Problems mounting NFS please help

nokia3310 · 05-01-2013, 05:58 PM

I have been trying to mount NFS file system..tried different machines running Centos 6.4 and i've been running into one problem or the other...i have followed tutorials and have done everything right i believe but i just keep getting errors..the funny part is mounting nfs is not consistent in my opinion..its like a lottery system..it works one day and doesnt the other...just tired of it

I have tried 2 different VMs

1st Centos 6.4 VM error

Code:

mount -v -t nfs -o 'vers=3' 192.168.1.34:/home/vm1/Desktop/nfs /home/vm1/Desktop/nfs-mount

error

Code:

mount: special device 192.168.1.34:/home/vm1/Desktop/nfs does not exist

now it does exist because exportfs gives me

Code:

/home/vm1/Desktop/nfs
             192.168.1.34

2nd Centos 6.4 VM error

Code:

mount -v -t nfs -o 'vers=3' 192.168.1.39:/home/vm1/Desktop/nfs /home/vm1/Desktop/nfs-mount

error

Code:

mount.nfs: timeout set for Wed May  1 18:34:13 2013
mount.nfs: trying text-based options 'vers=3,addr=192.168.1.39'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: portmap query retrying: RPC: Program not registered
mount.nfs: prog 100003, trying vers=3, prot=17
mount.nfs: portmap query failed: RPC: Program not registered
mount.nfs: requested NFS version or transport protocol is not supported

now it does exist because exportfs gives me

Code:

/home/vm1/Desktop/nfs
             <world>

NOTE:

Yes nfs and rpcbind(previously portmap) are all running and yes i added port 2049(nfs) and 111(rpc)
I have even added extra ports from /etc/sysconfig/nfs like 662, 875, 892, 32769, 32803 pretty much all of the ports in that file and uncommented certain things...basically i have done it all....so why am i getting problem mounting this thing? Also realize i was successful one time before inwhich i pretty much did same thing as i have done now but for some reason this thing is more of a luck..one day it works the other it doesn't

TroN-0074 · 05-01-2013, 06:32 PM

Just try

Code:

mount -v -t nfs -o 'vers=3' //192.168.1.34:/nfs /home/vm1/Desktop/nfs-mount

and tell us what happens

you can also try

Code:

mount -t cifs -o username=<username>,password='<password>' //serverIP/share /mountpoint

smedley76 · 05-01-2013, 06:42 PM

have you tried reading this tutorial?

lleb · 05-01-2013, 06:53 PM

what does your exports look like? it should look something like the following::

Code:

cat /etc/exports 
#
#	/etc/exports

#	NFS4
/exports *(rw,insecure,subtree_check,crossmnt,fsid=0)

#	NFSv3
/exports/centos/public *(rw,insecure,no_subtree_check,fsid=3010)
/exports/NFS_TV_Shows *(rw,insecure,no_subtree_check,fsid=3020)

note my exports has both NFSv3 and NFSv4, they are mounted differently. also note the fsid=### are all unique.

when mounting you would use the following:

Code:

mount -t nfs jackknife:/exports /Users/ssma/Desktop/LVM/

note i am not using -o 'vers=3' the default is NFSv3 unless you specify nfs4

Code:

mount -t nfs4  jackknife:/exports /home/users/nfs

nokia3310 · 05-01-2013, 08:04 PM

Quote:

Originally Posted by smedley76

have you tried reading this tutorial?

I have done more than what that tutorial has...you should read my thread/question..the whole thing

nokia3310 · 05-01-2013, 08:06 PM

Quote:

Originally Posted by lleb

what does your exports look like?

