[ansible-project] For 2.0 How to test if variable set to null in when clause
pre 2.0
set_fact:
uberHost: "{{ ansible_ssh_host }}"
when: ansible_ssh_host is defined
set fact:
uberHost: "{{ inventory_hostname }}"
when: ansible_ssh_host is not defined
Post 2.0, changed to use ansible_host
uberHost is always getting set to null
ansible_host is defined and set to null even when it's not present in the
inventory file
I haven't figured out how to test to see if ansible_host is null in a when
clause.
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Re: [ansible-project] For 2.0 How to test if variable set to null in when clause
It should be enough to just check:
when: ansible_ssh_host
However it may be good to come at it from a little different direction and
use something like:
set_fact:
uberHost: "{{ ansible_ssh_host|default(inventory_hostname, True) }}"
The True in default() will tell jinja2 to use pythons truthyness checks, so
an empty string evaluates as false as well.
On Tuesday, January 19, 2016, Michael Baydoun
wrote:
> pre 2.0
>
> set_fact:
> uberHost: "{{ ansible_ssh_host }}"
> when: ansible_ssh_host is defined
>
> set fact:
> uberHost: "{{ inventory_hostname }}"
> when: ansible_ssh_host is not defined
>
>
> Post 2.0, changed to use ansible_host
> uberHost is always getting set to null
> ansible_host is defined and set to null even when it's not present in the
> inventory file
> I haven't figured out how to test to see if ansible_host is null in a when
> clause.
>
>
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Matt Martz
@sivel
sivel.net
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Re: [ansible-project] For 2.0 How to test if variable set to null in when clause
you can even chain them and make it future proof
set_fact:
uberHost: "{{
ansible_host|default(ansible_ssh_host|default(inventory_hostname,
True), True) }}"
On Tue, Jan 19, 2016 at 9:56 AM, Matt Martz wrote:
> It should be enough to just check:
>
> when: ansible_ssh_host
>
> However it may be good to come at it from a little different direction and
> use something like:
>
> set_fact:
> uberHost: "{{ ansible_ssh_host|default(inventory_hostname, True) }}"
>
> The True in default() will tell jinja2 to use pythons truthyness checks, so
> an empty string evaluates as false as well.
>
>
> On Tuesday, January 19, 2016, Michael Baydoun
> wrote:
>>
>> pre 2.0
>>
>> set_fact:
>> uberHost: "{{ ansible_ssh_host }}"
>> when: ansible_ssh_host is defined
>>
>> set fact:
>> uberHost: "{{ inventory_hostname }}"
>> when: ansible_ssh_host is not defined
>>
>>
>> Post 2.0, changed to use ansible_host
>> uberHost is always getting set to null
>> ansible_host is defined and set to null even when it's not present in the
>> inventory file
>> I haven't figured out how to test to see if ansible_host is null in a when
>> clause.
>>
>>
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>> "Ansible Project" group.
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>> email to ansible-project+unsubscr...@googlegroups.com.
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>> For more options, visit https://groups.google.com/d/optout.
>
>
>
> --
> Matt Martz
> @sivel
> sivel.net
>
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Brian Coca
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