Hey guys,

My NFS server has been working really well for a long time now. Both client and server run CentOS 7.2.

However when I just had to remount one of my home directories on an NFS
client, I’m now getting the error when I run mount -a

mount.nfs: an incorrect mount option was specified

This is the corresponding line I have in my fstab file on the client:

nfs1.example.com:/var/nfs/home /home nfs rw 0 0

I get the same error if I try to run the mount command explicitly:

mount -t nfs nfs1.example.com:/var/nfs/home /home mount.nfs: an incorrect mount option was specified

This is the verbose output of that same command:

mount -vvv -t nfs nfs1.example.com:/var/nfs/home /home mount.nfs: timeout set for Sun Oct 2 23:17:03 2016
mount.nfs: trying text-based options
‘vers=4,addr2.xx.xx.xx.xx,clientaddr7.xxx.xx.xx’
mount.nfs: mount(2): Invalid argument mount.nfs: an incorrect mount option was specified

This is the entry I have in my /etc/exports file on the nfs server

/var/nfs/home web2.jokefire.com(rw,sync,no_root_squash,no_all_squash)

I get this same result if the firewall is up or down (for very microscopic slivers of time for testing purposes).

With the firewall down (for testing again very quickly) I get this result from the showmount -e command:

[root@web2:~] #showmount -e nfs1.example.com

Export list for nfs1.example.com:

/var/nfs/varnish varnish1.example.com

/var/nfs/es es3.example.com,es2.example.com,logs.example.com

/var/nfs/www web2.example.com,puppet.example.com,ops3.example.com, ops2.example.com,web1.example.com

/var/nfs/home ansible.example.com,chef.example.com,logs3.example.com, logs2.example.com,logs1.example.com,ops.example.com,lb1.example.com, ldap1.example.com,web2.example.com,web1.lyricgem.com,nginx1.example.com, salt.example.com,puppet.example.com,nfs1.example.com,db4.example.com, db3.example.com,db2.example.com,db1.example.com,varnish2.example.com, varnish1.example.com,es3.example.com,es2.example.com,es1.example.com, repo.example.com,ops3.example.com,ops2.example.com,solr1.example.com, time1.example.com,mcollective.example.com,logs.example.com, hadoop04.example.com,hadoop03.example.com,hadoop02.example.com, hadoop01.example.com,monitor3.example.com,monitor2.example.com, monitor1.example.com,web1.example.com,activemq1.example.com

With the firewall on the nfs server up (as it is all the time other than this short test), I get back this result:

showmount -e nfs1.example.com

clnt_create: RPC: Port mapper failure – Unable to receive: errno 113 (No route to host)

This is a list of ports I have open on the NFS server:

[root@nfs1:~] #firewall-cmd –list-all

public (default, active)

interfaces: eth0

sources:

services: dhcpv6-client ssh

ports: 2719/tcp 9102/tcp 52926/tcp 111/tcp 25/tcp 875/tcp 54302/tcp
46666/tcp 20048/tcp 2692/tcp 55982/tcp 2049/tcp 17123/tcp 42955/tcp

masquerade: no

forward-ports:

icmp-blocks:

rich rules:

rule family=”ipv4″ source address=”xx.xx.xx.x/32″ port port=”5666″
protocol=”tcp” accept

So I have two problems I need to solve. 1) How do I open the firewall ports on the nfs server so that clients can contact it? I’m using firewalld on the nfs server. And 2) why am I getting an error saying that “an incorrect mount option was specified”?

Thanks,

Tim