add _MINIO_SERVER_DEBUG env for enabling debug messages (#11128)

cmd/background-newdisks-heal-ops.go

@@ -25,6 +25,7 @@ import (
 
 	"github.com/dustin/go-humanize"
 	"github.com/minio/minio/cmd/logger"
+	"github.com/minio/minio/pkg/console"
 )
 
 const (
@@ -140,6 +141,10 @@ wait:
 				}
 			}
 
+			if serverDebugLog {
+				console.Debugf("disk check timer fired, attempting to heal %d drives\n", len(healDisks))
+			}
+
 			// heal only if new disks found.
 			for _, endpoint := range healDisks {
 				disk, format, err := connectEndpoint(endpoint)

cmd/common-main.go

@@ -30,6 +30,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/fatih/color"
 	dns2 "github.com/miekg/dns"
 	"github.com/minio/cli"
 	"github.com/minio/minio-go/v7/pkg/set"
@@ -38,9 +39,13 @@ import (
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/certs"
+	"github.com/minio/minio/pkg/console"
 	"github.com/minio/minio/pkg/env"
 )
 
+// serverDebugLog will enable debug printing
+var serverDebugLog = env.Get("_MINIO_SERVER_DEBUG", config.EnableOff) == config.EnableOn
+
 func init() {
 	logger.Init(GOPATH, GOROOT)
 	logger.RegisterError(config.FmtError)
@@ -53,6 +58,8 @@ func init() {
 	globalReplicationState = newReplicationState()
 	globalTransitionState = newTransitionState()
 
+	console.SetColor("Debug", color.New())
+
 	gob.Register(StorageErr(""))
 }
 

cmd/data-crawler.go

@@ -35,6 +35,7 @@ import (
 	"github.com/minio/minio/pkg/bucket/lifecycle"
 	"github.com/minio/minio/pkg/bucket/replication"
 	"github.com/minio/minio/pkg/color"
+	"github.com/minio/minio/pkg/console"
 	"github.com/minio/minio/pkg/env"
 	"github.com/minio/minio/pkg/event"
 	"github.com/minio/minio/pkg/hash"
@@ -110,6 +111,10 @@ func runDataCrawler(ctx context.Context, objAPI ObjectLayer) {
 			// Reset the timer for next cycle.
 			crawlTimer.Reset(dataCrawlStartDelay)
 
+			if intDataUpdateTracker.debug {
+				console.Debugln("starting crawler cycle")
+			}
+
 			// Wait before starting next cycle and wait on startup.
 			results := make(chan DataUsageInfo, 1)
 			go storeDataUsageInBackend(ctx, objAPI, results)

cmd/data-update-tracker.go

@@ -79,7 +79,7 @@ func newDataUpdateTracker() *dataUpdateTracker {
 		Current: dataUpdateFilter{
 			idx: 1,
 		},
-		debug:      env.Get(envDataUsageCrawlDebug, config.EnableOff) == config.EnableOn,
+		debug:      env.Get(envDataUsageCrawlDebug, config.EnableOff) == config.EnableOn || serverDebugLog,
 		input:      make(chan string, dataUpdateTrackerQueueSize),
 		save:       make(chan struct{}, 1),
 		saveExited: make(chan struct{}),

cmd/erasure-sets.go

@@ -34,6 +34,7 @@ import (
 	"github.com/minio/minio-go/v7/pkg/tags"
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/bpool"
+	"github.com/minio/minio/pkg/console"
 	"github.com/minio/minio/pkg/dsync"
 	"github.com/minio/minio/pkg/madmin"
 	"github.com/minio/minio/pkg/sync/errgroup"
@@ -281,6 +282,10 @@ func (s *erasureSets) monitorAndConnectEndpoints(ctx context.Context, monitorInt
 			// Reset the timer once fired for required interval.
 			monitor.Reset(monitorInterval)
 
+			if serverDebugLog {
+				console.Debugln("running disk monitoring")
+			}
+
 			s.connectDisks()
 		}
 	}

cmd/metacache-bucket.go

@@ -74,8 +74,8 @@ func newBucketMetacache(bucket string, cleanup bool) *bucketMetacache {
 }
 
 func (b *bucketMetacache) debugf(format string, data ...interface{}) {
-	if metacacheDebug {
-		console.Debugf(format, data...)
+	if serverDebugLog {
+		console.Debugf(format+"\n", data...)
 	}
 }
 

cmd/metacache-set.go

@@ -125,13 +125,13 @@ func (o listPathOptions) newMetacache() metacache {
 }
 
 func (o *listPathOptions) debugf(format string, data ...interface{}) {
-	if metacacheDebug {
+	if serverDebugLog {
 		console.Debugf(format, data...)
 	}
 }
 
 func (o *listPathOptions) debugln(data ...interface{}) {
-	if metacacheDebug {
+	if serverDebugLog {
 		console.Debugln(data...)
 	}
 }

cmd/metacache.go

@@ -46,9 +46,6 @@ const (
 	// Enabling this will make cache sharing more likely and cause less IO,
 	// but may cause additional latency to some calls.
 	metacacheSharePrefix = false
-
-	// metacacheDebug will enable debug printing
-	metacacheDebug = false
 )
 
 //go:generate msgp -file $GOFILE -unexported