caddyhttp: Make metrics opt-in (#5042)

* caddyhttp: Make metrics opt-in

Related to #4644

* Make configurable in Caddyfile

1 files changed, 11 insertions, 0 deletions

diff --git a/caddyconfig/httpcaddyfile/serveroptions.go b/caddyconfig/httpcaddyfile/serveroptions.go
index f3e3d73..8e021fd 100644
--- a/caddyconfig/httpcaddyfile/serveroptions.go
+++ b/caddyconfig/httpcaddyfile/serveroptions.go
@@ -43,6 +43,7 @@ type serverOptions struct {
 	Protocols            []string
 	StrictSNIHost        *bool
 	ShouldLogCredentials bool
+	Metrics              *caddyhttp.Metrics
 }
 
 func unmarshalCaddyfileServerOptions(d *caddyfile.Dispenser) (any, error) {
@@ -175,6 +176,15 @@ func unmarshalCaddyfileServerOptions(d *caddyfile.Dispenser) (any, error) {
 				}
 				serverOpts.StrictSNIHost = &boolVal
 
+			case "metrics":
+				if d.NextArg() {
+					return nil, d.ArgErr()
+				}
+				if d.NextBlock(0) {
+					return nil, d.ArgErr()
+				}
+				serverOpts.Metrics = new(caddyhttp.Metrics)
+
 			// TODO: DEPRECATED. (August 2022)
 			case "protocol":
 				caddy.Log().Named("caddyfile").Warn("DEPRECATED: protocol sub-option will be removed soon")
@@ -259,6 +269,7 @@ func applyServerOptions(
 		server.MaxHeaderBytes = opts.MaxHeaderBytes
 		server.Protocols = opts.Protocols
 		server.StrictSNIHost = opts.StrictSNIHost
+		server.Metrics = opts.Metrics
 		if opts.ShouldLogCredentials {
 			if server.Logs == nil {
 				server.Logs = &caddyhttp.ServerLogConfig{}