NVP vProxy：NBD 虚拟机备份失败，并显示“VDDK Error：14009 - 服务器拒绝连接。

使用网络数据块设备 （NBD） 执行的虚拟机 （VM） 备份失败，并报告：

Failed to open source VMDK '[DATASTORE_NAME] #ABC#-#ABC#-#ABC#/VM_NAME.vmdk': VDDK Error: 14009 – The server refused connection.

vProxy 的 /opt/emc/vproxy/runtime/logs/vbackupd/vbackupd-vddk.log 报告：

YYYY-MM-DDTHH:mm:SS NOTICE: VDDK INFO Cnx_Connect: Error message: Failed to connect to server ESXi_ADDRESS:902
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK WARN [NFC ERROR]NfcNewAuthdConnectionEx: Failed to connect: Failed to connect to server ESXi_ADDRESS:902
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK WARN [NFC ERROR]NfcNewAuthdConnectionEx: Failed to connect to peer. Error: Failed to connect to server ESXi_ADDRESS:902
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK WARN [NFC ERROR]NfcEstablishAuthCnxToServer: Failed to create new AuthD connection: Failed to connect to server ESXi_ADDRESS:902
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK WARN [NFC ERROR]Nfc_BindAndEstablishAuthdCnx3: Failed to create a connection with server ESXi_ADDRESS: Failed to connect to server ESXi_ADDRESS:902
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK INFO NBD_ClientOpen: Couldn't connect to ESXi_ADDRESS:902 Failed to connect to server ESXi_ADDRESS:902
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK INFO DISKLIB-DSCPTR: DescriptorOpenNbd: Failed to open NBD extent 'vpxa-nfc://[DATASTORE_NAME] #ABC#-#ABC#-#ABC#/VM_NAME.vmdk@ESXi_ADDRESS:902': NBD_ERR_NETWORK_CONNECT
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK INFO DISKLIB-LINK  : DiskLinkOpen: Failed to open 'vpxa-nfc://[DATASTORE_NAME] #ABC#-#ABC#-#ABC#/VM_NAME.vmdk@ESXi_ADDRESS:902': : NBD_ERR_NETWORK_CONNECT
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK INFO DISKLIB-CHAIN : DiskChainOpen: "vpxa-nfc://[DATASTORE_NAME] #ABC#-#ABC#-#ABC#/VM_NAME.vmdk@ESXi_ADDRESS:902": failed to open: NBD_ERR_NETWORK_CONNECT.
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK INFO DISKLIB-LIB   : Failed to open 'vpxa-nfc://[DATASTORE_NAME] #ABC#-#ABC#-#ABC#/VM_NAME.vmdk@ESXi_ADDRESS:902' with flags 0xe NBD_ERR_NETWORK_CONNECT (2338).
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK INFO VixDiskLib: Detected DiskLib error 2338 (NBD_ERR_NETWORK_CONNECT).
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK INFO VixDiskLib: Failed to open disk vpxa-nfc://[DATASTORE_NAME] #ABC#-#ABC#-#ABC#/VM_NAME.vmdk@ESXi_ADDRESS:902!52a04cd0-8c56-ec6f-f705-ba0d58328830. Error 14009 (The server refused connection) (DiskLib error 2338: NBD_ERR_NETWORK_CONNECT) at 6396.
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK INFO VixDiskLib: VixDiskLib_OpenEx: Cannot open disk [DATASTORE_NAME] #ABC#-#ABC#-#ABC#/VM_NAME.vmdk. Error 14009 (The server refused connection) (DiskLib error 2338: NBD_ERR_NETWORK_CONNECT) at 7072.
YYYY-MM-DDTHH:mm:SS NOTICE: VDDK INFO VixDiskLib: VixDiskLib_Open: Cannot open disk [DATASTORE_NAME] #ABC#-#ABC#-#ABC#/VM_NAME.vmdk. Error 14009 (The server refused connection) at 7146.

同一 ESXi 主机上虚拟机的热添加备份可能会成功完成。
ESXi 主机上其他虚拟机的 NBD 备份（未观察到此连接问题）可能会成功完成。

vProxy 虚拟机无法连接到虚拟机所在的 ESXi 主机上的端口 902 和/或 443 。

curl -v ESXi_HOSTNAME:902
curl -v ESXi_HOSTNAME:443

示例：

nsr-vproxy01:~ # curl -v esx01.amer.lan:902
*   Trying 192.168.9.114:902...
* connect to 192.168.9.114 port 902 failed: Connection refused
* Failed to connect to esx01.amer.lan port 902 after 3 ms: Couldn't connect to server
* Closing connection 0
curl: (7) Failed to connect to esx01.amer.lan port 902 after 3 ms: Couldn't connect to server

nsr-vproxy01:~ # curl -v esx01.amer.lan:443
*   Trying 192.168.9.114:443...
* connect to 192.168.9.114 port 443 failed: Connection refused
* Failed to connect to esx01.amer.lan port 443 after 2 ms: Couldn't connect to server
* Closing connection 0
curl: (7) Failed to connect to esx01.amer.lan port 443 after 2 ms: Couldn't connect to server

或使用 ProxyHC 实用程序，用于检查从 vProxy 到 VMware 环境中每个 ESXi 主机的所有端口要求： 

/home/admin/ProxyHC port

此问题发生在 NetWorker 之外。请咨询网络和 VMware 管理员以解决网络连接问题。

以下文章中详细介绍了端口要求和网络故障排除步骤：NVP vProxy：对备份和还原作

的网络连接进行故障处理或者，如果此问题仅影响 NBD 备份，请检查虚拟机是否支持热添加传输模式。

• 虚拟机必须驻留在 vProxy 的 ESXi 主机可以直接访问的 VMware 数据存储区上。
• 虚拟机不得有任何 IDE 磁盘。
• 虚拟机必须使用硬件版本 7 或更高版本。
• NetWorker VMware 集成指南中记录了其他限制和注意事项：https://www.dell.com/support/product-details/product/networker/docs