Limit and selection of group with dynamic inventory

[Mehul Ved]

Hello,

  I have a setup in google cloud which has been working very well with Ansible. Till last week, we had only one "environment" per machine. Each environment was marked by a network tag which ansible would pick up while using limit. This worked beautifully.
Now, we are trying to consolidate some machines, ones that have our database. Thus, we have 2 environments together e.g. tag_dev and tag_test on one machine.

This has caused a bug where one of my play fails because ansible always picks a particular tag.

$ cat inventory/group_vars/tag_dev

---

environment_tag: "tag_dev"

$ cat inventory/group_vars/tag_test

---

environment_tag: "tag_test"

$ cat db.yml

---

  - hosts: "tag_db"

    user: admin

    roles:

      - {role: db, tag: db}

$ cat roles/db/tasks/main.yml

---

  - debug:

      var: "environment_tag"

  - name: Ensure nginx location is updated

    template:

      src: "nginx/location.conf.j2"

      dest: "/etc/nginx/locations/monit-{{ ansible_hostname }}.conf"

    delegate_to: "{{ hostvars[(groups['tag_web'] | intersect(groups[environment_tag]))[0]]['internal_ip_address'] }}"

 

Now, when I run the playbook, I limit them by environment.

$ ansible-playbook -i inventory/gce.py db.yml --limit tag_dev

or

$ ansible-playbook -i inventory/gce.py db.yml --limit tag_test

earlier it would pick up environment_tag correctly, but not it picks tag_test with either of the limit applied. Is there a way I can use the tag from applied limit inside the play without having to pass an additional parameter?

--

With Regards,
Mehul Ved