monitoring: some bug fix

Signed-off-by: Nhuanggze <loganhuang@yunify.com>

pkg/kapis/monitoring/v1alpha3/helper.go

@@ -235,22 +235,33 @@ func (h handler) makeQueryOptions(r reqParams, lvl monitoring.Level) (q queryOpt
 		if err != nil {
 			return q, err
 		}
-
 		cts := ns.CreationTimestamp.Time
-		if q.start.Before(cts) {
-			q.start = cts
-		}
-		if q.end.Before(cts) {
-			return q, errors.New(ErrNoHit)
+
+		// Query should happen no earlier than namespace's creation time.
+		// For range query, check and mutate `start`. For instant query, check and mutate `time`.
+		// In range query, if `start` and `end` are both before namespace's creation time, it causes no hit.
+		if !q.isRangeQuery() {
+			if q.time.Before(cts) {
+				q.time = cts
+			}
+		} else {
+			if q.start.Before(cts) {
+				q.start = cts
+			}
+			if q.end.Before(cts) {
+				return q, errors.New(ErrNoHit)
+			}
 		}
+
 	}
 
 	// Parse sorting and paging params
 	if r.target != "" {
+		q.target = r.target
 		q.page = DefaultPage
 		q.limit = DefaultLimit
-		if q.order != model.OrderAscending {
-			r.order = DefaultOrder
+		if r.order != model.OrderAscending {
+			q.order = DefaultOrder
 		}
 		if r.page != "" {
 			q.page, err = strconv.Atoi(r.page)

pkg/kapis/monitoring/v1alpha3/helper_test.go

@@ -2,12 +2,12 @@ package v1alpha3
 
 import (
 	"fmt"
+	"github.com/google/go-cmp/cmp"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes/fake"
 	model "kubesphere.io/kubesphere/pkg/models/monitoring"
 	"kubesphere.io/kubesphere/pkg/simple/client/monitoring"
-	"reflect"
 	"testing"
 	"time"
 )
@@ -100,6 +100,32 @@ func TestParseRequestParams(t *testing.T) {
 			},
 			expectedErr: false,
 		},
+		{
+			params: reqParams{
+				time:          "1585830000",
+				namespaceName: "default",
+			},
+			lvl: monitoring.LevelNamespace,
+			namespace: corev1.Namespace{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: "default",
+					CreationTimestamp: metav1.Time{
+						Time: time.Unix(1585836666, 0),
+					},
+				},
+			},
+			expected: queryOptions{
+				time:         time.Unix(1585836666, 0),
+				identifier:   model.IdentifierNamespace,
+				metricFilter: ".*",
+				namedMetrics: model.NamespaceMetrics,
+				option: monitoring.NamespaceOption{
+					ResourceFilter: ".*",
+					NamespaceName:  "default",
+				},
+			},
+			expectedErr: false,
+		},
 		{
 			params: reqParams{
 				start:         "1585830000",
@@ -151,6 +177,33 @@ func TestParseRequestParams(t *testing.T) {
 			},
 			expectedErr: false,
 		},
+		{
+			params: reqParams{
+				time:          "1585830000",
+				workspaceName: "system-workspace",
+				metricFilter:  "namespace_memory_usage_wo_cache|namespace_memory_limit_hard|namespace_cpu_usage",
+				page:          "1",
+				limit:         "10",
+				order:         "desc",
+				target:        "namespace_cpu_usage",
+			},
+			lvl: monitoring.LevelNamespace,
+			expected: queryOptions{
+				time:         time.Unix(1585830000, 0),
+				metricFilter: "namespace_memory_usage_wo_cache|namespace_memory_limit_hard|namespace_cpu_usage",
+				namedMetrics: model.NamespaceMetrics,
+				option: monitoring.NamespaceOption{
+					ResourceFilter: ".*",
+					WorkspaceName:  "system-workspace",
+				},
+				target:     "namespace_cpu_usage",
+				identifier: "namespace",
+				order:      "desc",
+				page:       1,
+				limit:      10,
+			},
+			expectedErr: false,
+		},
 	}
 
 	for i, tt := range tests {
@@ -170,8 +223,8 @@ func TestParseRequestParams(t *testing.T) {
 				t.Fatalf("failed to catch error.")
 			}
 
-			if !reflect.DeepEqual(result, tt.expected) {
-				t.Fatalf("unexpected return: %v.", result)
+			if diff := cmp.Diff(result, tt.expected, cmp.AllowUnexported(result, tt.expected)); diff != "" {
+				t.Fatalf("%T differ (-got, +want): %s", tt.expected, diff)
 			}
 		})
 	}

pkg/models/monitoring/expressions/prometheus/label_replace.go → pkg/models/monitoring/expressions/prometheus.go

-package prometheus
+package expressions
 
 import (
 	"fmt"
 	"github.com/prometheus/common/model"
 	"github.com/prometheus/prometheus/promql"
 	"github.com/prometheus/prometheus/storage/metric"
-	"kubesphere.io/kubesphere/pkg/models/monitoring/expressions"
 )
 
 func init() {
-	expressions.Register("prometheus", labelReplace)
+	register("prometheus", labelReplace)
 }
 
 func labelReplace(input, ns string) (string, error) {
@@ -18,7 +17,7 @@ func labelReplace(input, ns string) (string, error) {
 		return "", err
 	}
 
-	SetRecursive(root, ns)
+	setRecursive(root, ns)
 	if err != nil {
 		return "", err
 	}
@@ -27,39 +26,39 @@ func labelReplace(input, ns string) (string, error) {
 }
 
