How Do I Get Reasonable Server-side NFS Log Output?

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Introduction

As a system administrator, troubleshooting issues with NFS (Network File System) can be a challenging task, especially when the log output is not providing the necessary information to diagnose the problem. In this article, we will explore the steps to configure and optimize the NFS log output on a Debian system, ensuring that you receive the necessary details to resolve any issues that may arise.

Understanding NFS Logging

NFS logging is a critical component in troubleshooting and debugging NFS-related issues. The log output provides valuable information about the NFS server's behavior, including errors, warnings, and other relevant details. However, by default, the NFS log output on Debian systems is not very informative, making it difficult to diagnose problems.

Configuring NFS Logging

To configure NFS logging on a Debian system, you need to edit the NFS configuration file, which is located at /etc/exports. This file contains the NFS share definitions, including the mount options and permissions.

Step 1: Edit the NFS Configuration File

Open the NFS configuration file using a text editor, such as nano or vim:

sudo nano /etc/exports

Step 2: Add the Logging Option

Add the following line to the end of the file to enable logging:

# /etc/exports: the access control list of the file system, see
# /etc/exports(5)


Q&A Section


Q: What is NFS logging, and why is it important?


A: NFS logging is a critical component in troubleshooting and debugging NFS-related issues. The log output provides valuable information about the NFS server's behavior, including errors, warnings, and other relevant details. This information is essential in diagnosing and resolving problems that may arise with NFS.


Q: How do I configure NFS logging on a Debian system?


A: To configure NFS logging on a Debian system, you need to edit the NFS configuration file, which is located at /etc/exports. Add the following line to the end of the file to enable logging:


# /etc/exports: the access control list of the file system, see
# /etc/exports(5)

# /etc/exports: specific mount points
#
# /srv/nfs4/homes (everyone.roam) /srv/nfs4/homes (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/music (everyone.roam) /srv/nfs4/music (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/videos (everyone.roam) /srv/nfs4/videos (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/pictures (everyone.roam) /srv/nfs4/pictures (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/documents (everyone.roam) /srv/nfs4/documents (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/downloads (everyone.roam) /srv/nfs4/downloads (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/backup (everyone.roam) /srv/nfs4/backup (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/iso (everyone.roam) /srv/nfs4/iso (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/iso (everyone.roam) /srv/nfs4/iso (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/iso (everyone.roam) /srv/nfs4/iso (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/iso (everyone.roam) /srv/nfs4/iso (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/iso (everyone.roam) /srv/nfs4/iso (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/iso (everyone.roam) /srv/nfs4/iso (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/iso (everyone.roam) /srv/nfs4/iso (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/iso (everyone.roam) /srv/nfs4/iso (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534) 10.0.1.0/24(rw,sync,no_subtree_check,anonuid=65534,anongid=65534)
# /srv/nfs4/iso (everyone.roam) /srv/nfs4/iso (fsid=0,root_squash,no_subtree_check,async,no_wdelay,insecure,anonuid=65534,anongid=65534) 10.0.0.0/24(rw,sync,no_subtree_check,anonuid=</code></pre>