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.. _datasource_cloudstack:
CloudStack
**********
`Apache CloudStack`_ exposes user data, metadata, user password, and account
SSH key through the ``virtual router``. The datasource obtains the ``virtual
router`` address via DHCP lease information given to the instance.
For more details on metadata and user data, refer to the
`CloudStack Administrator Guide`_.
The following URLs provide to access user data and metadata from the Virtual
Machine. ``data-server.`` is a well-known hostname provided by the CloudStack
``virtual router`` that points to the next ``UserData`` server (which is
usually also the ``virtual router``).
.. code-block:: bash
http://data-server./latest/user-data
http://data-server./latest/meta-data
http://data-server./latest/meta-data/{metadata type}
If ``data-server.`` cannot be resolved, ``cloud-init`` will try to obtain the
``virtual router``'s address from the system's DHCP leases. If that fails,
it will use the system's default gateway.
Configuration
=============
The following configuration can be set for the datasource in system
configuration (in :file:`/etc/cloud/cloud.cfg` or
:file:`/etc/cloud/cloud.cfg.d/`).
The settings that may be configured are:
* :command:`max_wait`
The maximum amount of clock time in seconds that should be spent searching
``metadata_urls``. A value less than zero will result in only one request
being made, to the first in the list.
Default: 120
* :command:`timeout`
The timeout value provided to ``urlopen`` for each individual http request.
This is used both when selecting a ``metadata_url`` and when crawling
the metadata service.
Default: 50
Example
-------
An example configuration with the default values is provided below:
.. code-block:: yaml
datasource:
CloudStack:
max_wait: 120
timeout: 50
.. _Apache CloudStack: http://cloudstack.apache.org/
.. _CloudStack Administrator Guide: http://docs.cloudstack.apache.org/projects/cloudstack-administration/en/latest/virtual_machines.html#user-data-and-meta-data
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