Set relay quota per participant at 12 default for dual peer connection + resume scenarios (#4745)

config-sample.yaml

@@ -300,6 +300,10 @@ keys:
 #   # set UDP port range for TURN relay to connect to LiveKit SFU, by default it uses a any available port
 #   relay_range_start: 1024
 #   relay_range_end: 30000
+#   # caps the number of concurrent relay allocations a single participant credential may hold.
+#   # prevents one authenticated participant from exhausting the shared relay-port range for everyone else.
+#   # defaults to 12; a value <= 0 disables the quota.
+#   per_user_relay_allocation_limit: 12
 #   # set external_tls to true if using a L4 load balancer to terminate TLS. when enabled,
 #   # LiveKit expects unencrypted traffic on tls_port, and still advertise tls_port as a TURN/TLS candidate.
 #   external_tls: true

pkg/config/config.go

@@ -64,7 +64,7 @@ const (
 	// allocations a single participant credential may hold on the embedded TURN
 	// server. It prevents one authenticated participant from exhausting the
 	// shared relay-port range for everyone else. A value <= 0 disables the quota.
-	DefaultTURNPerUserRelayAllocationLimit = 4
+	DefaultTURNPerUserRelayAllocationLimit = 12
 )
 
 var (