I am currently getting familiar with salt and wonder how I could re-use the values of pillars in other places (sections) in .sls files.
In buildout, I would be able to reference a variable from another section with ${sectionname:varname} to re-use a once defined value. This is especially handy, when dealing with directories (basedir, appdir). buildout example:
['foo']
path = /highway/to/hell
['bar']
path = ${foo:path}/lastexit
When I try to reference another variable in an .sls file, even if it is in the same file, I get always None. salt example:
foo:
path: /highway/to/hell
bar:
path: {{ salt['pillar.get']('foo:path') }}/lastexit
salt-ssh minion1 pillar.get bar:path results in None/lastexit
I have the feeling, that I'm missing something here. Could someone point out, how one does re-use values in salt .sls
You can use jinja to assign a value, e.g.:
{% set base_path = salt['pillar.get']('foo:path','/highway/to/hell') %}
foo:
path: {{ base_path }}
bar:
path: {{ base_path }}/lastexit
In this case "/highway/to/hell" is set as a default in case no value is assigned in the pillar or no pillar is found. For more info, see https://docs.saltstack.com/en/latest/topics/jinja/index.html
Related
Currently I am calling macros in such a way:
"post_hook":["{{macros_append('string1','string2')}}"]})}}
I want to call it as
"post_hook":["{{macros_append(var1,var2)}}"]})}}
I have already tried setting variable before config like
{% set var1='value' %}
"post_hook":["{{macros_append(var1,var2)}}"]})}}
But this does not work. It does not take any value while calling macros.
This doesn't work because dbt is parsing the jinja of your post-hook in a different context from the model file. In short, the post-hook needs to stand on its own.
This is true of all configs. The hints are:
post_hook takes a list of strings. Those strings later get templated by the jinja templater. (this is why you quote them and nest the curlies! you should never really nest curlies otherwise)
Configs can also get passed in through .yml files, etc., which is partially why the templating is deferred
Your question omits the actual call to the config macro, which makes this a little more clear:
{{
config({
"post_hook": ["{{macros_append('string1','string2')}}"]
})
}}
So what are we to do? You could use jinja to build the string that gets passed into the config block. This is hacky and ugly, but it works:
(Note that ~ is the jinja string concatenation operator.)
{% set var1 = "string1" %}
{% set var2 = "string2" %}
{{
config({
"post_hook": ["{{ macros_append(" ~ var1 ~ "," ~ var2 ~ ") }}"]
})
}}
A slightly cleaner version of this would be to define the whole macro call in a variable, so you don't have to do the concatenation:
{% set my_hook = "{{ macros_append('string1', 'string2') }}" %}
{{
config({
"post_hook": [my_hook]
})
}}
A Better Way
Another option is to use the var() macro, which allows you to access a global variable in the jinja context. You define these global variables in your dbt_project.yml file:
...
vars:
var1: string1
var2: string2
and then you can access them with {{ var('var1') }} from any process that is templating jinja. In the case of your config block, that would look like:
{{
config({
"post_hook": ["{{ macros_append(var('var1'), var('var2')) }}"]
})
}}
Note that the post-hook here is just a string that contains the string "var('var1')", but that's fine, since the templater will fill that in later, when the string is templated.
trying to get Grains value in Jinja template but i dont know how to get it to work..
i'm traing to get fqdn and manually added grain (appfqdn)
here is the jinja
{%- set SERVERNAME = grains['fqdn'] -%}
{%- set APPTIER = grains['appfqdn'] -%}
the result of first line work very well. i get the fqdn of the server.
2nd one doesn't. i got it like this: [u'client02.lab.home']
as you can see there is u and ' and []
not sure how to grab it correctly.
also when i grab the value on salt master manfully with json format output. this is hop i get it.
salt 'client03.lab.home' grains.item fqdn --out json
{
"client03.lab.home": {
"fqdn": "client03.lab.home"
}
}
salt 'client03.lab.home' grains.item appfqdn --out json
{
"client03.lab.home": {
"appfqdn": [
"client02.lab.home"
]
}
}
not sure how to use jinja to get the value correctly without the single quot, the u and brackets..
Thank you
I found the the solution.
{%- set APPTIER = grains['appfqdn'][0] -%}
was able to to get the right result.
Is there a way in Jinja2 to construct a variable name and then call it? I want to do something like this:
{% for type in ('Students', 'Faculty', 'Groups') %}
{% set import_name = 'latest_' + type|lower + '_import' %}
{{ type }}: {{ import_name.created_at }}
{% endfor %}
I would expect the output to be something like this:
Students: 5/26/2016
Faculty: 5/25/2016
Groups: 5/25/2016
I have the variables latest_students_import, latest_faculty_import, and latest_groups_import set in the template scope, and would like to avoid having a large conditional in my for loop. I set import_name based on the type, and then try to "call" import_name. I want something like {{ call(import_name) }}. Is this possible, or is there another way I can go about this?
In this case, I suppose I could do it in reverse order loop through the three template variable names, and then "print" the shortened name, capitalized, but I would prefer to do it this way.
One possibility is to create a dict or a list on the server-side which contains your variables. You can then send that object to Jinja as a template variable. As it stands you are just setting import_name equal to string, which won't have the .created_at attribute.
My variable is as such:
api-20150901r1_6.38
Using Jinja, I need a way to grab the string BEFORE the hyphen. There will always be one hyphen so I dont need to worry about multiple instances.
Assuming input_string is api-20150901r1_6.38
You can use set
{% set mylist = input_string.split('-') %}
This is your value "api" in this case
{{ mylist[0] }}
I'm using Google app engine and I'm trying to set the value of a textarea based on the concatenation of two string variables. Let's say I have 4 items, and each item has multiple fields. So in my Python I'm passing the dictionary { 'value0': newValue }. I'm using a for loop (iterator value num) and I want to use in my HTML something equivalent to {{ value }}{{ num }} where the variable referenced is value0.
I've tried {{ value~num }} but nothing works. If I could use an array that would be even better - such as {{ value[num] }}