How does automount work on NFS?

How does automount work on NFS?

Autofs is an automount daemon that manages mount points as needed. In short, it only mounts a given share when that share is being accessed and are unmounted after a defined period of inactivity.

What is automount in NFS?

automount starts when the command automount(NADM) is executed on a host that will operate as an NFS client. Execution typically takes place at boot time from the command /etc/nfs, but automount can also be executed from the command line. Mandatory for automount operation are one or more files, called “maps”.

How do I use autofs to mount NFS shares?

Steps to mount nfs share using Autofs in CentOS 7

1. Step:1 Install autofs package.
2. Step:2 Edit the Master map file (/etc/auto.
3. Step:2 Create a map file ‘/etc/auto.
4. Step:3 Start the auotfs service.
5. Step:3 Now try to access the mount point.
6. Step:1 Install the autofs package using apt-get command.

How does Linux automount work?

Autofs is a client-side service that automatically mounts the appropriate file system. When a client attempts to access a file system that is not presently mounted, the autofs file system intercepts the request and calls automountd to mount the requested directory.

What does automount command do?

The automount command is used as an administration tool for AutoFS. It installs AutoFS mount points and associates an automount map with each mount point. The AutoFS file system monitors attempts to access directories within it and notifies the automountd daemon.

How do I permanently mount NFS share in Linux?

Use the following procedure to automatically mount an NFS share on Linux systems:

1. Set up a mount point for the remote NFS share: sudo mkdir /var/backups.
2. Open the /etc/fstab file with your text editor : sudo nano /etc/fstab.
3. Run the mount command in one of the following forms to mount the NFS share:

What is automount in Linux?

The automount program is used to manage mount points for autofs, the inlined Linux automounter. automount works by reading the auto. master(8) map and sets up mount points for each entry in the master map allowing them to be automatically mounted when accessed.

Why NFS is used?

NFS, or Network File System, was designed in 1984 by Sun Microsystems. This distributed file system protocol allows a user on a client computer to access files over a network in the same way they would access a local storage file. Because it is an open standard, anyone can implement the protocol.

How to auto Mount NFS share in Linux using autofs?

-fstype=nfs is the file system type & ‘rw,soft,intr’ are mount options. ‘192.168.1.21:/db_backup’ is nfs share location. Step:3 Start the auotfs service. Step:3 Now try to access the mount point. Mount point of nfs share will be ‘/dbstuff/db_backup’. When we try access the mount point then autofs service will mount nfs share automatically.

When to use autofs to unmount filesystem?

Autofs is a service offered us to automatically mount the filesystem when they need. It can also unmount the filesystem when not in use for a particular predefined timeout value.

Which is the mount point in NFS the server?

Note: The “/nfs/The-Server” folder isn’t a mount point itself, but houses mount points. This folder is therefore sometime srefered to as a “automount” folder, i.e. the mount point’s parent folder. The second entry could be anything to your liking.

How long does it take for NFS share to umount?

NFS Share will automatically umount after 180 seconds or 3 minutes if don’t perform any action on the share. Create a map file and add the following line. Save and exit the file.