Questions tagged [nfs4]

Network File System version 4 (NFSv4)

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Where would I find background documentation on nfsidmap?

I'm trying to set up an NFSv4 client, and can't find useful documentation. The manpage for nfsidmap(5) (I'm concerned with CentOS on the client-side, as it happens) describes a particular tool, which ...
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NFS server daemon fails to start at boot

I´m trying to export an external disk, so, I configured my nfs-server service to wait for disk1 to mount, however it fails. This is the situation after boot: $ systemctl status nfs-server.service ● ...
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Working with raw uids and gids and no_root_squash with NFS4

Due to a very unfortunate situation that I have no control over, I am currently forced to setup ownerships, groups and ACL on an NFS server from a machine that has nothing to do with the users on the ...
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63 views

DR for Docker persistent storage on NFS

At the moment we have a Docker Swarm setup with DTR, UCP etc using a local NFS server for DTR and persistent storage. We would like to have a DR setup at a remote data center which has high speed ...
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Is there any performance or deadlock impact in multiple instances writing to a single log file in NFS

I have to deploy Drupal-7 web app under AWS load balancer. For better log management, I want to keep single web app log file for all the VM instances under the load balancer. Log location in instances ...
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18 views

Issue mounting Ubuntu NFSv4 share on Windows 2012 R2

I'm having issues mounting an NFS share (Ubuntu 16.04) using NFSv4 on Windows 2012 R2 from what I understand 2012 R2 supports NFS v4.1, it looks to be defaulting to NFsv3 when running nfsstat -m. I'm ...
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75 views

Proper way to categorise files stored in AWS EFS which mounted to different types of Webapps instances

I have to setup single AWS EFS storage for multiple web apps instances. As I am using PHP and Java based web apps, I want to separate the files from Java and PHP instances directory wise inside the ...
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Solving nfs “Stale file handle” caused by server reboot

This is a follow-up question to "Stale NFS file handle" after reboot as its solution doesn't work for me. My case is simple, after server rebooted, I'm getting "Stale file handle" on ...
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Permission issues with NFS exporting FUSE (mergerfs) filesystem (git permission issues)

I have a mergerfs filesystem /data which merges /data1 /data2 /data3 /data4, each of which are ext4 filesystems. I am exporting the directory /data/coihome (actually a directory in /data3) via NFS to ...
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how should I proceed debugging NFS4+Kerberos?

I have a working NFS4 setup. The server is called bluebox.lan and it exports: /mnt bluescreen.lan(rw,no_root_squash,crossmnt) The client is called bluescreen.lan and it is able to mount bluebox's ...
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63 views

Are “*_squash” (all_squash/no_all_squash, root_squash/no_root_squash, anon_uid/anon_gid) options in NFSv4 still rellevant?

Nowadays NFSv4 uses /etc/idmapd.conf to do the mapping of usernames between server and client machines. So I don't get the point of having these "*_squash" options, which seems very "NFSv3-flavoured" ...
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FreeIPA with multiple domains not mapping ids correctly on NFS

I’ve got FreeIPA setup where I have multiple domains for client machines depending on their geography. For example, ca.example.com, and ny.example.com. I have a NFS server in nfs-server.ny.example....
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485 views

What is the current status of pNFS on Ubuntu?

There is a lot of confusing information out there on pNFS, and I have some very simple questions: How can I check if it is running/enabled/active on my system? Is pNFS widely available today or still ...
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541 views

NFS file does not show up in listing but is there

I have an NFS server with a mount point that is mounted on several servers. I can access the files on all of them. On all of the clients, I am getting the following behaviour. $ ls _index_ssl....
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379 views

NFS low performance after some activity

I have a Linux cluster with nodes that have NFS mountpoints from a central server (actually the nodes are diskless and are booted over PXE). After some activity on the NFS mountpoints from the nodes, ...
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impact on I/O using the same NIC for backup

I have a one node Ganeti cluster with KVM hypervisor with multiple VM's, one of them is backup VM with one NIC, which runs a backup software to make backups of other VM's and my own notebook. The ...
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147 views

rsync closed failed error

I'm getting close failed error when copying files to nfs share randomly. what could be possible reason ? rsync version 3.1.1 rsync: close failed on "/nfs_share/data/.99865579700_0.gz.LgfpIk": Input/...
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CentOS 7 NFSv4 server + Fedora 30 NFSv4 client: command 'quota' does not work

