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103 lines
3.1 KiB
ReStructuredText
103 lines
3.1 KiB
ReStructuredText
.. _ceph-dokan:
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=======================
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Mount CephFS on Windows
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=======================
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``ceph-dokan`` can be used for mounting CephFS filesystems on Windows.
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It leverages Dokany, a Windows driver that allows implementing filesystems in
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userspace, pretty much like FUSE.
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Please check the `installation guide`_ to get started.
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Usage
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=====
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Mounting filesystems
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--------------------
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In order to mount a ceph filesystem, the following command can be used::
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ceph-dokan.exe -c c:\ceph.conf -l x
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This will mount the default ceph filesystem using the drive letter ``x``.
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If ``ceph.conf`` is placed at the default location, which is
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``%ProgramData%\ceph\ceph.conf``, then this argument becomes optional.
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The ``-l`` argument also allows using an empty folder as a mount point
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instead of a drive letter.
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The uid and gid used for mounting the filesystem default to 0 and may be
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changed using the following ``ceph.conf`` options::
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[client]
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# client_permissions = true
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client_mount_uid = 1000
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client_mount_gid = 1000
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If you have more than one FS on your Ceph cluster, use the option
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``--client_fs`` to mount the non-default FS::
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mkdir -Force C:\mnt\mycephfs2
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ceph-dokan.exe --mountpoint C:\mnt\mycephfs2 --client_fs mycephfs2
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CephFS subdirectories can be mounted using the ``--root-path`` parameter::
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ceph-dokan -l y --root-path /a
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If the ``-o --removable`` flags are set, the mounts will show up in the
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``Get-Volume`` results::
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PS C:\> Get-Volume -FriendlyName "Ceph*" | `
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Select-Object -Property @("DriveLetter", "Filesystem", "FilesystemLabel")
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DriveLetter Filesystem FilesystemLabel
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----------- ---------- ---------------
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Z Ceph Ceph
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W Ceph Ceph - new_fs
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Please use ``ceph-dokan --help`` for a full list of arguments.
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Credentials
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-----------
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The ``--id`` option passes the name of the CephX user whose keyring we intend to
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use for mounting CephFS. The following commands are equivalent::
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ceph-dokan --id foo -l x
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ceph-dokan --name client.foo -l x
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Unmounting filesystems
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----------------------
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The mount can be removed by either issuing ctrl-c or using the unmap command,
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like so::
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ceph-dokan.exe unmap -l x
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Note that when unmapping Ceph filesystems, the exact same mount point argument
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must be used as when the mapping was created.
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Limitations
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-----------
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Be aware that Windows ACLs are ignored. Posix ACLs are supported but cannot be
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modified using the current CLI. In the future, we may add some command actions
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to change file ownership or permissions.
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Another thing to note is that cephfs doesn't support mandatory file locks, which
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Windows is heavily rely upon. At the moment, we're letting Dokan handle file
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locks, which are only enforced locally.
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Unlike ``rbd-wnbd``, ``ceph-dokan`` doesn't currently provide a ``service``
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command. In order for the cephfs mount to survive host reboots, consider using
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``NSSM``.
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Troubleshooting
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===============
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Please consult the `Windows troubleshooting`_ page.
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.. _Windows troubleshooting: ../../install/windows-troubleshooting
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.. _installation guide: ../../install/windows-install
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