Add erasure info support (#2446)

Make it easier for user to see backend properties like backend-type,
Standard storage class Parity and Reduced Redundancy storage class
Parity
Co-authored-by: Prakash Senthil Vel <23444145+prakashsvmx@users.noreply.github.com>

restapi/admin_info.go

@@ -61,6 +61,7 @@ type UsageInfo struct {
 	DisksUsage       int64
 	Servers          []*models.ServerProperties
 	EndpointNotReady bool
+	Backend          *models.BackendProperties
 }
 
 // GetAdminInfo invokes admin info and returns a parsed `UsageInfo` structure
@@ -72,6 +73,25 @@ func GetAdminInfo(ctx context.Context, client MinioAdmin) (*UsageInfo, error) {
 	// we are trimming uint64 to int64 this will report an incorrect measurement for numbers greater than
 	// 9,223,372,036,854,775,807
 
+	var backendType string
+	var rrSCParity float64
+	var standardSCParity float64
+
+	if v, success := serverInfo.Backend.(map[string]interface{}); success {
+		bt, ok := v["backendType"]
+		if ok {
+			backendType = bt.(string)
+		}
+		rp, ok := v["rrSCParity"]
+		if ok {
+			rrSCParity = rp.(float64)
+		}
+		sp, ok := v["standardSCParity"]
+		if ok {
+			standardSCParity = sp.(float64)
+		}
+	}
+
 	var usedSpace int64
 	for _, serv := range serverInfo.Servers {
 		for _, disk := range serv.Disks {
@@ -113,12 +133,19 @@ func GetAdminInfo(ctx context.Context, client MinioAdmin) (*UsageInfo, error) {
 		serverArray = append(serverArray, newServer)
 	}
 
+	backendData := &models.BackendProperties{
+		BackendType:      backendType,
+		RrSCParity:       int64(rrSCParity),
+		StandardSCParity: int64(standardSCParity),
+	}
+
 	return &UsageInfo{
 		Buckets:    int64(serverInfo.Buckets.Count),
 		Objects:    int64(serverInfo.Objects.Count),
 		Usage:      int64(serverInfo.Usage.Size),
 		DisksUsage: usedSpace,
 		Servers:    serverArray,
+		Backend:    backendData,
 	}, nil
 }
 
@@ -913,6 +940,7 @@ func getUsageWidgetsForDeployment(ctx context.Context, prometheusURL string, mAd
 			sessionResp.Objects = usage.Objects
 			sessionResp.Usage = usage.Usage
 			sessionResp.Servers = usage.Servers
+			sessionResp.Backend = usage.Backend
 		}
 	}()
 

restapi/embedded_spec.go

@@ -4864,6 +4864,20 @@ func init() {
     }
   },
   "definitions": {
+    "BackendProperties": {
+      "type": "object",
+      "properties": {
+        "backendType": {
+          "type": "string"
+        },
+        "rrSCParity": {
+          "type": "integer"
+        },
+        "standardSCParity": {
+          "type": "integer"
+        }
+      }
+    },
     "SubnetRegTokenResponse": {
       "type": "object",
       "properties": {
@@ -5129,6 +5143,9 @@ func init() {
             "unavailable"
           ]
         },
+        "backend": {
+          "$ref": "#/definitions/BackendProperties"
+        },
         "buckets": {
           "type": "integer"
         },
@@ -13002,6 +13019,20 @@ func init() {
     }
   },
   "definitions": {
+    "BackendProperties": {
+      "type": "object",
+      "properties": {
+        "backendType": {
+          "type": "string"
+        },
+        "rrSCParity": {
+          "type": "integer"
+        },
+        "standardSCParity": {
+          "type": "integer"
+        }
+      }
+    },
     "BucketDetails": {
       "type": "object",
       "properties": {
@@ -13393,6 +13424,9 @@ func init() {
             "unavailable"
           ]
         },
+        "backend": {
+          "$ref": "#/definitions/BackendProperties"
+        },
         "buckets": {
           "type": "integer"
         },