Use new simpler cc-metric-store API

metricdata/cc-metric-store.go

@@ -5,10 +5,8 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"net/http"
-	"strconv"
 	"time"
 
 	"github.com/ClusterCockpit/cc-jobarchive/config"
@@ -16,23 +14,30 @@ import (
 )
 
 type CCMetricStore struct {
-	jwt    string
-	url    string
-	client http.Client
+	jwt           string
+	url           string
+	queryEndpoint string
+	client        http.Client
 }
 
-type ApiRequestBody struct {
-	Metrics   []string   `json:"metrics"`
-	Selectors [][]string `json:"selectors"`
+type ApiQueryRequest struct {
+	Cluster     string     `json:"cluster"`
+	From        int64      `json:"from"`
+	To          int64      `json:"to"`
+	WithStats   bool       `json:"with-stats"`
+	WithData    bool       `json:"with-data"`
+	Queries     []ApiQuery `json:"queries"`
+	ForAllNodes []string   `json:"for-all-nodes"`
 }
 
 type ApiQuery struct {
-	Metric     string   `json:"metric"`
-	Hostname   string   `json:"hostname"`
-	Type       *string  `json:"type,omitempty"`
-	TypeIds    []string `json:"type-ids,omitempty"`
-	SubType    *string  `json:"subtype,omitempty"`
-	SubTypeIds []string `json:"subtype-ids,omitempty"`
+	Metric     string  `json:"metric"`
+	Hostname   string  `json:"host"`
+	Aggregate  bool    `json:"aggreg"`
+	Type       *string `json:"type,omitempty"`
+	TypeIds    []int   `json:"type-ids,omitempty"`
+	SubType    *string `json:"subtype,omitempty"`
+	SubTypeIds []int   `json:"subtype-ids,omitempty"`
 }
 
 type ApiMetricData struct {
@@ -45,18 +50,9 @@ type ApiMetricData struct {
 	Max   schema.Float   `json:"max"`
 }
 
-type ApiStatsData struct {
-	Error   *string      `json:"error"`
-	From    int64        `json:"from"`
-	To      int64        `json:"to"`
-	Samples int          `json:"samples"`
-	Avg     schema.Float `json:"avg"`
-	Min     schema.Float `json:"min"`
-	Max     schema.Float `json:"max"`
-}
-
 func (ccms *CCMetricStore) Init(url, token string) error {
 	ccms.url = url
+	ccms.queryEndpoint = fmt.Sprintf("%s/api/query", url)
 	ccms.jwt = token
 	ccms.client = http.Client{
 		Timeout: 5 * time.Second,
@@ -64,100 +60,67 @@ func (ccms *CCMetricStore) Init(url, token string) error {
 	return nil
 }
 
-func (ccms *CCMetricStore) doRequest(job *schema.Job, suffix string, metrics []string, ctx context.Context) (*http.Response, error) {
-	from, to := job.StartTime.Unix(), job.StartTime.Add(time.Duration(job.Duration)*time.Second).Unix()
-	reqBody := ApiRequestBody{}
-	reqBody.Metrics = metrics
-	for _, node := range job.Resources {
-		if node.Accelerators != nil || node.HWThreads != nil {
-			// TODO/FIXME:
-			return nil, errors.New("todo: cc-metric-store resources: Accelerator/HWThreads")
-		}
-
-		reqBody.Selectors = append(reqBody.Selectors, []string{job.Cluster, node.Hostname})
-	}
-
-	reqBodyBytes, err := json.Marshal(reqBody)
-	if err != nil {
+func (ccms *CCMetricStore) doRequest(ctx context.Context, body *ApiQueryRequest) ([][]ApiMetricData, error) {
+	buf := &bytes.Buffer{}
+	if err := json.NewEncoder(buf).Encode(body); err != nil {
 		return nil, err
 	}
 
