如果不能重启整改ESXi，通过vSphere下载想要设置嵌套虚拟化的云主机的config文件（xxx.vmx），在该文件最后加上vhv.enable = "TRUE" 命令。

报错如下：

  "org.zstack.vmware.APIAddVCenterMsg": {
    "domainName": "192.168.0.16",
    "name": "VC",
    "username": "administrator@vsphere.local",
    "password": "******",
    "https": "true",
    "zoneUuid": "631998da879f4b63b484876138c87a6a",
    "session": {
      "uuid": "5cec7c53f71344858a30186dd0d8280a",
      "callid": "api-mMa45Vw7"
   }
  }
}
{
  "success": false,
  "apiId": "476e659189ef4097b98dcf0ed4adc51c",
  "headers": {
    "api-id": "476e659189ef4097b98dcf0ed4adc51c",
    "schema": {}
  },
  "session": {
    "callid": "api-mMa45Vw7",
    "uuid": "5cec7c53f71344858a30186dd0d8280a"
  },
  "error": {
    "code": "SYS.1006",
    "description": "An operation failed",
    "details": "No dvSwitch found",
    "$$hashKey": "object:672"
  },
  "createdTime": 1496300098050,
  "type": {
    "_name": "key.event.API.API_EVENT"
  },
  "id": "872c5d4ab75e4fd88a69bec0f90b41fe"
}