This assumes you have installed Ansible, are familiar with the ansible-playbook command and have created a playbook.

In your playbook.yml file, the "script" option can be used to invoke a script. In this example, script.sh must reside on your Ansible server.

---
- hosts: all
  remote_user: root
  tasks:
    - name: my script
      script: /path/to/your/script.sh

The playbook can then be executed using this command.

ansible-playbook playbook.yml -i inventory.yml

The following should be produced.

PLAY [all]

TASK [Gathering Facts]
ok: [server1.example.com]

TASK [my script]
changed: [server1.example.com]

PLAY RECAP
server1.example.com : ok=2  changed=1  unreacable=0  failed=0

By default, no stdout is printed. The - debug option can be used to print output to the console.