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21
votes
1answer
3k views

Understanding NFS4 (Linux server)

I've been a bit bothered by NFS4 on Linux. Some information 'out there' seems to conflict with other information, and other information appears hard to find. So here are a couple of things that caught ...
7
votes
4answers
1k views

Securing NFS against SSH tunneling

I was idly reading http://nfs.sourceforge.net/nfs-howto/ar01s06.html trying to understand why localhost exports were bad when I got to the section "6.4. Tunneling NFS Through SSH". Everything in that ...
5
votes
2answers
2k views

/etc/exports & mount option

In my Linux server I have the following options in /etc/exports /home *(rw,sync,no_subtree_check,no_root_squash) And I mount from a Mac using mount -t nfs -o ...
5
votes
3answers
1k views

monitoring nfs with monit

I'd like to monitor NFS mounts and the NFS server process using Monit. On the server, I'd need a PID file, but I can't seem to find a way of getting that created with existing configuration files. ...
4
votes
1answer
261 views

Is there a way to limit the network bandwidth / filesystem use per user over NFS on a Solaris 10 file server?

We have a large file server running on Solaris 10 and about 200 computing nodes running on Ubuntu. The nodes access the file server over NFS. The load gets larger and larger over time. Is there a way ...
4
votes
1answer
250 views

NFS soft mount timeout too slow

We have a VERY busy cluster of servers. Our 16 app servers serve our application off of a local SSD on each machine, but they also process images which are then served off of our cdn. Because of this, ...
3
votes
1answer
986 views

How do I rearange a file tree and then export it over NFS?

I've got a backup server that stores incremental backups in a tree like this: /backups hourly.0 server 1 server 2 hourly.1 server 1 server 2 hourly.2 ...
3
votes
1answer
3k views

unable to write to mount point (nfs-server), getting “Permission denied”

I'm trying to configure NFS between two RHEL7 nodes: first node: [root@ip-10-164-175-246 ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 7.0 (Maipo) [root@ip-10-164-175-246 ~]# ...
3
votes
1answer
1k views

How do I disable NFSv3/v2 connections to a FreeBSD NFSv4 server?

I am using a Kubuntu 11.10 client with a FreeBSD 9.0 server. The server has the following lines in /etc/rc.conf nfs_server_enable="YES" nfsv4_server_enable="YES" nfsuserd_enable="YES" and the ...
3
votes
1answer
36 views

What are some good ways to identify nfs clients that cause high load on nfs server

Sometimes my nfs4 server is under high load. Is there any good tools identify which client causes it. running iotop and nfsstat on nfs server shows only general load information which does not help to ...
3
votes
0answers
815 views

how to tune NFS client on MacOS to get Linux like performance?

I have a NFS server running Linux and exporting a couple of shares. Both Linux and MacOS clients connect to the server, and while with the Linux clients I get ~ 75MB/s write speed, the MacOS clients ...
2
votes
3answers
871 views

How should I install NFS on a linux system?

I have two systems and I need to setup a folder on one of them that is completely read/write-able by the other. Questions: 1) How do I setup NFS on the server(s)? It is not installed as an available ...
2
votes
2answers
2k views

CentOS 6: Can not start NFS

I am unable to start the NFS service. When starting there is no error. But the services are stopt after it. No messages at all in /var/log/messages. Same happens to rpcbind serivce. Any idea what this ...
2
votes
2answers
1k views

Removing and copying files slow on NFS folder

I have a server that hosts images and allows access to one directory for one client over NFS. The directory contains about 70K images and is 12GB big. When I execute commands like cp or rm on the ...
2
votes
2answers
831 views

How to hide shadow-copies in NFS shares?

I have a Ubuntu server with both samba and nfs-server. The server does snapshotting for the exported directory and the samba server uses the snapshots to emulate shadow copies. ( vfs objects = ...
2
votes
1answer
354 views

How to change NFS export allowed IP addresses on Mac OS X Server (Tiger)?

I am running NFS on a Mac OS X Server 10.4. I had originally set up the NFS exports in the GUI, and restricted the IP addresses in the GUI to which it can export. Right now, I only have command-line ...
2
votes
1answer
2k views

Autofs mount nfs issues

I'm having some issues getting autofs to work properly on a new Centos 5.5 installation. Please find Exports from my storage servers: /san/files *(rw,sync,no_subtree_check,no_root_squash) /san/mail ...
2
votes
1answer
33 views

NFS: How to allow a specific user to write in a NFS mount?

