Support default api_endpoint

Signed-off-by: Derek Nola <derek.nola@suse.com>

inventory-sample.yml

@@ -15,11 +15,13 @@ k3s_cluster:
     ansible_user: debian
     k3s_version: v1.26.9+k3s1
     token: "mytoken"  # Use ansible vault if you want to keep it secret
-    api_endpoint: "{{ hostvars[groups['server'][0]]['ansible_host'] | default(groups['server'][0]) }}"
     extra_server_args: ""
     extra_agent_args: ""
 
   # Optional vars
+    # IP or Hostname that servers and agents connect to. defaults to the first server in the inventory,
+    # but can be overriden if using a load balancer or other proxy.
+    # api_endpoint: 192.16.35.11
     # api_port: 6443
     # k3s_server_location: /var/lib/rancher/k3s
     # systemd_dir: /etc/systemd/system

roles/k3s_agent/defaults/main.yml

@@ -2,3 +2,4 @@
 k3s_server_location: "/var/lib/rancher/k3s"
 systemd_dir: "/etc/systemd/system"
 api_port: 6443
+api_endpoint: "{{ hostvars[groups['server'][0]]['ansible_host'] | default(groups['server'][0]) }}"

roles/k3s_server/defaults/main.yml

@@ -4,3 +4,4 @@ systemd_dir: "/etc/systemd/system"
 api_port: 6443
 kubeconfig: ~/.kube/config.new
 user_kubectl: true
+api_endpoint: "{{ hostvars[groups['server'][0]]['ansible_host'] | default(groups['server'][0]) }}"