[resourcemanager] Do not treat empty node config as error

Signed-off-by: Oleksandr Grytsov <oleksandr_grytsov@epam.com>

Author: al1img

resourcemanager/resourcemanager.go

@@ -381,6 +381,13 @@ func (resourcemanager *ResourceManager) loadNodeConfiguration() (err error) {
 
 	byteValue, err := os.ReadFile(resourcemanager.nodeConfigFile)
 	if err != nil {
+		if os.IsNotExist(err) {
+			// Don't treat absent config as an error.
+			resourcemanager.nodeConfig.Version = "0.0.0"
+
+			return nil
+		}
+
 		return aoserrors.Wrap(err)
 	}
 

resourcemanager/resourcemanager_internal_test.go

@@ -421,23 +421,12 @@ func TestNotExistNodeConfig(t *testing.T) {
 		t.Fatalf("Can't create resource manager: %v", err)
 	}
 
-	if err = rm.nodeConfigError; err == nil {
-		t.Error("Node config should be invalid if config is not exits")
-	}
-}
-
-func TestInvalidVersionNodeConfig(t *testing.T) {
-	if err := writeTestNodeConfigFile(createWrongVersionNodeConfigJSON()); err != nil {
-		t.Fatalf("Can't write node config: %v", err)
-	}
-
-	rm, err := New(path.Join(tmpDir, "aos_node_wrong_version.cfg"), &alertSender{})
-	if err != nil {
-		t.Fatalf("Can't create resource manager: %v", err)
+	if err = rm.nodeConfigError; err != nil {
+		t.Error("Node config should be valid if config is not exits")
 	}
 
-	if err = rm.nodeConfigError; err == nil {
-		t.Errorf("Node config should be invalid in case of version mismatch")
+	if rm.nodeConfig.Version != "0.0.0" {
+		t.Error("Wrong node config version")
 	}
 }
 
@@ -629,7 +618,7 @@ func cleanup() (err error) {
 func createWrongVersionNodeConfigJSON() (configJSON string) {
 	return `{
 	"formatVersion": 256,
-	"version": "1.0.0",
+	"version": "1.0",
 	"devices": [
 		{
 			"name": "random",