forked from absmach/magistrala
/
main.go
453 lines (396 loc) · 13.9 KB
/
main.go
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// Copyright (c) Mainflux
// SPDX-License-Identifier: Apache-2.0
package main
import (
"context"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"os"
"regexp"
"strconv"
"time"
"github.com/mainflux/mainflux/internal/email"
"github.com/mainflux/mainflux/pkg/errors"
"github.com/mainflux/mainflux/pkg/uuid"
"github.com/mainflux/mainflux/users"
"github.com/mainflux/mainflux/users/bcrypt"
"github.com/mainflux/mainflux/users/emailer"
"github.com/mainflux/mainflux/users/tracing"
"golang.org/x/sync/errgroup"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
kitprometheus "github.com/go-kit/kit/metrics/prometheus"
"github.com/jmoiron/sqlx"
"github.com/mainflux/mainflux"
authapi "github.com/mainflux/mainflux/auth/api/grpc"
"github.com/mainflux/mainflux/logger"
"github.com/mainflux/mainflux/users/api"
"github.com/mainflux/mainflux/users/postgres"
opentracing "github.com/opentracing/opentracing-go"
stdprometheus "github.com/prometheus/client_golang/prometheus"
jconfig "github.com/uber/jaeger-client-go/config"
)
const (
stopWaitTime = 5 * time.Second
defLogLevel = "error"
defDBHost = "localhost"
defDBPort = "5432"
defDBUser = "mainflux"
defDBPass = "mainflux"
defDB = "users"
defDBSSLMode = "disable"
defDBSSLCert = ""
defDBSSLKey = ""
defDBSSLRootCert = ""
defHTTPPort = "8180"
defServerCert = ""
defServerKey = ""
defJaegerURL = ""
defEmailHost = "localhost"
defEmailPort = "25"
defEmailUsername = "root"
defEmailPassword = ""
defEmailFromAddress = ""
defEmailFromName = ""
defEmailTemplate = "email.tmpl"
defAdminEmail = ""
defAdminPassword = ""
defPassRegex = "^.{8,}$"
defAdminGroup = "mainflux"
defTokenResetEndpoint = "/reset-request" // URL where user lands after click on the reset link from email
defAuthTLS = "false"
defAuthCACerts = ""
defAuthURL = "localhost:8181"
defAuthTimeout = "1s"
defSelfRegister = "true" // By default, everybody can create a user. Otherwise, only admin can create a user.
envLogLevel = "MF_USERS_LOG_LEVEL"
envDBHost = "MF_USERS_DB_HOST"
envDBPort = "MF_USERS_DB_PORT"
envDBUser = "MF_USERS_DB_USER"
envDBPass = "MF_USERS_DB_PASS"
envDB = "MF_USERS_DB"
envDBSSLMode = "MF_USERS_DB_SSL_MODE"
envDBSSLCert = "MF_USERS_DB_SSL_CERT"
envDBSSLKey = "MF_USERS_DB_SSL_KEY"
envDBSSLRootCert = "MF_USERS_DB_SSL_ROOT_CERT"
envHTTPPort = "MF_USERS_HTTP_PORT"
envServerCert = "MF_USERS_SERVER_CERT"
envServerKey = "MF_USERS_SERVER_KEY"
envJaegerURL = "MF_JAEGER_URL"
envAdminEmail = "MF_USERS_ADMIN_EMAIL"
envAdminPassword = "MF_USERS_ADMIN_PASSWORD"
envPassRegex = "MF_USERS_PASS_REGEX"
envEmailHost = "MF_EMAIL_HOST"
envEmailPort = "MF_EMAIL_PORT"
envEmailUsername = "MF_EMAIL_USERNAME"
envEmailPassword = "MF_EMAIL_PASSWORD"
envEmailFromAddress = "MF_EMAIL_FROM_ADDRESS"
envEmailFromName = "MF_EMAIL_FROM_NAME"
envEmailLogLevel = "MF_EMAIL_LOG_LEVEL"
envEmailTemplate = "MF_EMAIL_TEMPLATE"
envTokenResetEndpoint = "MF_TOKEN_RESET_ENDPOINT"
envAuthTLS = "MF_AUTH_CLIENT_TLS"
envAuthCACerts = "MF_AUTH_CA_CERTS"
envAuthURL = "MF_AUTH_GRPC_URL"
envAuthTimeout = "MF_AUTH_GRPC_TIMEOUT"
envSelfRegister = "MF_USERS_ALLOW_SELF_REGISTER"
)
type config struct {
logLevel string
dbConfig postgres.Config
emailConf email.Config
httpPort string
serverCert string
serverKey string
jaegerURL string
resetURL string
authTLS bool
