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+.. _datasource_cloudsigma:
+
+CloudSigma
+**********
+
+This datasource finds metadata and user data from the `CloudSigma`_ cloud
+platform. Data transfer occurs through a virtual serial port of the
+`CloudSigma`_'s VM, and the presence of a network adapter is **NOT** a
+requirement. See `server context`_ in their public documentation for more
+information.
+
+Setting a hostname
+==================
+
+By default, the name of the server will be applied as a hostname on the first
+boot.
+
+Providing user data
+-------------------
+
+You can provide user data to the VM using the dedicated `meta field`_ in the
+`server context`_ ``cloudinit-user-data``. By default, *cloud-config* format
+is expected there, and the ``#cloud-config`` header can be omitted. However,
+since this is a raw-text field you could provide any of the valid `config
+formats`_.
+
+You have the option to encode your user data using Base64. In order to do that
+you have to add the ``cloudinit-user-data`` field to the ``base64_fields``.
+The latter is a comma-separated field with all the meta fields having
+Base64-encoded values.
+
+If your user data does not need an internet connection you can create a
+`meta field`_ in the `server context`_ ``cloudinit-dsmode`` and set "local" as
+the value. If this field does not exist, the default value is "net".
+
+.. _CloudSigma: http://cloudsigma.com/
+.. _server context: http://cloudsigma-docs.readthedocs.org/en/latest/server_context.html
+.. _meta field: http://cloudsigma-docs.readthedocs.org/en/latest/meta.html
+.. _config formats: http://cloudinit.readthedocs.org/en/latest/topics/format.html