// error returned in IAM subsystem when an account doesn't exist.
var errNoSuchAccount = errors.New("Specified account does not exist")

// error returned in IAM subsystem when groups doesn't exist.
var errNoSuchGroup = errors.New("Specified group does not exist")

// error returned in IAM subsystem when a policy attach/detach request has no
// net effect, i.e. it is already applied.

// target are valid. It checks both the configuration store as well as
// environment variables.
func (c Config) CheckValidKeys(subSys string, deprecatedKeys []string) error {
	defKVS, ok := DefaultKVS[subSys]
	if !ok {
		return Errorf("Subsystem %s does not exist", subSys)
	}

	// Make a list of valid keys for the subsystem including the `comment`
	// key.

	var l string
	if anonFlag {
		l = reflect.TypeOf(err).String()
	} else {
		l = fmt.Sprintf("%v (%T)", err, err)
	}
	return buildLogEntry(ctx, subsystem, l, getTrace(3), errKind...)
}

func logToEntry(ctx context.Context, subsystem, message string, errKind ...interface{}) log.Entry {
	return buildLogEntry(ctx, subsystem, message, nil, errKind...)

// on how it is used.
func LogOnceIf(ctx context.Context, subsystem string, err error, id string, errKind ...interface{}) {
	if logIgnoreError(err) {
		return
	}
	logOnce.logOnceIf(ctx, subsystem, err, id, errKind...)
}

// LogOnceConsoleIf - similar to LogOnceIf but exclusively only logs to console target.
func LogOnceConsoleIf(ctx context.Context, subsystem string, err error, id string, errKind ...interface{}) {

			Description: DefaultComment,
			Optional:    true,
		},
	}
)

// DefaultHelpPostfix - Helper function to add (default: $value) messages in config help
func DefaultHelpPostfix(subsystem KVS, key string) string {
	val, found := subsystem.Lookup(key)
	if !found || val == "" {
		return ""
	}
	return " (default: '" + val + "')"

	"github.com/minio/pkg/v2/env"
)

// DefaultKVS default configuration values for ILM subsystem
var DefaultKVS = config.KVS{
	config.KV{
		Key:   transitionWorkers,
		Value: "100",
	},
	config.KV{
		Key:   expirationWorkers,
		Value: "100",
	},
}

// Config represents the different configuration values for ILM subsystem
type Config struct {
	TransitionWorkers int
	ExpirationWorkers int
}

	globalLifecycleSys = NewLifecycleSys()

	// Create new bucket encryption subsystem
	globalBucketSSEConfigSys = NewBucketSSEConfigSys()

	// Create new bucket object lock subsystem
	globalBucketObjectLockSys = NewBucketObjectLockSys()

	// Create new bucket quota subsystem
	globalBucketQuotaSys = NewBucketQuotaSys()

	// Create new bucket versioning subsystem
	if globalBucketVersioningSys == nil {

		Namespace: nodeMetricNamespace,
		Subsystem: ioSubsystem,
		Name:      writeBytes,
		Help:      "Total bytes written by the process to the underlying storage system, /proc/[pid]/io write_bytes",
		Type:      counterMetric,
	}
}

func getMinioProcessIOReadBytesMD() MetricDescription {
	return MetricDescription{
		Namespace: nodeMetricNamespace,
		Subsystem: ioSubsystem,
		Name:      readBytes,

		Namespace: nodeMetricNamespace,
		Subsystem: subSys,
		Name:      name,
		Help:      help,
		Type:      gaugeMetric,
	}
}

func getResourceMetrics() *MetricsGroupV2 {
	mg := &MetricsGroupV2{
		cacheInterval: resourceMetricsCacheInterval,
	}
	mg.RegisterRead(func(ctx context.Context) []MetricV2 {
		metrics := []MetricV2{}

package cmd

import (
	"strings"

	"github.com/minio/minio/internal/bucket/versioning"
	"github.com/minio/minio/internal/logger"
)

// BucketVersioningSys - policy subsystem.
type BucketVersioningSys struct{}

// Enabled enabled versioning?
func (sys *BucketVersioningSys) Enabled(bucket string) bool {
	vc, err := sys.Get(bucket)
	if err != nil {
		logger.CriticalIf(GlobalContext, err)