I've got a CentOS 7 box serving NFSv3/4 exports - the served filesystem (users' home directories) is an ext4 partition (so, no XFS, which I get is more complicated for quotas) configured with usrquota ...
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Failing fast with an EFS NFS mount

We run a Java application distributed across a number of servers, part of which involves the writing and reading of shared files. This side of the application is currently held together by a bunch of ...
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EFS NFS performance on LIST operations

I have an AWS EFS drive mounted on a FTP server. I am seeing issues where performance becomes really poor occasionally. The public directory has about 10,000 small text files and under heaviish ...
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NFS issues with K8S

we're running a bunch of gitlabs on a k8s cluster. For persistence, we're using NFS mounts, specifically, we have one NFS export that is shared by all gitlabs. Currently, we have it mounted on all ...
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Use nfs version 3 on RHEL 7

I tested using nfs version 3 on my lab system, and it works fine. [root@server2 ~]# tail -1 /etc/mtab server1:/nfs /nfs nfs rw,relatime,vers=3,rsize=262144,wsize=262144,namlen=255,hard,proto=tcp,...
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NFS4 idmap with IBM GPFS storage and AD

I am trying to connect a Linux machine to a new IBM GPFS-based storage via NFS4. The Linux machine uses an LDAP server and the IBM storage uses another ActiveDirectory. For now, we are in a test net, ...
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80 views

Parallel MPI_File_open failed on NFSv4 but ran on NFSv3

When using NFSv4, my client reported that their MPI program sometimes report file cannot open or file not found error. I compiled a sample MPI-IO program and confirmed that, if the MPI procs on ...
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106 views

Using SID+ACL with NFS and Winbind (NOT SSSD) from a Linux file server

I've inherited a domain using a Samba 4 active directory on Ubuntu 14.04 and having a heterogeneous client environment of Windows/Ubuntu 18 clients. I have tried setting up clients using sssd, ...
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56 views

How to get verbose information from `zfs get`

Running Ubuntu 14... "14.04.5 LTS, Trusty Tahr" ...with Ubuntu zfs... libzfs2/trusty,now 0.6.5.11-1~trusty amd64 [installed,automatic] mountall/trusty,now 2.53-zfs1 amd64 [installed,upgradable to: ...
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202 views

Linux NFS (v4) user namespace file permissions

I am trying to set up a rootless container setup using podman and am having a problem with file permissions on NFS (running NFSv4). Within the user namespace, I am able to create files as root on any ...
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697 views

fsc option is ignored when trying to use cachefilesd on ubuntu 18.04

I'm trying to set up cachefilesd on an nfs share with one of my servers. It's not working. The service is running, my drives are mounted, but it seems as if the "fsc" option is completely ignored. ...
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181 views

NFS server as a client of itself performs very poorly

I have set up an NFSv4 server. I am sharing files with Linux machines in a VM farm and Windows 7, 8, and 10 machines, so I need to share files with both NFS and Samba1. In the past, I have done this ...
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481 views

NFS client intermittent performance issues (backlog queue wait?)

I have a weird issue with one of the NFS clients (Ubuntu 16.04 LTS). I have been working for the past few days to try and debug this, but so far without success. After I mount the partition, ...
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238 views

NFS3/4 Performance Issues (Lock-ups) with macOS client using Kerberos

I am trying to access an NFS share using macOS High Sierra and I am having momentary system lock-up issues regardless of whether I use Finder or the command line to copy files to the share. For ...
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71 views

Recommended application and storage server network link over NFS

Background: I have a RHEL6 storage server (lots of HDs) and a RHEL6 Application server (little storage, lots of CPU/memory). They are currently connected to a 1GB Catalyst 2960-X switch. There is ...
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248 views

Does nfs persisent volume mount work in a single node kubernetes cluster?If so,how?

I have tried with the volume type 'Hostpath' and it worked fine.Apart from 'HostPath' are there any other volumes supporting single node cluster?
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487 views

macOS High Sierra issues mounting Kerberized NFSv4 shares

I'm using FreeIPA for LDAP/Kerberos and I've created a principal for a storage appliance (Dell/EMC UnityVSA VM). I have setup the VSA with a keytab from IPA, I've also setup within the VSA the LDAP ...
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1answer
4k views

What services and ports are required for NFSv4?

