roles: rkt: Add support for SUSE distributions

The RPM file that's provided by upstream can be used for SUSE
distributions as well. Moreover we simplify the playbook to use
the 'package' module to install packages across different distros.

Link: https://github.com/rkt/rkt/pull/3904

roles/rkt/tasks/install.yml

@@ -15,22 +15,11 @@
   tags:
     - facts
 
-- name: install rkt pkg on ubuntu
+- name: install rkt pkg
-  apt:
+  package:
-    deb: "{{ rkt_download_url }}/{{ rkt_pkg_name }}"
+    name: "{{ rkt_download_url }}/{{ rkt_pkg_name }}"
     state: present
   register: rkt_task_result
   until: rkt_task_result|succeeded
   retries: 4
   delay: "{{ retry_stagger | random + 3 }}"
-  when: ansible_os_family == "Debian"
-
-- name: install rkt pkg on centos
-  yum:
-    pkg: "{{ rkt_download_url }}/{{ rkt_pkg_name }}"
-    state: present
-  register: rkt_task_result
-  until: rkt_task_result|succeeded
-  retries: 4
-  delay: "{{ retry_stagger | random + 3 }}"
-  when: ansible_os_family == "RedHat"

roles/rkt/vars/suse.yml

@@ -0,0 +1,2 @@
+---
+rkt_pkg_name: "rkt-{{ rkt_pkg_version }}.x86_64.rpm"