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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
:file:`http://100.100.100.200/`. For more information see Alibaba Cloud ECS
on `metadata`_.
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/`).
An example configuration with the default values is provided below:
.. code-block:: yaml
datasource:
AliYun:
metadata_urls: ["http://100.100.100.200"]
timeout: 50
max_wait: 120
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/
Example output:
.. code-block::
2016-01-01
latest
Metadata
--------
Instance metadata can be queried at
:file:`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
Example output:
.. code-block::
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
:file:`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
Example output:
.. code-block::
#!/bin/sh
echo "Hello World."
.. LINKS
.. _metadata: https://www.alibabacloud.com/help/zh/faq-detail/49122.htm
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