Merge pull request #985 from rutsky/check-mode-for-shell-commands

set "check_mode: on" for read-only "shell" steps that registers result

roles/kubernetes/preinstall/tasks/main.yml

@@ -108,6 +108,7 @@
   shell: rpm -qa | grep epel-release || rpm -ivh {{ epel_rpm_download_url }}
   when: ansible_distribution in ["CentOS","RedHat"]
   changed_when: False
+  check_mode: no
   tags: bootstrap-os
 
 - name: Install packages requirements

roles/kubernetes/preinstall/tasks/set_resolv_facts.yml

@@ -4,6 +4,7 @@
   register: resolvconf
   failed_when: false
   changed_when: false
+  check_mode: no
 
 - set_fact:
     resolvconf: >-