NFS failed with result 'dependency'

NFS啓動報錯

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操作系統： rhel7.4

（1）查看報錯日誌

### systemctl restart nfs-server
### tail -200f /var/log/message
Dec 30 10:24:14 test systemd: Cannot add dependency job for unit iptables.service, ignoring: Unit is masked.
Dec 30 10:24:14 test systemd: Starting Preprocess NFS configuration...
Dec 30 10:24:14 test systemd: Mounting /nfs/test...
Dec 30 10:24:14 test kernel: XFS (zd208): Invalid superblock magic number
Dec 30 10:24:14 test mount: mount: wrong fs type, bad option, bad superblock on /dev/zd208,
Dec 30 10:24:14 test mount: missing codepage or helper program, or other error
Dec 30 10:24:14 test mount: In some cases useful info is found in syslog - try
Dec 30 10:24:14 test mount: dmesg | tail or so.
Dec 30 10:24:14 test systemd: Started Preprocess NFS configuration.
Dec 30 10:24:14 test systemd: nfs-test.mount mount process exited, code=exited status=32
Dec 30 10:24:14 test systemd: Failed to mount /nfs/test.
Dec 30 10:24:14 test systemd: Dependency failed for NFS server and services.
Dec 30 10:24:14 test systemd: Dependency failed for NFSv4 ID-name mapping service.
Dec 30 10:24:14 test systemd: Job nfs-idmapd.service/start failed with result 'dependency'.
Dec 30 10:24:14 test systemd: Dependency failed for NFS Mount Daemon.
Dec 30 10:24:14 test systemd: Job nfs-mountd.service/start failed with result 'dependency'.
Dec 30 10:24:14 test systemd: Job nfs-server.service/start failed with result 'dependency'.
Dec 30 10:24:14 test systemd: Unit nfs-test.mount entered failed state.
Dec 30 10:24:14 test systemd: Starting Notify NFS peers of a restart...
Dec 30 10:24:14 test sm-notify[361161]: Version 1.3.0 starting
Dec 30 10:24:14 test sm-notify[361161]: Already notifying clients; Exiting!
Dec 30 10:24:14 test systemd: Started Notify NFS peers of a restart.

（2）查看是否存在/dev/zd208掛載信息

發現文件中並無此掛載信息！！！

# df -h
# cat /etc/exports
# cat /etc/fstab

（3）解決方案

創建rpcbind.service的符號鏈接,其實就是做個rpcbind.service的軟連接用ln -s命令也行！！！

# systemctl add-wants multi-user.target rpcbind.service
Created symlink from /etc/systemd/system/multi-user.target.wants/rpcbind.service to /usr/lib/systemd/system/rpcbind. service.                                                                                 

# systemctl restart nfs-server