itests: run etcd itests with generated ports

Makefile

@@ -176,7 +176,7 @@ itest: build-itest itest-only
 itest-parallel: build-itest
 	@$(call print, "Running tests")
 	rm -rf lntest/itest/*.log lntest/itest/.logs-*; date
-	EXEC_SUFFIX=$(EXEC_SUFFIX) echo "$$(seq 0 $$(expr $(ITEST_PARALLELISM) - 1))" | xargs -P $(ITEST_PARALLELISM) -n 1 -I {} scripts/itest_part.sh {} $(NUM_ITEST_TRANCHES) $(TEST_FLAGS)
+	EXEC_SUFFIX=$(EXEC_SUFFIX) echo "$$(seq 0 $$(expr $(ITEST_PARALLELISM) - 1))" | xargs -P $(ITEST_PARALLELISM) -n 1 -I {} scripts/itest_part.sh {} $(NUM_ITEST_TRANCHES) $(TEST_FLAGS) $(ITEST_FLAGS)
 	lntest/itest/log_check_errors.sh
 
 unit: btcd

lntest/node.go

@@ -298,6 +298,19 @@ func (cfg NodeConfig) genArgs() []string {
 	if cfg.Etcd {
 		args = append(args, "--db.backend=etcd")
 		args = append(args, "--db.etcd.embedded")
+		args = append(
+			args, fmt.Sprintf(
+				"--db.etcd.embedded_client_port=%v",
+				nextAvailablePort(),
+			),
+		)
+		args = append(
+			args, fmt.Sprintf(
+				"--db.etcd.embedded_peer_port=%v",
+				nextAvailablePort(),
+			),
+		)
+		args = append(args, "--db.etcd.embedded")
 	}
 
 	if cfg.FeeURL != "" {