I believe the original error holds the answer:
fatal: [127.0.0.1] => One or more undefined variables: 'list object' has no
attribute u'0'
That states that the list object has not attribute of the Unicode string
"0".
So "num" appears to be a string and needs to be an int.
Try using
"{{ nics[num|int].ip }}"
The |int will cast the string to an int.
On Wednesday, August 12, 2015, <[email protected]> wrote:
> Let me paste the output of all files & the invoking call again here:
>
> # ansible-playbook test.yml --extra-vars "num=0"
> [SNIP]
> TASK: [Static IP Case - Find out Static Overlay IP]
> ***************************
> fatal: [127.0.0.1] => One or more undefined variables: 'list object' has
> no attribute u'0'
>
> # cat nics.yml
> ---
> nics:
> - {type: 'static', ip: '10.3.5.4'}
> - {type: 'dhcp'}
> - {type: 'static', ip: '10.3.5.5'}
>
> # cat test.yml
> - hosts: 127.0.0.1
> vars_files:
> - "nics.yml"
> tasks:
>
> # Static IP Case: Find out the Overlay IP
> - name: Static IP Case - Find out Static Overlay IP
> set_fact:
> cvmip: "{{nics[num].ip}}"
> when: nics[{{num}}].type == "static"
>
> - name: Write Overlay IP to file
> shell: echo {{cvmip}} >> /tmp/staticip.txt
> when: nics[{{num}}].type == "static"
>
>
> NOTE:
> If I replace the bad line with a hardcoded "0" as shown here, the play
> succeeds, indicating that nics.yml is correct:
> cvmip: "{{nics[0].ip}}"
>
> # cat /tmp/staticip.txt
> 10.3.5.4
>
>
> Thanks!
> Lilian
>
> On Wednesday, August 12, 2015 at 11:09:34 AM UTC-7, Brian Coca wrote:
>>
>> when are you setting num?
>>
>> On Wed, Aug 12, 2015 at 2:08 PM, <[email protected]> wrote:
>>
>>> Hi Brian,
>>>
>>> nics.yml is not an empty list - as I pointed out, in the "when:" clause,
>>> the playbook correctly detects it as type static:
>>>
>>> host# cat nics.yml
>>> ---
>>> nics:
>>> - {type: 'static', ip: '10.3.5.4'}
>>> - {type: 'dhcp'}
>>> - {type: 'static', ip: '10.3.5.5'}
>>>
>>> The first example is exactly where I am stuck - it should work, but
>>> doesn't...
>>> cvmip: "{{nics[num].ip}}"
>>>
>>> Thanks,
>>> Lillian
>>>
>>> On Wednesday, August 12, 2015 at 10:09:51 AM UTC-7, Brian Coca wrote:
>>>>
>>>> sounds like nics is an empty list, your first example is correct
>>>> syntax, the rest are not.
>>>>
>>>> On Wed, Aug 12, 2015 at 12:27 PM, <[email protected]> wrote:
>>>>
>>>>> Hi Guys,
>>>>>
>>>>> Thank you for the responses. I should have mentioned this - I had
>>>>> already tried several combinations (including the suggestion above) with
>>>>> and without nested {{ }}, but still can't get a working syntax. Please see
>>>>> below for some attempts and their results.
>>>>>
>>>>> Putting an example/note in the docs would be really helpful as well.
>>>>>
>>>>> Thanks,
>>>>> Lilian
>>>>>
>>>>> host# ansible-playbook test.yml --extra-vars "num=0"
>>>>>
>>>>> Format Attempt:
>>>>> cvmip: "{{nics[num].ip}}"
>>>>> Result:
>>>>> TASK: [Static IP Case - Find out Static Overlay IP]
>>>>> ***************************
>>>>> fatal: [127.0.0.1] => One or more undefined variables: 'list object'
>>>>> has no attribute u'0'
>>>>>
>>>>> Format Attempt:
>>>>> cvmip: "{{nics['num'].ip}}"
>>>>> Result:
>>>>> TASK: [Static IP Case - Find out Static Overlay IP]
>>>>> ***************************
>>>>> fatal: [127.0.0.1] => One or more undefined variables: 'list object'
>>>>> has no attribute 'num'
>>>>>
>>>>> Format Attempt:
>>>>> cvmip: "{{nics}}"["{{num}}"].ip}}
>>>>> Result:
>>>>> ERROR: Syntax Error while loading YAML script, test.yml
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Tuesday, August 11, 2015 at 6:35:06 PM UTC-7, Timothy Appnel wrote:
>>>>>>
>>>>>> That is a good way of thinking of explaining it in the context of
>>>>>> Ansible -- start Jinja, stop Jinja. At the same time, how would you have
>>>>>> represented this in a Jinja template? Jinja doesn't allow for nested
>>>>>> mustaches in any context that I am aware of.
>>>>>>
>>>>>> I'm sure a patch to the docs to make light of this would be
>>>>>> appreciated.
>>>>>>
>>>>>>
>>>>>>
>>>>>> [image: photo]
>>>>>> Timothy Appnel
>>>>>> Senior Solutions Architect
>>>>>>
>>>>>> Ansible, Inc. *•* www.ansible.com
>>>>>>
>>>>>> On Tue, Aug 11, 2015 at 8:38 PM, Josh Smift <[email protected]> wrote:
>>>>>>
>>>>>>> TA> Don't use nested mustaches.
>>>>>>>
>>>>>>> This should probably be a FAQ. :^) FWIW, what helped me understand
>>>>>>> this is
>>>>>>> that the mustaches aren't saying "here's a variable" (in which case
>>>>>>> you
>>>>>>> might think, incorrectly, that you need to put them around all
>>>>>>> variables
>>>>>>> all the time everywhere), but rather "start parsing this as Jinja",
>>>>>>> and
>>>>>>> that once you say that, it keeps happening until you close the
>>>>>>> mustaches
>>>>>>> (which means "stop parsing this as Jinja"). One of the things that
>>>>>>> happens
>>>>>>> when you're parsing as Jinja is that variables get expanded, but
>>>>>>> thinking
>>>>>>> of it as "start Jinja" and "stop Jinja" helped me keep it straight
>>>>>>> when I
>>>>>>> first started with this stuff, anyway.
>>>>>>>
>>>>>>> -Josh ([email protected])
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>> --
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>>>>
>>>>
>>>>
>>>> --
>>>> Brian Coca
>>>>
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>>>
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>>>
>>
>>
>>
>> --
>> Brian Coca
>>
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--
Matt Martz
@sivel
sivel.net
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