 // Inspired by https://github.com/openshift/prom-label-proxy
-func SetRecursive(node promql.Node, namespace string) (err error) {
+func setRecursive(node promql.Node, namespace string) (err error) {
 	switch n := node.(type) {
 	case *promql.EvalStmt:
-		if err := SetRecursive(n.Expr, namespace); err != nil {
+		if err := setRecursive(n.Expr, namespace); err != nil {
 			return err
 		}
 	case promql.Expressions:
 		for _, e := range n {
-			if err := SetRecursive(e, namespace); err != nil {
+			if err := setRecursive(e, namespace); err != nil {
 				return err
 			}
 		}
 	case *promql.AggregateExpr:
-		if err := SetRecursive(n.Expr, namespace); err != nil {
+		if err := setRecursive(n.Expr, namespace); err != nil {
 			return err
 		}
 	case *promql.BinaryExpr:
-		if err := SetRecursive(n.LHS, namespace); err != nil {
+		if err := setRecursive(n.LHS, namespace); err != nil {
 			return err
 		}
-		if err := SetRecursive(n.RHS, namespace); err != nil {
+		if err := setRecursive(n.RHS, namespace); err != nil {
 			return err
 		}
 	case *promql.Call:
-		if err := SetRecursive(n.Args, namespace); err != nil {
+		if err := setRecursive(n.Args, namespace); err != nil {
 			return err
 		}
 	case *promql.ParenExpr:
-		if err := SetRecursive(n.Expr, namespace); err != nil {
+		if err := setRecursive(n.Expr, namespace); err != nil {
 			return err
 		}
 	case *promql.UnaryExpr:
-		if err := SetRecursive(n.Expr, namespace); err != nil {
+		if err := setRecursive(n.Expr, namespace); err != nil {
 			return err
 		}
 	case *promql.NumberLiteral, *promql.StringLiteral:

pkg/models/monitoring/expressions/prometheus/label_replace_test.go → pkg/models/monitoring/expressions/prometheus_test.go

-package prometheus
+package expressions
 
 import (
 	"fmt"

pkg/models/monitoring/expressions/registry.go

@@ -4,6 +4,6 @@ type labelReplaceFn func(expr, ns string) (string, error)
 
 var ReplaceNamespaceFns = make(map[string]labelReplaceFn)
 
-func Register(name string, fn labelReplaceFn) {
+func register(name string, fn labelReplaceFn) {
 	ReplaceNamespaceFns[name] = fn
 }

pkg/models/monitoring/sort_page_test.go

@@ -10,21 +10,52 @@ import (
 
 func TestSort(t *testing.T) {
 	tests := []struct {
-		name       string
 		target     string
 		order      string
 		identifier string
-		source     string
+		raw        string
 		expected   string
 	}{
-		{"sort in ascending order", "node_cpu_utilisation", "asc", "node", "source-node-metrics.json", "sorted-node-metrics-asc.json"},
-		{"sort in descending order", "node_memory_utilisation", "desc", "node", "source-node-metrics.json", "sorted-node-metrics-desc.json"},
-		{"sort faulty metrics", "node_memory_utilisation", "desc", "node", "faulty-node-metrics.json", "faulty-node-metrics-sorted.json"},
-		{"sort metrics with an blank node", "node_memory_utilisation", "desc", "node", "blank-node-metrics.json", "blank-node-metrics-sorted.json"},
+		{
+			target:     "node_cpu_utilisation",
+			order:      "asc",
+			identifier: "node",
+			raw:        "source-node-metrics.json",
+			expected:   "sorted-node-metrics-asc.json",
+		},
+		{
+			target:     "node_memory_utilisation",
+			order:      "desc",
+			identifier: "node",
+			raw:        "source-node-metrics.json",
+			expected:   "sorted-node-metrics-desc.json",
+		},
+		{
+			target:     "node_memory_utilisation",
+			order:      "desc",
+			identifier: "node",
+			raw:        "faulty-node-metrics.json",
+			expected:   "faulty-node-metrics-sorted.json",
+		},
+		{
+			target:     "node_memory_utilisation",
+			order:      "desc",
+			identifier: "node",
+			raw:        "blank-node-metrics.json",
+			expected:   "blank-node-metrics-sorted.json",
+		},
+		{
+			target:     "node_memory_utilisation",
+			order:      "desc",
+			identifier: "node",
+			raw:        "null-node-metrics.json",
+			expected:   "null-node-metrics-sorted.json",
+		},
 	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			source, expected, err := jsonFromFile(tt.source, tt.expected)
+
+	for i, tt := range tests {
+		t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
+			source, expected, err := jsonFromFile(tt.raw, tt.expected)
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -39,21 +70,46 @@ func TestSort(t *testing.T) {
 
 func TestPage(t *testing.T) {
 	tests := []struct {
-		name     string
 		page     int
 		limit    int
-		source   string
+		raw      string
 		expected string
 	}{
-		{"page 0 limit 5", 0, 5, "sorted-node-metrics-asc.json", "sorted-node-metrics-asc.json"},
-		{"page 1 limit 5", 1, 5, "sorted-node-metrics-asc.json", "paged-node-metrics-1.json"},
-		{"page 2 limit 5", 2, 5, "sorted-node-metrics-asc.json", "paged-node-metrics-2.json"},
-		{"page 3 limit 5", 3, 5, "sorted-node-metrics-asc.json", "paged-node-metrics-3.json"},
-		{"page faulty metrics", 1, 2, "faulty-node-metrics-sorted.json", "faulty-node-metrics-paged.json"},
+		{
+			page:     0,
+			limit:    5,
+			raw:      "sorted-node-metrics-asc.json",
+			expected: "sorted-node-metrics-asc.json",
+		},
+		{
+			page:     1,
+			limit:    5,
+			raw:      "sorted-node-metrics-asc.json",
+			expected: "paged-node-metrics-1.json",
+		},
+		{
+			page:     2,
+			limit:    5,
+			raw:      "sorted-node-metrics-asc.json",
+			expected: "paged-node-metrics-2.json",
+		},
+		{
+			page:     3,
+			limit:    5,
+			raw:      "sorted-node-metrics-asc.json",
+			expected: "paged-node-metrics-3.json",
+		},
+		{
+			page:     1,
+			limit:    2,
+			raw:      "faulty-node-metrics-sorted.json",
+			expected: "faulty-node-metrics-paged.json",
+		},
 	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			source, expected, err := jsonFromFile(tt.source, tt.expected)
+
+	for i, tt := range tests {
+		t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
+			source, expected, err := jsonFromFile(tt.raw, tt.expected)
 			if err != nil {
 				t.Fatal(err)
 			}

