gistfile1.txt

    - name: Collect public key
      slurp: src="/var/lib/postgresql/.ssh/id_rsa.pub"
      register: mykey


-
    - name: Setup ssh keys
      authorized_key: key="{{mykey.content.decode('base64')}}" user="backup"
      delegate_to: "{{item}}"
      with_items: groups['backup']