pass ec2 tag to a task conditional

[Paul Stivers]

Is there a way to pass the value of an ec2 tag to a conditional in an ansible task? Boto is installed and used to determine which tagged ec2 servers the playbook is run against.

 

For example:

 

ec2 server with tag name "Application" and value "my_app"

 

ansible command to run a playbook

 

 

$ AWS_PROFILE=paul-dev ansible-playbook playbooks/paul_test.yml -i inventories/ec2.py -l 'tag_Environment_dev:&tag_Application_my_app' -e "app=my_app" -u ubuntu -s

 

works for the simple playbook containing this task because of the extra variable "app=my_app" on the commandline.

 

---

 

  - hosts: all

 

    tasks:

      - name: tree package is present

        apt: name=tree state=present

        when: app  == 'my_app'

 

If I want to avoid including an extra variable on the command line, is there a way to access the ec2 tag name and value in a task conditional? The tag name and value are referenced in the command to run the playbook, "&tag_Application_my_app", but I haven't found a way to reference it in a task.

 

I get the following error when running the playbook with the following attempts at conditionals on the ec2 tag

 

---

 

  - hosts: all

 

    tasks:

      - name: tree package is present

        apt: name=tree state=present

        when: tag_Application == 'my_app'

        # when: Application = 'my_app'

        # when: tag_Application_my_app

 

fatal: [10.5.81.130] => ERROR! error while evaluating conditional: tag_Application_cis_acord_1203

 

[Stephen Granger]

http://docs.ansible.com/ansible/ec2_tag_module.html

You will need to "list" the tags first of the instance to see what tags are set.

Something like

when: ec2_tags.tags.Application == 'my_app'

should give you what you want.

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Steve

[Paul Stivers]

Good clue, Steve. Thanks.

Got me thinking, I'm using the EC2 external inventory script, so from the variable list here http://docs.ansible.com/ansible/intro_dynamic_inventory.html#example-aws-ec2-external-inventory-script

This worked

when: ec2_tag_Application == 'my_app'

On Tuesday, April 12, 2016 at 2:58:39 PM UTC-7, Stephen Granger wrote:

http://docs.ansible.com/ansible/ec2_tag_module.html

You will need to "list" the tags first of the instance to see what tags are set.

Something like

when: ec2_tags.tags.Application == 'my_app'

should give you what you want.

--

Steve