[workers]
worker1 ansible_host=111.111.111.111
worker2 ansible_host=222.222.222.222

- hosts: worker1

  tasks:
  - name: inizialize worker
    uri:
      url: "http://{{ worker1 }}:8080/xxx/yyy"
      method: POST
      user: admin
      password: password
      force_basic_auth: yes
      return_content: yes
      body: "field=myfield"