-	req, err := http.NewRequestWithContext(ctx, http.MethodPost, fmt.Sprintf("%s/api/%d/%d/%s", ccms.url, from, to, suffix), bytes.NewReader(reqBodyBytes))
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, ccms.queryEndpoint, buf)
 	if err != nil {
 		return nil, err
 	}
 	if ccms.jwt != "" {
 		req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", ccms.jwt))
 	}
-	return ccms.client.Do(req)
+
+	res, err := ccms.client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	if res.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("'%s': HTTP Status: %s", ccms.queryEndpoint, res.Status)
+	}
+
+	var resBody [][]ApiMetricData
+	if err := json.NewDecoder(bufio.NewReader(res.Body)).Decode(&resBody); err != nil {
+		return nil, err
+	}
+
+	return resBody, nil
 }
 
 func (ccms *CCMetricStore) LoadData(job *schema.Job, metrics []string, scopes []schema.MetricScope, ctx context.Context) (schema.JobData, error) {
-	type ApiQueryRequest struct {
-		Cluster string     `json:"cluster"`
-		From    int64      `json:"from"`
-		To      int64      `json:"to"`
-		Queries []ApiQuery `json:"queries"`
-	}
-
-	type ApiQueryResponse struct {
-		ApiMetricData
-		Query *ApiQuery `json:"query"`
-	}
-
 	queries, assignedScope, err := ccms.buildQueries(job, metrics, scopes)
 	if err != nil {
 		return nil, err
 	}
 
-	reqBody := ApiQueryRequest{
-		Cluster: job.Cluster,
-		From:    job.StartTime.Unix(),
-		To:      job.StartTime.Add(time.Duration(job.Duration) * time.Second).Unix(),
-		Queries: queries,
+	req := ApiQueryRequest{
+		Cluster:   job.Cluster,
+		From:      job.StartTime.Unix(),
+		To:        job.StartTime.Add(time.Duration(job.Duration) * time.Second).Unix(),
+		Queries:   queries,
+		WithStats: true,
+		WithData:  true,
 	}
 
-	buf := &bytes.Buffer{}
-	if err := json.NewEncoder(buf).Encode(reqBody); err != nil {
-		return nil, err
-	}
-
-	req, err := http.NewRequestWithContext(ctx, http.MethodPost, ccms.url+"/api/query", buf)
+	resBody, err := ccms.doRequest(ctx, &req)
 	if err != nil {
 		return nil, err
 	}
-	if ccms.jwt != "" {
-		req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", ccms.jwt))
-	}
-	res, err := ccms.client.Do(req)
-	if err != nil {
-		return nil, err
-	}
-	if res.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("cc-metric-store replied with: %s", res.Status)
-	}
-
-	var resBody []ApiQueryResponse
-	if err := json.NewDecoder(bufio.NewReader(res.Body)).Decode(&resBody); err != nil {
-		return nil, err
-	}
-
-	// log.Printf("response: %#v", resBody)
 
 	var jobData schema.JobData = make(schema.JobData)
-	for i, res := range resBody {
-		metric := res.Query.Metric
-		if _, ok := jobData[metric]; !ok {
-			jobData[metric] = make(map[schema.MetricScope]*schema.JobMetric)
-		}
-
-		if res.Error != nil {
-			return nil, fmt.Errorf("cc-metric-store error while fetching %s: %s", metric, *res.Error)
-		}
-
+	for i, row := range resBody {
+		query := req.Queries[i]
 		scope := assignedScope[i]
-		mc := config.GetMetricConfig(job.Cluster, metric)
-		jobMetric, ok := jobData[metric][scope]
+		mc := config.GetMetricConfig(job.Cluster, query.Metric)
+		if _, ok := jobData[query.Metric]; !ok {
+			jobData[query.Metric] = make(map[schema.MetricScope]*schema.JobMetric)
+		}
+
+		jobMetric, ok := jobData[query.Metric][scope]
 		if !ok {
 			jobMetric = &schema.JobMetric{
 				Unit:     mc.Unit,
@@ -165,41 +128,47 @@ func (ccms *CCMetricStore) LoadData(job *schema.Job, metrics []string, scopes []
 				Timestep: mc.Timestep,
 				Series:   make([]schema.Series, 0),
 			}
-			jobData[metric][scope] = jobMetric
+			jobData[query.Metric][scope] = jobMetric
 		}
 
-		id := (*int)(nil)
-		if res.Query.Type != nil {
-			id = new(int)
-			*id, _ = strconv.Atoi(res.Query.TypeIds[0])
-		}
+		for _, res := range row {
+			if res.Error != nil {
+				return nil, fmt.Errorf("cc-metric-store error while fetching %s: %s", query.Metric, *res.Error)
+			}
 
