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main.go
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main.go
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package main
import (
"context"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
"os"
"time"
kitprometheus "github.com/go-kit/kit/metrics/prometheus"
"github.com/jmoiron/sqlx"
"github.com/mainflux/mainflux"
"github.com/mainflux/mainflux/auth"
api "github.com/mainflux/mainflux/auth/api"
grpcapi "github.com/mainflux/mainflux/auth/api/grpc"
httpapi "github.com/mainflux/mainflux/auth/api/http"
"github.com/mainflux/mainflux/auth/jwt"
"github.com/mainflux/mainflux/auth/keto"
"github.com/mainflux/mainflux/auth/postgres"
"github.com/mainflux/mainflux/auth/tracing"
"github.com/mainflux/mainflux/logger"
"github.com/mainflux/mainflux/pkg/errors"
"github.com/mainflux/mainflux/pkg/uuid"
"github.com/opentracing/opentracing-go"
acl "github.com/ory/keto/proto/ory/keto/acl/v1alpha1"
stdprometheus "github.com/prometheus/client_golang/prometheus"
jconfig "github.com/uber/jaeger-client-go/config"
"golang.org/x/sync/errgroup"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
)
const (
stopWaitTime = 5 * time.Second
httpProtocol = "http"
httpsProtocol = "https"
defLogLevel = "error"
defDBHost = "localhost"
defDBPort = "5432"
defDBUser = "mainflux"
defDBPass = "mainflux"
defDB = "auth"
defDBSSLMode = "disable"
defDBSSLCert = ""
defDBSSLKey = ""
defDBSSLRootCert = ""
defHTTPPort = "8180"
defGRPCPort = "8181"
defSecret = "auth"
defServerCert = ""
defServerKey = ""
defJaegerURL = ""
defKetoReadHost = "mainflux-keto"
defKetoWriteHost = "mainflux-keto"
defKetoReadPort = "4466"
defKetoWritePort = "4467"
defLoginDuration = "10h"
envLogLevel = "MF_AUTH_LOG_LEVEL"
envDBHost = "MF_AUTH_DB_HOST"
envDBPort = "MF_AUTH_DB_PORT"
envDBUser = "MF_AUTH_DB_USER"
envDBPass = "MF_AUTH_DB_PASS"
envDB = "MF_AUTH_DB"
envDBSSLMode = "MF_AUTH_DB_SSL_MODE"
envDBSSLCert = "MF_AUTH_DB_SSL_CERT"
envDBSSLKey = "MF_AUTH_DB_SSL_KEY"
envDBSSLRootCert = "MF_AUTH_DB_SSL_ROOT_CERT"
envHTTPPort = "MF_AUTH_HTTP_PORT"
envGRPCPort = "MF_AUTH_GRPC_PORT"
envSecret = "MF_AUTH_SECRET"
envServerCert = "MF_AUTH_SERVER_CERT"
envServerKey = "MF_AUTH_SERVER_KEY"
envJaegerURL = "MF_JAEGER_URL"
envKetoReadHost = "MF_KETO_READ_REMOTE_HOST"
envKetoWriteHost = "MF_KETO_WRITE_REMOTE_HOST"
envKetoReadPort = "MF_KETO_READ_REMOTE_PORT"
envKetoWritePort = "MF_KETO_WRITE_REMOTE_PORT"
envLoginDuration = "MF_AUTH_LOGIN_TOKEN_DURATION"
)
type config struct {
logLevel string
dbConfig postgres.Config
httpPort string
grpcPort string
secret string
serverCert string
serverKey string
jaegerURL string
resetURL string
ketoReadHost string
ketoWriteHost string
ketoWritePort string
ketoReadPort string
loginDuration time.Duration
}
type tokenConfig struct {
hmacSampleSecret []byte // secret for signing token
tokenDuration string // token in duration in min
}
func main() {
cfg := loadConfig()
ctx, cancel := context.WithCancel(context.Background())
g, ctx := errgroup.WithContext(ctx)
logger, err := logger.New(os.Stdout, cfg.logLevel)
if err != nil {
log.Fatalf(err.Error())
}
db := connectToDB(cfg.dbConfig, logger)
defer db.Close()
tracer, closer := initJaeger("auth", cfg.jaegerURL, logger)
defer closer.Close()
dbTracer, dbCloser := initJaeger("auth_db", cfg.jaegerURL, logger)
defer dbCloser.Close()
