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vfs_ceph - Man Page

Utilize features provided by CephFS


vfs objects = ceph


This VFS module is part of the samba(8) suite.

The vfs_ceph VFS module exposes CephFS specific features for use by Samba.

Ceph is a distributed network file system designed to provide excellent performance, reliability, and scalability. This is a shared library allowing applications to access a Ceph distributed file system via a POSIX-like interface.

This module can be combined with other modules, but it should be the last module in the vfs objects list. Modules added to this list to the right of the ceph entry may not have any effect at all.

vfs_ceph performs mapping between Windows and POSIX Access Control Lists (ACLs). To ensure correct processing and enforcement of POSIX ACLs, the following Ceph configuration parameters are automatically applied:

		client acl type = posix_acl
		fuse default permissions = false


vfs_ceph requires that the underlying share path is a Ceph filesystem.

		vfs objects = ceph
		path = /non-mounted/cephfs/path
		kernel share modes = no

Since vfs_ceph does not require a filesystem mount, the share path is treated differently: it is interpreted as an absolute path within the Ceph filesystem on the attached Ceph cluster. In a ctdb cluster environment where ctdb manages Samba, CTDB_SAMBA_SKIP_SHARE_CHECK=yes must be configured to disable local share path checks, otherwise ctdb will not reach a healthy state.

Note that currently kernel share modes have to be disabled in a share running with the CephFS vfs module for file serving to work properly.


ceph:config_file = path

Allows one to define a ceph configfile to use. Empty by default.

Example: ceph:config_file = /etc/ceph/ceph.conf

ceph:user_id = name

Allows one to explicitly set the client ID used for the CephFS mount handle. Empty by default (use the libcephfs client default).

Example: ceph:user_id = samba

ceph:filesystem = fs_name

Allows one to explicitly select the CephFS file system to use when the Ceph cluster supports more than one file system. Empty by default (use the default file system of the Ceph cluster).

Example: ceph:filesystem = myfs2


This man page is part of version 4.20.0 of the Samba suite.


The original Samba software and related utilities were created by Andrew Tridgell. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed.


03/27/2024 Samba 4.20.0 System Administration tools