- hosts: controller
  roles:
    - role: test-matrix
      test_matrix_role: primary 

- hosts: subnode
  roles:
    - role: test-matrix
      test_matrix_role: subnode

- hosts: all
  roles:
    - configure-swap
    - setup-stack-user
    - setup-tempest-user
    - setup-devstack-source-dirs
    - setup-devstack-log-dir
    - setup-devstack-cache
    - start-fresh-logging
    - write-devstack-local-conf