caddy: add site.no_upsream_host

seb4itik/byow/roles/caddy/defaults/main.yml

@@ -114,6 +114,7 @@ caddy_coraza_crs_plugins:
 caddy_sites: []
 # - id: ""                   # Mandatory: short id for the site (for site specific directories and files)
 #   name: ""                 # Mandatory: canonical domain name
+#   no_upstream_host: false  # Optionnal: Host header hostport, not upstream_hostport, default false
 #   paths:                   # Mandatory: targets for the reverse proxy
 #     - path: "*"            # Optionnal: path of the request, default "*"
 #       strip_prefix: false  # Optionnal: default "false"

seb4itik/byow/roles/caddy/templates/Caddyfile

@@ -152,6 +152,11 @@
     reverse_proxy {
       to {{ path.addrs | join(' ') }}
       header_up X-Real-IP {remote}
+{% if site.no_upstream_host | default(caddy_sites_defaults.site_no_upstream_host) %}
+      header_up Host {hostport}
+{% else %}
+      header_up Host {upstream_hostport}
+{% endif %}
       lb_policy {{ site.proxy_lb_policy | default(caddy_sites_defaults.proxy_lb_policy) }}
 
 {% if site.proxy_active_checks | default(caddy_sites_defaults.proxy_active_checks) %}

seb4itik/byow/roles/caddy/vars/main.yml

@@ -4,6 +4,7 @@ caddy_global_sites_defaults:
   # Site aliases
   site_aliases: []
   site_aliases_redirect: true
+  site_no_upstream_host: false
 
   # Proxy settings
   # See: https://caddyserver.com/docs/caddyfile/directives/reverse_proxy#lb_policy