QUIC proxy peering

api/types/constants.go

@@ -1037,10 +1037,10 @@ const (
 	// group they should attempt to be connected to.
 	ProxyGroupGenerationLabel = TeleportInternalLabelPrefix + "proxygroup-gen"
 
-	// ProxyPeerQUICLabel is the internal-user label for proxy heartbeats that's
-	// used to signal that the proxy supports receiving proxy peering
-	// connections over QUIC.
-	ProxyPeerQUICLabel = TeleportInternalLabelPrefix + "proxy-peer-quic"
+	// UnstableProxyPeerQUICLabel is the internal-use label for proxy heartbeats
+	// that's used to signal that the proxy supports receiving proxy peering
+	// connections over QUIC. The value should be "yes".
+	UnstableProxyPeerQUICLabel = TeleportInternalLabelPrefix + "proxy-peer-quic"
 
 	// OktaAppNameLabel is the individual app name label.
 	OktaAppNameLabel = TeleportInternalLabelPrefix + "okta-app-name"

lib/config/configuration.go

@@ -2722,6 +2722,10 @@ func Configure(clf *CommandLineFlags, cfg *servicecfg.Config, legacyAppFlags boo
 		cfg.DebugService.Enabled = false
 	}
 
+	if os.Getenv("TELEPORT_UNSTABLE_QUIC_PROXY_PEERING") == "yes" {
+		cfg.Proxy.QUICProxyPeering = true
+	}
+
 	return nil
 }