-		if res.Avg.IsNaN() || res.Min.IsNaN() || res.Max.IsNaN() {
-			// TODO: use schema.Float instead of float64?
-			// This is done because regular float64 can not be JSONed when NaN.
-			res.Avg = schema.Float(0)
-			res.Min = schema.Float(0)
-			res.Max = schema.Float(0)
-		}
+			id := (*int)(nil)
+			if query.Type != nil {
+				id = new(int)
+				*id = query.TypeIds[0]
+			}
 
-		jobMetric.Series = append(jobMetric.Series, schema.Series{
-			Hostname: res.Query.Hostname,
-			Id:       id,
-			Statistics: &schema.MetricStatistics{
-				Avg: float64(res.Avg),
-				Min: float64(res.Min),
-				Max: float64(res.Max),
-			},
-			Data: res.Data,
-		})
+			if res.Avg.IsNaN() || res.Min.IsNaN() || res.Max.IsNaN() {
+				// TODO: use schema.Float instead of float64?
+				// This is done because regular float64 can not be JSONed when NaN.
+				res.Avg = schema.Float(0)
+				res.Min = schema.Float(0)
+				res.Max = schema.Float(0)
+			}
+
+			jobMetric.Series = append(jobMetric.Series, schema.Series{
+				Hostname: query.Hostname,
+				Id:       id,
+				Statistics: &schema.MetricStatistics{
+					Avg: float64(res.Avg),
+					Min: float64(res.Min),
+					Max: float64(res.Max),
+				},
+				Data: res.Data,
+			})
+		}
 	}
 
 	return jobData, nil
 }
 
 var (
-	hwthreadString = string("cpu") // TODO/FIXME: inconsistency between cc-metric-collector and ClusterCockpit
-	// coreString        = string(schema.MetricScopeCore)
+	hwthreadString    = string("cpu") // TODO/FIXME: inconsistency between cc-metric-collector and ClusterCockpit
+	coreString        = string(schema.MetricScopeCore)
 	socketString      = string(schema.MetricScopeSocket)
 	acceleratorString = string(schema.MetricScopeAccelerator)
 )
@@ -239,15 +208,14 @@ func (ccms *CCMetricStore) buildQueries(job *schema.Job, metrics []string, scope
 
 				// Accelerator -> Accelerator (Use "accelerator" scope if requested scope is lower than node)
 				if nativeScope == schema.MetricScopeAccelerator && scope.LT(schema.MetricScopeNode) {
-					for _, accel := range host.Accelerators {
-						queries = append(queries, ApiQuery{
-							Metric:   metric,
-							Hostname: host.Hostname,
-							Type:     &acceleratorString,
-							TypeIds:  []string{strconv.Itoa(accel)},
-						})
-						assignedScope = append(assignedScope, schema.MetricScopeAccelerator)
-					}
+					queries = append(queries, ApiQuery{
+						Metric:    metric,
+						Hostname:  host.Hostname,
+						Aggregate: false,
+						Type:      &acceleratorString,
+						TypeIds:   host.Accelerators,
+					})
+					assignedScope = append(assignedScope, schema.MetricScopeAccelerator)
 					continue
 				}
 
@@ -258,26 +226,26 @@ func (ccms *CCMetricStore) buildQueries(job *schema.Job, metrics []string, scope
 					}
 
 					queries = append(queries, ApiQuery{
-						Metric:   metric,
-						Hostname: host.Hostname,
-						Type:     &acceleratorString,
-						TypeIds:  toStringSlice(host.Accelerators),
+						Metric:    metric,
+						Hostname:  host.Hostname,
+						Aggregate: true,
+						Type:      &acceleratorString,
+						TypeIds:   host.Accelerators,
 					})
-					assignedScope = append(assignedScope, schema.MetricScopeNode)
+					assignedScope = append(assignedScope, scope)
 					continue
 				}
 
