only install kernel-devel on centos, only reboot on kernel change on centos

Former-commit-id: 2f0461f2

roles/upgrade/tasks/main.yml

@@ -21,10 +21,12 @@
   yum: name=kernel-devel state=latest
   become: true
   become_user: root
+  when: ansible_os_family=="RedHat"
 
 - name: get kernel-devel version
   shell: rpm -q kernel-devel | cut -f 3,4 -d "-"
   register: rpm_q_output
+  when: ansible_os_family=="RedHat"
 
 - name: get kernel version
   shell: uname -r
@@ -43,7 +45,8 @@
 - name: set reboot when kernel has changed
   set_fact: 
     reboot_now: true
-  when: not uname_r_output.stdout in rpm_q_output.stdout
+  when: not uname_r_output.stdout in rpm_q_output.stdout and ansible_os_family=="RedHat"
+
 
 - name: debug3
   debug: var=reboot_now