forked from orb-community/orb
/
main.go
315 lines (277 loc) · 9.43 KB
/
main.go
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// Copyright (c) Mainflux
// SPDX-License-Identifier: Apache-2.0
// Adapted for Orb project, modifications licensed under MPL v. 2.0:
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
package main
import (
"context"
"fmt"
kitprometheus "github.com/go-kit/kit/metrics/prometheus"
"github.com/go-redis/redis/v8"
"github.com/go-zoo/bone"
"github.com/etaques/orb/buildinfo"
fleetgrpc "github.com/etaques/orb/fleet/api/grpc"
"github.com/etaques/orb/pkg/config"
policiesgrpc "github.com/etaques/orb/policies/api/grpc"
"github.com/etaques/orb/sinker"
sinkconfig "github.com/etaques/orb/sinker/config"
cacheconfig "github.com/etaques/orb/sinker/redis"
"github.com/etaques/orb/sinker/redis/consumer"
"github.com/etaques/orb/sinker/redis/producer"
sinksgrpc "github.com/etaques/orb/sinks/api/grpc"
"github.com/opentracing/opentracing-go"
stdprometheus "github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
jconfig "github.com/uber/jaeger-client-go/config"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/credentials/insecure"
"io"
"io/ioutil"
"log"
"net/http"
"os"
"os/signal"
"strconv"
"strings"
"syscall"
"time"
mflog "github.com/mainflux/mainflux/logger"
mfnats "github.com/mainflux/mainflux/pkg/messaging/nats"
)
const (
svcName = "sinker"
envPrefix = "orb_sinker"
httpPort = "8201"
)
func main() {
natsCfg := config.LoadNatsConfig(envPrefix)
esCfg := config.LoadEsConfig(envPrefix)
cacheCfg := config.LoadCacheConfig(envPrefix)
svcCfg := config.LoadBaseServiceConfig(envPrefix, httpPort)
jCfg := config.LoadJaegerConfig(envPrefix)
fleetGRPCCfg := config.LoadGRPCConfig("orb", "fleet")
policiesGRPCCfg := config.LoadGRPCConfig("orb", "policies")
sinksGRPCCfg := config.LoadGRPCConfig("orb", "sinks")
otelCfg := config.LoadOtelConfig(envPrefix)
// main logger
var logger *zap.Logger
atomicLevel := zap.NewAtomicLevel()
switch strings.ToLower(svcCfg.LogLevel) {
case "debug":
atomicLevel.SetLevel(zap.DebugLevel)
case "warn":
atomicLevel.SetLevel(zap.WarnLevel)
case "info":
atomicLevel.SetLevel(zap.InfoLevel)
default:
atomicLevel.SetLevel(zap.InfoLevel)
}
encoderCfg := zap.NewProductionEncoderConfig()
encoderCfg.EncodeTime = zapcore.ISO8601TimeEncoder
core := zapcore.NewCore(
zapcore.NewJSONEncoder(encoderCfg),
os.Stdout,
atomicLevel,
)
logger = zap.New(core, zap.AddCaller())
defer func(logger *zap.Logger) {
err := logger.Sync()
if err != nil {
log.Fatalf(err.Error())
}
}(logger) // flushes buffer, if any
// only needed for mainflux interfaces
mflogger, err := mflog.New(os.Stdout, svcCfg.LogLevel)
if err != nil {
log.Fatalf(err.Error())
}
cacheClient := connectToRedis(cacheCfg.URL, cacheCfg.Pass, cacheCfg.DB, logger)
esClient := connectToRedis(esCfg.URL, esCfg.Pass, esCfg.DB, logger)
defer func(esClient *redis.Client) {
err := esClient.Close()
if err != nil {
log.Fatalf(err.Error())
}
}(esClient)
tracer, tracerCloser := initJaeger(svcName, jCfg.URL, logger)
