Quit initializing disks process when term signal is invoked (#3163)

cmd/prepare-storage.go

@@ -17,6 +17,7 @@
 package cmd
 
 import (
+	"errors"
 	"net/url"
 	"time"
 
@@ -204,7 +205,10 @@ func retryFormattingDisks(firstDisk bool, endpoints []*url.URL, storageDisks []S
 	defer close(doneCh)
 
 	// Wait on the jitter retry loop.
-	for retryCounter := range newRetryTimer(time.Second, time.Second*30, MaxJitter, doneCh) {
+	retryTimerCh := newRetryTimer(time.Second, time.Second*30, MaxJitter, doneCh)
+	for {
+		select {
+		case retryCounter := <-retryTimerCh:
 			// Attempt to load all `format.json`.
 			formatConfigs, sErrs := loadAllFormats(storageDisks)
 			if retryCounter > 5 {
@@ -259,8 +263,10 @@ func retryFormattingDisks(firstDisk bool, endpoints []*url.URL, storageDisks []S
 				return genericFormatCheck(formatConfigs, sErrs)
 			} // else initialize the format for FS.
 			return initFormatFS(storageDisks[0])
-	} // Return here.
-	return nil
+		case <-globalServiceDoneCh:
+			return errors.New("Initializing data volumes gracefully stopped.")
+		}
+	}
 }
 
 // Initialize storage disks based on input arguments.