How To Set Up an NFS Mount on Ubuntu 16.04

Posted Aug 4, 2016 9.7k views Networking Ubuntu Ubuntu 16.04

Question for:
https://www.digitalocean.com/community/questions

What does nfs-server.service code=exited status=22 mean? [using M. Anderson's tutorial]

Log: SetUp NFS Mount Ubuntu 16.04

This tutorial has gotten me further in getting one Ubuntu 16.04 to file share than the other 5 or so, good writing!
Have searched and found no mention of status=22 here or at Ask.Ubuntu. [file folders /status/22/ for another program. ] other nfs-server.service questions do not seem to apply to this situation.

This is a home office LAN with 1 Ubuntu HP 220-110z tower and 1 Ubuntu HP Laptop and one Win 10 Laptop. [connecting with Win 10 is another matter.]

Remote superuser not wanted.

I have been following M. Anderson's tutorial at:
https://www.digitalocean.com/community/tutorials/how-to-set-up-an-nfs-mount-on-ubuntu-16-04

I did not know what was needed so I included I hope not too much.
I successfully completed up to Step 3 — Configuring the NFS Exports on the Host Server

Brief list of commands completed:

Host:~$ sudo apt-get update
Host:~$ sudo apt-get install nfs-kernel-server
Client:~$ sudo apt-get update
Client:~$ sudo apt-get install nfs-common
Host:~$ sudo mkdir /var/nfs/general -p
Host:~$ sudo chown nobody:nogroup /var/nfs/general

Host:~$ ls -la /var/nfs/general
total 8
drwxr-xr-x 2 nobody nogroup 4096 Sep 23 21:44 .
drwxr-xr-x 3 root   root    4096 Sep 23 21:44 ..
# for Win10 Laptop 

Host:~$ ls -la /home
total 12
drwxr-xr-x  4 root        root        4096 Jul 20 19:48 .
drwxr-xr-x 24 root        root        4096 Sep 24 04:31 ..
drwxr-xr-x 34 luigiwriter luigiwriter 4096 Sep 25 01:38 luigiwriter 
# for Ubuntu 16.04 Tower

Host:~$ sudo sudo nano /etc/exports
/var/nfs/general   192.168.200.255(rw, sync, no_subtree_check)
/home              192.168.200.208(rw, sync, no_subtree_check)
^O
^X

Host:~$ sudo ufw status
Status: active
To                         Action      From
--                         ------      ----
2049                       ALLOW       192.168.200.255           

The Failure Error message occured here.

# ================================================================
Host:~$ sudo systemctl restart nfs-kernel-server
Job for nfs-server.service failed because the control process exited with error code. See "systemctl status nfs-server.service" and "journalctl -xe" for details.

DETAILS

# ================================================================
Host:~$ sudo systemctl status nfs-server.service
# ----------------------------------------------------------------
* nfs-server.service - NFS server and services
   Loaded: loaded (/lib/systemd/system/nfs-server.service; enabled; vendor pre
   Active: FAILED (Result: exit-code) since Sun 2016-09-25 01:33:13 EDT; 57s a <<---*
  Process: 5531 ExecStopPost=/usr/sbin/exportfs -f (code=exited, status=0/SUCC
  Process: 5525 ExecStopPost=/usr/sbin/exportfs -au (code=exited, status=0/SUC
  Process: 5522 ExecStop=/usr/sbin/rpc.nfsd 0 (code=exited, status=0/SUCCESS)
  Process: 1181 ExecStart=/usr/sbin/rpc.nfsd $RPCNFSDARGS (code=exited, status <<---*status=0
  Process: 5825 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=22)    <<---*status=22
 Main PID: 1181 (code=exited, status=0/SUCCESS)

Sep 25 01:33:13 Hostsystemd[1]: Starting NFS se
Sep 25 01:33:13 Hostexportfs[5825]: exportfs: /
Sep 25 01:33:13 Hostsystemd[1]: nfs-server.serv
Sep 25 01:33:13 Hostsystemd[1]: FAILED TO START                                  <<---*
Sep 25 01:33:13 Hostsystemd[1]: nfs-server.serv
Sep 25 01:33:13 Hostsystemd[1]: nfs-server.serv
# EOF ----------

# ================================================================
Host:~$ sudo journalctl -xe 
# ----------------------------------------------------------------
# Sep 25 01:32:13 is when the failure started.
Sep 25 01:32:13 Hostsudo[5796]: pam_unix(sudo:session): sessi
Sep 25 01:33:13 Hostsudo[5816]: [Host:] TTY=pts/17 ; PW
Sep 25 01:33:13 Hostsudo[5816]: pam_unix(sudo:session): sessi
Sep 25 01:33:13 Hostsystemd[1]: Stopped NFS server and servic
-- Unit nfs-server.service has finished shutting down.                                       <<---*

# In the following, Most repetative lines have been deleted, 
# For example when the -- Subject: and following line are the same message.
# Also deleted the following two lines from each entry:
#    -- Defined-By: systemd
#    -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel

Sep 25 01:33:13 Hostsystemd[1]: Starting NFS Mount Daemon...
-- Unit nfs-mountd.service has begun starting up.
Sep 25 01:33:13 Hostsystemd[1]: Starting NFSv4 ID-name mappin
-- Unit nfs-idmapd.service has begun starting up.
Sep 25 01:33:13 Hostsystemd[1]: Started NFSv4 ID-name mapping
-- Unit nfs-idmapd.service has finished starting up.
-- The start-up result is done.

