[SOLVED] NFS4, showmount rpc errors yet directories are mounted.

DBabo · 11-29-2014, 08:12 PM

i'm running Scientific Linux 6.5 ( aka Centos 6.5) and attempting to export directories over NFS4 over to Fedora 20.

host where i'm exporting from is "server" and the client is "toshiba". I took iptables down on both hosts:

Code:

[root@toshiba ~]# service iptables status
Redirecting to /bin/systemctl status  iptables.service
iptables.service
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)
[root@server ~]# service iptables status
iptables: Firewall is not running.

Server config:
[root@server ~]# ip addr
<cut>
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether <cut>
    inet 192.168.1.204/24 brd 192.168.1.255 scope global eth0

Client:
[root@toshiba ~]# ip addr
<cut>
3: wlp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 2<cut>
    inet 192.168.1.101/24 brd 192.168.1.255 scope global wlp2s0

[root@toshiba ~]# traceroute server
traceroute to server (192.168.1.204), 30 hops max, 60 byte packets
 1  server (192.168.1.204)  1.113 ms  1.160 ms  1.929 ms

[root@toshiba ~]# cat /etc/hosts
127.0.0.1   toshiba toshiba.home 
::1         toshiba toshiba.home
192.168.1.204 server server.home

Nmap scan report for server (192.168.1.204)
Host is up (0.0011s latency).
Not shown: 993 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
111/tcp  open  rpcbind
139/tcp  open  netbios-ssn
445/tcp  open  microsoft-ds
2049/tcp open  nfs
5432/tcp open  postgresql
6000/tcp open  X11
MAC Address: <cut> (Giga-byte Technology Co.)

Nmap done: 1 IP address (1 host up) scanned in 36.11 seconds

[root@toshiba ~]# rpcinfo -p server
   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    4   tcp   2049  nfs
    100003    4   udp   2049  nfs
    100021    1   udp  32774  nlockmgr
    100021    3   udp  32774  nlockmgr
    100021    4   udp  32774  nlockmgr
    100021    1   tcp  32808  nlockmgr
    100021    3   tcp  32808  nlockmgr
    100021    4   tcp  32808  nlockmgr

[root@toshiba ~]# showmount -a server
clnt_create: RPC: Program not registered

[root@toshiba ~]# mount -vv -t nfs4 server:/mnt/storage/Video /media
mount.nfs4: timeout set for Sat Nov 29 20:53:49 2014
mount.nfs4: trying text-based options 'addr=192.168.1.204,clientaddr=192.168.1.101'
[root@toshiba ~]# mount
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
<cut>
server:/mnt/storage/Video on /media type nfs4 (rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=192.168.1.101,local_lock=none,addr=192.168.1.204)

Yet, in the messages on toshiba(client) i see:

Code:

Nov 29 21:16:25 toshiba kernel: [24457.776551] RPC: AUTH_GSS upcall failed. Please check user daemon is running.
Nov 29 21:16:25 toshiba kernel: RPC: AUTH_GSS upcall failed. Please check user daemon is running.

ls -l /media - i can see files.

All right, lets go over to the server:

Code:

[root@server ~]# rpcinfo server
   program version netid     address                service    owner
    100000    4    tcp6      ::.0.111               portmapper superuser
    100000    3    tcp6      ::.0.111               portmapper superuser
    100000    4    udp6      ::.0.111               portmapper superuser
    100000    3    udp6      ::.0.111               portmapper superuser
    100000    4    tcp       0.0.0.0.0.111          portmapper superuser
    100000    3    tcp       0.0.0.0.0.111          portmapper superuser
    100000    2    tcp       0.0.0.0.0.111          portmapper superuser
    100000    4    udp       0.0.0.0.0.111          portmapper superuser
    100000    3    udp       0.0.0.0.0.111          portmapper superuser
    100000    2    udp       0.0.0.0.0.111          portmapper superuser
    100000    4    local     /var/run/rpcbind.sock  portmapper superuser
    100000    3    local     /var/run/rpcbind.sock  portmapper superuser
    100003    4    tcp       0.0.0.0.8.1            nfs        superuser
    100003    4    udp       0.0.0.0.8.1            nfs        superuser
    100003    4    tcp6      ::.8.1                 nfs        superuser
    100003    4    udp6      ::.8.1                 nfs        superuser
    100021    1    udp       0.0.0.0.128.6          nlockmgr   superuser
    100021    3    udp       0.0.0.0.128.6          nlockmgr   superuser
    100021    4    udp       0.0.0.0.128.6          nlockmgr   superuser
    100021    1    tcp       0.0.0.0.128.40         nlockmgr   superuser
    100021    3    tcp       0.0.0.0.128.40         nlockmgr   superuser
    100021    4    tcp       0.0.0.0.128.40         nlockmgr   superuser
    100021    1    udp6      ::.128.6               nlockmgr   superuser
    100021    3    udp6      ::.128.6               nlockmgr   superuser
    100021    4    udp6      ::.128.6               nlockmgr   superuser
    100021    1    tcp6      ::.128.40              nlockmgr   superuser
    100021    3    tcp6      ::.128.40              nlockmgr   superuser
    100021    4    tcp6      ::.128.40              nlockmgr   superuser