I wrote a Nagios check which is supposed to check the time it takes a server to write a file to one of it's mounts. The check is being run by user nagios. The NFS server is configured like so: ...
2
votes
2answers
917 views

Autoscaling and NFS Server

I have a WebServer say WS-1 and a NFS server say NFS-1 setup on AWS. WS-1 is being managed by an elastic load balancer and also autoscaled. It also has an EBS mounted on /var/www which contains all ...
2
votes
1answer
714 views

NFS mounts showing files from other mounts

I have a server that holds ZFS snapshots that I export via NFS to the servers they are backing up so you can restore via a custom application written in-house. The issue is as follows: NOTE: I am ...
2
votes
1answer
3k views

Windows Server 2008 R2 Server for NFS Anonymous Access

I have an NFS share on a Windows 2003 Server that is working perfectly with read/write access using anonymous access. I am moving to a Windows Server 2008 R2 machine and am trying to do the same. I ...
2
votes
1answer
69 views

Performance Penalty with increasing number of NFS exports

We are using NFS for distributing users HOME through our network. Currently we simple export the complete folder containing all HOMEs. Thus each users home is in the end /home/SERVER/USER Now I like ...
2
votes
1answer
542 views

ZFS, NFS and Nexenta

Is this message familiar to someone ? zfs-clu-01a rpcmod: [ID 851375 kern.warning] WARNING: svc_cots_kdup no slots free zfs-clu-01a last message repeated 75220 times We have a lot of trouble ...
2
votes
0answers
357 views

NFS server export list empty

After upgrading my router, I am unable to mount NFS shares from a Debian server on an OS X client. I have updated /etc/exports according to the new IP address of the client (first line previously ...
1
vote
2answers
9k views

Problem with NFS server lockd timing out on Debian linux

We've recently upgraded an NFS server (called "ian"), and after the upgrade, NFS is broken, whereas it wasn't before. The server is now running Debian "lenny", with kernel version 2.6.26-2; it's a ...
1
vote
2answers
1k views

How to create a Mirror of an NFS Share?

For back-up and restoration purposes the purpose of retiring an old server, I will need to create a perfect mirror image of an NFS share. This mirror is not a simple re-direct, but rather, an exact ...
1
vote
2answers
822 views

nfs server on cygwin slow

The setup: We run an instance of cygwin nfsd on a Windows 2008 Server (Xeon 3,2 GHz). There are several Sun Solaris and SunOS machines accessing the shares. This is the exports file: /disk3 ...
1
vote
1answer
28 views

Which match takes precedence when exporting an NFS share?

Say you're exporting an NFS share using IP addresses and netmasks to give different machines different permissions: [/etc/exports] /media/shared 192.168.0.64/26(rw,[...]) 192.168.0.0/24(ro,[...]) ...
1
vote
1answer
420 views

NFS exportfs spamming logs. Is this a broken setup?

I have a NFS server running Ubuntu 10.04, serving an OCFS2 filesystem. The setup is somehow complicated because the server has Heartbeat and Pacemaker installed to make a cluster with another server. ...
1
vote
2answers
402 views

Unknown process on port, lsof no help, nfs-kernel-server?

During a standard security sweep we found out a something was listening on a port unknown to us, 2030, and we are having trouble determining the source. # netstat -anp | grep LIST tcp 0 0 ...
1
vote
2answers
452 views

How to share USB drive via NFS on FreeBSD

I'm trying to share USB hard drive with msdosfs connected like this: mount_msdosfs -o large /dev/da1s1 /mnt/usb I can see mounted drive: /dev/da1s1 on /mnt/usb (msdosfs, local) but when I'm ...
1
vote
3answers
2k views

Which NFS server should we use on Windows Server 2008 R2?

We need to serve NFS shares from our Windows Server 2008 R2 machine to Solaris 5.10 clients, since apparently we are unable to mount SMB shares on our Solaris 5.10 machines :( What's the recommended ...
1
vote
1answer
14 views

slow file server with contradictory values for CPU and CPL in atop

I've got a fileserver (centos 6.3) that slowed down suddenly earlier today. The cluster that mounts it could access other NFS mounts without a problem, but the access to this one was VERY slow. ...
1
vote
1answer
152 views

Share disks through NFS on a CoreOS cluster?

