Add everything back into one project hood, still missing iodine

pkg/storage/donut/management.go

@@ -0,0 +1,76 @@
+package donut
+
+import (
+	"encoding/json"
+	"errors"
+	"path"
+
+	"github.com/minio-io/iodine"
+)
+
+// Heal - heal a donut and fix bad data blocks
+func (d donut) Heal() error {
+	return errors.New("Not Implemented")
+}
+
+// Info - return info about donut configuration
+func (d donut) Info() (nodeDiskMap map[string][]string, err error) {
+	nodeDiskMap = make(map[string][]string)
+	for nodeName, node := range d.nodes {
+		disks, err := node.ListDisks()
+		if err != nil {
+			return nil, iodine.New(err, nil)
+		}
+		diskList := make([]string, len(disks))
+		for diskName, disk := range disks {
+			diskList[disk.GetOrder()] = diskName
+		}
+		nodeDiskMap[nodeName] = diskList
+	}
+	return nodeDiskMap, nil
+}
+
+// AttachNode - attach node
+func (d donut) AttachNode(node Node) error {
+	if node == nil {
+		return iodine.New(errors.New("invalid argument"), nil)
+	}
+	d.nodes[node.GetNodeName()] = node
+	return nil
+}
+
+// DetachNode - detach node
+func (d donut) DetachNode(node Node) error {
+	delete(d.nodes, node.GetNodeName())
+	return nil
+}
+
+// SaveConfig - save donut configuration
+func (d donut) SaveConfig() error {
+	nodeDiskMap := make(map[string][]string)
+	for hostname, node := range d.nodes {
+		disks, err := node.ListDisks()
+		if err != nil {
+			return iodine.New(err, nil)
+		}
+		for _, disk := range disks {
+			donutConfigPath := path.Join(d.name, donutConfig)
+			donutConfigWriter, err := disk.MakeFile(donutConfigPath)
+			defer donutConfigWriter.Close()
+			if err != nil {
+				return iodine.New(err, nil)
+			}
+			nodeDiskMap[hostname][disk.GetOrder()] = disk.GetPath()
+			jenc := json.NewEncoder(donutConfigWriter)
+			if err := jenc.Encode(nodeDiskMap); err != nil {
+				return iodine.New(err, nil)
+			}
+		}
+	}
+	return nil
+}
+
+// LoadConfig - load configuration
+func (d donut) LoadConfig() error {
+	return errors.New("Not Implemented")
+}