feat(helm): clusters update

ansible/playbooks/site.yml

@@ -167,3 +167,37 @@
           {{ nodes.stdout }}
           ══════════════════════════════════════════════════════════════
       when: cluster_init | default(false)
+
+# ============================================
+# K3s 卸载 (需显式指定: --tags uninstall)
+# ============================================
+- name: Uninstall K3s agents
+  hosts: agents
+  gather_facts: false
+  tags: [uninstall, never]
+  tasks:
+    - name: Check agent uninstall script
+      ansible.builtin.stat:
+        path: /usr/local/bin/k3s-agent-uninstall.sh
+      register: agent_uninstall_script
+
+    - name: Run k3s-agent-uninstall.sh
+      ansible.builtin.command: /usr/local/bin/k3s-agent-uninstall.sh
+      when: agent_uninstall_script.stat.exists
+      changed_when: true
+
+- name: Uninstall K3s masters
+  hosts: masters
+  gather_facts: false
+  serial: 1
+  tags: [uninstall, never]
+  tasks:
+    - name: Check server uninstall script
+      ansible.builtin.stat:
+        path: /usr/local/bin/k3s-uninstall.sh
+      register: server_uninstall_script
+
+    - name: Run k3s-uninstall.sh
+      ansible.builtin.command: /usr/local/bin/k3s-uninstall.sh
+      when: server_uninstall_script.stat.exists
+      changed_when: true