Adding upstream version 14.2.21.upstream/14.2.21upstream

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

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diff --git a/doc/radosgw/frontends.rst b/doc/radosgw/frontends.rst
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+.. _rgw_frontends:
+
+==============
+HTTP Frontends
+==============
+
+.. contents::
+
+The Ceph Object Gateway supports two embedded HTTP frontend libraries
+that can be configured with ``rgw_frontends``. See `Config Reference`_
+for details about the syntax.
+
+Beast
+=====
+
+.. versionadded:: Mimic
+
+The ``beast`` frontend uses the Boost.Beast library for HTTP parsing
+and the Boost.Asio library for asynchronous network i/o.
+
+Options
+-------
+
+``port`` and ``ssl_port``
+
+:Description: Sets the ipv4 & ipv6 listening port number. Can be specified multiple
+              times as in ``port=80 port=8000``.
+:Type: Integer
+:Default: ``80``
+
+
+``endpoint`` and ``ssl_endpoint``
+
+:Description: Sets the listening address in the form ``address[:port]``, where
+              the address is an IPv4 address string in dotted decimal form, or
+              an IPv6 address in hexadecimal notation surrounded by square
+              brackets. Specifying a IPv6 endpoint would listen to v6 only. The
+              optional port defaults to 80 for ``endpoint`` and 443 for
+              ``ssl_endpoint``. Can be specified multiple times as in
+              ``endpoint=[::1] endpoint=192.168.0.100:8000``.
+
+:Type: Integer
+:Default: None
+
+
+``ssl_certificate``
+
+:Description: Path to the SSL certificate file used for SSL-enabled endpoints.
+
+:Type: String
+:Default: None
+
+
+``ssl_private_key``
+
+:Description: Optional path to the private key file used for SSL-enabled
+              endpoints. If one is not given, the ``ssl_certificate`` file
+              is used as the private key.
+
+:Type: String
+:Default: None
+
+``tcp_nodelay``
+
+:Description: If set the socket option will disable Nagle's algorithm on 
+              the connection which means that packets will be sent as soon 
+              as possible instead of waiting for a full buffer or timeout to occur.
+
+              ``1`` Disable Nagel's algorithm for all sockets.
+
+              ``0`` Keep the default: Nagel's algorithm enabled.
+
+:Type: Integer (0 or 1)
+:Default: 0
+
+``max_connection_backlog``
+
+:Description: Optional value to define the maximum size for the queue of
+              connections waiting to be accepted. If not configured, the value
+              from ``boost::asio::socket_base::max_connections`` will be used.
+
+:Type: Integer
+:Default: None
+
+
+Civetweb
+========
+
+.. versionadded:: Firefly
+
+The ``civetweb`` frontend uses the Civetweb HTTP library, which is a
+fork of Mongoose.
+
+
+Options
+-------
+
+``port``
+
+:Description: Sets the listening port number. For SSL-enabled ports, add an
+              ``s`` suffix like ``443s``. To bind a specific IPv4 or IPv6
+              address, use the form ``address:port``. Multiple endpoints
+              can either be separated by ``+`` as in ``127.0.0.1:8000+443s``,
+              or by providing multiple options as in ``port=8000 port=443s``.
+
+:Type: String
+:Default: ``7480``
+
+
+``num_threads``
+
+:Description: Sets the number of threads spawned by Civetweb to handle
+              incoming HTTP connections. This effectively limits the number
+              of concurrent connections that the frontend can service.
+
+:Type: Integer
+:Default: ``rgw_thread_pool_size``
+
+
+``request_timeout_ms``
+
+:Description: The amount of time in milliseconds that Civetweb will wait
+              for more incoming data before giving up.
+
+:Type: Integer
+:Default: ``30000``
+
+
+``ssl_certificate``
+
+:Description: Path to the SSL certificate file used for SSL-enabled ports.
+
+:Type: String
+:Default: None
+
+``access_log_file``
+
+:Description: Path to a file for access logs. Either full path, or relative
+			  to the current working directory. If absent (default), then
+			  accesses are not logged.
+
+:Type: String
+:Default: ``EMPTY``
+
+
+``error_log_file``
+
+:Description: Path to a file for error logs. Either full path, or relative
+			  to the current working directory. If absent (default), then
+			  errors are not logged.
+
+:Type: String
+:Default: ``EMPTY``
+
+
+The following is an example of the ``/etc/ceph/ceph.conf`` file with some of these options set: ::
+ 
+ [client.rgw.gateway-node1]
+ rgw_frontends = civetweb request_timeout_ms=30000 error_log_file=/var/log/radosgw/civetweb.error.log access_log_file=/var/log/radosgw/civetweb.access.log
+
+A complete list of supported options can be found in the `Civetweb User Manual`_.
+
+
+Generic Options
+===============
+
+Some frontend options are generic and supported by all frontends:
+
+``prefix``
+
+:Description: A prefix string that is inserted into the URI of all
+              requests. For example, a swift-only frontend could supply
+              a uri prefix of ``/swift``.
+
+:Type: String
+:Default: None
+
+
+.. _Civetweb User Manual: https://civetweb.github.io/civetweb/UserManual.html
+.. _Config Reference: ../config-ref