readerConn, writerConn := initKeto(cfg.ketoReadHost, cfg.ketoReadPort, cfg.ketoWriteHost, cfg.ketoWritePort, logger)
svc := newService(db, dbTracer, cfg.secret, logger, readerConn, writerConn, cfg.loginDuration)
g.Go(func() error {
return startHTTPServer(ctx, tracer, svc, cfg.httpPort, cfg.serverCert, cfg.serverKey, logger)
})
g.Go(func() error {
return startGRPCServer(ctx, tracer, svc, cfg.grpcPort, cfg.serverCert, cfg.serverKey, logger)
})
g.Go(func() error {
if sig := errors.SignalHandler(ctx); sig != nil {
cancel()
logger.Info(fmt.Sprintf("Authentication service shutdown by signal: %s", sig))
}
return nil
})
if err := g.Wait(); err != nil {
logger.Error(fmt.Sprintf("Authentication service terminated: %s", err))
}
}
func loadConfig() config {
dbConfig := postgres.Config{
Host: mainflux.Env(envDBHost, defDBHost),
Port: mainflux.Env(envDBPort, defDBPort),
User: mainflux.Env(envDBUser, defDBUser),
Pass: mainflux.Env(envDBPass, defDBPass),
Name: mainflux.Env(envDB, defDB),
SSLMode: mainflux.Env(envDBSSLMode, defDBSSLMode),
SSLCert: mainflux.Env(envDBSSLCert, defDBSSLCert),
SSLKey: mainflux.Env(envDBSSLKey, defDBSSLKey),
SSLRootCert: mainflux.Env(envDBSSLRootCert, defDBSSLRootCert),
}
loginDuration, err := time.ParseDuration(mainflux.Env(envLoginDuration, defLoginDuration))
if err != nil {
log.Fatal(err)
}
return config{
logLevel: mainflux.Env(envLogLevel, defLogLevel),
dbConfig: dbConfig,
httpPort: mainflux.Env(envHTTPPort, defHTTPPort),
grpcPort: mainflux.Env(envGRPCPort, defGRPCPort),
secret: mainflux.Env(envSecret, defSecret),
serverCert: mainflux.Env(envServerCert, defServerCert),
serverKey: mainflux.Env(envServerKey, defServerKey),
jaegerURL: mainflux.Env(envJaegerURL, defJaegerURL),
ketoReadHost: mainflux.Env(envKetoReadHost, defKetoReadHost),
ketoWriteHost: mainflux.Env(envKetoWriteHost, defKetoWriteHost),
ketoReadPort: mainflux.Env(envKetoReadPort, defKetoReadPort),
ketoWritePort: mainflux.Env(envKetoWritePort, defKetoWritePort),
loginDuration: loginDuration,
}
}
func initJaeger(svcName, url string, logger logger.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(fmt.Sprintf("Failed to init Jaeger: %s", err))
os.Exit(1)
}
return tracer, closer
}
func initKeto(hostReadAddress, readPort, hostWriteAddress, writePort string, logger logger.Logger) (readerConnection, writerConnection *grpc.ClientConn) {
readConn, err := grpc.Dial(fmt.Sprintf("%s:%s", hostReadAddress, readPort), grpc.WithInsecure())
if err != nil {
logger.Error(fmt.Sprintf("Failed to dial %s:%s for Keto Read Service: %s", hostReadAddress, readPort, err))
os.Exit(1)
}
writeConn, err := grpc.Dial(fmt.Sprintf("%s:%s", hostWriteAddress, writePort), grpc.WithInsecure())
if err != nil {
logger.Error(fmt.Sprintf("Failed to dial %s:%s for Keto Write Service: %s", hostWriteAddress, writePort, err))
os.Exit(1)
}
return readConn, writeConn
}
func connectToDB(dbConfig postgres.Config, logger logger.Logger) *sqlx.DB {
db, err := postgres.Connect(dbConfig)
if err != nil {
logger.Error(fmt.Sprintf("Failed to connect to postgres: %s", err))
os.Exit(1)
}
return db
}
func newService(db *sqlx.DB, tracer opentracing.Tracer, secret string, logger logger.Logger, readerConn, writerConn *grpc.ClientConn, duration time.Duration) auth.Service {
database := postgres.NewDatabase(db)
keysRepo := tracing.New(postgres.New(database), tracer)
groupsRepo := postgres.NewGroupRepo(database)
groupsRepo = tracing.GroupRepositoryMiddleware(tracer, groupsRepo)
