journal_upload: a node leaves its own NetBird address out of /etc/hosts, Traefik sees it as the cilium_host address

journal_upload/tasks/main.yml

@@ -16,12 +16,14 @@
     install_recommends: false
     state: present
 
+# A node reaching its own address arrives at Traefik from its cilium_host address, which the
+# NetBird allowlist rejects; it takes the other nodes.
 - name: Pin the ingest name to the NetBird addresses
   ansible.builtin.blockinfile:
     path: /etc/hosts
     marker: "# {mark} journal_upload"
     block: |
-      {% for address in journal_upload.addresses %}
+      {% for address in journal_upload.addresses | reject('in', ansible_facts.all_ipv4_addresses) %}
       {{ address }} {{ journal_upload.host }}
       {% endfor %}
   notify: Restart systemd-journal-upload