Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+
+==========================
+Installing Ceph on Windows
+==========================
+
+The Ceph client tools and libraries can be natively used on Windows. This avoids
+the need of having additional layers such as iSCSI gateways or SMB shares,
+drastically improving the performance.
+
+Prerequisites
+=============
+
+Supported platforms
+-------------------
+
+Windows Server 2019 and Windows Server 2016 are supported. Previous Windows
+Server versions, including Windows client versions such as Windows 10, might
+work but haven't been tested.
+
+Windows Server 2016 does not provide Unix sockets, in which case some commands
+might be unavailable.
+
+Secure boot
+-----------
+
+The ``WNBD`` driver hasn't been signed by Microsoft, which means that Secure Boot
+must be disabled.
+
+Dokany
+------
+
+In order to mount Ceph filesystems, ``ceph-dokan`` requires Dokany to be
+installed. You may fetch the installer as well as the source code from the
+Dokany Github repository: https://github.com/dokan-dev/dokany/releases
+
+The minimum supported Dokany version is 1.3.1. At the time of the writing,
+Dokany 2.0 is in Beta stage and is unsupported.
+
+Unlike ``WNBD``, Dokany isn't included in the Ceph MSI installer.
+
+MSI installer
+=============
+
+Using the MSI installer is the recommended way of installing Ceph on Windows.
+It can be downloaded from here: https://cloudbase.it/ceph-for-windows/
+
+As mentioned earlier, the Ceph installer does not include Dokany, which has
+to be installed separately.
+
+A server reboot is required after uninstalling the driver, otherwise subsequent
+install attempts may fail.
+
+The following project allows building the MSI installer:
+https://github.com/cloudbase/ceph-windows-installer. It can either use prebuilt
+Ceph and WNBD binaries or compile them from scratch.
+
+Manual installation
+===================
+
+The following document describes the build process and manual installation:
+https://github.com/ceph/ceph/blob/master/README.windows.rst
+
+Configuration
+=============
+
+Please check the `Windows configuration sample`_ to get started.
+
+You'll also need a keyring file. The `General CephFS Prerequisites`_ page provides a
+simple example, showing how a new CephX user can be created and how its secret
+key can be retrieved.
+
+For more details on CephX user management, see the `Client Authentication`_
+and :ref:`User Management <user-management>`.
+
+Further reading
+===============
+
+* `RBD Windows documentation`_
+* `CephFS Windows documentation`_
+* `Windows troubleshooting`_
+
+.. _CephFS Windows documentation: ../../cephfs/ceph-dokan
+.. _Windows configuration sample: ../windows-basic-config
+.. _RBD Windows documentation: ../../rbd/rbd-windows/
+.. _Windows troubleshooting: ../windows-troubleshooting
+.. _General CephFS Prerequisites: ../../cephfs/mount-prerequisites
+.. _Client Authentication: ../../cephfs/client-auth