pkg/models/monitoring/testdata/null-node-metrics-sorted.json

+{
+  "results": [
+    {
+      "metric_name": "node_disk_size_utilisation",
+      "data": {
+        "resultType": "vector",
+        "result": [
+          {},
+          {},
+          {}
+        ]
+      }
+    },
+    {
+      "metric_name": "node_memory_utilisation",
+      "data": {
+        "resultType": "vector",
+        "result": [
+          {
+            "metric": {
+              "node": "i-2dazc1d6"
+            },
+            "value": [
+              1585658599.195,
+              0.5286875837861773
+            ]
+          },
+          {
+            "metric": {
+              "node": "i-hgcoippu"
+            },
+            "value": [
+              1585658599.195,
+              0.2497060264216553
+            ]
+          },
+          {
+            "metric": {
+              "node": "i-ezjb7gsk"
+            },
+            "value": [
+              1585658599.195,
+              0.23637090535053928
+            ]
+          }
+        ]
+      }
+    }
+  ],
+  "page": 1,
+  "total_page": 1,
+  "total_item": 3
+}
\ No newline at end of file

pkg/models/monitoring/testdata/null-node-metrics.json

+{
+  "results": [
+    {
+      "metric_name": "node_disk_size_utilisation",
+      "data": {
+        "resultType": "vector"
+      }
+    },
+    {
+      "metric_name": "node_memory_utilisation",
+      "data": {
+        "resultType": "vector",
+        "result": [
+          {
+            "metric": {
+              "node": "i-2dazc1d6"
+            },
+            "value": [
+              1585658599.195,
+              0.5286875837861773
+            ]
+          },
+          {
+            "metric": {
+              "node": "i-ezjb7gsk"
+            },
+            "value": [
+              1585658599.195,
+              0.23637090535053928
+            ]
+          },
+          {
+            "metric": {
+              "node": "i-hgcoippu"
+            },
+            "value": [
+              1585658599.195,
+              0.2497060264216553
+            ]
+          }
+        ]
+      }
+    }
+  ]
+}
\ No newline at end of file

pkg/simple/client/monitoring/prometheus/prometheus.go

@@ -138,13 +138,20 @@ func (p prometheus) GetMetadata(namespace string) []monitoring.Metadata {
 		return meta
 	}
 
+	// Deduplication
+	set := make(map[string]bool)
 	for _, item := range items {
-		meta = append(meta, monitoring.Metadata{
-			Metric: item.Metric,
-			Type:   string(item.Type),
-			Help:   item.Help,
-		})
+		_, ok := set[item.Metric]
+		if !ok {
+			set[item.Metric] = true
+			meta = append(meta, monitoring.Metadata{
+				Metric: item.Metric,
+				Type:   string(item.Type),
+				Help:   item.Help,
+			})
+		}
 	}
+
 	return meta
 }
 
@@ -186,7 +193,7 @@ func parseQueryResp(value model.Value) monitoring.MetricData {
 			mv.Metadata[string(k)] = string(v)
 		}
 
-		mv.Sample = monitoring.Point{float64(v.Timestamp) / 1000, float64(v.Value)}
+		mv.Sample = &monitoring.Point{float64(v.Timestamp) / 1000, float64(v.Value)}
 
 		res.MetricValues = append(res.MetricValues, mv)
 	}

pkg/simple/client/monitoring/prometheus/prometheus_test.go

@@ -14,16 +14,21 @@ import (
 
 func TestGetNamedMetrics(t *testing.T) {
 	tests := []struct {
-		name     string
 		fakeResp string
 		expected string
 	}{
-		{"prom returns good values", "metrics-vector-type-prom.json", "metrics-vector-type-res.json"},
-		{"prom returns error", "metrics-error-prom.json", "metrics-error-res.json"},
+		{
+			fakeResp: "metrics-vector-type-prom.json",
+			expected: "metrics-vector-type-res.json",
+		},
+		{
+			fakeResp: "metrics-error-prom.json",
+			expected: "metrics-error-res.json",
+		},
 	}
 
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
+	for i, tt := range tests {
+		t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
 			expected := make([]monitoring.Metric, 0)
 			err := jsonFromFile(tt.expected, &expected)
 			if err != nil {
@@ -44,16 +49,21 @@ func TestGetNamedMetrics(t *testing.T) {
 
 func TestGetNamedMetricsOverTime(t *testing.T) {
 	tests := []struct {
-		name     string
 		fakeResp string
 		expected string
 	}{
-		{"prom returns good values", "metrics-matrix-type-prom.json", "metrics-matrix-type-res.json"},
-		{"prom returns error", "metrics-error-prom.json", "metrics-error-res.json"},
+		{
+			fakeResp: "metrics-matrix-type-prom.json",
+			expected: "metrics-matrix-type-res.json",
+		},
+		{
+			fakeResp: "metrics-error-prom.json",
+			expected: "metrics-error-res.json",
+		},
 	}
 