Is it possible for a CoreOS cluster to share disk space, e.g. using NFS? If so, how would one go about this? (e.g. in the scenario where one node has a lot of disk space). This would be useful to ...
1
vote
1answer
34 views

Combining two conditions for configuring NFS Server

Linux newbie here! Having a bit of trouble with writing the NFS config. I want to allow /directory/somedirectory to be accessed (read/write permission) to users that are part of 'group1' AND are also ...
1
vote
1answer
1k views

Fully disable IPv6 for rpc on NFS server - Ubuntu 12.04 LTS

I'm trying to disable IPv6 completely on my NFS server (Ubuntu 12.04 LTS precise), but still seem to have some IPv6 ports listening as shown when I run netstat -lp: Proto Recv-Q Send-Q Local Address ...
1
vote
1answer
133 views

Augeas edit option if it exist, add otherwise - while referencing newly created node

I want to do something along the lines of: set /files/etc/exports/dir[. = '/export/home'][client = '10.0.0.0/8'] /export/home set /files/etc/exports/dir[. = '/export/home'][client = ...
1
vote
1answer
1k views

NFS issue: clients can mount shares as NFSv3 but not as NFSv4 — or how to debug NFS?

Problem description I have a file server running Debian. On it I have a few NFS shares. When I mount the shares from a client using NFSv3 (mount.nfs 10.0.0.51:/exports/video /mnt -o ...
1
vote
1answer
2k views

NFS4 permission denied when userid does not match (even though idmap is working)

I have NFS4 setup with idmapd working correctly. ls -l from the client shows the correct user names, even though the user ids differ between the machines. However, when the user ids do not match, I ...
1
vote
1answer
1k views

NFS share suddenly becomes unresponsive

We've got a setup involving separate web & email servers mounting various shares on the same pysical NFSv3 server. The web server uses a share for apache vhost files, the mailserver uses a share ...
1
vote
0answers
156 views

rsync chgrp Failing on NFS

I am trying to set up NFS on two servers to share files. The owner of the files in question have the same UID and GID on NFS Server and each NFS client. The NFS Server is running on Ubuntu 14.04 and ...
1
vote
0answers
229 views

Confirm IPTables firewall settings for NFS v4 server?

This question has been asked here before but has conflicting and possibly outdated answers. It seems to depend on OS, version of OS, and version of NFS. On a CentOS 6.5 server, the default rules are ...
1
vote
1answer
201 views

NFS mount still connected even after box is disconnected from network

I have a mount between a RHEL 5.6 and a Solaris 6 box acting as the NFS server. My mount options are simply rw,intr. When I disconnect the RHEL linux box from the network I am still able to write ...
1
vote
0answers
85 views

Preventing NFS Denial of Service

I have a NFS4 server running Ubuntu 10.04 Server, on an enterprise environment with 50+ clients. Overall, everything works fine, but from time to time, some client starts making +1000 NFS operations ...
1
vote
0answers
835 views

nfs4 rpc.idmapd not working on one machine

I have an nfs4 server, with fsid=0 exported with no_subtree_check,no_all_squash,no_root_squash I have various clients working fine with this, a mixture of debian and arch, mounting with nfs4 and ...
1
vote
1answer
221 views

Need rpcsec_gss_krb5 and Linux kernel 2.6.35+ on EC2

I am trying to do Kerberos-auth:d NFS4 on EC2. In order to do this, it seems one wants a kernel at least 2.6.35 in order to get decent encryption algos. The distro I could find that provides this is ...
1
vote
1answer
4k views

ubuntu: configure iptables to allow NFS traffic [duplicate]

Possible Duplicate: Running NFS with iptables, change firewall? I need to allow a client to connect to a nfs server. If I disable iptables then NFS works great. I understand that when NFS ...
1
vote
1answer
376 views

problem in exporting a partition on a usb stick as nfs volume

I have a USB disk which has 2 partitions.It gets mounted automatically in /media It is the default behavior in the OS (Lucid 10.04 64 bit) that upon connecting a USB (be it thumb drive or hard disk) ...
0
votes
2answers
49 views

Can NFS server limit the amount of disk space that the NFS client can use?

Let's say in a server A with 100GB partition, user create a NFS export directory. In server B, user mount the NFS share to use it. In server A, can the NFS server limit the amount of disk space that ...
0
votes
1answer
141 views

Read only NFS mount with local writes allowed

I would want to share a directory via NFS only read-only (data should not be corrupted). However I would want the client to be able to use the mounted folder as if it was read write, as transparently ...