CODEWITHSUNDEEP
ansibleyamljinja2
Gregory Danenberg
Gregory Danenberg

Reputation: 529

Validate yaml path in Ansible Jinja2 template

I have Cloudformation template in yaml format. The template is rendered by Ansible Jinja2.

I need to find a way to add validation of some elements inside the template. Something like this ("if" statement is a pseudo code of what I want to get):

Parameters:
  EnvironmentType:
    Default: {{profile}}

    Mappings:
        Environments:
            dev:
                DbSnapshotArn: ""
            test:
                DbSnapshotArn: "AAA"

           Type: AWS::RDS::DBInstance
            Properties:
             {% if Mappings.Environments.{{profile}}.DbInstanceClass %}
                    DBSnapshotIdentifier: !FindInMap [Environments, !Ref 'EnvironmentType', DbSnapshotArn]
            {% endif %}

Is it possible?

Upvotes: 0

Views: 708

Answers (1)

Behrang Saeedzadeh
Behrang Saeedzadeh

Reputation: 47913

Not if Mappings.Environments.{{profile}}.DbInstanceClass references something inside the template.

But if you define a variable like this:

Mappings:
  Environments:
    Dev:
      DbInstanceClass: "..."

And another variable that contains the value of profile, then inside your template you can create an if statement like this:

{% if Mappings.Environments[profile].DbInstanceClass is defined %}
...
{% endif %}

See also:

Upvotes: 1

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