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
+	for i, tt := range tests {
+		t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
 			expected := make([]monitoring.Metric, 0)
 			err := jsonFromFile(tt.expected, &expected)
 			if err != nil {

pkg/simple/client/monitoring/prometheus/promql.go

@@ -114,8 +114,8 @@ var promQLTemplates = map[string]string{
 	"workspace_cpu_usage":                  `round(sum by (label_kubesphere_io_workspace) (namespace:container_cpu_usage_seconds_total:sum_rate{namespace!="", $1}), 0.001)`,
 	"workspace_memory_usage":               `sum by (label_kubesphere_io_workspace) (namespace:container_memory_usage_bytes:sum{namespace!="", $1})`,
 	"workspace_memory_usage_wo_cache":      `sum by (label_kubesphere_io_workspace) (namespace:container_memory_usage_bytes_wo_cache:sum{namespace!="", $1})`,
-	"workspace_net_bytes_transmitted":      `sum by (label_kubesphere_io_workspace) (sum by (namespace) (irate(container_network_transmit_bytes_total{namespace!="", pod_name!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m])) * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
-	"workspace_net_bytes_received":         `sum by (label_kubesphere_io_workspace) (sum by (namespace) (irate(container_network_receive_bytes_total{namespace!="", pod_name!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m])) * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
+	"workspace_net_bytes_transmitted":      `sum by (label_kubesphere_io_workspace) (sum by (namespace) (irate(container_network_transmit_bytes_total{namespace!="", pod!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m])) * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
+	"workspace_net_bytes_received":         `sum by (label_kubesphere_io_workspace) (sum by (namespace) (irate(container_network_receive_bytes_total{namespace!="", pod!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m])) * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
 	"workspace_pod_count":                  `sum by (label_kubesphere_io_workspace) (kube_pod_status_phase{phase!~"Failed|Succeeded", namespace!=""} * on (namespace) group_left(label_kubesphere_io_workspace)(kube_namespace_labels{$1}))`,
 	"workspace_pod_running_count":          `sum by (label_kubesphere_io_workspace) (kube_pod_status_phase{phase="Running", namespace!=""} * on (namespace) group_left(label_kubesphere_io_workspace)(kube_namespace_labels{$1}))`,
 	"workspace_pod_succeeded_count":        `sum by (label_kubesphere_io_workspace) (kube_pod_status_phase{phase="Succeeded", namespace!=""} * on (namespace) group_left(label_kubesphere_io_workspace)(kube_namespace_labels{$1}))`,
@@ -138,8 +138,8 @@ var promQLTemplates = map[string]string{
 	"namespace_cpu_usage":                  `round(namespace:container_cpu_usage_seconds_total:sum_rate{namespace!="", $1}, 0.001)`,
 	"namespace_memory_usage":               `namespace:container_memory_usage_bytes:sum{namespace!="", $1}`,
 	"namespace_memory_usage_wo_cache":      `namespace:container_memory_usage_bytes_wo_cache:sum{namespace!="", $1}`,
-	"namespace_net_bytes_transmitted":      `sum by (namespace) (irate(container_network_transmit_bytes_total{namespace!="", pod_name!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m]) * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
-	"namespace_net_bytes_received":         `sum by (namespace) (irate(container_network_receive_bytes_total{namespace!="", pod_name!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m]) * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
+	"namespace_net_bytes_transmitted":      `sum by (namespace) (irate(container_network_transmit_bytes_total{namespace!="", pod!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m]) * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
+	"namespace_net_bytes_received":         `sum by (namespace) (irate(container_network_receive_bytes_total{namespace!="", pod!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m]) * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
 	"namespace_pod_count":                  `sum by (namespace) (kube_pod_status_phase{phase!~"Failed|Succeeded", namespace!=""} * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
 	"namespace_pod_running_count":          `sum by (namespace) (kube_pod_status_phase{phase="Running", namespace!=""} * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
 	"namespace_pod_succeeded_count":        `sum by (namespace) (kube_pod_status_phase{phase="Succeeded", namespace!=""} * on (namespace) group_left(label_kubesphere_io_workspace) kube_namespace_labels{$1})`,
@@ -181,16 +181,16 @@ var promQLTemplates = map[string]string{
 	"workload_statefulset_unavailable_replicas_ratio": `namespace:statefulset_unavailable_replicas:ratio{$1}`,
 
 	// pod
-	"pod_cpu_usage":             `round(label_join(sum by (namespace, pod_name) (irate(container_cpu_usage_seconds_total{job="kubelet", pod_name!="", image!=""}[5m])), "pod", "", "pod_name") * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{$1} * on (namespace, pod) group_left(node) kube_pod_info{$2}, 0.001)`,
-	"pod_memory_usage":          `label_join(sum by (namespace, pod_name) (container_memory_usage_bytes{job="kubelet", pod_name!="", image!=""}), "pod", "", "pod_name") * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{$1} * on (namespace, pod) group_left(node) kube_pod_info{$2}`,
-	"pod_memory_usage_wo_cache": `label_join(sum by (namespace, pod_name) (container_memory_working_set_bytes{job="kubelet", pod_name!="", image!=""}), "pod", "", "pod_name") * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{$1} * on (namespace, pod) group_left(node) kube_pod_info{$2}`,
-	"pod_net_bytes_transmitted": `label_join(sum by (namespace, pod_name) (irate(container_network_transmit_bytes_total{pod_name!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m])), "pod", "", "pod_name") * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{$1} * on (namespace, pod) group_left(node) kube_pod_info{$2}`,
-	"pod_net_bytes_received":    `label_join(sum by (namespace, pod_name) (irate(container_network_receive_bytes_total{pod_name!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m])), "pod", "", "pod_name") * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{$1} * on (namespace, pod) group_left(node) kube_pod_info{$2}`,
+	"pod_cpu_usage":             `round(sum by (namespace, pod) (irate(container_cpu_usage_seconds_total{job="kubelet", pod!="", image!=""}[5m])) * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{$1} * on (namespace, pod) group_left(node) kube_pod_info{$2}, 0.001)`,
+	"pod_memory_usage":          `sum by (namespace, pod) (container_memory_usage_bytes{job="kubelet", pod!="", image!=""}) * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{$1} * on (namespace, pod) group_left(node) kube_pod_info{$2}`,
+	"pod_memory_usage_wo_cache": `sum by (namespace, pod) (container_memory_working_set_bytes{job="kubelet", pod!="", image!=""}) * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{$1} * on (namespace, pod) group_left(node) kube_pod_info{$2}`,
+	"pod_net_bytes_transmitted": `sum by (namespace, pod) (irate(container_network_transmit_bytes_total{pod!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m])) * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{$1} * on (namespace, pod) group_left(node) kube_pod_info{$2}`,
+	"pod_net_bytes_received":    `sum by (namespace, pod) (irate(container_network_receive_bytes_total{pod!="", interface!~"^(cali.+|tunl.+|dummy.+|kube.+|flannel.+|cni.+|docker.+|veth.+|lo.*)", job="kubelet"}[5m])) * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{$1} * on (namespace, pod) group_left(node) kube_pod_info{$2}`,
 