I've been trying to find the definitive answer to this question, but I'm getting conflicting results due to various NFS versions out there. I've configured NFSv4 by following https://help.ubuntu.com/...
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728 views

Securing NFSv4 WITHOUT Kerberos on a public cloud?

I've lost enough hair trying to setup this Kerberos nonsense. Is there any way to secure an NFS v4 setup without using Kerberos on a public cloud, i.e: all servers have a public IP (there is no ...
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2k views

Encoding issue between NFSv3 and NFSv4

We have some issues regarding NFS share regarding filenames encoding. We were previously mounting as NFSv3 and started to use NFSv4 and some files previously created, with special characters (...
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80 views

Can not umount NFS directory (ignored)

I have a few servers that have NFS mounted directories. I have shut down the service that is using them, and fuser -m doesnt show any other processes using any files there. When i do "umount -at nfs" ...
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1answer
1k views

What exactly does nfs4_disable_idmapping parameter do?

I've been experimenting with user/group ID mapping (translation) in NFSv4. What I want to achieve is name based ID translation, that is independent of the actual UID/GID on the server and clients. ...
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1k views

How to configure NFSv4 mount so that owner of files created by root user on NFS client appear as 'root:root', rather than 'nobody:nogroup' on client?

I have an Ubuntu 16.04 server on which the Nextcloud snap is installed (nextcloud.lan), and an Ubuntu 16.04 NAS configured to serve files over NFSv4 (nas.lan). I would like to mount directory /var/...
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256 views

How does NFS figure out which Kerberos creds / principals to give access to?

I'm setting up NFS with Kerberos and following various guides, like NFSv4 with Kerberos on Ubuntu Wiki and How To Use Kerberos to Control Access to NFS Network Shares, amongst others. All guides ...
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85 views

Diagnosing NFSv4 Authentication Issues

I've got a couple of NFSv4 shares (with Kerberos authentication). Most of the time they work quite well, but when there's an issue they can be a pain to fix. I put this down to them being quite ...
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867 views

How do you setup an NFS4 server that utilises Kerberos authentication from an Active Directory KDC using CentOS Linux release 7.6.1810 (Core)

How do you setup an NFS4 server with Kerberos from Active Directory? I can install and configure an NFS4 server and connect to it, but I can not get Kerberos to work under any circumstances where the ...
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271 views

Can 2 servers share the same ocfs2 FS via NFS?

The problem is the following: I have 2 servers that have a FS mounted as ocfs2: root [server01]% mount | grep ocfs2 ocfs2_dlmfs on /dlm type ocfs2_dlmfs (rw) /dev/sddlmam1 on /share type ocfs2 (rw,...
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792 views

Why isn't NFS over SSH transparent to NFS?

NFS over LAN seems to work as expected - one downloads nfs-utils rpm, makes a share, modifies ownership and SEL, allows nfs in firewalld, launches nfs-server daemon, and everything is good to go. ...
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260 views

rsnapshot through nfs: failed to preserve ownership|cannot access errors

Trying to rsnapshot to an nfs share I get some ownership and access errors, even if I can visibly do any operation on my shares with UID 1000 and GID 1000 on both server/client. Server exports /etc/...
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648 views

How does the Linux NFS server implementation of setclientid work?

Does anyone understand the NFS protocol (Version 4) or the Linux NFS server implementation of it well enough to explain how setclientid negotiates authentication? Background: I have a CentOS 7 ...
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521 views

Contents of NFS folder disappear after application attempts to read it

I recently ran into an issue with nfs on my nfs clients related to one specific shared directory. None of the applications I use (Sonarr & Plex) which are both on different VMs are able to read ...
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163 views

~1300ms latency touching file on nfs mount

I have an NFS mount where the server is on the same subnet as the client. When I time touch testempty from the client, I get: touch testempty 0.00s user 0.00s system 0% cpu 1.325 total The time ...
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124 views

Would a firewall occasionally disconnect an CentOS 7.3 NFS client?

When large read and write operations are conducted on a NFSv4 share on a CentOS 7.3 client, I notice that the NFS mounts often time out. Does a fresh, out-of-the-box installation of CentOS 7.3 ...

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