fix: preflight use inline python for API call to avoid variable scope issue

roles/proxmox_upgrade/tasks/preflight.yml

@@ -2,7 +2,7 @@
 # =============================================================================
 # proxmox_upgrade — preflight.yml
 # Check cluster health before starting any upgrade work
-# All tasks delegate_to: localhost — uses API only
+# All API checks done in single tasks on localhost to avoid variable scope issues
 # =============================================================================
 
 - name: Preflight | Check quorum via pvecm
@@ -12,24 +12,39 @@
   changed_when: false
   failed_when: quorum_check.rc != 0
 
-- name: Preflight | Get cluster node status via API
-  ansible.builtin.uri:
-    url: "https://{{ api_host }}:{{ api_port }}/api2/json/nodes"
-    method: GET
-    headers:
-      Authorization: "PVEAPIToken={{ api_token_id }}={{ api_token_secret }}"
-    validate_certs: false
-  register: cluster_nodes
+- name: Preflight | Check all cluster nodes online via API
+  ansible.builtin.shell: |
+    python3 << 'PYEOF'
+    import urllib.request, urllib.error, json, ssl
+
+    ctx = ssl.create_default_context()
+    ctx.check_hostname = False
+    ctx.verify_mode = ssl.CERT_NONE
+
+    req = urllib.request.Request(
+        "https://{{ api_host }}:{{ api_port }}/api2/json/nodes",
+        headers={"Authorization": "PVEAPIToken={{ api_token_id }}={{ api_token_secret }}"}
+    )
+    with urllib.request.urlopen(req, context=ctx) as r:
+        data = json.loads(r.read())["data"]
+
+    offline = [n for n in data if n["status"] != "online"]
+    if offline:
+        print("FAIL: " + ", ".join(f"{n['node']}={n['status']}" for n in offline))
+        exit(1)
+    else:
+        print("OK: " + ", ".join(f"{n['node']}={n['status']}" for n in data))
+        exit(0)
+    PYEOF
+  register: node_check
+  changed_when: false
+  failed_when: node_check.rc != 0
   delegate_to: localhost
   run_once: true
 
-- name: Preflight | Check all nodes are online
-  ansible.builtin.fail:
-    msg: >
-      Cluster health check FAILED — node {{ item.node }} is {{ item.status }}.
-      Aborting upgrade to prevent data loss. Investigate before retrying.
-  loop: "{{ cluster_nodes.json.data }}"
-  when: item.status != 'online'
+- name: Preflight | Log node status
+  ansible.builtin.debug:
+    msg: "{{ node_check.stdout }}"
   delegate_to: localhost
   run_once: true
 
@@ -55,7 +70,7 @@
 
 - name: Preflight | Cluster health check passed
   ansible.builtin.debug:
-    msg: "Cluster health check passed — all {{ cluster_nodes.json.data | length }} nodes online, quorum OK{{ ', CEPH checked' if ceph_enabled else '' }}"
+    msg: "Cluster health check passed — all nodes online, quorum OK{{ ', CEPH checked' if ceph_enabled else '' }}"
   delegate_to: localhost
   run_once: true