openstack-manuals/doc/user-guide/source/cli-provide-user-data-to-instances.rst
Maria Zlatkova b94d0b58d4 [user-guide] Changes underscore to hyphen in RST files
Adds the following changes:

- Renames all the RST files in the user-guide folder to use
  hyphens instead of underscores;
- Adds redirects to the renamed files to .htaccess.

Change-Id: Ic5f1a90421add35d001363cd39bada0b56a04d7f
Implements: blueprint consistency-file-rename
2016-08-10 18:00:13 +03:00

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Provide user data to instances
==============================
A user data file is a special key in the metadata service that holds a
file that cloud-aware applications in the guest instance can access. For
example, one application that uses :term:`user data` is the
`cloud-init <https://help.ubuntu.com/community/CloudInit>`__ system,
which is an open-source package from Ubuntu that is available on various
Linux distributions and which handles early initialization of a cloud
instance.
You can place user data in a local file and pass it through the
``--user-data <user-data-file>`` parameter at instance creation.
.. code-block:: console
$ nova boot --image ubuntu-cloudimage --flavor 1 --user-data mydata.file