Defining variables and save them as json file.

[Marcin Prączko]

Hi,

I struggle with some issue with variables definition which I am not totally understand and can't find help in ansible docs.

I am trying to have nice variables structure and save it as json file (re-use as local facts).

So I have groups_vars file:

g_core_vars:
  version : "0.1.0"
  varinfo:
    vi_name    : "core_vars"
    vi_vartype : "groupvars-all"
  vars:
    status : "non-prod"
    env    : "develop"
    lob    : "none"
    product: "none"
    prole  : "other"
    roles:
      - web

Now I would like to create variable based on above values:
For example:

g_core_nagios_filename: '{{ g_core_vars.vars.env }}-{{ g_core_vars.vars.product }}'.cfg

However I am gettig error on ansible:
ERROR: One or more undefined variables: 'dict object' has no attribute: 'vars'.

My goal is no that I can write this variabe 'g_core_vars' to json with 'copy' module:

- name: Write g_core_vars variables to local facts
  copy: content="{{ g_core_vars }}" dest=/etc/ansible/facts.d/{{ g_core_vars.varinfo.vi_name }}.fact
        owner=root group=root mode=0644

Summary:
- How I can use defined variables which used previous variables names and can be saved as json in one task?
- Not quite undertand this principle that I have to define each variable sepearatly.

# Variables files.
var01: 'value01'
var02: 'value02'

somevars1:
  v01: '{{ var01 }}'
  v02: '{{ var02 }}'

# Will work
somevars2: '{{ var01 }}-{{ var02 }}'

# Will not work
somevars2: '{{ somevars1.var01 }}'

Please advice.

Best regards.
Marcin

[Michael DeHaan]

If you have variables defined centrally, use them via vars_files, group_vars, or whatever, and you don't need to copy them to local facts *at all*.

Local facts are there for when an administrator wants to make the mortals who use a system be able to configure it basically.

(Or it's a shortcut to avoid writing a fact module, in some cases, though fact modules are better-er)

So ultimately I want to step back and understand the use case a bit rather than working through your questions above - though they aren't bad questions, I think we'd be leading you a bit astray - maybe.

I could be wrong.

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