fix: byHost realTime metrics API (#17681)

cmd/metrics-realtime.go

@@ -19,6 +19,7 @@ package cmd
 
 import (
 	"context"
+	"net/http"
 	"time"
 
 	"github.com/minio/madmin-go/v3"
@@ -38,8 +39,14 @@ func collectLocalMetrics(types madmin.MetricType, opts collectMetricsOpts) (m ma
 		return
 	}
 
+	byHostName := globalMinioAddr
 	if len(opts.hosts) > 0 {
-		if _, ok := opts.hosts[globalMinioAddr]; !ok {
+		server := getLocalServerProperty(globalEndpoints, &http.Request{
+			Host: globalLocalNodeName,
+		})
+		if _, ok := opts.hosts[server.Endpoint]; ok {
+			byHostName = server.Endpoint
+		} else {
 			return
 		}
 	}
@@ -85,8 +92,8 @@ func collectLocalMetrics(types madmin.MetricType, opts collectMetricsOpts) (m ma
 	// Add types...
 
 	// ByHost is a shallow reference, so careful about sharing.
-	m.ByHost = map[string]madmin.Metrics{globalMinioAddr: m.Aggregated}
-	m.Hosts = append(m.Hosts, globalMinioAddr)
+	m.ByHost = map[string]madmin.Metrics{byHostName: m.Aggregated}
+	m.Hosts = append(m.Hosts, byHostName)
 
 	return m
 }

cmd/peer-rest-client.go

@@ -214,6 +214,9 @@ func (client *peerRESTClient) GetMetrics(ctx context.Context, t madmin.MetricTyp
 	for disk := range opts.disks {
 		values.Set(peerRESTDisk, disk)
 	}
+	for host := range opts.hosts {
+		values.Add(peerRESTHost, host)
+	}
 	values.Set(peerRESTJobID, opts.jobID)
 	values.Set(peerRESTDepID, opts.depID)
 

cmd/peer-rest-common.go

@@ -99,6 +99,7 @@ const (
 	peerRESTStorageClass   = "storage-class"
 	peerRESTMetricsTypes   = "types"
 	peerRESTDisk           = "disk"
+	peerRESTHost           = "host"
 	peerRESTJobID          = "job-id"
 	peerRESTDepID          = "depID"
 	peerRESTStartRebalance = "start-rebalance"

cmd/peer-rest-server.go

@@ -453,6 +453,12 @@ func (s *peerRESTServer) GetMetricsHandler(w http.ResponseWriter, r *http.Reques
 	for _, disk := range r.Form[peerRESTDisk] {
 		diskMap[disk] = struct{}{}
 	}
+
+	hostMap := make(map[string]struct{})
+	for _, host := range r.Form[peerRESTHost] {
+		hostMap[host] = struct{}{}
+	}
+
 	jobID := r.Form.Get(peerRESTJobID)
 	depID := r.Form.Get(peerRESTDepID)
 
@@ -461,6 +467,7 @@ func (s *peerRESTServer) GetMetricsHandler(w http.ResponseWriter, r *http.Reques
 
 	info := collectLocalMetrics(types, collectMetricsOpts{
 		disks: diskMap,
+		hosts: hostMap,
 		jobID: jobID,
 		depID: depID,
 	})