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.. _datasource_aliyun:
Alibaba Cloud (AliYun)
======================
The ``AliYun`` datasource reads data from Alibaba Cloud ECS. Support is
present in cloud-init since 0.7.9.
Metadata Service
----------------
The Alibaba Cloud metadata service is available at the well known url
``http://100.100.100.200/``. For more information see
Alibaba Cloud ECS on `metadata
<https://www.alibabacloud.com/help/zh/faq-detail/49122.htm>`__.
Versions
^^^^^^^^
Like the EC2 metadata service, Alibaba Cloud's metadata service provides
versioned data under specific paths. As of April 2018, there are only
``2016-01-01`` and ``latest`` versions.
It is expected that the dated version will maintain a stable interface but
``latest`` may change content at a future date.
Cloud-init uses the ``2016-01-01`` version.
You can list the versions available to your instance with:
.. code-block:: shell-session
$ curl http://100.100.100.200/
2016-01-01
latest
Metadata
^^^^^^^^
Instance metadata can be queried at
``http://100.100.100.200/2016-01-01/meta-data``
.. code-block:: shell-session
$ curl http://100.100.100.200/2016-01-01/meta-data
dns-conf/
eipv4
hostname
image-id
instance-id
instance/
mac
network-type
network/
ntp-conf/
owner-account-id
private-ipv4
public-keys/
region-id
serial-number
source-address
sub-private-ipv4-list
vpc-cidr-block
vpc-id
Userdata
^^^^^^^^
If provided, user-data will appear at
``http://100.100.100.200/2016-01-01/user-data``.
If no user-data is provided, this will return a 404.
.. code-block:: shell-session
$ curl http://100.100.100.200/2016-01-01/user-data
#!/bin/sh
echo "Hello World."
.. vi: textwidth=78
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