "nn1", "127.0.0.1:8080");
  }
@Test
  public void testHaConf() {
    final Configuration conf = new Configuration();
    final String nsId = "cluster0";
    FsImageValidation.setHaConf(nsId, conf);
    Assert.assertTrue(HAUtil.isHAEnabled(conf, nsId));
  }