How to differentiate execution of ansible roles for different hosts?

Question

Ansible

Good afternoon! There is one playbook that runs two roles.
The first role - should be executed only on host 1 and host 2 and not touch host 3.
The second role - only on host 3 and not touch 1 and 2.

Can this be implemented within one playbook without splitting it?

PS. The playbook is launched from jenkins.

Answer 1

- name: For host1 and host2
  hosts: host1,host2
  roles:
    - role1
    - role2
    - role3

- name: For host3
  hosts: host3
  roles:
    - role2
    - role4