refactor(server): use errgroup to supervise services (#3755)

Uses the errgroup package and pattern for supervising services like servers etc.

config.template.yml

@@ -51,13 +51,6 @@ server:
   ## Useful to allow overriding of specific static assets.
   # asset_path: /config/assets/
 
-  ## Buffers usually should be configured to be the same value.
-  ## Explanation at https://www.authelia.com/c/server#buffer-sizes
-  ## Read buffer size adjusts the server's max incoming request size in bytes.
-  ## Write buffer size does the same for outgoing responses.
-  read_buffer_size: 4096
-  write_buffer_size: 4096
-
   ## Enables the pprof endpoint.
   enable_pprof: false
 
@@ -85,6 +78,32 @@ server:
     ## The CSP Template. Read the docs.
     csp_template: ""
 
+  ## Server Buffers configuration.
+  # buffers:
+
+    ## Buffers usually should be configured to be the same value.
+    ## Explanation at https://www.authelia.com/c/server#buffer-sizes
+    ## Read buffer size adjusts the server's max incoming request size in bytes.
+    ## Write buffer size does the same for outgoing responses.
+
+    ## Read buffer.
+    # read: 4096
+
+    ## Write buffer.
+    # write: 4096
+
+  ## Server Timeouts configuration.
+  # timeouts:
+
+    ## Read timeout.
+    # read: 2s
+
+    ## Write timeout.
+    # write: 2s
+
+    ## Idle timeout.
+    # idle: 30s
+
 ##
 ## Log Configuration
 ##
@@ -116,6 +135,27 @@ telemetry:
     ## The address to listen on for metrics. This should be on a different port to the main server.port value.
     address: tcp://0.0.0.0:9959
 
+    ## Metrics Server Buffers configuration.
+    # buffers:
+
+      ## Read buffer.
+      # read: 4096
+
+      ## Write buffer.
+      # write: 4096
+
+    ## Metrics Server Timeouts configuration.
+    # timeouts:
+
+      ## Read timeout.
+      # read: 2s
+
+      ## Write timeout.
+      # write: 2s
+
+      ## Idle timeout.
+      # idle: 30s
+
 ##
 ## TOTP Configuration
 ##

docs/content/en/configuration/methods/environment.md

@@ -40,12 +40,13 @@ For example this YAML configuration:
 log:
   level: info
 server:
-  read_buffer_size: 4096
+  buffers:
+    read: 4096
 ```
 
 Can be replaced by this environment variable configuration:
 
 ```bash
 AUTHELIA_LOG_LEVEL=info
-AUTHELIA_SERVER_READ_BUFFER_SIZE=4096
+AUTHELIA_SERVER_BUFFERS_READ=4096
 ```

docs/content/en/configuration/miscellaneous/server.md

@@ -22,8 +22,6 @@ server:
   host: 0.0.0.0
   port: 9091
   path: ""
-  read_buffer_size: 4096
-  write_buffer_size: 4096
   enable_pprof: false
   enable_expvars: false
   disable_healthcheck: false
@@ -33,6 +31,13 @@ server:
     client_certificates: []
   headers:
     csp_template: ""
+  buffers:
+    read: 4096
+    write: 4096
+  timeouts:
+    read: 10s
+    write: 10s
+    idle: 10s
 ```
 
 ## Options
@@ -95,18 +100,6 @@ assets that can be overridden must be placed in the `asset_path`. The structure
 can be overriden is documented in the
 [Sever Asset Overrides Reference Guide](../../reference/guides/server-asset-overrides.md).
 
-### read_buffer_size
-
-{{< confkey type="integer " default="4096" required="no" >}}
-
-Configures the maximum request size. The default of 4096 is generally sufficient for most use cases.
-
-### write_buffer_size
-
-{{< confkey type="integer " default="4096" required="no" >}}
-
-Configures the maximum response size. The default of 4096 is generally sufficient for most use cases.
-
 ### enable_pprof
 
 {{< confkey type="boolean" default="false" required="no" >}}
@@ -174,6 +167,16 @@ about how browsers utilize and understand this header before attempting to custo
 
 For example, the default CSP template is `default-src 'self'; object-src 'none'; style-src 'self' 'nonce-${NONCE}'`.
 
