app/routers/metrics/increment.go

@@ -0,0 +1,25 @@
+package routers
+
+import (
+	"encoding/json"
+	"log"
+	increments "monitoring/app/storage/clickhouse/tables"
+	"net/http"
+)
+
+func AddIncrementMetric(r *http.Request) (interface{}, int) {
+	d := json.NewDecoder(r.Body)
+	body := increments.IncrementMetric{}
+	err := d.Decode(&body)
+	if err != nil {
+		return nil, http.StatusBadRequest
+	}
+
+	err = increments.AddIncrementMetric(body)
+	if err != nil {
+		log.Print(err.Error())
+		return nil, http.StatusInternalServerError
+	}
+
+	return nil, http.StatusAccepted
+}

app/storage/clickhouse/client.go

@@ -91,5 +91,24 @@ func Migrate() error {
 		log.Fatal(err)
 		return err
 	}
+
+	err = Connection.Exec(
+		context.TODO(),
+		`CREATE TABLE IF NOT EXISTS increments (
+			timestamp         DateTime,
+			service           LowCardinality(String),
+			environment       LowCardinality(String),
+			name              LowCardinality(String),
+			count             UInt16
+		)
+		ENGINE = MergeTree
+		PARTITION BY toYYYYMM(timestamp)
+		ORDER BY (service, environment, name, timestamp);`,
+	)
+	if err != nil {
+		log.Fatal(err)
+		return err
+	}
+
 	return nil
 }

app/storage/clickhouse/tables/increments.go

@@ -0,0 +1,34 @@
+package storage
+
+import (
+	"context"
+	"time"
+)
+
+type IncrementMetric struct {
+	Timestamp   time.Time `json:"timestamp"`
+	Service     string    `json:"service"`
+	Environment string    `json:"environment"`
+	Name        string    `json:"name"`
+	Count       int       `json:"count"`
+}
+
+func AddIncrementMetric(metric IncrementMetric) error {
+	batch, err := connection().PrepareBatch(context.Background(), "INSERT INTO increments")
+	if err != nil {
+		return err
+	}
+
+	err = batch.Append(
+		metric.Timestamp,
+		metric.Service,
+		metric.Environment,
+		metric.Name,
+		metric.Count,
+	)
+	if err != nil {
+		return err
+	}
+
+	return batch.Send()
+}

main.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"log"
 	endpoint "monitoring/app/routers/metrics"
+	increment "monitoring/app/routers/metrics"
 	task "monitoring/app/routers/metrics"
 	client "monitoring/app/storage/clickhouse"
 	"net/http"
@@ -43,6 +44,7 @@ func main() {
 
 	http.HandleFunc("/api/v1/metrics/endpoint", handlerWrapper(endpoint.AddEndpointMetric))
 	http.HandleFunc("/api/v1/metrics/task", handlerWrapper(task.AddTaskMetric))
+	http.HandleFunc("/api/v1/metrics/increment", handlerWrapper(increment.AddIncrementMetric))
 	log.Printf("Server started")
 	http.ListenAndServe(":1237", nil)
 }