 	// container
-	"container_cpu_usage":             `round(sum by (namespace, pod_name, container_name) (irate(container_cpu_usage_seconds_total{job="kubelet", container_name!="POD", container_name!="", image!="", $1}[5m])), 0.001)`,
-	"container_memory_usage":          `sum by (namespace, pod_name, container_name) (container_memory_usage_bytes{job="kubelet", container_name!="POD", container_name!="", image!="", $1})`,
-	"container_memory_usage_wo_cache": `sum by (namespace, pod_name, container_name) (container_memory_working_set_bytes{job="kubelet", container_name!="POD", container_name!="", image!="", $1})`,
+	"container_cpu_usage":             `round(sum by (namespace, pod, container) (irate(container_cpu_usage_seconds_total{job="kubelet", container!="POD", container!="", image!="", $1}[5m])), 0.001)`,
+	"container_memory_usage":          `sum by (namespace, pod, container) (container_memory_usage_bytes{job="kubelet", container!="POD", container!="", image!="", $1})`,
+	"container_memory_usage_wo_cache": `sum by (namespace, pod, container) (container_memory_working_set_bytes{job="kubelet", container!="POD", container!="", image!="", $1})`,
 
 	// pvc
 	"pvc_inodes_available":   `max by (namespace, persistentvolumeclaim) (kubelet_volume_stats_inodes_free) * on (namespace, persistentvolumeclaim) group_left (storageclass) kube_persistentvolumeclaim_info{$1}`,
@@ -255,25 +255,25 @@ var promQLTemplates = map[string]string{
 	"prometheus_tsdb_head_samples_appended_rate": `prometheus:prometheus_tsdb_head_samples_appended:sum_rate`,
 }
 
-func makeExpr(metric string, opt monitoring.QueryOptions) string {
+func makeExpr(metric string, opts monitoring.QueryOptions) string {
 	tmpl := promQLTemplates[metric]
-	switch opt.Level {
+	switch opts.Level {
 	case monitoring.LevelCluster:
 		return tmpl
 	case monitoring.LevelNode:
-		return makeNodeMetricExpr(tmpl, opt)
+		return makeNodeMetricExpr(tmpl, opts)
 	case monitoring.LevelWorkspace:
-		return makeWorkspaceMetricExpr(tmpl, opt)
+		return makeWorkspaceMetricExpr(tmpl, opts)
 	case monitoring.LevelNamespace:
-		return makeNamespaceMetricExpr(tmpl, opt)
+		return makeNamespaceMetricExpr(tmpl, opts)
 	case monitoring.LevelWorkload:
-		return makeWorkloadMetricExpr(tmpl, opt)
+		return makeWorkloadMetricExpr(metric, tmpl, opts)
 	case monitoring.LevelPod:
-		return makePodMetricExpr(tmpl, opt)
+		return makePodMetricExpr(tmpl, opts)
 	case monitoring.LevelContainer:
-		return makeContainerMetricExpr(tmpl, opt)
+		return makeContainerMetricExpr(tmpl, opts)
 	case monitoring.LevelPVC:
-		return makePVCMetricExpr(tmpl, opt)
+		return makePVCMetricExpr(tmpl, opts)
 	case monitoring.LevelComponent:
 		return tmpl
 	default:
@@ -322,23 +322,31 @@ func makeNamespaceMetricExpr(tmpl string, o monitoring.QueryOptions) string {
 	return strings.Replace(tmpl, "$1", namespaceSelector, -1)
 }
 
-func makeWorkloadMetricExpr(tmpl string, o monitoring.QueryOptions) string {
+func makeWorkloadMetricExpr(metric, tmpl string, o monitoring.QueryOptions) string {
 	var kindSelector, workloadSelector string
+
 	switch o.WorkloadKind {
 	case "deployment":
 		o.WorkloadKind = Deployment
-		kindSelector = fmt.Sprintf(`namespace="%s", deployment!="", deployment=~"%s"`, o.NamespaceName, o.ResourceFilter)
 	case "statefulset":
 		o.WorkloadKind = StatefulSet
-		kindSelector = fmt.Sprintf(`namespace="%s", statefulset!="", statefulset=~"%s"`, o.NamespaceName, o.ResourceFilter)
 	case "daemonset":
 		o.WorkloadKind = DaemonSet
-		kindSelector = fmt.Sprintf(`namespace="%s", daemonset!="", daemonset=~"%s"`, o.NamespaceName, o.ResourceFilter)
 	default:
 		o.WorkloadKind = ".*"
-		kindSelector = fmt.Sprintf(`namespace="%s"`, o.NamespaceName)
 	}
 	workloadSelector = fmt.Sprintf(`namespace="%s", workload=~"%s:%s"`, o.NamespaceName, o.WorkloadKind, o.ResourceFilter)
+
+	if strings.Contains(metric, "deployment") {
+		kindSelector = fmt.Sprintf(`namespace="%s", deployment!="", deployment=~"%s"`, o.NamespaceName, o.ResourceFilter)
+	}
+	if strings.Contains(metric, "statefulset") {
+		kindSelector = fmt.Sprintf(`namespace="%s", statefulset!="", statefulset=~"%s"`, o.NamespaceName, o.ResourceFilter)
+	}
+	if strings.Contains(metric, "daemonset") {
+		kindSelector = fmt.Sprintf(`namespace="%s", daemonset!="", daemonset=~"%s"`, o.NamespaceName, o.ResourceFilter)
+	}
+
 	return strings.NewReplacer("$1", workloadSelector, "$2", kindSelector).Replace(tmpl)
 }
 