authCACerts string
authURL string
authTimeout time.Duration
adminEmail string
adminPassword string
passRegex *regexp.Regexp
selfRegister bool
}
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()
authTracer, closer := initJaeger("auth", cfg.jaegerURL, logger)
defer closer.Close()
auth, close := connectToAuth(cfg, authTracer, logger)
if close != nil {
defer close()
}
tracer, closer := initJaeger("users", cfg.jaegerURL, logger)
defer closer.Close()
dbTracer, dbCloser := initJaeger("users_db", cfg.jaegerURL, logger)
defer dbCloser.Close()
svc := newService(db, dbTracer, auth, cfg, logger)
g.Go(func() error {
return startHTTPServer(ctx, tracer, svc, cfg.httpPort, cfg.serverCert, cfg.serverKey, logger)
})
g.Go(func() error {
if sig := errors.SignalHandler(ctx); sig != nil {
cancel()
logger.Info(fmt.Sprintf("Users service shutdown by signal: %s", sig))
}
return nil
})
if err := g.Wait(); err != nil {
logger.Error(fmt.Sprintf("Users service terminated: %s", err))
}
}
func loadConfig() config {
authTimeout, err := time.ParseDuration(mainflux.Env(envAuthTimeout, defAuthTimeout))
if err != nil {
log.Fatalf("Invalid %s value: %s", envAuthTimeout, err.Error())
}
tls, err := strconv.ParseBool(mainflux.Env(envAuthTLS, defAuthTLS))
if err != nil {
log.Fatalf("Invalid value passed for %s\n", envAuthTLS)
}
passRegex, err := regexp.Compile(mainflux.Env(envPassRegex, defPassRegex))
if err != nil {
log.Fatalf("Invalid password validation rules %s\n", envPassRegex)
}
selfRegister, err := strconv.ParseBool(mainflux.Env(envSelfRegister, defSelfRegister))
if err != nil {
log.Fatalf("Invalid %s value: %s", envSelfRegister, err.Error())
}
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),
}
emailConf := email.Config{
FromAddress: mainflux.Env(envEmailFromAddress, defEmailFromAddress),
FromName: mainflux.Env(envEmailFromName, defEmailFromName),
Host: mainflux.Env(envEmailHost, defEmailHost),
Port: mainflux.Env(envEmailPort, defEmailPort),
Username: mainflux.Env(envEmailUsername, defEmailUsername),
Password: mainflux.Env(envEmailPassword, defEmailPassword),
Template: mainflux.Env(envEmailTemplate, defEmailTemplate),
}
return config{
logLevel: mainflux.Env(envLogLevel, defLogLevel),
dbConfig: dbConfig,
emailConf: emailConf,
httpPort: mainflux.Env(envHTTPPort, defHTTPPort),
serverCert: mainflux.Env(envServerCert, defServerCert),
serverKey: mainflux.Env(envServerKey, defServerKey),
jaegerURL: mainflux.Env(envJaegerURL, defJaegerURL),
resetURL: mainflux.Env(envTokenResetEndpoint, defTokenResetEndpoint),
authTLS: tls,
authCACerts: mainflux.Env(envAuthCACerts, defAuthCACerts),
authURL: mainflux.Env(envAuthURL, defAuthURL),
authTimeout: authTimeout,
adminEmail: mainflux.Env(envAdminEmail, defAdminEmail),
adminPassword: mainflux.Env(envAdminPassword, defAdminPassword),
passRegex: passRegex,
selfRegister: selfRegister,
}
}
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 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 connectToAuth(cfg config, tracer opentracing.Tracer, logger logger.Logger) (mainflux.AuthServiceClient, func() error) {
var opts []grpc.DialOption
if cfg.authTLS {
if cfg.authCACerts != "" {
tpc, err := credentials.NewClientTLSFromFile(cfg.authCACerts, "")
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.WithInsecure())
logger.Info("gRPC communication is not encrypted")
}
conn, err := grpc.Dial(cfg.authURL, opts...)