 				// HWThread -> HWThead
 				if nativeScope == schema.MetricScopeHWThread && scope == schema.MetricScopeHWThread {
-					for _, hwthread := range hwthreads {
-						queries = append(queries, ApiQuery{
-							Metric:   metric,
-							Hostname: host.Hostname,
-							Type:     &hwthreadString,
-							TypeIds:  []string{strconv.Itoa(hwthread)},
-						})
-						assignedScope = append(assignedScope, schema.MetricScopeHWThread)
-					}
+					queries = append(queries, ApiQuery{
+						Metric:    metric,
+						Hostname:  host.Hostname,
+						Aggregate: false,
+						Type:      &hwthreadString,
+						TypeIds:   hwthreads,
+					})
+					assignedScope = append(assignedScope, scope)
 					continue
 				}
 
@@ -286,12 +254,13 @@ func (ccms *CCMetricStore) buildQueries(job *schema.Job, metrics []string, scope
 					cores, _ := topology.GetCoresFromHWThreads(hwthreads)
 					for _, core := range cores {
 						queries = append(queries, ApiQuery{
-							Metric:   metric,
-							Hostname: host.Hostname,
-							Type:     &hwthreadString,
-							TypeIds:  toStringSlice(topology.Core[core]),
+							Metric:    metric,
+							Hostname:  host.Hostname,
+							Aggregate: true,
+							Type:      &hwthreadString,
+							TypeIds:   topology.Core[core],
 						})
-						assignedScope = append(assignedScope, schema.MetricScopeCore)
+						assignedScope = append(assignedScope, scope)
 					}
 					continue
 				}
@@ -301,12 +270,13 @@ func (ccms *CCMetricStore) buildQueries(job *schema.Job, metrics []string, scope
 					sockets, _ := topology.GetSocketsFromHWThreads(hwthreads)
 					for _, socket := range sockets {
 						queries = append(queries, ApiQuery{
-							Metric:   metric,
-							Hostname: host.Hostname,
-							Type:     &hwthreadString,
-							TypeIds:  toStringSlice(topology.Socket[socket]),
+							Metric:    metric,
+							Hostname:  host.Hostname,
+							Aggregate: true,
+							Type:      &hwthreadString,
+							TypeIds:   topology.Socket[socket],
 						})
-						assignedScope = append(assignedScope, schema.MetricScopeSocket)
+						assignedScope = append(assignedScope, scope)
 					}
 					continue
 				}
@@ -314,27 +284,55 @@ func (ccms *CCMetricStore) buildQueries(job *schema.Job, metrics []string, scope
 				// HWThread -> Node
 				if nativeScope == schema.MetricScopeHWThread && scope == schema.MetricScopeNode {
 					queries = append(queries, ApiQuery{
-						Metric:   metric,
-						Hostname: host.Hostname,
-						Type:     &hwthreadString,
-						TypeIds:  toStringSlice(hwthreads),
+						Metric:    metric,
+						Hostname:  host.Hostname,
+						Aggregate: true,
+						Type:      &hwthreadString,
+						TypeIds:   hwthreads,
 					})
-					assignedScope = append(assignedScope, schema.MetricScopeNode)
+					assignedScope = append(assignedScope, scope)
+					continue
+				}
+
+				// Core -> Core
+				if nativeScope == schema.MetricScopeCore && scope == schema.MetricScopeCore {
+					cores, _ := topology.GetCoresFromHWThreads(hwthreads)
+					queries = append(queries, ApiQuery{
+						Metric:    metric,
+						Hostname:  host.Hostname,
+						Aggregate: false,
+						Type:      &coreString,
+						TypeIds:   cores,
+					})
+					assignedScope = append(assignedScope, scope)
+					continue
+				}
+
+				// Core -> Node
+				if nativeScope == schema.MetricScopeCore && scope == schema.MetricScopeNode {
+					cores, _ := topology.GetCoresFromHWThreads(hwthreads)
+					queries = append(queries, ApiQuery{
+						Metric:    metric,
+						Hostname:  host.Hostname,
+						Aggregate: true,
+						Type:      &coreString,
+						TypeIds:   cores,
+					})
+					assignedScope = append(assignedScope, scope)
 					continue
 				}
 
