Use hostname module to set hostname, and do it for all Os not only CoreOS

roles/bootstrap-os/tasks/bootstrap-coreos.yml

@@ -50,11 +50,3 @@
     name: "{{ item }}"
   with_items: "{{pip_python_modules}}"
 
-- name: Check configured hostname
-  shell: hostname
-  register: configured_hostname
-  check_mode: no
-
-- name: Assign inventory name to unconfigured hostnames
-  shell: sh -c "echo \"{{inventory_hostname}}\" > /etc/hostname; hostname \"{{inventory_hostname}}\""
-  when: (configured_hostname.stdout == 'localhost')