fix: Use private IP for k3s HA cluster join and advertise

ansible/roles/k3s-server/tasks/main.yml

@@ -20,7 +20,7 @@
   environment:
     INSTALL_K3S_VERSION: "{{ k3s_version if k3s_version != 'latest' else '' }}"
     K3S_TOKEN: "{{ k3s_token }}"
-  command: /tmp/install-k3s.sh server --cluster-init
+  command: /tmp/install-k3s.sh server --cluster-init --advertise-address={{ k3s_primary_ip }}
   when: 
     - not k3s_service.stat.exists
     - k3s_primary | default(false)

ansible/site.yml

@@ -20,6 +20,7 @@
   vars:
     k3s_primary: true
     k3s_token: "{{ lookup('password', '/dev/null length=32 chars=ascii_letters,digits') }}"
+    k3s_primary_ip: "{{ ansible_all_ipv4_addresses | select('match', '^10\\.') | first }}"
 
   roles:
     - k3s-server
@@ -33,10 +34,14 @@
       register: node_token
       changed_when: false
 
+    - name: Get private IP
+      set_fact:
+        k3s_primary_private_ip: "{{ ansible_all_ipv4_addresses | select('match', '^10\\.') | first }}"
+
     - name: Set join token fact
       set_fact:
         k3s_token: "{{ node_token.stdout }}"
-        k3s_primary_ip: "{{ ansible_default_ipv4.address }}"
+        k3s_primary_ip: "{{ k3s_primary_private_ip }}"
 
     - name: Fetch kubeconfig
       fetch: