NFS 共享不再在启动时挂载

Question

我有一个 NAS 设备并通过以下条目在其上挂载多个目录/etc/fstab：-

# NFS
number0:/projects /home/carl/number0/projects nfs rw 0 0
number0:/carl /home/carl/number0/stuff nfs rw 0 0
number0:/Qmultimedia /home/carl/Music nfs rw 0 0
number0:/Photos /home/carl/Pictures nfs rw 0 0

最近（可能是因为更新，虽然我不确定），NFS 共享没有在启动时安装，我必须使用sudo mount -a.

由于我从 Ubuntu 10.04（可能更早）开始使用相同的 fstab 条目，我怀疑 fstab 标准发生了一些变化，我不再遵守。

在 AU 上有很多关于 NFS 不是自动挂载的问题，但都与 Ubuntu 的旧版本有关，除了这个似乎不相关的问题。

编辑：输出sudo zegrep -w nfs /var/log/*是

/var/log/syslog.7.gz:Jul  8 19:35:16 number2 ureadahead[214]: ureadahead:/var/lib/nfs/.etab.lock: No such file or directory
/var/log/syslog.7.gz:Jul  8 19:35:16 number2 ureadahead[214]: ureadahead:/var/lib/nfs/.xtab.lock: No such file or directory
/var/log/syslog.7.gz:Jul  8 19:35:16 number2 kernel: [    4.974103] systemd[1]: Job nfs-blkmap.service/start failed with result 'dependency'.
/var/log/syslog.7.gz:Jul  8 19:35:20 number2 kernel: [   19.287387] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
/var/log/syslog.7.gz:Jul  8 19:35:26 number2 mount[767]: mount.nfs: Failed to resolve server number0: Temporary failure in name resolution
/var/log/syslog.7.gz:Jul  8 19:35:26 number2 mount[770]: mount.nfs: Failed to resolve server number0: Temporary failure in name resolution
/var/log/syslog.7.gz:Jul  8 19:35:26 number2 mount[773]: mount.nfs: Failed to resolve server number0: Temporary failure in name resolution
/var/log/syslog.7.gz:Jul  8 19:35:26 number2 mount[774]: mount.nfs: Failed to resolve server number0: Temporary failure in name resolution
/var/log/syslog.7.gz:Jul  8 19:35:26 number2 mount[775]: mount.nfs: Failed to resolve server number0: Temporary failure in name resolution
/var/log/syslog.7.gz:Jul  8 19:42:50 number2 kernel: [  470.817815] FS-Cache: Netfs 'nfs' registered for caching

NFS 服务器是 number0，它一直在运行（我有另一台机器也连接到相同的 NFS 共享）。

carl@number2:~$ ping number0
PING number0.home (192.168.1.65) 56(84) bytes of data.
64 bytes from number0.home (192.168.1.65): icmp_seq=1 ttl=64 time=0.364 ms

编辑 2：@waltinator 让我检查这些目录的存在和权限

carl@number2:~$ ls -l /var/lib | grep nfs
drwxr-xr-x 5 statd         nogroup       4096 Jul 21 17:55 nfs

carl@number2:~$ ls -l /var/lib/nfs | grep v4recovery
drwxr-xr-x 2 root  root    4096 Apr 27 23:05 v4recovery

编辑：共享实际上出现在 Nautilus 中，但已卸载。

Answer 1

您是否尝试过将服务器名称（number0）更改为IP（192.168.1.65）？

看来是在挂载时名称解析有问题。

例如更改为：

number0:/projects /home/carl/number0/projects nfs rw 0 0

到

192.168.1.65:/projects /home/carl/number0/projects nfs rw 0 0

Answer 2

责怪系统。这很可能出现在您最近的更新中。在尝试挂载之前，需要明确告知它等待网络内容准备就绪。

systemctl enable NetworkManager-wait-online.service

这里有很好的解释。