1st
cat /etc/exports

Code:

/home/vm1/Desktop/nfs 192.168.1.34(rw,sync)

2nd
cat /etc/exports

Code:

/home/vm2/Desktop/nfs *(rw,sync)

nokia3310 · 05-01-2013, 08:08 PM

Quote:

Originally Posted by TroN-0074

Just try

Code:

mount -v -t nfs -o 'vers=3' //192.168.1.34:/nfs /home/vm1/Desktop/nfs-mount

and tell us what happens

you can also try

Code:

mount -t cifs -o username=<username>,password='<password>' //serverIP/share /mountpoint

1st

Code:

[root@vm1 ~]# mount -v -t ext4 -o 'vers=3' //192.168.1.34:/home/vm1/Desktop/nfs /home/vm1/Desktop/nfs-mount
mount: special device //192.168.1.34:/home/vm1/Desktop/nfs does not exist
[root@vm1 ~]# mount -v -t ext4 -o 'vers=3' //192.168.1.34:/nfs /home/vm1/Desktop/nfs-mount
mount: special device //192.168.1.34:/nfs does not exist

2nd

Code:

[root@vm2 ~]# mount -v -t nfs -o 'vers=3' //192.168.1.39:/nfs /home/vm2/Desktop/nfs4
mount.nfs: Failed to resolve server //192.168.1.39: Name or service not known
[root@vm2 ~]# mount -v -t nfs -o 'vers=3' 192.168.1.39:/home/vm1/Desktop/nfs /home/vm2/Desktop/nfs4
mount.nfs: timeout set for Wed May  1 21:12:43 2013
mount.nfs: trying text-based options 'vers=3,addr=192.168.1.39'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: portmap query retrying: RPC: Program not registered
mount.nfs: prog 100003, trying vers=3, prot=17
mount.nfs: portmap query failed: RPC: Program not registered
mount.nfs: requested NFS version or transport protocol is not supported
[root@vm2 ~]# mount -v -t nfs -o 'vers=3' //192.168.1.39:/home/vm1/Desktop/nfs /home/vm2/Desktop/nfs4
mount.nfs: Failed to resolve server //192.168.1.39: Name or service not known
[root@vm2 ~]# mount -v -t nfs -o 'vers=3' //192.168.1.39:/nfs /home/vm2/Desktop/nfs4
mount.nfs: Failed to resolve server //192.168.1.39: Name or service not known

nokia3310 · 05-02-2013, 02:24 AM

for some reason it worked when i used -vvv option with mount
see below for series of commands...i will like to know what happened

Code:

[root@vm1 ~]# showmount -e
Export list for vm1.system.com:
/home/vm1/Desktop/nfs 192.168.1.34
[root@vm1 ~]# showmount -e 192.168.1.34
Export list for 192.168.1.34:
/home/vm1/Desktop/nfs 192.168.1.34

Code:

[root@vm1 ~]# mount -vvv -o 'vers=3' 192.168.1.34:/home/vm1/Desktop/nfs /home/vm1/Desktop/nfs-mount
mount: fstab path: "/etc/fstab"
mount: mtab path:  "/etc/mtab"
mount: lock path:  "/etc/mtab~"
mount: temp path:  "/etc/mtab.tmp"
mount: UID:        0
mount: eUID:       0
mount: no type was given - I'll assume nfs because of the colon
mount: spec:  "192.168.1.34:/home/vm1/Desktop/nfs"
mount: node:  "/home/vm1/Desktop/nfs-mount"
mount: types: "nfs"
mount: opts:  "vers=3"
final mount options: 'vers=3'
mount: external mount: argv[0] = "/sbin/mount.nfs"
mount: external mount: argv[1] = "192.168.1.34:/home/vm1/Desktop/nfs"
mount: external mount: argv[2] = "/home/vm1/Desktop/nfs-mount"
mount: external mount: argv[3] = "-v"
mount: external mount: argv[4] = "-o"
mount: external mount: argv[5] = "rw,vers=3"
mount.nfs: timeout set for Thu May  2 03:15:10 2013
mount.nfs: trying text-based options 'vers=3,addr=192.168.1.34'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: trying 192.168.1.34 prog 100003 vers 3 prot TCP port 2049
mount.nfs: prog 100005, trying vers=3, prot=17
mount.nfs: trying 192.168.1.34 prog 100005 vers 3 prot UDP port 892
192.168.1.34:/home/vm1/Desktop/nfs on /home/vm1/Desktop/nfs-mount type nfs (rw,vers=3)

Code:

[root@vm1 ~]# telnet 192.168.1.34 2049
Trying 192.168.1.34...
Connected to 192.168.1.34.
Escape character is '^]'.

pan64 · 05-02-2013, 02:41 AM

probably I misunderstood, but:
exportfs runs on a <server-host> and will display <dir> <client-host> and it means <dir> is available from <client-host> (which is normally not the local host).
mount will run on the <client-host> and will try to reach the server and requests access to <dir>.

