diff --git a/cmd/dex/serve.go b/cmd/dex/serve.go index 634e2606..7afb8851 100644 --- a/cmd/dex/serve.go +++ b/cmd/dex/serve.go @@ -11,10 +11,12 @@ import ( "net/http" "os" "strings" + "syscall" "time" "github.com/ghodss/yaml" grpcprometheus "github.com/grpc-ecosystem/go-grpc-prometheus" + "github.com/oklog/run" "github.com/prometheus/client_golang/prometheus" "github.com/prometheus/client_golang/prometheus/promhttp" "github.com/sirupsen/logrus" @@ -68,6 +70,27 @@ func commandServe() *cobra.Command { return cmd } +func listenAndShutdownGracefully(logger log.Logger, gr *run.Group, srv *http.Server, name string) error { + l, err := net.Listen("tcp", srv.Addr) + if err != nil { + return fmt.Errorf("listening (%s) on %s: %v", name, srv.Addr, err) + } + + gr.Add(func() error { + logger.Infof("listening (%s) on %s", name, srv.Addr) + return srv.Serve(l) + }, func(err error) { + ctx, cancel := context.WithTimeout(context.Background(), time.Minute) + defer cancel() + + logger.Debugf("starting graceful shutdown (%s)", name) + if err := srv.Shutdown(ctx); err != nil { + logger.Errorf("graceful shutdown (%s): %v", name, err) + } + }) + return nil +} + func runServe(options serveOptions) error { configFile := options.config configData, err := ioutil.ReadFile(configFile) @@ -302,21 +325,25 @@ func runServe(options serveOptions) error { telemetryServ := http.NewServeMux() telemetryServ.Handle("/metrics", promhttp.HandlerFor(prometheusRegistry, promhttp.HandlerOpts{})) - errc := make(chan error, 3) + var gr run.Group if c.Telemetry.HTTP != "" { - logger.Infof("listening (http/telemetry) on %s", c.Telemetry.HTTP) - go func() { - err := http.ListenAndServe(c.Telemetry.HTTP, telemetryServ) - errc <- fmt.Errorf("listening on %s failed: %v", c.Telemetry.HTTP, err) - }() + telemetrySrv := &http.Server{Addr: c.Telemetry.HTTP, Handler: telemetryServ} + + defer telemetrySrv.Close() + if err := listenAndShutdownGracefully(logger, &gr, telemetrySrv, "http/telemetry"); err != nil { + return err + } } + if c.Web.HTTP != "" { - logger.Infof("listening (http) on %s", c.Web.HTTP) - go func() { - err := http.ListenAndServe(c.Web.HTTP, serv) - errc <- fmt.Errorf("listening on %s failed: %v", c.Web.HTTP, err) - }() + httpSrv := &http.Server{Addr: c.Web.HTTP, Handler: serv} + + defer httpSrv.Close() + if err := listenAndShutdownGracefully(logger, &gr, httpSrv, "http"); err != nil { + return err + } } + if c.Web.HTTPS != "" { httpsSrv := &http.Server{ Addr: c.Web.HTTPS, @@ -328,34 +355,44 @@ func runServe(options serveOptions) error { }, } - logger.Infof("listening (https) on %s", c.Web.HTTPS) - go func() { - err = httpsSrv.ListenAndServeTLS(c.Web.TLSCert, c.Web.TLSKey) - errc <- fmt.Errorf("listening on %s failed: %v", c.Web.HTTPS, err) - }() - } - if c.GRPC.Addr != "" { - logger.Infof("listening (grpc) on %s", c.GRPC.Addr) - go func() { - errc <- func() error { - list, err := net.Listen("tcp", c.GRPC.Addr) - if err != nil { - return fmt.Errorf("listening on %s failed: %v", c.GRPC.Addr, err) - } - s := grpc.NewServer(grpcOptions...) - api.RegisterDexServer(s, server.NewAPI(serverConfig.Storage, logger)) - grpcMetrics.InitializeMetrics(s) - if c.GRPC.Reflection { - logger.Info("enabling reflection in grpc service") - reflection.Register(s) - } - err = s.Serve(list) - return fmt.Errorf("listening on %s failed: %v", c.GRPC.Addr, err) - }() - }() + defer httpsSrv.Close() + if err := listenAndShutdownGracefully(logger, &gr, httpsSrv, "https"); err != nil { + return err + } } - return <-errc + if c.GRPC.Addr != "" { + grpcListener, err := net.Listen("tcp", c.GRPC.Addr) + if err != nil { + return fmt.Errorf("listening (grcp) on %s: %w", c.GRPC.Addr, err) + } + + grpcSrv := grpc.NewServer(grpcOptions...) + api.RegisterDexServer(grpcSrv, server.NewAPI(serverConfig.Storage, logger)) + + grpcMetrics.InitializeMetrics(grpcSrv) + if c.GRPC.Reflection { + logger.Info("enabling reflection in grpc service") + reflection.Register(grpcSrv) + } + + gr.Add(func() error { + logger.Infof("listening (grpc) on %s", c.GRPC.Addr) + return grpcSrv.Serve(grpcListener) + }, func(err error) { + logger.Debugf("starting graceful shutdown (grpc)") + grpcSrv.GracefulStop() + }) + } + + gr.Add(run.SignalHandler(context.Background(), os.Interrupt, syscall.SIGTERM)) + if err := gr.Run(); err != nil { + if _, ok := err.(run.SignalError); !ok { + return fmt.Errorf("run groups: %w", err) + } + logger.Infof("%v, shutdown now", err) + } + return nil } var ( diff --git a/go.mod b/go.mod index 8a73117c..2b279879 100644 --- a/go.mod +++ b/go.mod @@ -18,6 +18,7 @@ require ( github.com/lib/pq v1.9.0 github.com/mattermost/xml-roundtrip-validator v0.0.0-20201219040909-8fd2afad43d1 github.com/mattn/go-sqlite3 v1.14.6 + github.com/oklog/run v1.1.0 github.com/pkg/errors v0.9.1 github.com/prometheus/client_golang v1.4.0 github.com/russellhaering/goxmldsig v1.1.0 diff --git a/go.sum b/go.sum index b5c0804e..1147f6e5 100644 --- a/go.sum +++ b/go.sum @@ -253,6 +253,8 @@ github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3Rllmb github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c h1:nXxl5PrvVm2L/wCy8dQu6DMTwH4oIuGN8GJDAlqDdVE= github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc= github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U= +github.com/oklog/run v1.1.0 h1:GEenZ1cK0+q0+wsJew9qUg/DyD8k3JzYsZAi5gYi2mA= +github.com/oklog/run v1.1.0/go.mod h1:sVPdnTZT1zYwAJeCMu2Th4T21pA3FPOQRfWjQlk7DVU= github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U= github.com/olekukonko/tablewriter v0.0.0-20170122224234-a0225b3f23b5/go.mod h1:vsDQFd/mU46D+Z4whnwzcISnGGzXWMclvtLoiIKAKIo= github.com/onsi/ginkgo v1.4.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=