How to use --extra-vars option to pass host variables in ansible-playbook

[DINESH S]

We have an requirement to pass the host variables defined in a file under host_vars directory as an argument to the ansible playbook. So we have planned to use --extra-vars option to pass additional variables as key value pair. But we couldn't able to pass the host variables as argument and I couldn't find any proper documentation for this use case.

Could anyone give me a solution for this problem.

[Brian Coca]

host_vars do not need to be passed, they are picked up automatically, you would be 'double passing them' by adding them to the command line.

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Brian Coca

[DINESH S]

Thanks Brain for your reply.

We are not planning to have the yaml or json file under host_vars directory. Instead we are passing as arguments in the command line.

Could you please share me some examples or documentation to pass host variables.

[Alex Leonhardt]

Then don't they just become normal variables that you'd use in your playbooks?

Alex

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[Dinesh Sekar]

Yes. If I give the arguments as below, then it would be normal variables or global variables.

 ansible-playbook -i hosts xxxx.yaml --extra-vars '{"management_interface":{"int": "em0","ip": "192.168.56.3"}}'

But I'm looking for an option in ansible-playbook where we could pass the host variables specific to the particular host as follows.

 ansible-playbook -i hosts xxxx.yaml --extra-vars '{"hostvars['host1']":{"management_interface":{"int": "em0","ip": "192.168.56.3"}}}'

The content in hosts file is as below:

[vdc1-host1]
host1

[vdc1-host2]
host2

[vdc1:children]
vdc1-host1
vdc1-host2

[sites:children]
vdc1

[all:children]
sites

Please let me know if you have any queries.

On Monday, February 29, 2016 at 12:37:57 PM UTC+5:30, Alex Leonhardt wrote:

Then don't they just become normal variables that you'd use in your playbooks?

Alex

On Monday, 29 February 2016, DINESH S <msdin...@gmail.com> wrote:

Thanks Brain for your reply.

We are not planning to have the yaml or json file under host_vars directory. Instead we are passing as arguments in the command line.

Could you please share me some examples or documentation to pass host variables.

On Friday, February 26, 2016 at 12:32:10 AM UTC+5:30, Brian Coca wrote:

host_vars do not need to be passed, they are picked up automatically, you would be 'double passing them' by adding them to the command line.

----------

Brian Coca

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[Tom Bamford]

On 29 Feb 2016, at 9:41 AM, Dinesh Sekar <msdin...@gmail.com> wrote:
>
> Yes. If I give the arguments as below, then it would be normal variables or global variables.
>
> ansible-playbook -i hosts xxxx.yaml --extra-vars '{"management_interface":{"int": "em0","ip": "192.168.56.3"}}'
>
> But I'm looking for an option in ansible-playbook where we could pass the host variables specific to the particular host as follows.
>
> ansible-playbook -i hosts xxxx.yaml --extra-vars '{"hostvars['host1']":{"management_interface":{"int": "em0","ip": "192.168.56.3"}}}'
>
> The content in hosts file is as below:
>
> [vdc1-host1]
> host1
>
> [vdc1-host2]
> host2
>
> [vdc1:children]
> vdc1-host1
> vdc1-host2
>
> [sites:children]
> vdc1
>
> [all:children]
> sites
>
> Please let me know if you have any queries.

Have you considered other ways of specifying that information, such as a dynamic inventory script, or a custom facts module?

Tom

[Dinesh Sekar]

No. I don't have idea in specifying it as dynamic inventory script or custom facts module.

Could you please provide me an examples or documentation.