Add redis connection test before start

internal/database/db.go

@@ -32,6 +32,15 @@ func ConnectDB(dbConfig *redis.Options) *redis.Client {
 	return localDb
 }
 
+// Ping test connection to Redis database
+func Ping(db *redis.Client) error {
+	status := db.Ping(ctx)
+	if status.String() != "ping: PONG" {
+		return &PingError{}
+	}
+	return nil
+}
+
 func (config DBConfig) InsertPaste(key string, content string, secret string, ttl time.Duration) {
 	type dbSchema struct {
 		content string

internal/database/error.go

@@ -0,0 +1,7 @@
+package database
+
+type PingError struct{}
+
+func (m *PingError) Error() string {
+	return "Connection to redis not work"
+}

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"embed"
+	"log"
 
 	"git.gnous.eu/gnouseu/plakken/internal/config"
 	"git.gnous.eu/gnouseu/plakken/internal/database"
@@ -19,6 +20,10 @@ func main() {
 	initConfig := config.GetConfig()
 	dbConfig := database.InitDB(initConfig.RedisAddress, initConfig.RedisUser, initConfig.RedisPassword, initConfig.RedisDB)
 	db := database.ConnectDB(dbConfig)
+	err := database.Ping(db)
+	if err != nil {
+		log.Fatal(err)
+	}
 
 	serverConfig := httpServer.ServerConfig{
 		HTTPServer: httpServer.Config(initConfig.ListenAddress),