Move codes to pkg (#46)

pkg/ingress/kube/common/metrics.go

@@ -0,0 +1,68 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package common
+
+import "istio.io/pkg/monitoring"
+
+type Event string
+
+const (
+	Normal Event = "normal"
+
+	Unknown Event = "unknown"
+
+	EmptyRule Event = "empty-rule"
+
+	MissingSecret Event = "missing-secret"
+
+	InvalidBackendService Event = "invalid-backend-service"
+
+	DuplicatedRoute Event = "duplicated-route"
+
+	DuplicatedTls Event = "duplicated-tls"
+
+	PortNameResolveError Event = "port-name-resolve-error"
+)
+
+var (
+	clusterTag  = monitoring.MustCreateLabel("cluster")
+	invalidType = monitoring.MustCreateLabel("type")
+
+	// totalIngresses tracks the total number of ingress
+	totalIngresses = monitoring.NewGauge(
+		"pilot_total_ingresses",
+		"Total ingresses known to pilot.",
+		monitoring.WithLabels(clusterTag),
+	)
+
+	totalInvalidIngress = monitoring.NewSum(
+		"pilot_total_invalid_ingresses",
+		"Total invalid ingresses known to pilot.",
+		monitoring.WithLabels(clusterTag, invalidType),
+	)
+)
+
+func init() {
+	monitoring.MustRegister(totalIngresses)
+	monitoring.MustRegister(totalInvalidIngress)
+}
+
+func RecordIngressNumber(cluster string, number int) {
+	totalIngresses.With(clusterTag.Value(cluster)).Record(float64(number))
+}
+
+func IncrementInvalidIngress(cluster string, event Event) {
+	totalInvalidIngress.With(clusterTag.Value(cluster), invalidType.Value(string(event))).Increment()
+}