backblaze s3 provider support only STANDARD storage class, fix #1086

Signed-off-by: Slach <bloodjazman@gmail.com>

Author: Slach

ChangeLog.md

@@ -14,6 +14,7 @@ IMPROVEMENTS
 
 BUG FIXES
 
+- `backblaze` s3 provider support only STANDARD storage class, fix [1086](https://github.com/Altinity/clickhouse-backup/issues/1086)
 - fix `--restore-database-mapping` with special characters in source table, fix
   reopened [820](https://github.com/Altinity/clickhouse-backup/issues/820#issuecomment-2675628282),
   thanks @IvaskevychYuriy

pkg/config/config.go

@@ -358,6 +358,11 @@ func LoadConfig(configLocation string) (*Config, error) {
 
 	log_helper.SetLogLevelFromString(cfg.General.LogLevel)
 
+	// https://github.com/Altinity/clickhouse-backup/issues/1086
+	if cfg.General.RemoteStorage == "s3" && strings.Contains(cfg.S3.Endpoint, "backblaze") && cfg.S3.StorageClass != string(s3types.StorageClassStandard) {
+		log.Warn().Str("endpoint", cfg.S3.Endpoint).Str("storageClass", cfg.S3.StorageClass).Msgf("unsopported STORAGE_CLASS, will use %s", string(s3types.StorageClassStandard))
+		cfg.S3.StorageClass = string(s3types.StorageClassStandard)
+	}
 	if err = ValidateConfig(cfg); err != nil {
 		return cfg, err
 	}