@@ -350,11 +358,11 @@ func makePodMetricExpr(tmpl string, o monitoring.QueryOptions) string {
 	if o.WorkloadName != "" {
 		switch o.WorkloadKind {
 		case "deployment":
-			workloadSelector = fmt.Sprintf(`owner_kind="ReplicaSet", owner_name=~"^%s-[^-]{1,10}$"`, o.WorkloadKind)
+			workloadSelector = fmt.Sprintf(`owner_kind="ReplicaSet", owner_name=~"^%s-[^-]{1,10}$"`, o.WorkloadName)
 		case "statefulset":
-			workloadSelector = fmt.Sprintf(`owner_kind="StatefulSet", owner_name="%s"`, o.WorkloadKind)
+			workloadSelector = fmt.Sprintf(`owner_kind="StatefulSet", owner_name="%s"`, o.WorkloadName)
 		case "daemonset":
-			workloadSelector = fmt.Sprintf(`owner_kind="DaemonSet", owner_name="%s"`, o.WorkloadKind)
+			workloadSelector = fmt.Sprintf(`owner_kind="DaemonSet", owner_name="%s"`, o.WorkloadName)
 		}
 	}
 
@@ -385,9 +393,9 @@ func makePodMetricExpr(tmpl string, o monitoring.QueryOptions) string {
 func makeContainerMetricExpr(tmpl string, o monitoring.QueryOptions) string {
 	var containerSelector string
 	if o.ContainerName != "" {
-		containerSelector = fmt.Sprintf(`pod_name="%s", namespace="%s", container_name="%s"`, o.PodName, o.NamespaceName, o.ContainerName)
+		containerSelector = fmt.Sprintf(`pod="%s", namespace="%s", container="%s"`, o.PodName, o.NamespaceName, o.ContainerName)
 	} else {
-		containerSelector = fmt.Sprintf(`pod_name="%s", namespace="%s", container_name=~"%s"`, o.PodName, o.NamespaceName, o.ResourceFilter)
+		containerSelector = fmt.Sprintf(`pod="%s", namespace="%s", container=~"%s"`, o.PodName, o.NamespaceName, o.ResourceFilter)
 	}
 	return strings.Replace(tmpl, "$1", containerSelector, -1)
 }

