fix: Check for k3s service instead of binary for proper HA join detection

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

@@ -1,25 +1,28 @@
 ---
-- name: Check if k3s is already installed
+- name: Check if k3s service exists
   stat:
-    path: /usr/local/bin/k3s
-  register: k3s_binary
+    path: /etc/systemd/system/k3s.service
+  register: k3s_service
+
+- name: Check if k3s is part of cluster
+  stat:
+    path: /var/lib/rancher/k3s/server/node-token
+  register: k3s_cluster_member
 
 - name: Download k3s install script
   get_url:
     url: https://get.k3s.io
     dest: /tmp/install-k3s.sh
     mode: "0755"
-  when: not k3s_binary.stat.exists
+  when: not k3s_service.stat.exists
 
 - name: Install k3s server (primary)
   environment:
     INSTALL_K3S_VERSION: "{{ k3s_version if k3s_version != 'latest' else '' }}"
     K3S_TOKEN: "{{ k3s_token }}"
   command: /tmp/install-k3s.sh server --cluster-init
-  args:
-    creates: /usr/local/bin/k3s
   when: 
-    - not k3s_binary.stat.exists
+    - not k3s_service.stat.exists
     - k3s_primary | default(false)
 
 - name: Install k3s server (secondary)
@@ -27,10 +30,8 @@
     INSTALL_K3S_VERSION: "{{ k3s_version if k3s_version != 'latest' else '' }}"
     K3S_TOKEN: "{{ k3s_token }}"
   command: /tmp/install-k3s.sh server --server https://{{ k3s_primary_ip }}:6443
-  args:
-    creates: /usr/local/bin/k3s
   when: 
-    - not k3s_binary.stat.exists
+    - not k3s_service.stat.exists
     - not (k3s_primary | default(false))
 
 - name: Wait for k3s to be ready