Package: nfs-kernel-server
Version: 1:1.3.4-2.1+b1
Severity: normal

I have recently changed my NFS setup so that one of the intermediate paths for 
the
exported filesystem is a symlink. With this setup, trying to start the system 
with

    systemctl start nfs-server

fails, with `systemctl status nfs-server` reporting:

● nfs-server.service - NFS server and services                                  
                                                                                
                                     
   Loaded: loaded (/lib/systemd/system/nfs-server.service; enabled; vendor 
preset: enabled)
   Active: failed (Result: exit-code) since Sat 2018-02-10 19:06:15 CET; 14h ago
  Process: 27521 ExecStopPost=/usr/sbin/exportfs -f (code=exited, 
status=0/SUCCESS)
  Process: 27520 ExecStopPost=/usr/sbin/exportfs -au (code=exited, 
status=0/SUCCESS)
  Process: 27519 ExecStartPre=/usr/sbin/exportfs -r (code=exited, 
status=1/FAILURE)

Feb 10 19:06:15 labrador systemd[1]: Starting NFS server and services...
Feb 10 19:06:15 labrador exportfs[27519]: exportfs: Failed to stat 
/<path>/<symlink>/<target>: No such file or directory
Feb 10 19:06:15 labrador exportfs[27519]: exportfs: Failed to stat 
/<path>/<symlink>/<target>: No such file or directory
Feb 10 19:06:15 labrador systemd[1]: nfs-server.service: Control process 
exited, code=exited status=1
Feb 10 19:06:15 labrador systemd[1]: nfs-server.service: Failed with result 
'exit-code'.
Feb 10 19:06:15 labrador systemd[1]: Stopped NFS server and services.

journalctl -u nfs-server-.service -b has exactly those lines too.

Running all the appropriate daemons manually, including the sequence exportfs 
-f, exportfs -au, exportfs -r works correctly,
with the final export being /<path>/<actual directory pointed to by 
symlink>/<target> as expected.


-- Package-specific info:
-- rpcinfo --
   program vers proto   port  service
    100000    4   tcp    111  portmapper
    100000    3   tcp    111  portmapper
    100000    2   tcp    111  portmapper
    100000    4   udp    111  portmapper
    100000    3   udp    111  portmapper
    100000    2   udp    111  portmapper
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs
    100227    3   tcp   2049
    100003    3   udp   2049  nfs
    100227    3   udp   2049
    100021    1   udp  49410  nlockmgr
    100021    3   udp  49410  nlockmgr
    100021    4   udp  49410  nlockmgr
    100021    1   tcp  38281  nlockmgr
    100021    3   tcp  38281  nlockmgr
    100021    4   tcp  38281  nlockmgr
    100005    1   udp  44790  mountd
    100005    1   tcp  36505  mountd
    100005    2   udp  58345  mountd
    100005    2   tcp  40191  mountd
    100005    3   udp  50245  mountd
    100005    3   tcp  39943  mountd
-- /etc/default/nfs-kernel-server --
RPCNFSDCOUNT=8
RPCNFSDPRIORITY=0
RPCMOUNTDOPTS="--manage-gids"
NEED_SVCGSSD=""
RPCSVCGSSDOPTS=""
-- /etc/exports --
/<path>/<symlink>/<target> <someip>(rw,sync,no_root_squash,no_subtree_check) 
<someotherip>(rw,sync,no_root_squash,no_subtree_check) </16 
mask>(ro,sync,root_squash,no_subtree_check)
-- /proc/fs/nfs/exports --
# Version 1.1
# Path Client(Flags) # IPs

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.14.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages nfs-kernel-server depends on:
ii  init-system-helpers  1.51
ii  keyutils             1.5.9-9.2
ii  libblkid1            2.30.2-0.1
ii  libc6                2.26-2
ii  libcap2              1:2.25-1.2
ii  libsqlite3-0         3.21.0-1
ii  libtirpc1            0.2.5-1.2
ii  libwrap0             7.6.q-27
ii  lsb-base             9.20170808
ii  netbase              5.4
ii  nfs-common           1:1.3.4-2.1+b1
ii  ucf                  3.0036

nfs-kernel-server recommends no packages.

nfs-kernel-server suggests no packages.

-- no debconf information

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