Sep 25 01:33:13 Hostrpc.mountd[5824]: Version 1.2.8 starting
Sep 25 01:33:13 Hostsystemd[1]: Started NFS Mount Daemon.
-- Unit nfs-mountd.service has finished starting up.
-- The start-up result is done.

Sep 25 01:33:13 Hostsystemd[1]: Starting NFS server and servi

# NO FAILURE MESSAGES BEFORE THIS POINT in Journalctl.
-- 
-- Unit nfs-server.service has begun starting up.
Sep 25 01:33:13 Hostexportfs[5825]: exportfs: /etc/exports:1:
Sep 25 01:33:13 Hostsystemd[1]: nfs-server.service: Control p
Sep 25 01:33:13 Hostsystemd[1]: FAILED TO START NFS SERVER AN <<---*

-- UNIT NFS-SERVER.SERVICE HAS FAILED.                <<---*status=22
-- The result is failed.

Sep 25 01:33:13 Hostsystemd[1]: nfs-server.service: Unit ente
Sep 25 01:33:13 Hostsystemd[1]: nfs-server.service: Failed wi <<---*
Sep 25 01:33:13 Hostrpc.mountd[5824]: Caught signal 15, un-re <<---*
Sep 25 01:33:13 Hostsystemd[1]: Stopping NFS Mount Daemon...  <<---*
-- Subject: Unit nfs-mountd.service has begun shutting down
-- 
-- Unit nfs-mountd.service has begun shutting down.
Sep 25 01:33:13 Hostsystemd[1]: Stopping NFSv4 ID-name mappin
-- 
-- Unit nfs-idmapd.service has begun shutting down.
Sep 25 01:33:13 Hostsudo[5816]: pam_unix(sudo:session): sessi
Sep 25 01:33:13 Hostsystemd[1]: Stopped NFS Mount Daemon.
-- Unit nfs-mountd.service has finished shutting down.
-- 
Sep 25 01:33:13 Hostsystemd[1]: Stopped NFSv4 ID-name mapping
-- Unit nfs-idmapd.service has finished shutting down.

This Section repeats 4 times with identical results -----------------------

Sep 25 01:34:03 Hostkernel: [UFW BLOCK] IN=enp2s0 OUT= MAC=01:00:5e:00:00:01:a
Sep 25 01:36:08 Hostkernel: [UFW BLOCK] IN=enp2s0 OUT= MAC=01:00:5e:00:00:01:a
Sep 25 01:36:54 Hostsystemd[1]: Starting Automatically refresh installed snaps
-- 
-- Unit snapd.refresh.service has begun starting up.
Sep 25 01:36:55 Host/usr/lib/snapd/snapd[1019]: store.go:539: DEBUG: cannot se
Sep 25 01:36:55 Host/usr/lib/snapd/snapd[1019]: daemon.go:170: DEBUG: uid=0;@ 
Sep 25 01:36:55 Hostsnap[5858]: [4B blob data]
Sep 25 01:36:55 Hostsnap[5858]: All snaps up to date.
Sep 25 01:36:55 Hostsystemd[1]: Started Automatically refresh installed snaps.
-- Unit snapd.refresh.service has finished starting up.
-- 
-- The start-up result is done.

Sep 25 01:36:55 Hostsystemd[1]: snapd.refresh.timer: Adding 3h 59.727602s rand
Sep 25 01:36:55 Hostsystemd[1]: snapd.refresh.timer: Adding 58.845634s random 
Sep 25 01:38:13 Hostkernel: [UFW BLOCK] IN=enp2s0 OUT= MAC=01:00:5e:00:00:01:a
lines 2256-2284/2284 (END)
Sep 25 01:33:13 Hostsystemd[1]: Stopped NFSv4 ID-name mapping service.
-- Subject: Unit nfs-idmapd.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- Unit nfs-idmapd.service has finished shutting down.

# End of repeating section ----------------------------------------------------

Sep 25 01:36:55 Hostsystemd[1]: snapd.refresh.timer: Adding 3h 59.727602s random 
Sep 25 01:36:55 Hostsystemd[1]: snapd.refresh.timer: Adding 58.845634s random tim
Sep 25 01:38:13 Hostkernel: [UFW BLOCK] IN=enp2s0 OUT= MAC=01:00:5e:00:00:01:a0:e
lines 2256-2284/2284 (END)

# ===============================================
Tried again here:

Host:~$ sudo systemctl restart nfs-kernel-server
Job for nfs-server.service failed because the control process exited with error code. See "systemctl status nfs-server.service" and "journalctl -xe" for details.
Host:~$