+### buffers
+
+Configures the server buffers. See the [Server Buffers](../prologue/common.md#server-buffers) documentation for more
+information.
+
+### timeouts
+
+Configures the server timeouts. See the [Server Timeouts](../prologue/common.md#server-timeouts) documentation for more
+information.
+
 ## Additional Notes
 
 ### Buffer Sizes

docs/content/en/configuration/prologue/common.md

@@ -133,3 +133,46 @@ The key `minimum_version` controls the minimum TLS version Authelia will use whe
 The possible values are `TLS1.3`, `TLS1.2`, `TLS1.1`, `TLS1.0`. Anything other than `TLS1.3` or `TLS1.2`
 are very old and deprecated. You should avoid using these and upgrade your backend service instead of decreasing
 this value.
+
+## Server Buffers
+
+### read
+
+{{< confkey type="integer" default="4096" required="no" >}}
+
+Configures the maximum request size. The default of 4096 is generally sufficient for most use cases.
+
+### write
+
+{{< confkey type="integer" default="4096" required="no" >}}
+
+Configures the maximum response size. The default of 4096 is generally sufficient for most use cases.
+
+## Server Timeouts
+
+### read
+
+{{< confkey type="duration" default="2s" required="no" >}}
+
+*__Note:__ This setting uses the [duration notation format](#duration-notation-format). Please see the
+[common options](#duration-notation-format) documentation for information on this format.*
+
+Configures the server read timeout.
+
+### write
+
+{{< confkey type="duration" default="2s" required="no" >}}
+
+*__Note:__ This setting uses the [duration notation format](#duration-notation-format). Please see the
+[common options](#duration-notation-format) documentation for information on this format.*
+
+Configures the server write timeout.
+
+### idle
+
+{{< confkey type="duration" default="30s" required="no" >}}
+
+*__Note:__ This setting uses the [duration notation format](#duration-notation-format). Please see the
+[common options](#duration-notation-format) documentation for information on this format.*
+
+Configures the server write timeout.

docs/content/en/configuration/security/regulation.md

@@ -31,13 +31,13 @@ regulation:
 
 ### max_retries
 
-{{< confkey type="integer " default="3" required="no" >}}
+{{< confkey type="integer" default="3" required="no" >}}
 
 The number of failed login attempts before a user may be banned. Setting this option to 0 disables regulation entirely.
 
 ### find_time
 
-{{< confkey type="duration " default="2m" required="no" >}}
+{{< confkey type="duration" default="2m" required="no" >}}
 
 *__Note:__ This setting uses the [duration notation format](../prologue/common.md#duration-notation-format). Please see
 the [common options](../prologue/common.md#duration-notation-format) documentation for information on this format.*