defer func(tracerCloser io.Closer) {
err := tracerCloser.Close()
if err != nil {
log.Fatalf(err.Error())
}
}(tracerCloser)
pubSub, err := mfnats.NewPubSub(natsCfg.URL, svcName, mflogger)
if err != nil {
logger.Error("Failed to connect to NATS", zap.Error(err))
os.Exit(1)
}
defer pubSub.Close()
policiesGRPCConn := connectToGRPC(policiesGRPCCfg, logger)
defer func(policiesGRPCConn *grpc.ClientConn) {
err := policiesGRPCConn.Close()
if err != nil {
log.Fatalf(err.Error())
}
}(policiesGRPCConn)
policiesGRPCTimeout, err := time.ParseDuration(policiesGRPCCfg.Timeout)
if err != nil {
log.Fatalf("Invalid %s value: %s", policiesGRPCCfg.Timeout, err.Error())
}
policiesGRPCClient := policiesgrpc.NewClient(tracer, policiesGRPCConn, policiesGRPCTimeout)
fleetGRPCConn := connectToGRPC(fleetGRPCCfg, logger)
defer func(fleetGRPCConn *grpc.ClientConn) {
err := fleetGRPCConn.Close()
if err != nil {
log.Fatalf(err.Error())
}
}(fleetGRPCConn)
fleetGRPCTimeout, err := time.ParseDuration(fleetGRPCCfg.Timeout)
if err != nil {
log.Fatalf("Invalid %s value: %s", fleetGRPCCfg.Timeout, err.Error())
}
fleetGRPCClient := fleetgrpc.NewClient(tracer, fleetGRPCConn, fleetGRPCTimeout)
sinksGRPCConn := connectToGRPC(sinksGRPCCfg, logger)
defer func(sinksGRPCConn *grpc.ClientConn) {
err := sinksGRPCConn.Close()
if err != nil {
log.Fatalf(err.Error())
}
}(sinksGRPCConn)
sinksGRPCTimeout, err := time.ParseDuration(sinksGRPCCfg.Timeout)
if err != nil {
log.Fatalf("Invalid %s value: %s", sinksGRPCCfg.Timeout, err.Error())
}
sinksGRPCClient := sinksgrpc.NewClient(tracer, sinksGRPCConn, sinksGRPCTimeout, logger)
configRepo := cacheconfig.NewSinkerCache(cacheClient, logger)
configRepo = producer.NewEventStoreMiddleware(configRepo, esClient)
gauge := kitprometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Namespace: "sinker",
Subsystem: "sink",
Name: "payload_size",
Help: "Total size of outbound payloads",
}, []string{"method", "agent_id", "agent", "policy_id", "policy", "sink_id", "owner_id"})
counter := kitprometheus.NewCounterFrom(stdprometheus.CounterOpts{
Namespace: "sinker",
Subsystem: "sink",
Name: "payload_count",
Help: "Number of payloads wrote",
}, []string{"method", "agent_id", "agent", "policy_id", "policy", "sink_id", "owner_id"})
inputCounter := kitprometheus.NewCounterFrom(stdprometheus.CounterOpts{
Namespace: "sinker",
Subsystem: "sink",
Name: "message_inbound",
Help: "Number of messages received",
}, []string{"method", "agent_id", "subtopic", "channel", "protocol"})
otelEnabled := otelCfg.Enable == "true"
otelKafkaUrl := otelCfg.KafkaUrl
svc := sinker.New(logger, pubSub, esClient, configRepo, policiesGRPCClient, fleetGRPCClient, sinksGRPCClient, otelKafkaUrl, otelEnabled, gauge, counter, inputCounter)
defer func(svc sinker.Service) {
err := svc.Stop()
if err != nil {
log.Fatalf("fatal error in stop the service: %e", err)
}
}(svc)
errs := make(chan error, 2)
go startHTTPServer(svcCfg, errs, logger)
go subscribeToSinksES(svc, configRepo, esClient, esCfg, logger)
err = svc.Start()
if err != nil {
