Comment 0 for bug 1590799

Immediately after boot:

root@feynmann:~# systemctl status nfs-kernel-server
● nfs-server.service - NFS server and services
   Loaded: loaded (/lib/systemd/system/nfs-server.service; enabled; vendor preset: enabled)
   Active: inactive (dead)

Jun 09 14:35:47 feynmann systemd[1]: Dependency failed for NFS server and services.
Jun 09 14:35:47 feynmann systemd[1]: nfs-server.service: Job nfs-server.service/start failed

root@feynmann:~# systemctl status nfs-mountd.service
● nfs-mountd.service - NFS Mount Daemon
   Loaded: loaded (/lib/systemd/system/nfs-mountd.service; static; vendor preset: enabled)
   Active: failed (Result: exit-code) since Thu 2016-06-09 14:35:47 BST; 7min ago
  Process: 1321 ExecStart=/usr/sbin/rpc.mountd $RPCMOUNTDARGS (code=exited, status=1/FAILURE)

Jun 09 14:35:47 feynmann systemd[1]: Starting NFS Mount Daemon...
Jun 09 14:35:47 feynmann rpc.mountd[1321]: mountd: could not create listeners
Jun 09 14:35:47 feynmann systemd[1]: nfs-mountd.service: Control process exited, code=exited
Jun 09 14:35:47 feynmann systemd[1]: Failed to start NFS Mount Daemon.
Jun 09 14:35:47 feynmann systemd[1]: nfs-mountd.service: Unit entered failed state.
Jun 09 14:35:47 feynmann systemd[1]: nfs-mountd.service: Failed with result 'exit-code'.

root@feynmann:~# systemctl list-dependencies nfs-kernel-server
nfs-kernel-server.service
● ├─auth-rpcgss-module.service
● ├─nfs-config.service
● ├─nfs-idmapd.service
● ├─nfs-mountd.service
● ├─proc-fs-nfsd.mount
● ├─rpc-svcgssd.service
● ├─system.slice
● ├─network.target
● └─rpcbind.target
● └─rpcbind.service

root@feynmann:~# systemctl list-dependencies nfs-mountd.service
nfs-mountd.service
● ├─nfs-config.service
● ├─nfs-server.service
● ├─proc-fs-nfsd.mount
● └─system.slice
root@feynmann:~#

root@feynmann:~# lsb_release -rd
Description: Ubuntu 16.04 LTS
Release: 16.04

root@feynmann:~# apt-cache policy nfs-kernel-server
nfs-kernel-server:
  Installed: 1:1.2.8-9ubuntu12
  Candidate: 1:1.2.8-9ubuntu12
  Version table:
 *** 1:1.2.8-9ubuntu12 500
        500 http://gb.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

Additional comments:

    1. There seems to be a circular dependency between nfs-mountd and nfs-kernel-server
    2. I can get it working by changing the AFter,Requires in /lib/ssystemd/system/nfs-{mountd|server}.service files. I have managed to get nfs-kernel-server to start but not nfs-mountd.
    3. /usr/lib/systemd/scripts/nfs-utils_env.sh references /etc/sysconfig/nfs which is Centos/RedHat location of this file. Also /etc/default/nfs does not exist. (possibly unrelated to this bug)
    4. A file "/lib/systemd/system/-.slice" exists. this file prevents execution of 'ls *' or 'grep xxx *' commands in that directory. I am unsure whether this is intended by the systemd developers but it is unfriendly when investigating this bug.

Attempted solution:

    1. Edit /lib/systemd/system/nfs-server.service (original lines are commented out:

[Unit]
Description=NFS server and services
DefaultDependencies=no
Requires=network.target proc-fs-nfsd.mount rpcbind.target
# Requires=nfs-mountd.service
Wants=nfs-idmapd.service

After=local-fs.target
#After=network.target proc-fs-nfsd.mount rpcbind.target nfs-mountd.service
After=network.target proc-fs-nfsd.mount rpcbind.target
After=nfs-idmapd.service rpc-statd.service
#Before=rpc-statd-notify.service
Before=nfs-mountd.service rpc-statd-notify.service
...

followed by a systemctl daemon-reload and a reboot.

This results in nfs-kernel-server starting correctly but nfs-mountd not so. However starting nfs-mountd manually after reboot is successful:

root@feynmann:~# systemctl status nfs-kernel-server.service
● nfs-server.service - NFS server and services
   Loaded: loaded (/lib/systemd/system/nfs-server.service; enabled; vendor preset: enabled)
   Active: active (exited) since Thu 2016-06-09 15:07:23 BST; 1min 25s ago
  Process: 1391 ExecStart=/usr/sbin/rpc.nfsd $RPCNFSDARGS (code=exited, status=0/SUCCESS)
  Process: 1384 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=0/SUCCESS)
 Main PID: 1391 (code=exited, status=0/SUCCESS)
    Tasks: 0
   Memory: 0B
      CPU: 0
   CGroup: /system.slice/nfs-server.service

Jun 09 15:07:23 feynmann systemd[1]: Starting NFS server and services...
Jun 09 15:07:23 feynmann systemd[1]: Started NFS server and services.

root@feynmann:~# systemctl status nfs-mountd.service
● nfs-mountd.service - NFS Mount Daemon
   Loaded: loaded (/lib/systemd/system/nfs-mountd.service; static; vendor preset: enabled)
   Active: inactive (dead)

root@feynmann:~# systemctl start nfs-mountd.service

root@feynmann:~# systemctl status nfs-mountd.service
● nfs-mountd.service - NFS Mount Daemon
   Loaded: loaded (/lib/systemd/system/nfs-mountd.service; static; vendor preset: enabled)
   Active: active (running) since Thu 2016-06-09 15:09:02 BST; 3s ago
  Process: 2044 ExecStart=/usr/sbin/rpc.mountd $RPCMOUNTDARGS (code=exited, status=0/SUCCESS)
 Main PID: 2046 (rpc.mountd)
    Tasks: 1
   Memory: 904.0K
      CPU: 12ms
   CGroup: /system.slice/nfs-mountd.service
           └─2046 /usr/sbin/rpc.mountd --manage-gids

Jun 09 15:09:02 feynmann systemd[1]: Starting NFS Mount Daemon...
Jun 09 15:09:02 feynmann rpc.mountd[2046]: Version 1.2.8 starting
Jun 09 15:09:02 feynmann systemd[1]: Started NFS Mount Daemon.

Enabling nfs-mountd.service (systemctl enable nfs-mountd.service) has no effect in this case.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: nfs-kernel-server 1:1.2.8-9ubuntu12 [modified: lib/systemd/system/nfs-server.service]
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Thu Jun 9 14:38:58 2016
InstallationDate: Installed on 2016-06-08 (1 days ago)
InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3)
ProcEnviron:
 SHELL=/bin/bash
 TERM=linux
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 LANGUAGE=en_GB:en
SourcePackage: nfs-utils
UpgradeStatus: No upgrade log present (probably fresh install)