update: add k3s_url_ip variable to configuration files and update references in Ansible playbooks

vagrant/dev/ubuntu/ansible/install_keepalived.yaml

@@ -6,8 +6,7 @@
   serial: 1 # Ensure tasks are executed one host at a time
 
   vars_files:
-    - vault.yml
-    - vars.yml
+    - vars.yaml
 
   vars:
     tailscale_host: "{{ hostvars[inventory_hostname]['tailscale_host'] }}"
@@ -22,6 +21,9 @@
     #     msg: "{{ item.key }}: {{ item.value.ipv4 | map(attribute='address') | list }}"
     #   with_dict: "{{ ansible_facts['network_interfaces'] }}"
     #   when: ansible_facts['network_interfaces'] is defined
+    # - name: Debug k3s_url_ip
+    #   ansible.builtin.debug:
+    #     msg: "k3s_url_ip: {{ k3s_url_ip }}"
 
     - name: Detect interface with the desired IP range
       ansible.builtin.set_fact:
@@ -65,7 +67,7 @@
               auth_pass mysecret
             }
             virtual_ipaddress {
-              192.168.56.250
+              {{ k3s_url_ip }}
             }
           }
         owner: root