[salt-users] Jinja Debugging?

Hey Peeps.

I'm at wits-end with trying to figure out an issue I have with Jinja
inside some Pillar configuration.

Here's the output error:

[CRITICAL] Rendering SLS 'base:accumulo' failed: Jinja variable No first
item, sequence was empty.
local:
- Rendering SLS 'base:accumulo' failed: Jinja variable No first item,
sequence was empty.

And here's the code that I believe is cause this error - at least it is
the only place that is using 'first()'.

{% if (salt['mine.get']('roles:accumulo_master', 'network.interfaces',
'grain').keys()|first() is none) %}
{%- set accumulo_master = salt['mine.get']('roles:accumulo_master',
'network.interfaces', 'grain').keys()|first() %}
{%- endif %}
{%- set accumulo_master = gc.get('accumulo_master',
pc.get('accumulo_master', 'localhost' )) %}

I've tried a handful of different ways to get this to work, none
successful. The 'first()' always seems to fail. The reason I'm trying to
handle the 'mine.get' is because I want to be able to support this formula
in a 'masterless' environment, where different nodes are all the same
machine. I'm stuck and am too naive about Salt to figure out what to do or
try next. Any help would be greatly appreciated.

TIA.
Kit

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On Tuesday, June 30, 2015 at 7:32:49 AM UTC-7, Nicholas Capo wrote:

Is this psudo code version correct?

If grain.first() is none:
Set x = grain.first()

I think it might be the second call to first() that's failing since the
dict is empty.

If it helps:

Jinja is /almost/ python (at least close enough). In python an empty list
or empty dict is falsey ([] == False == {}).

So I think you can just do:

{% if not (salt['mine.get']('roles:accumulo_master',
'network.interfaces', 'grain') %}

To test for an empty dict.

But I'm not sure that's what you wanted.

Nicholas

On Tue, Jun 30, 2015, 09:13 Kit Plummer wrote:

--

I'd actually pasted an in between version of my debugging mess. I'm
actually trying to determine if the dict is not empty, then the 'set'...so
I can override the mine.get with a Grain or Pillar config in that case.

So:

if grain.first() is _not_ none:
set x = grain.first()
else
set x = 'blah'

But, I believe what is happening is the evaluation of grain.first()
fails. Still poking.

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On Tuesday, June 30, 2015 at 8:18:07 AM UTC-7, Nicholas Capo wrote:


Yeah. Cool.

So you can avoid the initial call to first() by doing this:

If grain:
Set x = grain.keys().first()
Else:
Set x = blah

On Tuesday, June 30, 2015 at 10:13:45 AM UTC-4, Kit Plummer wrote:

I'm at wits-end with trying to figure out an issue I have with Jinja
inside some Pillar configuration.

I've tried a handful of different ways to get this to work, none
successful. The 'first()' always seems to fail. The reason I'm trying to
handle the 'mine.get' is because I want to be able to support this formula
in a 'masterless' environment, where different nodes are all the same
machine.