If condition in ansible jinja2 template

[Pandu jh]

Search keyword in "host_fqdn" variable. If the value has "lab.com" keyword in it, it should directly store the value to "host_fqdn" again

or else it should add "lab.com" keyword to the value and store it to  "host_fqdn" variable. Please assist.

vars:

    host_fqdn:  server

    host_fqdn: |

    {%  if  'lab.com' in {{  host_fqdn }} %}

        {%  host_fqdn = "{{ host_fqdn }}" %}

    {% else %}

        {%  host_fqdn = "{{ host_fqdn }}.lab.com" %}

    {%  endif %}

[Kai Stian Olstad]

I'm pretty sure you can't use Jinja in vars like that, but you can have
a set_fact task like this

- set_fact:
host_fqdn: "{{ host_fqdn if 'lab.com' in host_fqdn else host_fqdn
~ '.lab.com' }}"

--
Kai Stian Olstad

[Pandu jh]

Can you please confirm, if the below syntax is correct. I am getting error.

    vars_prompt:

      - name: host_fqdn

        prompt: Enter Hostname of a new VM

        private:  no

    tasks:

      - set_fact:

          host_fqdn:  "{{ host_fqdn if 'lab.com' in host_fqdn else host_fqdn '.lab.com' }}"

      - debug:  var=host_fqdn

[Kai Stian Olstad]

On 19.02.2019 16:49, Pandu jh wrote:
> Can you please confirm, if the below syntax is correct. I am getting
> error.
>
> vars_prompt:
> - name: host_fqdn
> prompt: Enter Hostname of a new VM
> private: no
> tasks:
> - set_fact:
> host_fqdn: "{{ host_fqdn if 'lab.com' in host_fqdn else
> host_fqdn '.lab.com' }}"
> - debug: var=host_fqdn

What is the error then? We are not psychic.

--
Kai Stian Olstad

[Pandu jh]

This was the error.

TASK [set_fact] ****************************************************************************************************************************************

fatal: [rchtest01]: FAILED! => {"msg": "template error while templating string: expected token 'end of print statement', got 'string'. String: {{ host_fqdn if 'lab.com' in host_fqdn else host_fqdn  '.lab.com' }}"}

[Kai Stian Olstad]

On 19.02.2019 16:57, Pandu jh wrote:
> This was the error.
>
> TASK [set_fact]
> ****************************************************************************************************************************************
> fatal: [rchtest01]: FAILED! => {"msg": "template error while templating
> string: expected token 'end of print statement', got 'string'. String:
> {{
> host_fqdn if 'lab.com' in host_fqdn else host_fqdn '.lab.com' }}"}

You are missing the tilde ~ in you syntax, check my previous mail and
you'll see the tilde.

--
Kai Stian Olstad

[Pandu jh]

Sorry my bad, it missed it. it's working perfectly now, Thanks much !!

TASK [debug] *******************************************************************************************************************************************

ok: [rchtest01] => {

    "host_fqdn": "rchtest01.lab.com"

}

[Pandu jh]

If possible could you please explain the syntax, It will be very helpful for me to use it in other cases.

[Kai Stian Olstad]

On 19.02.2019 17:07, Pandu jh wrote:
> If possible could you please explain the syntax, It will be very
> helpful
> for me to use it in other cases.

I could try, not sure if it's understandable

Just split it in multiple lines

[1] {{ host_fqdn
[2] if 'lab.com' in host_fqdn
[3] else
[4] host_fqdn ~ '.lab.com' }}

[2]
If the variable host_fqdn contains the string lab.com the choose [1].

[3]
If the variable host_fqdn dosen't contains the string lab.com the choose
[4]

[4]
Tilde is used to concatenate two strings.
So this will concatenate the content of variable fqdn_host with the
string .lab.com


You can also use the Ansible ternary filter

{{ ('lab.com' in host_fqdn) | ternary(host_fqdn, host_fqdn ~ '.lab.com')
}}


--
Kai Stian Olstad

[Pandu jh]

Thank you so much for the explanation.