add the error log to indicate which oracle dsn

Author: shinhwagk

.devcontainer/devcontainer.json

@@ -13,27 +13,26 @@
 			"NODE_VERSION": "none"
 		}
 	},
-	"runArgs": [ "--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined" ],
-
+	"runArgs": [
+		"--cap-add=SYS_PTRACE",
+		"--security-opt",
+		"seccomp=unconfined"
+	],
 	// Set *default* container specific settings.json values on container create.
 	"settings": {
 		"go.toolsManagement.checkForUpdates": "local",
 		"go.useLanguageServer": true,
 		"go.gopath": "/go",
 		"go.goroot": "/usr/local/go"
 	},
-
 	// Add the IDs of extensions you want installed when the container is created.
 	"extensions": [
 		"golang.Go"
 	],
-
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	// "forwardPorts": [],
-
 	// Use 'postCreateCommand' to run commands after the container is created.
 	// "postCreateCommand": "go version",
-
 	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
 	"remoteUser": "vscode"
-}
+}

.devcontainer1/Dockerfile

@@ -80,7 +80,7 @@ type Exporter struct {
 func NewExporter(collects []string, dsn string, logger log.Logger) *Exporter {
 	return &Exporter{
 		logger:   logger,
-		md:       MultiDatabase{Addr: *multidatabaseAddr, Dsn: dsn},
+		md:       MultiDatabase{addr: *multidatabaseAddr, dsn: dsn},
 		collects: collects,
 		mp:       MetricProcessor{logger: logger},
 		duration: prometheus.NewGauge(prometheus.GaugeOpts{

.devcontainer1/devcontainer.json

@@ -9,8 +9,8 @@ import (
 )
 
 type MultiDatabase struct {
-	Addr string
-	Dsn  string
+	addr string
+	dsn  string
 }
 
 type MultiDatabaseRequest struct {
@@ -32,13 +32,13 @@ func (md MultiDatabase) Ping() error {
 }
 
 func (md MultiDatabase) Query(sqlText string) ([]map[string]interface{}, error) {
-	json_data, err := json.Marshal(MultiDatabaseRequest{md.Dsn, sqlText, []interface{}{}})
+	json_data, err := json.Marshal(MultiDatabaseRequest{md.dsn, sqlText, []interface{}{}})
 
 	if err != nil {
 		return nil, err
 	}
 
-	url := fmt.Sprintf("http://%s/query", md.Addr)
+	url := fmt.Sprintf("http://%s/query", md.addr)
 	// resp, err := http.Post(url, "application/json",
 	// 	bytes.NewBuffer(json_data))
 	req, err := http.NewRequest("POST", url, bytes.NewBuffer(json_data))

main.go

@@ -150,6 +150,7 @@ func (mp MetricProcessor) GeneratePrometheusMetrics(parse func(row map[string]st
 	// }
 
 	if err != nil {
+		level.Error(mp.logger).Log("Error for oracle query: ", md.dsn, err)
 		return err
 	}