From d11cb99fb101a6798fd57fa44d332737d6637e75 Mon Sep 17 00:00:00 2001
From: Dileep Ranganathan <dileep.ranganathan@intel.com>
Date: Thu, 31 Oct 2019 15:46:37 -0700
Subject: Prometheus Kafka Writer Microservice

This patch implents Prometheus to remote Kafka Writer Microservice
Added sample day-2 config to configure prometheus

PS4: Fixed Review comments

Issue-ID: ONAPARC-393
Signed-off-by: Dileep Ranganathan <dileep.ranganathan@intel.com>
Change-Id: I0bc77175593a165effd7bb1cb4802c988a5ef4ec
---
 .../cmd/prom-kafka-writer/main.go                  | 71 ++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 vnfs/DAaaS/microservices/prom-kafka-writer/cmd/prom-kafka-writer/main.go

(limited to 'vnfs/DAaaS/microservices/prom-kafka-writer/cmd/prom-kafka-writer/main.go')

diff --git a/vnfs/DAaaS/microservices/prom-kafka-writer/cmd/prom-kafka-writer/main.go b/vnfs/DAaaS/microservices/prom-kafka-writer/cmd/prom-kafka-writer/main.go
new file mode 100644
index 00000000..08dc38b5
--- /dev/null
+++ b/vnfs/DAaaS/microservices/prom-kafka-writer/cmd/prom-kafka-writer/main.go
@@ -0,0 +1,71 @@
+/*
+ *
+ * Copyright 2019 Intel Corporation.
+ * 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 main
+
+import (
+	"context"
+	"net/http"
+	"os"
+	"os/signal"
+	"time"
+
+	"prom-kafka-writer/pkg/api"
+	logger "prom-kafka-writer/pkg/config"
+	kw "prom-kafka-writer/pkg/kafkawriter"
+)
+
+const defaultAddr = ":8686"
+
+// main starts an http server on the $PORT environment variable.
+func main() {
+	log := logger.GetLoggerInstance()
+
+	addr := defaultAddr
+	// $PORT environment variable is provided in the Kubernetes deployment.
+	if p := os.Getenv("PORT"); p != "" {
+		addr = ":" + p
+	}
+
+	log.Infow("Starting Prometheus Kafka writer", "addr", addr)
+	defer log.Infow("Prometheus Kafka writer Terminated")
+
+	s := &http.Server{
+		Handler: api.NewRouter(),
+		Addr:    addr,
+	}
+
+	// shutdown hook. Wait for clean up if the pod/container is killed
+	shutdownChannel := make(chan struct{})
+	go func() {
+		log.Debug("msg", "Creating shutdown hooks")
+		sigChan := make(chan os.Signal, 1)
+		signal.Notify(sigChan, os.Interrupt)
+		<-sigChan
+		log.Debug("msg", "Received os.Interrupt")
+		log.Debug("msg", "Initiate cleanup")
+		//TODO: Cleanup here
+		kw.Cleanup()
+		time.Sleep(time.Second * 3)
+		_ = s.Shutdown(context.Background())
+		close(shutdownChannel)
+	}()
+
+	err := s.ListenAndServe()
+	if err != nil {
+		log.Fatalw("Server Error - Shutting down", "error", err)
+	}
+	<-shutdownChannel
+}
-- 
cgit 1.2.3-korg