logger.Error("unable to start agent metric consumption", zap.Error(err))
os.Exit(1)
}
go func() {
c := make(chan os.Signal)
signal.Notify(c, syscall.SIGINT)
errs <- fmt.Errorf("%s", <-c)
}()
err = <-errs
logger.Error("sinker service terminated", zap.Error(err))
}
func makeHandler(svcName string) http.Handler {
r := bone.New()
r.GetFunc("/version", buildinfo.Version(svcName))
r.Handle("/metrics", promhttp.Handler())
return r
}
func startHTTPServer(cfg config.BaseSvcConfig, errs chan error, logger *zap.Logger) {
p := fmt.Sprintf(":%s", cfg.HttpPort)
if cfg.HttpServerCert != "" || cfg.HttpServerKey != "" {
logger.Info(fmt.Sprintf("Sinker service started using https on port %s with cert %s key %s",
cfg.HttpPort, cfg.HttpServerCert, cfg.HttpServerKey))
errs <- http.ListenAndServeTLS(p, cfg.HttpServerCert, cfg.HttpServerKey, makeHandler(svcName))
return
}
logger.Info(fmt.Sprintf("Sinker service started using http on port %s", cfg.HttpPort))
errs <- http.ListenAndServe(p, makeHandler(svcName))
}
func connectToRedis(URL, pass string, cacheDB string, logger *zap.Logger) *redis.Client {
db, err := strconv.Atoi(cacheDB)
if err != nil {
logger.Error("Failed to connect to cache", zap.Error(err))
os.Exit(1)
}
return redis.NewClient(&redis.Options{
Addr: URL,
Password: pass,
DB: db,
})
}
func connectToGRPC(cfg config.GRPCConfig, logger *zap.Logger) *grpc.ClientConn {
var opts []grpc.DialOption
tls, err := strconv.ParseBool(cfg.ClientTLS)
if err != nil {
tls = false
}
if tls {
if cfg.CaCerts != "" {
tpc, err := credentials.NewClientTLSFromFile(cfg.CaCerts, "")
if err != nil {
logger.Error(fmt.Sprintf("Failed to create tls credentials: %s", err))
os.Exit(1)
}
opts = append(opts, grpc.WithTransportCredentials(tpc))
}
} else {
opts = append(opts, grpc.WithTransportCredentials(insecure.NewCredentials()))
}
conn, err := grpc.Dial(cfg.URL, opts...)
if err != nil {
logger.Error(fmt.Sprintf("Failed to dial to gRPC service %s: %s", cfg.URL, err))
os.Exit(1)
}
logger.Info(fmt.Sprintf("Dialed to gRPC service %s at %s, TLS? %t", cfg.Service, cfg.URL, tls))
return conn
}
func initJaeger(svcName, url string, logger *zap.Logger) (opentracing.Tracer, io.Closer) {
if url == "" {
return opentracing.NoopTracer{}, ioutil.NopCloser(nil)
}
tracer, closer, err := jconfig.Configuration{
ServiceName: svcName,
Sampler: &jconfig.SamplerConfig{
Type: "const",
Param: 1,
},
Reporter: &jconfig.ReporterConfig{
LocalAgentHostPort: url,
LogSpans: true,
},
}.NewTracer()
if err != nil {
logger.Error("Failed to init Jaeger client", zap.Error(err))
os.Exit(1)
}
return tracer, closer
}
func subscribeToSinksES(svc sinker.Service, configRepo sinkconfig.ConfigRepo, client *redis.Client, cfg config.EsConfig, logger *zap.Logger) {
eventStore := consumer.NewEventStore(svc, configRepo, client, cfg.Consumer, logger)
logger.Info("Subscribed to Redis Event Store for sinks")
if err := eventStore.Subscribe(context.Background()); err != nil {
logger.Error("Bootstrap service failed to subscribe to event sourcing", zap.Error(err))
}
}