Handle removal of disks - getObject() now reads if disks are missing underneath, add initial stub healing code

pkg/donut/heal.go

@@ -0,0 +1,26 @@
+package donut
+
+import (
+	"fmt"
+
+	"github.com/minio/minio/pkg/iodine"
+)
+
+// Heal heal an existing donut
+func (donut API) Heal() error {
+	missingDisks := make(map[int]struct{})
+	for _, node := range donut.nodes {
+		disks, err := node.ListDisks()
+		if err != nil {
+			return iodine.New(err, nil)
+		}
+		for i, disk := range disks {
+			dirs, err := disk.ListDir(donut.config.DonutName)
+			if err != nil {
+				missingDisks[i] = struct{}{}
+			}
+			fmt.Println(dirs)
+		}
+	}
+	return nil
+}