Added roles, group_vars and sample for debian setup.

group_vars/all

+---
+
+base_open_build_url: http://download.opensuse.org/repositories/home:/VIFIBnexedi/
+

roles/package/tasks/main.yml

+  - name: Install slapos-node on Debian
+    apt: name=slapos-node state=present update_cache=yes cache_valid_time=3600
+    when: ansible_os_family == "Debian"
+
+  - name: Install re6stnet on Debian
+    apt: name=re6stnet state=present update_cache=yes cache_valid_time=3600
+    when: ansible_os_family == "Debian"
+
+  - name: Install re6stnet on CentOS
+    yum: name=re6st-node state=present update_cache=yes cache_valid_time=3600
+    when: ansible_os_family == "RedHat"
+
+  - name: Install slapos on CentOS
+    yum: name=slapos-node state=present update_cache=yes cache_valid_time=3600
+    when: ansible_os_family == "RedHat"

roles/repository/tasks/main.yml

+
+  - name: Install Debian 7 repository key
+    apt_key: url={{ base_open_build_url }}/Debian_7.0/Release.key state=present
+    when: ansible_distribution == "Debian" and ansible_distribution_major_version == "7"
+
+  - name: Install Debian 6 repository key
+    apt_key: url={{ base_open_build_url }}/Debian_6.0/Release.key state=present
+    when: ansible_distribution == "Debian" and ansible_distribution_major_version == "6"
+
+  - name: Install Debian 7 repository
+    apt_repository: repo='deb {{ base_open_build_url }}/Debian_7.0/ ./' state=present
+    when: ansible_distribution == "Debian" and ansible_distribution_major_version == "7"
+
+  - name: Install Debian 6 repository
+    apt_repository: repo='deb {{ base_open_build_url }}/Debian_6.0/ ./' state=present
+    when: ansible_distribution == "Debian" and ansible_distribution_major_version == "6"

site.yml

 - name: a play that runs entirely on the ansible host
   hosts: 127.0.0.1
   connection: local
-  tasks:
-  - name: Install slapos-node
-    apt: name=slapos-node state=present update_cache=yes cache_valid_time=3600
-
-  - name: Install re6stnet
-    apt: name=re6stnet state=present update_cache=yes cache_valid_time=3600
-
-  
+  roles:
+    - repository
+    - package
+