add ansible_hostname and ansible_fqdn to apiserver_sans (#4990)

roles/kubernetes/master/tasks/kubeadm-setup.yml

@@ -55,7 +55,7 @@
 
 - name: kubeadm | aggregate all SANs
   set_fact:
-    apiserver_sans: "{{ (sans_base + groups['kube-master'] + sans_lb + sans_lb_ip + sans_supp + sans_access_ip + sans_ip + sans_address + sans_override) | unique }}"
+    apiserver_sans: "{{ (sans_base + groups['kube-master'] + sans_lb + sans_lb_ip + sans_supp + sans_access_ip + sans_ip + sans_address + sans_override + sans_hostname + sans_fqdn) | unique }}"
   vars:
     sans_base:
       - "kubernetes"
@@ -72,6 +72,8 @@
     sans_ip: "{{ groups['kube-master'] | map('extract', hostvars, 'ip') | list | select('defined') | list }}"
     sans_address: "{{ groups['kube-master'] | map('extract', hostvars, ['ansible_default_ipv4', 'address']) | list | select('defined') | list }}"
     sans_override: "{{ [kube_override_hostname] if kube_override_hostname else [] }}"
+    sans_hostname: "{{ groups['kube-master'] | map('extract', hostvars, ['ansible_hostname']) | list | select('defined') | list }}"
+    sans_fqdn: "{{ groups['kube-master'] | map('extract', hostvars, ['ansible_fqdn']) | list | select('defined') | list }}"
   tags: facts
 
 - name: Create audit-policy directory