fix(inputs.opcua): return an error with mismatched types (#11539)

plugins/inputs/opcua/opcua.go

@@ -312,7 +312,11 @@ func (o *OpcUA) validateOPCTags() error {
 
 		//search identifier type
 		switch node.tag.IdentifierType {
-		case "s", "i", "g", "b":
+		case "i":
+			if _, err := strconv.Atoi(node.tag.Identifier); err != nil {
+				return fmt.Errorf("identifier type '%s' does not match the type of identifier '%s'", node.tag.IdentifierType, node.tag.Identifier)
+			}
+		case "s", "g", "b":
 			// Valid identifier type - do nothing.
 		default:
 			return fmt.Errorf("invalid identifier type '%s' in '%s'", node.tag.IdentifierType, node.tag.FieldName)

plugins/inputs/opcua/opcua_test.go

@@ -208,6 +208,42 @@ additional_valid_status_codes = ["0xC0"]
 	require.Equal(t, o.Workarounds.AdditionalValidStatusCodes[0], "0xC0")
 }
 
+func TestConfigWithMismatchedTypes(t *testing.T) {
+	toml := `
+[[inputs.opcua]]
+name = "localhost"
+endpoint = "opc.tcp://localhost:4840"
+connect_timeout = "10s"
+request_timeout = "5s"
+security_policy = "auto"
+security_mode = "auto"
+certificate = "/etc/telegraf/cert.pem"
+private_key = "/etc/telegraf/key.pem"
+auth_method = "Anonymous"
+username = ""
+password = ""
+nodes = [
+  {name="name", namespace="1", identifier_type="s", identifier="one"},
+  {name="name2", namespace="2", identifier_type="i", identifier="two"},
+]
+`
+
+	c := config.NewConfig()
+	err := c.LoadConfigData([]byte(toml))
+	require.NoError(t, err)
+
+	require.Len(t, c.Inputs, 1)
+
+	o, ok := c.Inputs[0].Input.(*OpcUA)
+	require.True(t, ok)
+
+	require.Len(t, o.RootNodes, 2)
+	require.Equal(t, o.RootNodes[0].FieldName, "name")
+	require.Equal(t, o.RootNodes[1].FieldName, "name2")
+
+	require.Error(t, o.InitNodes())
+}
+
 func TestTagsSliceToMap(t *testing.T) {
 	m, err := tagsSliceToMap([][]string{{"foo", "bar"}, {"baz", "bat"}})
 	require.NoError(t, err)