adding a healthcheck endpoint that confirms communication with influxdb and sqlite.

ref: #381

webapp/backend/pkg/database/interface.go

@@ -10,6 +10,7 @@ import (
 
 type DeviceRepo interface {
 	Close() error
+	HealthCheck(ctx context.Context) error
 
 	RegisterDevice(ctx context.Context, dev models.Device) error
 	GetDevices(ctx context.Context) ([]models.Device, error)

webapp/backend/pkg/database/scrutiny_repository.go

@@ -195,6 +195,29 @@ func (sr *scrutinyRepository) Close() error {
 	return nil
 }
 
+func (sr *scrutinyRepository) HealthCheck(ctx context.Context) error {
+	//check influxdb
+	status, err := sr.influxClient.Health(ctx)
+	if err != nil {
+		return fmt.Errorf("influxdb healthcheck failed: %w", err)
+	}
+	if status.Status != "pass" {
+		return fmt.Errorf("influxdb healthcheckf failed: status=%s", status.Status)
+	}
+
+	//check sqlite db.
+	database, err := sr.gormClient.DB()
+	if err != nil {
+		return fmt.Errorf("sqlite healthcheck failed: %w", err)
+	}
+	err = database.Ping()
+	if err != nil {
+		return fmt.Errorf("sqlite healthcheck failed during ping: %w", err)
+	}
+	return nil
+
+}
+
 func InfluxSetupComplete(influxEndpoint string) (bool, error) {
 	influxUri, err := url.Parse(influxEndpoint)
 	if err != nil {

webapp/backend/pkg/web/handler/health_check.go

@@ -0,0 +1,29 @@
+package handler
+
+import (
+	"github.com/analogj/scrutiny/webapp/backend/pkg/database"
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"net/http"
+)
+
+func HealthCheck(c *gin.Context) {
+	logger := c.MustGet("LOGGER").(*logrus.Entry)
+	deviceRepo := c.MustGet("DEVICE_REPOSITORY").(database.DeviceRepo)
+	logger.Infof("Checking Influxdb & Sqlite health")
+
+	//check sqlite and influxdb health
+	err := deviceRepo.HealthCheck(c)
+	if err != nil {
+		logger.Errorln("An error occurred during healthcheck", err)
+		c.JSON(http.StatusInternalServerError, gin.H{"success": false, "error": err.Error()})
+		return
+	}
+
+	//TODO:
+	// check if the /web folder is populated.
+
+	c.JSON(http.StatusOK, gin.H{
+		"success": true,
+	})
+}

webapp/backend/pkg/web/server.go

@@ -34,15 +34,7 @@ func (ae *AppEngine) Setup(logger *logrus.Entry) *gin.Engine {
 	{
 		api := base.Group("/api")
 		{
-			api.GET("/health", func(c *gin.Context) {
-				//TODO:
-				// check if the /web folder is populated.
-				// check if access to influxdb
-				// check if access to sqlitedb.
-				c.JSON(http.StatusOK, gin.H{
-					"success": true,
-				})
-			})
+			api.GET("/health", handler.HealthCheck)
 			api.POST("/health/notify", handler.SendTestNotification) //check if notifications are configured correctly
 
 			api.POST("/devices/register", handler.RegisterDevices)         //used by Collector to register new devices and retrieve filtered list