I do not know if 192.168.1.34 is your client host, server host or both?? What are the IP's of your VMs and the real host?

nokia3310 · 05-02-2013, 02:48 AM

Quote:

Originally Posted by pan64

probably I misunderstood, but:
exportfs runs on a <server-host> and will display <dir> <client-host> and it means <dir> is available from <client-host> (which is normally not the local host).
mount will run on the <client-host> and will try to reach the server and requests access to <dir>.

I do not know if 192.168.1.34 is your client host, server host or both?? What are the IP's of your VMs and the real host?

192.168.1.34 both client and server

chrism01 · 05-02-2013, 06:53 AM

Each VM & host must have a unique/non-shared IP.

I was beginning to wonder this (pan64's qn) about your system myself...

Read Chap 18 http://www.linuxtopia.org/online_boo...ion/index.html
Also howto http://www.linuxhomenetworking.com/w...ccess_with_NFS

nokia3310 · 05-02-2013, 02:04 PM

Quote:

Originally Posted by chrism01

Each VM & host must have a unique/non-shared IP.

I was beginning to wonder this (pan64's qn) about your system myself...

Read Chap 18 http://www.linuxtopia.org/online_boo...ion/index.html
Also howto http://www.linuxhomenetworking.com/w...ccess_with_NFS

So you are saying one cannot use the same VM or system as server and as client?
Well i have seen a video tutorial do that...so why can't i? same thing i am saying about Linux not been consistent..why work in one place and not with me?

michaelk · 05-02-2013, 02:57 PM

Yes, you should be able to mount a nfs share on the same computer that is running the server.

With a quick glance the only difference that I see between commands in your posts is:

Quote:

mount //serverip:/share /mnt/point

vs

Quote:

mount serverip:/share /mnt/point

The second being the correct syntax. I am not sure why -vvv vs -vvv works at the moment.

chrism01 · 05-02-2013, 08:45 PM

That clarifies things a bit. As above, you can nfs export to yourself, but its very unusual, unless its just for experimentation.
Anyway, check those links, they're very helpful.

nokia3310 · 05-02-2013, 11:27 PM

I think i found what the problem was...i the problem was where/location i was creating the nfs and the mount point...when i tried creating nfs in different location it was seemless

Code:

[root@vm3 ~]# exportfs
/share/nfs    	192.168.1.38
[root@vm3 ~]# cat /etc/exports
/share/nfs            192.168.1.38(rw,sync)
[root@vm3 ~]# showmount -e 192.168.1.38
Export list for 192.168.1.38:
/share/nfs 192.168.1.38
[root@vm3 ~]# mount
/dev/mapper/vg_sda2-lv_root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
/dev/sda1 on /boot type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)
/dev/sr0 on /media/VBOXADDITIONS_4.2.12_84980 type iso9660 (ro,nosuid,nodev,uhelper=udisks,uid=500,gid=500,iocharset=utf8,mode=0400,dmode=0500)
//LOCALHOST/samba on /samba-mount type cifs (rw)
[root@vm3 ~]# mount -t nfs -o rw,sync 192.168.1.38:/share/nfs /nfs-mount
[root@vm3 ~]# mount
/dev/mapper/vg_sda2-lv_root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
/dev/sda1 on /boot type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)
/dev/sr0 on /media/VBOXADDITIONS_4.2.12_84980 type iso9660 (ro,nosuid,nodev,uhelper=udisks,uid=500,gid=500,iocharset=utf8,mode=0400,dmode=0500)
//LOCALHOST/samba on /samba-mount type cifs (rw)
192.168.1.38:/share/nfs on /nfs-mount type nfs (rw,sync,vers=4,addr=192.168.1.38,clientaddr=192.168.1.38)