pkg/simple/client/monitoring/prometheus/promql_test.go

@@ -10,33 +10,162 @@ import (
 func TestMakeExpr(t *testing.T) {
 	tests := []struct {
 		name string
-		opt  monitoring.QueryOptions
+		opts monitoring.QueryOptions
 	}{
-		{"cluster_cpu_utilisation", monitoring.QueryOptions{Level: monitoring.LevelCluster}},
-		{"node_cpu_utilisation", monitoring.QueryOptions{Level: monitoring.LevelNode, NodeName: "i-2dazc1d6"}},
-		{"node_cpu_total", monitoring.QueryOptions{Level: monitoring.LevelNode, ResourceFilter: "i-2dazc1d6|i-ezjb7gsk"}},
-		{"workspace_cpu_usage", monitoring.QueryOptions{Level: monitoring.LevelWorkspace, WorkspaceName: "system-workspace"}},
-		{"workspace_memory_usage", monitoring.QueryOptions{Level: monitoring.LevelWorkspace, ResourceFilter: "system-workspace|demo"}},
-		{"namespace_cpu_usage", monitoring.QueryOptions{Level: monitoring.LevelNamespace, NamespaceName: "kube-system"}},
-		{"namespace_memory_usage", monitoring.QueryOptions{Level: monitoring.LevelNamespace, ResourceFilter: "kube-system|default"}},
-		{"namespace_memory_usage_wo_cache", monitoring.QueryOptions{Level: monitoring.LevelNamespace, WorkspaceName: "system-workspace", ResourceFilter: "kube-system|default"}},
-		{"workload_cpu_usage", monitoring.QueryOptions{Level: monitoring.LevelWorkload, WorkloadKind: "deployment", NamespaceName: "default", ResourceFilter: "apiserver|coredns"}},
-		{"workload_deployment_replica_available", monitoring.QueryOptions{Level: monitoring.LevelWorkload, WorkloadKind: ".*", NamespaceName: "default", ResourceFilter: "apiserver|coredns"}},
-		{"pod_cpu_usage", monitoring.QueryOptions{Level: monitoring.LevelPod, NamespaceName: "default", WorkloadKind: "deployment", WorkloadName: "elasticsearch", ResourceFilter: "elasticsearch-0"}},
-		{"pod_memory_usage", monitoring.QueryOptions{Level: monitoring.LevelPod, NamespaceName: "default", PodName: "elasticsearch-12345"}},
-		{"pod_memory_usage_wo_cache", monitoring.QueryOptions{Level: monitoring.LevelPod, NodeName: "i-2dazc1d6", PodName: "elasticsearch-12345"}},
-		{"container_cpu_usage", monitoring.QueryOptions{Level: monitoring.LevelContainer, NamespaceName: "default", PodName: "elasticsearch-12345", ContainerName: "syscall"}},
-		{"container_memory_usage", monitoring.QueryOptions{Level: monitoring.LevelContainer, NamespaceName: "default", PodName: "elasticsearch-12345", ResourceFilter: "syscall"}},
-		{"pvc_inodes_available", monitoring.QueryOptions{Level: monitoring.LevelPVC, NamespaceName: "default", PersistentVolumeClaimName: "db-123"}},
-		{"pvc_inodes_used", monitoring.QueryOptions{Level: monitoring.LevelPVC, NamespaceName: "default", ResourceFilter: "db-123"}},
-		{"pvc_inodes_total", monitoring.QueryOptions{Level: monitoring.LevelPVC, StorageClassName: "default", ResourceFilter: "db-123"}},
-		{"etcd_server_list", monitoring.QueryOptions{Level: monitoring.LevelComponent}},
+		{
+			name: "cluster_cpu_utilisation",
+			opts: monitoring.QueryOptions{
+				Level: monitoring.LevelCluster,
+			},
+		},
+		{
+			name: "node_cpu_utilisation",
+			opts: monitoring.QueryOptions{
+				Level:    monitoring.LevelNode,
+				NodeName: "i-2dazc1d6",
+			},
+		},
+		{
+			name: "node_cpu_total",
+			opts: monitoring.QueryOptions{
+				Level:          monitoring.LevelNode,
+				ResourceFilter: "i-2dazc1d6|i-ezjb7gsk",
+			},
+		},
+		{
+			name: "workspace_cpu_usage",
+			opts: monitoring.QueryOptions{
+				Level:         monitoring.LevelWorkspace,
+				WorkspaceName: "system-workspace",
+			},
+		},
+		{
+			name: "workspace_memory_usage",
+			opts: monitoring.QueryOptions{
+				Level:          monitoring.LevelWorkspace,
+				ResourceFilter: "system-workspace|demo",
+			},
+		},
+		{
+			name: "namespace_cpu_usage",
+			opts: monitoring.QueryOptions{
+				Level:         monitoring.LevelNamespace,
+				NamespaceName: "kube-system",
+			},
+		},
+		{
+			name: "namespace_memory_usage",
+			opts: monitoring.QueryOptions{
+				Level:          monitoring.LevelNamespace,
+				ResourceFilter: "kube-system|default",
+			},
+		},
+		{
+			name: "namespace_memory_usage_wo_cache",
+			opts: monitoring.QueryOptions{
+				Level:          monitoring.LevelNamespace,
+				WorkspaceName:  "system-workspace",
+				ResourceFilter: "kube-system|default",
+			},
+		},
+		{
+			name: "workload_cpu_usage",
+			opts: monitoring.QueryOptions{
+				Level:          monitoring.LevelWorkload,
+				WorkloadKind:   "deployment",
+				NamespaceName:  "default",
+				ResourceFilter: "apiserver|coredns",
+			},
+		},
+		{
+			name: "workload_deployment_replica_available",
+			opts: monitoring.QueryOptions{
+				Level:          monitoring.LevelWorkload,
+				WorkloadKind:   ".*",
+				NamespaceName:  "default",
+				ResourceFilter: "apiserver|coredns",
+			},
+		},
+		{
+			name: "pod_cpu_usage",
+			opts: monitoring.QueryOptions{
+				Level:          monitoring.LevelPod,
+				NamespaceName:  "default",
+				WorkloadKind:   "deployment",
+				WorkloadName:   "elasticsearch",
+				ResourceFilter: "elasticsearch-0",
+			},
+		},
+		{
+			name: "pod_memory_usage",
+			opts: monitoring.QueryOptions{
+				Level:         monitoring.LevelPod,
+				NamespaceName: "default",
+				PodName:       "elasticsearch-12345",
+			},
+		},
+		{
+			name: "pod_memory_usage_wo_cache",
+			opts: monitoring.QueryOptions{
+				Level:    monitoring.LevelPod,
+				NodeName: "i-2dazc1d6",
+				PodName:  "elasticsearch-12345",
+			},
+		},
+		{
+			name: "container_cpu_usage",
+			opts: monitoring.QueryOptions{
+				Level:         monitoring.LevelContainer,
+				NamespaceName: "default",
+				PodName:       "elasticsearch-12345",
+				ContainerName: "syscall",
+			},
+		},
+		{
+			name: "container_memory_usage",
+			opts: monitoring.QueryOptions{
+				Level:          monitoring.LevelContainer,
+				NamespaceName:  "default",
+				PodName:        "elasticsearch-12345",
+				ResourceFilter: "syscall",
+			},
+		},
+		{
+			name: "pvc_inodes_available",
+			opts: monitoring.QueryOptions{
+				Level:                     monitoring.LevelPVC,
+				NamespaceName:             "default",
+				PersistentVolumeClaimName: "db-123",
+			},
+		},
+		{
+			name: "pvc_inodes_used",
+			opts: monitoring.QueryOptions{
+				Level:          monitoring.LevelPVC,
+				NamespaceName:  "default",
+				ResourceFilter: "db-123",
+			},
+		},
+		{
+			name: "pvc_inodes_total",
+			opts: monitoring.QueryOptions{
+				Level:            monitoring.LevelPVC,
+				StorageClassName: "default",
+				ResourceFilter:   "db-123",
+			},
+		},
+		{
+			name: "etcd_server_list",
+			opts: monitoring.QueryOptions{
+				Level: monitoring.LevelComponent,
+			},
+		},
 	}
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			expected := testdata.PromQLs[tt.name]
-			result := makeExpr(tt.name, tt.opt)
+			result := makeExpr(tt.name, tt.opts)
 			if diff := cmp.Diff(result, expected); diff != "" {
 				t.Fatalf("%T differ (-got, +want): %s", expected, diff)
 			}

pkg/simple/client/monitoring/prometheus/testdata/metadata-prom.json

@@ -11,6 +11,16 @@
       "help": "The total number of ZooKeeper failures.",
       "unit": ""
     },
+    {
+      "target": {
+        "instance": "127.0.0.1:9090",
+        "job": "prometheus"
+      },
+      "metric": "prometheus_tsdb_reloads_total",
+      "type": "counter",
+      "help": "Number of times the database reloaded block data from disk.",
+      "unit": ""
+    },
     {
       "target": {
         "instance": "127.0.0.1:9090",