 				// Socket -> Socket
 				if nativeScope == schema.MetricScopeSocket && scope == schema.MetricScopeSocket {
 					sockets, _ := topology.GetSocketsFromHWThreads(hwthreads)
-					for _, socket := range sockets {
-						queries = append(queries, ApiQuery{
-							Metric:   metric,
-							Hostname: host.Hostname,
-							Type:     &acceleratorString,
-							TypeIds:  []string{strconv.Itoa(socket)},
-						})
-						assignedScope = append(assignedScope, schema.MetricScopeSocket)
-					}
+					queries = append(queries, ApiQuery{
+						Metric:    metric,
+						Hostname:  host.Hostname,
+						Aggregate: false,
+						Type:      &socketString,
+						TypeIds:   sockets,
+					})
+					assignedScope = append(assignedScope, scope)
 					continue
 				}
 
@@ -342,12 +340,13 @@ func (ccms *CCMetricStore) buildQueries(job *schema.Job, metrics []string, scope
 				if nativeScope == schema.MetricScopeSocket && scope == schema.MetricScopeNode {
 					sockets, _ := topology.GetSocketsFromHWThreads(hwthreads)
 					queries = append(queries, ApiQuery{
-						Metric:   metric,
-						Hostname: host.Hostname,
-						Type:     &socketString,
-						TypeIds:  toStringSlice(sockets),
+						Metric:    metric,
+						Hostname:  host.Hostname,
+						Aggregate: true,
+						Type:      &socketString,
+						TypeIds:   sockets,
 					})
-					assignedScope = append(assignedScope, schema.MetricScopeNode)
+					assignedScope = append(assignedScope, scope)
 					continue
 				}
 
@@ -357,7 +356,7 @@ func (ccms *CCMetricStore) buildQueries(job *schema.Job, metrics []string, scope
 						Metric:   metric,
 						Hostname: host.Hostname,
 					})
-					assignedScope = append(assignedScope, schema.MetricScopeNode)
+					assignedScope = append(assignedScope, scope)
 					continue
 				}
 
@@ -369,121 +368,96 @@ func (ccms *CCMetricStore) buildQueries(job *schema.Job, metrics []string, scope
 	return queries, assignedScope, nil
 }
 
-func toStringSlice(s []int) []string {
-	ret := make([]string, len(s))
-	for i, val := range s {
-		ret[i] = strconv.Itoa(val)
-	}
-	return ret
-}
-
 func (ccms *CCMetricStore) LoadStats(job *schema.Job, metrics []string, ctx context.Context) (map[string]map[string]schema.MetricStatistics, error) {
-	res, err := ccms.doRequest(job, "stats", metrics, ctx)
+	queries, _, err := ccms.buildQueries(job, metrics, []schema.MetricScope{schema.MetricScopeNode})
 	if err != nil {
 		return nil, err
 	}
 
-	resdata := make([]map[string]ApiStatsData, 0, len(job.Resources))
-	if err := json.NewDecoder(res.Body).Decode(&resdata); err != nil {
+	req := ApiQueryRequest{
+		Cluster:   job.Cluster,
+		From:      job.StartTime.Unix(),
+		To:        job.StartTime.Add(time.Duration(job.Duration) * time.Second).Unix(),
+		Queries:   queries,
+		WithStats: true,
+		WithData:  false,
+	}
+
+	resBody, err := ccms.doRequest(ctx, &req)
+	if err != nil {
 		return nil, err
 	}
 
-	stats := map[string]map[string]schema.MetricStatistics{}
-	for _, metric := range metrics {
-		nodestats := map[string]schema.MetricStatistics{}
-		for i, node := range job.Resources {
-			if node.Accelerators != nil || node.HWThreads != nil {
-				// TODO/FIXME:
-				return nil, errors.New("todo: cc-metric-store resources: Accelerator/HWThreads")
-			}
-
-			data := resdata[i][metric]
-			if data.Error != nil {
-				return nil, errors.New(*data.Error)
-			}
-
-			if data.Samples == 0 {
-				return nil, fmt.Errorf("no data for node '%s' and metric '%s'", node.Hostname, metric)
-			}
-
-			nodestats[node.Hostname] = schema.MetricStatistics{
-				Avg: float64(data.Avg),
-				Min: float64(data.Min),
-				Max: float64(data.Max),
-			}
+	stats := make(map[string]map[string]schema.MetricStatistics, len(metrics))
+	for i, res := range resBody {
+		query := req.Queries[i]
+		data := res[0]
+		if data.Error != nil {
+			return nil, fmt.Errorf("fetching %s for node %s failed: %s", query.Metric, query.Hostname, *data.Error)
 		}
 
