Ansible condition when string not matching

Question

I am trying to write an Ansible playbook that only compiles Nginx if it\'s not already present and at the current version. However it compiles every time which is undesirable.

Answer 1

Since var is a json string you can parse it to json and access it's keys.

set_fact:
  var_json: "{{ var.stdout|from_json }}"

Then access the json and get the value you want.

when: var_json.nginxVersion.stdout == 'nginx version: nginx/1.8.0'

checkout this link: https://gist.github.com/justinhennessy/28e82c2ec05f9081786a

Answer 2

Try:

when: nginxVersion.stdout != 'nginx version: nginx/1.8.0'

or

when: '"nginx version: nginx/1.8.0" not in nginxVersion.stdout'