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Signed-off-by: David Disseldorp <ddiss@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org> Autobuild-User(master): David Disseldorp <ddiss@samba.org> Autobuild-Date(master): Tue May 14 23:31:27 UTC 2019 on sn-devel-184
131 lines
3.6 KiB
XML
131 lines
3.6 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
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<refentry id="vfs_ceph_snapshots.8">
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<refmeta>
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<refentrytitle>vfs_ceph_snapshots</refentrytitle>
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<manvolnum>8</manvolnum>
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<refmiscinfo class="source">Samba</refmiscinfo>
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<refmiscinfo class="manual">System Administration tools</refmiscinfo>
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<refmiscinfo class="version">&doc.version;</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>vfs_ceph_snapshots</refname>
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<refpurpose>
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Expose CephFS snapshots as shadow-copies
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>vfs objects = ceph_snapshots</command>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>DESCRIPTION</title>
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<para>This VFS module is part of the
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<citerefentry><refentrytitle>samba</refentrytitle>
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<manvolnum>8</manvolnum></citerefentry> suite.</para>
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<para>
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The <command>vfs_ceph_snapshots</command> VFS module exposes
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CephFS snapshots for use by Samba. When enabled, SMB clients
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such as Windows Explorer's Previous Versions dialog, can
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enumerate snaphots and access them via "timewarp" tokens.
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</para>
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<para>
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This module can be combined with <command>vfs_ceph</command>,
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but <command>vfs_ceph_snapshots</command> must be listed first
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in the <command>vfs objects</command> parameter list.
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</para>
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<para>
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CephFS support for ceph.snap.btime virtual extended attributes
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is required for this module to work properly. This support was
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added via https://tracker.ceph.com/issues/38838.
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</para>
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</refsect1>
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<refsect1>
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<title>CONFIGURATION</title>
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<para>
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When used atop <command>vfs_ceph</command>,
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<command>path</command> refers to an absolute path within the
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Ceph filesystem and should not be mounted locally:
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</para>
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<programlisting>
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<smbconfsection name="[share]"/>
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<smbconfoption name="vfs objects">ceph_snapshots ceph</smbconfoption>
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<smbconfoption name="path">/non-mounted/cephfs/path</smbconfoption>
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<smbconfoption name="kernel share modes">no</smbconfoption>
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</programlisting>
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<para>
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<command>vfs_ceph_snapshots</command> can also be used atop a
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kernel CephFS mounted share path, without
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<command>vfs_ceph</command>. In this case Samba's default VFS
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backend <command>vfs_default</command> is used:
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</para>
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<programlisting>
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<smbconfsection name="[share]"/>
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<smbconfoption name="vfs objects">ceph_snapshots</smbconfoption>
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<smbconfoption name="path">/mnt/cephfs/</smbconfoption>
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</programlisting>
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</refsect1>
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<refsect1>
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<title>OPTIONS</title>
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<variablelist>
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<varlistentry>
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<term>ceph:snapdir = subdirectory</term>
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<listitem>
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<para>
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Allows for the configuration of the special CephFS
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snapshot subdirectory name. This parameter should only
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be changed from the ".snap" default if the ceph.conf
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<command>client snapdir</command> or
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<command>snapdirname</command> mount option settings
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are changed from their matching ".snap" defaults.
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</para>
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<para>
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Default:
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<smbconfoption name="ceph:snapdir">.snap</smbconfoption>
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</para>
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<para>
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Example:
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<smbconfoption name="ceph:snapdir">.snapshots</smbconfoption>
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>VERSION</title>
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<para>
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This man page is part of version &doc.version; of the Samba suite.
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</para>
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</refsect1>
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<refsect1>
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<title>AUTHOR</title>
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<para>The original Samba software and related utilities
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were created by Andrew Tridgell. Samba is now developed
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by the Samba Team as an Open Source project similar
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to the way the Linux kernel is developed.</para>
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</refsect1>
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</refentry>
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