if err != nil {
logger.Error(fmt.Sprintf("Failed to connect to auth service: %s", err))
os.Exit(1)
}
return authapi.NewClient(tracer, conn, cfg.authTimeout), conn.Close
}
func newService(db *sqlx.DB, tracer opentracing.Tracer, auth mainflux.AuthServiceClient, c config, logger logger.Logger) users.Service {
database := postgres.NewDatabase(db)
hasher := bcrypt.New()
userRepo := tracing.UserRepositoryMiddleware(postgres.NewUserRepo(database), tracer)
emailer, err := emailer.New(c.resetURL, &c.emailConf)
if err != nil {
logger.Error(fmt.Sprintf("Failed to configure e-mailing util: %s", err.Error()))
}
idProvider := uuid.New()
svc := users.New(userRepo, hasher, auth, emailer, idProvider, c.passRegex)
svc = api.LoggingMiddleware(svc, logger)
svc = api.MetricsMiddleware(
svc,
kitprometheus.NewCounterFrom(stdprometheus.CounterOpts{
Namespace: "users",
Subsystem: "api",
Name: "request_count",
Help: "Number of requests received.",
}, []string{"method"}),
kitprometheus.NewSummaryFrom(stdprometheus.SummaryOpts{
Namespace: "users",
Subsystem: "api",
Name: "request_latency_microseconds",
Help: "Total duration of requests in microseconds.",
}, []string{"method"}),
)
if err := createAdmin(svc, userRepo, c, auth); err != nil {
logger.Error("failed to create admin user: " + err.Error())
os.Exit(1)
}
switch c.selfRegister {
case true:
// If MF_USERS_ALLOW_SELF_REGISTER environment variable is "true",
// everybody can create a new user. Here, check the existence of that
// policy. If the policy does not exist, create it; otherwise, there is
// no need to do anything further.
_, err := auth.Authorize(context.Background(), &mainflux.AuthorizeReq{Obj: "user", Act: "create", Sub: "*"})
if err != nil {
// Add a policy that allows anybody to create a user
apr, err := auth.AddPolicy(context.Background(), &mainflux.AddPolicyReq{Obj: "user", Act: "create", Sub: "*"})
if err != nil {
logger.Error("failed to add the policy related to MF_USERS_ALLOW_SELF_REGISTER: " + err.Error())
os.Exit(1)
}
if !apr.GetAuthorized() {
logger.Error("failed to authorized the policy result related to MF_USERS_ALLOW_SELF_REGISTER: " + errors.ErrAuthorization.Error())
os.Exit(1)
}
}
default:
// If MF_USERS_ALLOW_SELF_REGISTER environment variable is "false",
// everybody cannot create a new user. Therefore, delete a policy that
// allows everybody to create a new user.
dpr, err := auth.DeletePolicy(context.Background(), &mainflux.DeletePolicyReq{Obj: "user", Act: "create", Sub: "*"})
if err != nil {
logger.Error("failed to delete a policy: " + err.Error())
os.Exit(1)
}
if !dpr.GetDeleted() {
logger.Error("deleting a policy expected to succeed.")
os.Exit(1)
}
}
return svc
}
func createAdmin(svc users.Service, userRepo users.UserRepository, c config, auth mainflux.AuthServiceClient) error {
user := users.User{
Email: c.adminEmail,
Password: c.adminPassword,
}
if admin, err := userRepo.RetrieveByEmail(context.Background(), user.Email); err == nil {
// The admin is already created. Check existence of the admin policy.
_, err := auth.Authorize(context.Background(), &mainflux.AuthorizeReq{Obj: "authorities", Act: "member", Sub: admin.ID})
if err != nil {
apr, err := auth.AddPolicy(context.Background(), &mainflux.AddPolicyReq{Obj: "authorities", Act: "member", Sub: admin.ID})
if err != nil {
return err
}
if !apr.GetAuthorized() {
return errors.ErrAuthorization
}
}
return nil
}
// Add a policy that allows anybody to create a user
apr, err := auth.AddPolicy(context.Background(), &mainflux.AddPolicyReq{Obj: "user", Act: "create", Sub: "*"})
if err != nil {
return err
}
if !apr.GetAuthorized() {
return errors.ErrAuthorization
}
// Create an admin
uid, err := svc.Register(context.Background(), "", user)
if err != nil {
return err
}
apr, err = auth.AddPolicy(context.Background(), &mainflux.AddPolicyReq{Obj: "authorities", Act: "member", Sub: uid})
if err != nil {
return err
}
if !apr.GetAuthorized() {
return errors.ErrAuthorization
}
return nil
}
func startHTTPServer(ctx context.Context, tracer opentracing.Tracer, svc users.Service, port string, certFile string, keyFile string, logger logger.Logger) error {
p := fmt.Sprintf(":%s", port)
errCh := make(chan error)
server := &http.Server{Addr: p, Handler: api.MakeHandler(svc, tracer, logger)}
switch {
case certFile != "" || keyFile != "":
logger.Info(fmt.Sprintf("Users service started using https, cert %s key %s, exposed port %s", certFile, keyFile, port))
go func() {
errCh <- server.ListenAndServeTLS(certFile, keyFile)
}()
default:
logger.Info(fmt.Sprintf("Users 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("Users service error occurred during shutdown at %s: %s", p, err))
return fmt.Errorf("users service occurred during shutdown at %s: %w", p, err)
}
logger.Info(fmt.Sprintf("Users service shutdown of http at %s", p))
return nil
case err := <-errCh:
return err
}
}