update slides and code

etc/haproxy/haproxy.cfg

@@ -111,8 +111,6 @@ frontend external
     bind 0.0.0.0:80,:::80
     bind 0.0.0.0:443,:::443 ssl strict-sni alpn h2,http/1.1 crt /etc/haproxy/ssl
 
-    capture request header Host len 32
-
     option forwardfor
 
     errorfiles boost-default-errors
@@ -123,8 +121,10 @@ frontend external
     # Remove a possible x-forwarded-for header already present
     http-request del-header x-forwarded-for if { req.hdr(x-forwarded-for) -m found }
 
-    # store the Host header in lowercase, to speedup ACL later
+    # Store the Host header in lowercase, to speedup ACL later
     http-request set-var(req.hdr_host) req.hdr(host),lower
+    # Capture host header in logs
+    http-request capture var(req.hdr_host) len 32
 
     # Is the request coming for the server itself (stats…)
     acl self     var(req.hdr_host) -m str my-hostname my-hostname.domain.tld
@@ -220,13 +220,16 @@ backend goto_internal
 frontend internal
     bind /run/haproxy-frontend-default.sock user root mode 666 accept-proxy
 
-    capture request header Host len 32
-
     option forwardfor
 
     # Check URL (used by Varnish)
     monitor-uri /haproxycheck
 
+    # Store the Host header in lowercase, to speedup ACL later
+    http-request set-var(req.hdr_host) req.hdr(host),lower
+    # Capture host header in logs
+    http-request capture var(req.hdr_host) len 32
+
     acl varnish_from        hdr(X-Varnish) -m found
     acl forwarded_proto     hdr(x-forwarded-proto) -m found