-		stats[metric] = nodestats
+		metricdata, ok := stats[query.Metric]
+		if !ok {
+			metricdata = make(map[string]schema.MetricStatistics, job.NumNodes)
+			stats[query.Metric] = metricdata
+		}
+
+		if data.Avg.IsNaN() || data.Min.IsNaN() || data.Max.IsNaN() {
+			return nil, fmt.Errorf("fetching %s for node %s failed: %s", query.Metric, query.Hostname, "avg/min/max is NaN")
+		}
+
+		metricdata[query.Hostname] = schema.MetricStatistics{
+			Avg: float64(data.Avg),
+			Min: float64(data.Min),
+			Max: float64(data.Max),
+		}
 	}
 
 	return stats, nil
 }
 
 func (ccms *CCMetricStore) LoadNodeData(clusterId string, metrics, nodes []string, from, to int64, ctx context.Context) (map[string]map[string][]schema.Float, error) {
-	reqBody := ApiRequestBody{}
-	reqBody.Metrics = metrics
-	for _, node := range nodes {
-		reqBody.Selectors = append(reqBody.Selectors, []string{clusterId, node})
+	req := ApiQueryRequest{
+		Cluster:   clusterId,
+		From:      from,
+		To:        to,
+		WithStats: false,
+		WithData:  true,
 	}
 
-	reqBodyBytes, err := json.Marshal(reqBody)
-	if err != nil {
-		return nil, err
-	}
-
-	var req *http.Request
 	if nodes == nil {
-		req, err = http.NewRequestWithContext(ctx, http.MethodPost, fmt.Sprintf("%s/api/%s/%d/%d/all-nodes", ccms.url, clusterId, from, to), bytes.NewReader(reqBodyBytes))
+		req.ForAllNodes = metrics
 	} else {
-		req, err = http.NewRequestWithContext(ctx, http.MethodPost, fmt.Sprintf("%s/api/%d/%d/timeseries", ccms.url, from, to), bytes.NewReader(reqBodyBytes))
+		for _, node := range nodes {
+			for _, metric := range metrics {
+				req.Queries = append(req.Queries, ApiQuery{
+					Hostname: node,
+					Metric:   metric,
+				})
+			}
+		}
 	}
-	if err != nil {
-		return nil, err
-	}
-	if ccms.jwt != "" {
-		req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", ccms.jwt))
-	}
-	res, err := ccms.client.Do(req)
+
+	resBody, err := ccms.doRequest(ctx, &req)
 	if err != nil {
 		return nil, err
 	}
 
-	data := map[string]map[string][]schema.Float{}
-	if nodes == nil {
-		resdata := map[string]map[string]ApiMetricData{}
-		if err := json.NewDecoder(res.Body).Decode(&resdata); err != nil {
-			return nil, err
+	data := make(map[string]map[string][]schema.Float)
+	for i, res := range resBody {
+		query := req.Queries[i]
+		qdata := res[0]
+		if qdata.Error != nil {
+			return nil, fmt.Errorf("fetching %s for node %s failed: %s", query.Metric, query.Hostname, *qdata.Error)
 		}
 
-		for node, metrics := range resdata {
-			nodedata := map[string][]schema.Float{}
-			for metric, data := range metrics {
-				if data.Error != nil {
-					return nil, errors.New(*data.Error)
-				}
-
-				nodedata[metric] = data.Data
-			}
-			data[node] = nodedata
-		}
-	} else {
-		resdata := make([]map[string]ApiMetricData, 0, len(nodes))
-		if err := json.NewDecoder(res.Body).Decode(&resdata); err != nil {
-			return nil, err
+		nodedata, ok := data[query.Hostname]
+		if !ok {
+			nodedata = make(map[string][]schema.Float)
+			data[query.Hostname] = nodedata
 		}
 
-		for i, node := range nodes {
-			metricsData := map[string][]schema.Float{}
-			for metric, data := range resdata[i] {
-				if data.Error != nil {
-					return nil, errors.New(*data.Error)
-				}
-
-				metricsData[metric] = data.Data
-			}
-
-			data[node] = metricsData
-		}
+		nodedata[query.Metric] = qdata.Data
 	}
 
 	return data, nil