add code to detect if epel is already installed and skip it if it is

roles/kubernetes/preinstall/tasks/main.yml

@@ -78,10 +78,17 @@
         ansible_distribution_major_version > 21
   changed_when: False
 
+- name: Check if epel-release-7-5.noarch is installed
+  command: rpm -q epel-release-7-5.noarch
+  register: epel_check
+  when: ansible_distribution in ["CentOS","RedHat"] and
+        ansible_distribution_major_version >= 7
+
 - name: Install epel-release on RedHat/CentOS
   command: rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
   when: ansible_distribution in ["CentOS","RedHat"] and
-        ansible_distribution_major_version >= 7
+        ansible_distribution_major_version >= 7 and
+        epel_check.stdout.find('is not installed') != -1
   changed_when: False
 
 - name: Install packages requirements