make prometheus01 a revproxy

host_vars/prometheus01.vm.freifunk-stuttgart.de/revproxy

+---
+letsencrypt_account_email: "hostmaster@freifunk-stuttgart.de"
+letsencrypt_acme_directory: "https://acme-v02.api.letsencrypt.org/directory"
+vhosts:
+  - domain: prometheus01.vm.freifunk-stuttgart.de
+    backend: "http://127.0.0.1:9090/"
+    type: proxy

host_vars/prometheus01.vm.freifunk-stuttgart.de/ssh

+---
+ssh_disable_password_login: yes

inventory/role_revproxy

@@ -4,3 +4,4 @@ role_revproxy:
     revproxy-05.vm.freifunk-stuttgart.de:
     revproxy-03.vm.freifunk-stuttgart.de:
     revproxy-z10a.vm.freifunk-stuttgart.de:
+    prometheus01.vm.freifunk-stuttgart.de: