Add Load Balancer IP to API servers SANs (#4775)

- Add loadbalancer_apiserver.address to apiserver_sans

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_supp + sans_access_ip + sans_ip + sans_address) | unique }}"
+    apiserver_sans: "{{ (sans_base + groups['kube-master'] + sans_lb + sans_lb_ip + sans_supp + sans_access_ip + sans_ip + sans_address) | unique }}"
   vars:
     sans_base:
       - "kubernetes"
@@ -66,6 +66,7 @@
       - "localhost"
       - "127.0.0.1"
     sans_lb: "{{ [apiserver_loadbalancer_domain_name] if apiserver_loadbalancer_domain_name is defined else [] }}"
+    sans_lb_ip: "{{ [loadbalancer_apiserver.address] if loadbalancer_apiserver is defined and loadbalancer_apiserver.address is defined else [] }}"
     sans_supp: "{{ supplementary_addresses_in_ssl_keys if supplementary_addresses_in_ssl_keys is defined else [] }}"
     sans_access_ip: "{{ groups['kube-master'] | map('extract', hostvars, 'access_ip') | list | select('defined') | list }}"
     sans_ip: "{{ groups['kube-master'] | map('extract', hostvars, 'ip') | list | select('defined') | list }}"