Updating Ansible hosts inventory dynamically

[Subhi Andrews]

We have our hosts inventory organized by environments. We tend to have alpha versions of software deployed in our test environment. Are there any thoughts on keeping the inventory dynamically updated if we decide to move a host between environment - say from test to dev or from dev to production etc. Are there any best practices and such around it?

Thank you.

[Kai Stian Olstad]

You have information in the documentation about dynamic inventory
https://docs.ansible.com/ansible/latest/user_guide/intro_dynamic_inventory.html

Some plugins is created
https://docs.ansible.com/ansible/latest/plugins/inventory.html

If non of them suite your need you probably need to create your own.

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Kai Stian Olstad

[Subhi Andrews]

Thank you, Kai. Will check it out.

So if we can write a script that generates inventory in json format, we can directly pass the script to the ansible-playbook command? Did I understand that correctly?

Regards,

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[Kai Stian Olstad]

On 01.02.2019 21:13, Subhi Andrews wrote:
> Thank you, Kai. Will check it out.
>
> So if we can write a script that generates inventory in json format, we
> can
> directly pass the script to the ansible-playbook command? Did I
> understand
> that correctly?

That is correct, if a inventory file doesn't have the execution bit set
Ansible will read the content, if the execution bit is set Ansible will
run the file.

The script need to return json and the format is described here together
with how to develop a plugin
https://docs.ansible.com/ansible/latest/dev_guide/developing_inventory.html

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Kai Stian Olstad