protected HashMap<String, Object> buildConfigParams(HostVO host) {
    HashMap<String, Object> params = new HashMap<String, Object>(host.getDetails().size() + 5);
    params.putAll(host.getDetails());

    params.put("guid", host.getGuid());
    params.put("zone", Long.toString(host.getDataCenterId()));
    if (host.getPodId() != null) {
      params.put("pod", Long.toString(host.getPodId()));
    }
    if (host.getClusterId() != null) {
      params.put("cluster", Long.toString(host.getClusterId()));
      String guid = null;
      ClusterVO cluster = _clusterDao.findById(host.getClusterId());
      if (cluster.getGuid() == null) {
        guid = host.getDetail("pool");
      } else {
        guid = cluster.getGuid();
      }
      if (guid != null && !guid.isEmpty()) {
        params.put("pool", guid);
      }
    }

    params.put("ipaddress", host.getPrivateIpAddress());
    params.put("secondary.storage.vm", "false");
    params.put(
        "max.template.iso.size", _configDao.getValue(Config.MaxTemplateAndIsoSize.toString()));
    params.put("migratewait", _configDao.getValue(Config.MigrateWait.toString()));
    return params;
  }
  @Override
  public HostVO createHostVOForConnectedAgent(HostVO host, StartupCommand[] cmd) {
    StartupCommand firstCmd = cmd[0];
    if (!(firstCmd instanceof StartupRoutingCommand)) {
      return null;
    }

    StartupRoutingCommand ssCmd = ((StartupRoutingCommand) firstCmd);
    if (ssCmd.getHypervisorType() != HypervisorType.KVM) {
      return null;
    }

    /* KVM requires host are the same in cluster */
    ClusterVO clusterVO = _clusterDao.findById(host.getClusterId());
    List<HostVO> hostsInCluster = _resourceMgr.listAllHostsInCluster(clusterVO.getId());
    if (!hostsInCluster.isEmpty()) {
      HostVO oneHost = hostsInCluster.get(0);
      _hostDao.loadDetails(oneHost);
      String hostOsInCluster = oneHost.getDetail("Host.OS");
      String hostOs = ssCmd.getHostDetails().get("Host.OS");
      if (!hostOsInCluster.equalsIgnoreCase(hostOs)) {
        throw new IllegalArgumentException(
            "Can't add host: "
                + firstCmd.getPrivateIpAddress()
                + " with hostOS: "
                + hostOs
                + " into a cluster,"
                + "in which there are "
                + hostOsInCluster
                + " hosts added");
      }
    }

    _hostDao.loadDetails(host);

    return _resourceMgr.fillRoutingHostVO(host, ssCmd, HypervisorType.KVM, host.getDetails(), null);
  }
  @Override
  public Map<? extends ServerResource, Map<String, String>> find(
      long dcId,
      Long podId,
      Long clusterId,
      URI uri,
      String username,
      String password,
      List<String> hostTags)
      throws DiscoveryException {

    ClusterVO cluster = _clusterDao.findById(clusterId);
    if (cluster == null || cluster.getHypervisorType() != HypervisorType.KVM) {
      if (s_logger.isInfoEnabled())
        s_logger.info("invalid cluster id or cluster is not for KVM hypervisors");
      return null;
    }

    Map<KvmDummyResourceBase, Map<String, String>> resources =
        new HashMap<KvmDummyResourceBase, Map<String, String>>();
    Map<String, String> details = new HashMap<String, String>();
    if (!uri.getScheme().equals("http")) {
      String msg =
          "urlString is not http so we're not taking care of the discovery for this: " + uri;
      s_logger.debug(msg);
      return null;
    }
    com.trilead.ssh2.Connection sshConnection = null;
    String agentIp = null;
    try {

      String hostname = uri.getHost();
      InetAddress ia = InetAddress.getByName(hostname);
      agentIp = ia.getHostAddress();
      String guid = UUID.nameUUIDFromBytes(agentIp.getBytes()).toString();
      String guidWithTail = guid + "-LibvirtComputingResource"; /*tail added by agent.java*/
      if (_resourceMgr.findHostByGuid(guidWithTail) != null) {
        s_logger.debug(
            "Skipping " + agentIp + " because " + guidWithTail + " is already in the database.");
        return null;
      }

      sshConnection = new com.trilead.ssh2.Connection(agentIp, 22);

      sshConnection.connect(null, 60000, 60000);
      if (!sshConnection.authenticateWithPassword(username, password)) {
        s_logger.debug("Failed to authenticate");
        throw new DiscoveredWithErrorException("Authentication error");
      }

      if (!SSHCmdHelper.sshExecuteCmd(sshConnection, "lsmod|grep kvm", 3)) {
        s_logger.debug("It's not a KVM enabled machine");
        return null;
      }

      List<PhysicalNetworkSetupInfo> netInfos =
          _networkMgr.getPhysicalNetworkInfo(dcId, HypervisorType.KVM);
      String kvmPrivateNic = _kvmPrivateNic;
      String kvmPublicNic = _kvmPublicNic;
      String kvmGuestNic = _kvmGuestNic;

      for (PhysicalNetworkSetupInfo info : netInfos) {
        if (info.getPrivateNetworkName() != null) {
          kvmPrivateNic = info.getPrivateNetworkName();
        }
        if (info.getPublicNetworkName() != null) {
          kvmPublicNic = info.getPublicNetworkName();
        }
        if (info.getGuestNetworkName() != null) {
          kvmGuestNic = info.getGuestNetworkName();
        }
      }

      String parameters =
          " -m " + _hostIp + " -z " + dcId + " -p " + podId + " -c " + clusterId + " -g " + guid
              + " -a";

      if (kvmPublicNic != null) {
        parameters += " --pubNic=" + kvmPublicNic;
      }

      if (kvmPrivateNic != null) {
        parameters += " --prvNic=" + kvmPrivateNic;
      }

      if (kvmGuestNic != null) {
        parameters += " --guestNic=" + kvmGuestNic;
      }

      SSHCmdHelper.sshExecuteCmd(sshConnection, "cloud-setup-agent " + parameters, 3);

      KvmDummyResourceBase kvmResource = new KvmDummyResourceBase();
      Map<String, Object> params = new HashMap<String, Object>();

      params.put("zone", Long.toString(dcId));
      params.put("pod", Long.toString(podId));
      params.put("cluster", Long.toString(clusterId));
      params.put("guid", guid);
      params.put("agentIp", agentIp);
      kvmResource.configure("kvm agent", params);
      resources.put(kvmResource, details);

      HostVO connectedHost = waitForHostConnect(dcId, podId, clusterId, guidWithTail);
      if (connectedHost == null) return null;

      details.put("guid", guidWithTail);

      // place a place holder guid derived from cluster ID
      if (cluster.getGuid() == null) {
        cluster.setGuid(UUID.nameUUIDFromBytes(String.valueOf(clusterId).getBytes()).toString());
        _clusterDao.update(clusterId, cluster);
      }

      // save user name and password
      _hostDao.loadDetails(connectedHost);
      Map<String, String> hostDetails = connectedHost.getDetails();
      hostDetails.put("password", password);
      hostDetails.put("username", username);
      _hostDao.saveDetails(connectedHost);
      return resources;
    } catch (DiscoveredWithErrorException e) {
      throw e;
    } catch (Exception e) {
      String msg = " can't setup agent, due to " + e.toString() + " - " + e.getMessage();
      s_logger.warn(msg);
    } finally {
      if (sshConnection != null) sshConnection.close();
    }

    return null;
  }