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Geo
Asked: 2020-05-25 08:27:25 +0800 CST

Ansible Join two variables

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I have two variable definition files as follows

vars.yml

aws_common_tags:
    Project: "{{ project_name }}"
    Application: "{{ application_name }}"
        Region: "{{ aws_region }}"
        Ansible: "Yes"

instance.yml

ec2_instance_tags:
    environment_name: dev

Now in task.yml I am trying to create aws ec2 instance with all tags but its not working.

ec2:
    key_name: "{{ keypair_name }}"
    instance_type: "{{ ec2_instance_type }}"
    instance_tags: "{{ aws_common_tags + ec2_instance_tags }}"

We are getting the following error:

"tags": {
        "Ansible": "Yes",
        "Application": "webserver",
        "Project": "document_upload",
        "Region": "us-west-2"
    },

fatal: [localhost]: FAILED! => {
    "msg": "Unexpected templating type error occurred on ({{ aws_common_tags + ec2_instance_tags }}): unsupported operand type(s) for +: 'dict' and 'dict'" }

Thanks

amazon-web-services ansible boto3

1 Answers

  1. Best Answer

    It's possible combine dictionaries. For example

    ec2:
    key_name: "{{ keypair_name }}"
    instance_type: "{{ ec2_instance_type }}"
    instance_tags: "{{ aws_common_tags|combine(ec2_instance_tags) }}"

    The concatenation "+" would work with lists or strings that are treated as lists.

    • 2