pa := keto.NewPolicyAgent(acl.NewCheckServiceClient(readerConn), acl.NewWriteServiceClient(writerConn), acl.NewReadServiceClient(readerConn))
idProvider := uuid.New()
t := jwt.New(secret)
svc := auth.New(keysRepo, groupsRepo, idProvider, t, pa, duration)
svc = api.LoggingMiddleware(svc, logger)
svc = api.MetricsMiddleware(
svc,
kitprometheus.NewCounterFrom(stdprometheus.CounterOpts{
Namespace: "auth",
Subsystem: "api",
Name: "request_count",
Help: "Number of requests received.",
}, []string{"method"}),
kitprometheus.NewSummaryFrom(stdprometheus.SummaryOpts{
Namespace: "auth",
Subsystem: "api",
Name: "request_latency_microseconds",
Help: "Total duration of requests in microseconds.",
}, []string{"method"}),
)
return svc
}
func startHTTPServer(ctx context.Context, tracer opentracing.Tracer, svc auth.Service, port string, certFile string, keyFile string, logger logger.Logger) error {
p := fmt.Sprintf(":%s", port)
server := &http.Server{Addr: p, Handler: httpapi.MakeHandler(svc, tracer, logger)}
errCh := make(chan error)
protocol := httpProtocol
switch {
case certFile != "" || keyFile != "":
logger.Info(fmt.Sprintf("Authentication service started using https, cert %s key %s, exposed port %s", certFile, keyFile, port))
go func() {
errCh <- server.ListenAndServeTLS(certFile, keyFile)
}()
protocol = httpsProtocol
default:
logger.Info(fmt.Sprintf("Authentication service started using http, exposed port %s", port))
go func() {
errCh <- server.ListenAndServe()
}()
}
select {
case <-ctx.Done():
ctxShutdown, cancelShutdown := context.WithTimeout(context.Background(), stopWaitTime)
defer cancelShutdown()
if err := server.Shutdown(ctxShutdown); err != nil {
logger.Error(fmt.Sprintf("Authentication %s service error occurred during shutdown at %s: %s", protocol, p, err))
return fmt.Errorf("Authentication %s service error occurred during shutdown at %s: %w", protocol, p, err)
}
logger.Info(fmt.Sprintf("Authentication %s service shutdown of http at %s", protocol, p))
return nil
case err := <-errCh:
return err
}
}
func startGRPCServer(ctx context.Context, tracer opentracing.Tracer, svc auth.Service, port string, certFile string, keyFile string, logger logger.Logger) error {
p := fmt.Sprintf(":%s", port)
errCh := make(chan error)
listener, err := net.Listen("tcp", p)
if err != nil {
return fmt.Errorf("failed to listen on port %s: %w", port, err)
}
var server *grpc.Server
switch {
case certFile != "" || keyFile != "":
creds, err := credentials.NewServerTLSFromFile(certFile, keyFile)
if err != nil {
return fmt.Errorf("failed to load auth certificates: %w", err)
}
logger.Info(fmt.Sprintf("Authentication gRPC service started using https on port %s with cert %s key %s", port, certFile, keyFile))
server = grpc.NewServer(grpc.Creds(creds))
default:
logger.Info(fmt.Sprintf("Authentication gRPC service started using http on port %s", port))
server = grpc.NewServer()
}
mainflux.RegisterAuthServiceServer(server, grpcapi.NewServer(tracer, svc))
logger.Info(fmt.Sprintf("Authentication gRPC service started, exposed port %s", port))
go func() {
errCh <- server.Serve(listener)
}()
select {
case <-ctx.Done():
c := make(chan bool)
go func() {
defer close(c)
server.GracefulStop()
}()
select {
case <-c:
case <-time.After(stopWaitTime):
}
logger.Info(fmt.Sprintf("Authentication gRPC service shutdown at %s", p))
return nil
case err := <-errCh:
return err
}
}