[root@server ~]# service nfs status
rpc.svcgssd is stopped
rpc.mountd (pid 5658) is running...
nfsd (pid 5666) is running...
[root@server ~]# service rpcbind status
rpcbind (pid  5527) is running...
[root@server ~]# ps -ef | grep rpc
root      1739     2  0 Nov14 ?        00:00:00 [rpciod/0]
root      1740     2  0 Nov14 ?        00:00:00 [rpciod/1]
root      1741     2  0 Nov14 ?        00:00:00 [rpciod/2]
root      1742     2  0 Nov14 ?        00:00:00 [rpciod/3]
root      1743     2  0 Nov14 ?        00:00:00 [rpciod/4]
root      1744     2  0 Nov14 ?        00:00:00 [rpciod/5]
root      1745     2  0 Nov14 ?        00:00:00 [rpciod/6]
root      1746     2  0 Nov14 ?        00:00:00 [rpciod/7]
rpcuser   1752     1  0 Nov14 ?        00:00:00 rpc.statd -p 662 -o 2020
rpc       5527     1  0 20:15 ?        00:00:00 rpcbind
root      5658     1  0 20:17 ?        00:00:00 rpc.mountd -p 892 --no-nfs-version 2 --no-nfs-version 3
root      5689     1  0 20:17 ?        00:00:00 rpc.idmapd
root      5925  4704  0 20:54 pts/0    00:00:00 grep rpc

[root@server ~]# date
Sat Nov 29 20:55:12 EST 2014

[root@server ~]# cat /etc/exports 
/mnt/storage/Video 192.168.1.150(ro,async,anonuid=1000,anongid=1000) 192.168.1.101(rw,async)

[root@server ~]# export -ra
export    exportfs  
[root@server ~]# exportfs -ra


[root@server ~]# grep -v ^# /etc/sysconfig/nfs 
MOUNTD_NFS_V2="no"
MOUNTD_NFS_V3="no"
LOCKD_TCPPORT=32808
LOCKD_UDPPORT=32774
RPCNFSDARGS="-N 2 -N 3"
RPCNFSDCOUNT=1
MOUNTD_PORT=892
STATD_PORT=662
STATD_OUTGOING_PORT=2020

[root@server ~]# rpcinfo -p
   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    4   tcp   2049  nfs
    100003    4   udp   2049  nfs
    100021    1   udp  32774  nlockmgr
    100021    3   udp  32774  nlockmgr
    100021    4   udp  32774  nlockmgr
    100021    1   tcp  32808  nlockmgr
    100021    3   tcp  32808  nlockmgr
    100021    4   tcp  32808  nlockmgr

[root@server ~]# showmount -e server
clnt_create: RPC: Program not registered
[root@server ~]# showmount -e localhost
clnt_create: RPC: Program not registered
[root@server ~]# showmount -e lo
clnt_create: RPC: Unknown host
[root@server ~]# showmount -e 192.168.1.204
clnt_create: RPC: Program not registered
[root@server ~]# showmount -e 127.0.0.1
clnt_create: RPC: Program not registered

[root@server ~]# cat /etc/hosts.allow 

#portmap: 192.168.1.150 , 192.168.1.101
rpcbind: 192.168.1.150, 192.168.1.101
[root@server ~]# cat /etc/hosts.deny 
portmap:ALL

I'm not sure if i can/should/permit to use rpcbind and (mix it with) portmap in hosts.* files?
And i have no idea why i'm getting that error during showmount on both server and client, yet i can mount it on the client (toshiba).

any ideas are very much welcome, because i'm in the deep ... mmmm.... corner ( let's put it midly )

DBabo · 11-29-2014, 08:43 PM

ahhhh. showmount does NOT work with v4 . it has to have V2/3 enabled. this is great (sarcasm)....

so how do i know what is exported from the server then?

P.S. Here is the confirmation of that. Yet another problem is that the err message i've got ("clnt_create: RPC: Program not registered") is different and misleading. Showmount version o have is 1.2.3 from nfs-utils-1.2.3-39.el6.x86_64

DBabo · 12-02-2014, 01:16 PM

Filed https://bugzilla.redhat.com/show_bug.cgi?id=1169939 as per maintainer's suggestion.