pkg/simple/client/monitoring/prometheus/testdata/promqls.go

@@ -10,12 +10,12 @@ var PromQLs = map[string]string{
 	"namespace_memory_usage":                `namespace:container_memory_usage_bytes:sum{namespace!="", namespace=~"kube-system|default"}`,
 	"namespace_memory_usage_wo_cache":       `namespace:container_memory_usage_bytes_wo_cache:sum{namespace!="", label_kubesphere_io_workspace="system-workspace", namespace=~"kube-system|default"}`,
 	"workload_cpu_usage":                    `round(namespace:workload_cpu_usage:sum{namespace="default", workload=~"Deployment:apiserver|coredns"}, 0.001)`,
-	"workload_deployment_replica_available": `label_join(sum (label_join(label_replace(kube_deployment_status_replicas_available{namespace="default"}, "owner_kind", "Deployment", "", ""), "workload", "", "deployment")) by (namespace, owner_kind, workload), "workload", ":", "owner_kind", "workload")`,
-	"pod_cpu_usage":                         `round(label_join(sum by (namespace, pod_name) (irate(container_cpu_usage_seconds_total{job="kubelet", pod_name!="", image!=""}[5m])), "pod", "", "pod_name") * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{owner_kind="ReplicaSet", owner_name=~"^deployment-[^-]{1,10}$"} * on (namespace, pod) group_left(node) kube_pod_info{pod=~"elasticsearch-0", namespace="default"}, 0.001)`,
-	"pod_memory_usage":                      `label_join(sum by (namespace, pod_name) (container_memory_usage_bytes{job="kubelet", pod_name!="", image!=""}), "pod", "", "pod_name") * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{} * on (namespace, pod) group_left(node) kube_pod_info{pod="elasticsearch-12345", namespace="default"}`,
-	"pod_memory_usage_wo_cache":             `label_join(sum by (namespace, pod_name) (container_memory_working_set_bytes{job="kubelet", pod_name!="", image!=""}), "pod", "", "pod_name") * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{} * on (namespace, pod) group_left(node) kube_pod_info{pod="elasticsearch-12345", node="i-2dazc1d6"}`,
-	"container_cpu_usage":                   `round(sum by (namespace, pod_name, container_name) (irate(container_cpu_usage_seconds_total{job="kubelet", container_name!="POD", container_name!="", image!="", pod_name="elasticsearch-12345", namespace="default", container_name="syscall"}[5m])), 0.001)`,
-	"container_memory_usage":                `sum by (namespace, pod_name, container_name) (container_memory_usage_bytes{job="kubelet", container_name!="POD", container_name!="", image!="", pod_name="elasticsearch-12345", namespace="default", container_name=~"syscall"})`,
+	"workload_deployment_replica_available": `label_join(sum (label_join(label_replace(kube_deployment_status_replicas_available{namespace="default", deployment!="", deployment=~"apiserver|coredns"}, "owner_kind", "Deployment", "", ""), "workload", "", "deployment")) by (namespace, owner_kind, workload), "workload", ":", "owner_kind", "workload")`,
+	"pod_cpu_usage":                         `round(sum by (namespace, pod) (irate(container_cpu_usage_seconds_total{job="kubelet", pod!="", image!=""}[5m])) * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{owner_kind="ReplicaSet", owner_name=~"^elasticsearch-[^-]{1,10}$"} * on (namespace, pod) group_left(node) kube_pod_info{pod=~"elasticsearch-0", namespace="default"}, 0.001)`,
+	"pod_memory_usage":                      `sum by (namespace, pod) (container_memory_usage_bytes{job="kubelet", pod!="", image!=""}) * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{} * on (namespace, pod) group_left(node) kube_pod_info{pod="elasticsearch-12345", namespace="default"}`,
+	"pod_memory_usage_wo_cache":             `sum by (namespace, pod) (container_memory_working_set_bytes{job="kubelet", pod!="", image!=""}) * on (namespace, pod) group_left(owner_kind, owner_name) kube_pod_owner{} * on (namespace, pod) group_left(node) kube_pod_info{pod="elasticsearch-12345", node="i-2dazc1d6"}`,
+	"container_cpu_usage":                   `round(sum by (namespace, pod, container) (irate(container_cpu_usage_seconds_total{job="kubelet", container!="POD", container!="", image!="", pod="elasticsearch-12345", namespace="default", container="syscall"}[5m])), 0.001)`,
+	"container_memory_usage":                `sum by (namespace, pod, container) (container_memory_usage_bytes{job="kubelet", container!="POD", container!="", image!="", pod="elasticsearch-12345", namespace="default", container=~"syscall"})`,
 	"pvc_inodes_available":                  `max by (namespace, persistentvolumeclaim) (kubelet_volume_stats_inodes_free) * on (namespace, persistentvolumeclaim) group_left (storageclass) kube_persistentvolumeclaim_info{namespace="default", persistentvolumeclaim="db-123"}`,
 	"pvc_inodes_used":                       `max by (namespace, persistentvolumeclaim) (kubelet_volume_stats_inodes_used) * on (namespace, persistentvolumeclaim) group_left (storageclass) kube_persistentvolumeclaim_info{namespace="default", persistentvolumeclaim=~"db-123"}`,
 	"pvc_inodes_total":                      `max by (namespace, persistentvolumeclaim) (kubelet_volume_stats_inodes) * on (namespace, persistentvolumeclaim) group_left (storageclass) kube_persistentvolumeclaim_info{storageclass="default", persistentvolumeclaim=~"db-123"}`,

pkg/simple/client/monitoring/query_options.go

@@ -103,9 +103,11 @@ type PodOption struct {
 func (po PodOption) Apply(o *QueryOptions) {
 	o.Level = LevelPod
 	o.ResourceFilter = po.ResourceFilter
+	o.NodeName = po.NodeName
 	o.NamespaceName = po.NamespaceName
 	o.WorkloadKind = po.WorkloadKind
 	o.WorkloadName = po.WorkloadName
+	o.PodName = po.PodName
 }
 
 type ContainerOption struct {

pkg/simple/client/monitoring/types.go

@@ -26,8 +26,11 @@ type Point [2]float64
 
 type MetricValue struct {
 	Metadata map[string]string `json:"metric,omitempty" description:"time series labels"`
-	Sample   Point             `json:"value,omitempty" description:"time series, values of vector type"`
-	Series   []Point           `json:"values,omitempty" description:"time series, values of matrix type"`
+	// The type of Point is a float64 array with fixed length of 2.
+	// So Point will always be initialized as [0, 0], rather than nil.
+	// To allow empty Sample, we should declare Sample to type *Point
+	Sample *Point  `json:"value,omitempty" description:"time series, values of vector type"`
+	Series []Point `json:"values,omitempty" description:"time series, values of matrix type"`
 }
 
 func (p Point) Timestamp() float64 {