add ability to log to file, update to v2.28.1 and fix 'first upgrade' issue

internal/config/config.go

@@ -13,7 +13,8 @@ var (
 	ConfigFile string
 	Output     string
 	Password   string
-	Verbose    bool
+	Verbose    int
+	LogFile    string
 )
 
 type Host struct {
@@ -27,7 +28,8 @@ type Host struct {
 type Config struct {
 	BaseDir          string
 	InventoryDir     string
-	Verbose          bool
+	Verbose          int
+	LogFile          string
 	KubeconfigFile   string
 	Forks            string `yaml:"forks" env-default:"10"`
 	InstallationName string `yaml:"installation_name" env-default:"cluster.local"`
@@ -52,7 +54,7 @@ type Config struct {
 
 var instance *Config
 
-func createConfig(configFile string, out string, password string, verbose bool) *Config {
+func createConfig(configFile string, out string, password string, verbose int, logFile string) *Config {
 	instance = &Config{}
 
 	if err := cleanenv.ReadConfig(configFile, instance); err != nil {
@@ -77,17 +79,21 @@ func createConfig(configFile string, out string, password string, verbose bool)
 	}
 
 	instance.Verbose = verbose
+	instance.LogFile = logFile
 
 	err := validateConfig(*instance)
 	if err != nil {
 		logging.Log.Fatal(err.Error())
 	}
+
+	logging.SetupLogging(instance.Verbose, instance.LogFile)
+
 	return instance
 }
 
 func GetConfig() *Config {
 	if instance == nil {
-		createConfig(ConfigFile, Output, Password, Verbose)
+		createConfig(ConfigFile, Output, Password, Verbose, LogFile)
 	}
 	return instance
 }