docs/content/en/configuration/telemetry/metrics.md

@@ -21,6 +21,13 @@ telemetry:
   metrics:
     enabled: false
     address: "tcp://0.0.0.0:9959"
+    buffers:
+      read: 4096
+      write: 4096
+    timeouts:
+      read: 10s
+      write: 10s
+      idle: 10s
 ```
 
 ## Options
@@ -38,6 +45,16 @@ Determines if the [Prometheus] HTTP Metrics Exporter is enabled.
 Configures the listener address for the [Prometheus] HTTP Metrics Exporter. This configuration key uses the
 [Address](../prologue/common.md#address) format. The scheme must be `tcp://` or empty.
 
+### buffers
+
+Configures the server buffers. See the [Server Buffers](../prologue/common.md#server-buffers) documentation for more
+information.
+
+### timeouts
+
+Configures the server timeouts. See the [Server Timeouts](../prologue/common.md#server-timeouts) documentation for more
+information.
+
 ## See More
 
 - [Telemetry Reference Documentation](../../reference/guides/metrics.md)

docs/content/en/reference/guides/log-messages.md

@@ -15,15 +15,15 @@ toc: true
 ## Request Header Too Large
 
 The `request header too large` error with a status code of `431` indicates the HTTP request made to *Authelia* had
-headers exceeding the server [read_buffer_size](../../configuration/miscellaneous/server.md#read_buffer_size) parameter.
+headers exceeding the server [read buffer](../../configuration/miscellaneous/server.md#buffers) parameter.
 
 Usually the defaults are sufficient however some applications cause fairly large headers to be added to requests.
 
-It's suggested you increase the [read_buffer_size](../../configuration/miscellaneous/server.md#read_buffer_size)
+It's suggested you increase the [read buffer](../../configuration/miscellaneous/server.md#buffers)
 configuration option (by either doubling or quadrupling it) in order to alleviate this issue or use the reverse proxy to
 remove the excessive headers which are causing this issue.
 
-It's generally recommended the [write_buffer_size](../../configuration/miscellaneous/server.md#write_buffer_size) is
+It's generally recommended the [write buffer](../../configuration/miscellaneous/server.md#buffers) is
 also increased.
 
 ## User Has Been Inactive Too Long

go.mod

@@ -36,6 +36,7 @@ require (
 	github.com/stretchr/testify v1.8.0
 	github.com/trustelem/zxcvbn v1.0.1
 	github.com/valyala/fasthttp v1.38.0
+	golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4
 	golang.org/x/text v0.3.7
 	gopkg.in/square/go-jose.v2 v2.6.0
 	gopkg.in/yaml.v3 v3.0.1

go.sum

@@ -1587,7 +1587,8 @@ golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20220601150217-0de741cfad7f h1:Ax0t5p6N38Ga0dThY21weqDEyz2oklo4IvDkpigvkD8=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4 h1:uVc8UZUe6tr40fFVnUP5Oj+veunVezqYl9z7DYw9xzw=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180816055513-1c9583448a9c/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

internal/commands/root.go

@@ -1,13 +1,18 @@
 package commands
 
 import (
+	"context"
 	"fmt"
+	"net"
 	"os"
+	"os/signal"
 	"strings"
-	"sync"
+	"syscall"
 
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
+	"github.com/valyala/fasthttp"
+	"golang.org/x/sync/errgroup"
 
 	"github.com/authelia/authelia/v4/internal/configuration/schema"
 	"github.com/authelia/authelia/v4/internal/logging"
@@ -74,99 +79,127 @@ func cmdRootRun(_ *cobra.Command, _ []string) {
 		logger.Fatalf("Errors occurred provisioning providers.")
 	}
 
-	doStartupChecks(config, &providers)
+	doStartupChecks(config, &providers, logger)
 
 	runServers(config, providers, logger)
 }
 
-func runServers(config *schema.Configuration, providers middlewares.Providers, logger *logrus.Logger) {
-	wg := new(sync.WaitGroup)
+func runServers(config *schema.Configuration, providers middlewares.Providers, log *logrus.Logger) {
+	ctx := context.Background()
 
-	wg.Add(2)
+	ctx, cancel := context.WithCancel(ctx)
 
-	go func() {
-		err := startDefaultServer(config, providers)
-		if err != nil {
-			logger.Fatal(err)
+	defer cancel()
+
+	quit := make(chan os.Signal, 1)
+
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+
+	defer signal.Stop(quit)
+
+	g, ctx := errgroup.WithContext(ctx)
+
+	var (
+		mainServer, metricsServer     *fasthttp.Server
+		mainListener, metricsListener net.Listener
+	)
+
+	g.Go(func() (err error) {
+		defer func() {
+			if rec := recover(); rec != nil {
+				log.WithError(recoverErr(rec)).Errorf("Critical error in server caught (recovered)")
+			}
+		}()
+
+		if mainServer, mainListener, err = server.CreateDefaultServer(*config, providers); err != nil {
+			return err
 		}
 
-		wg.Done()
-	}()
-
-	go func() {
-		err := startMetricsServer(config, providers)
-		if err != nil {
-			logger.Fatal(err)
+		if err = mainServer.Serve(mainListener); err != nil {
+			return err
 		}
-	}()
 
-	wg.Wait()
-}
-
-func startDefaultServer(config *schema.Configuration, providers middlewares.Providers) (err error) {
-	svr, listener, err := server.CreateDefaultServer(*config, providers)
-
-	switch err {
-	case nil:
-		if err = svr.Serve(listener); err != nil {
-			return fmt.Errorf("error occurred during default server operation: %w", err)
-		}
-	default:
-		return fmt.Errorf("error occurred during default server startup: %w", err)
-	}
-
-	return nil
-}
-
-func startMetricsServer(config *schema.Configuration, providers middlewares.Providers) (err error) {
-	if providers.Metrics == nil {
 		return nil
-	}
+	})
 
-	svr, listener, err := server.CreateMetricsServer(config.Telemetry.Metrics)
-
-	switch err {
-	case nil:
-		if err = svr.Serve(listener); err != nil {
-			return fmt.Errorf("error occurred during metrics server operation: %w", err)
+	g.Go(func() (err error) {
+		if providers.Metrics == nil {
+			return nil
 		}
-	default:
-		return fmt.Errorf("error occurred during metrics server startup: %w", err)
+
+		defer func() {
+			if rec := recover(); rec != nil {
+				log.WithError(recoverErr(rec)).Errorf("Critical error in metrics server caught (recovered)")
+			}
+		}()
+
+		if metricsServer, metricsListener, err = server.CreateMetricsServer(config.Telemetry.Metrics); err != nil {
+			return err
+		}
+
+		if err = metricsServer.Serve(metricsListener); err != nil {
+			return err
+		}
+
+		return nil
+	})
+
+	select {
+	case <-quit:
+		break
+	case <-ctx.Done():
+		break
 	}
 
-	return nil
+	cancel()
+
+	log.Infof("Shutting down")
+
+	var err error
+
+	if err = mainServer.Shutdown(); err != nil {
+		log.WithError(err).Errorf("Error occurred shutting down the server")
+	}
+
+	if metricsServer != nil {
+		if err = metricsServer.Shutdown(); err != nil {
+			log.WithError(err).Errorf("Error occurred shutting down the metrics server")
+		}
+	}
+
+	if err = g.Wait(); err != nil {
+		log.WithError(err).Errorf("Error occurred waiting for shutdown")
+	}
 }
 
-func doStartupChecks(config *schema.Configuration, providers *middlewares.Providers) {
-	logger := logging.Logger()
-
+func doStartupChecks(config *schema.Configuration, providers *middlewares.Providers, log *logrus.Logger) {
 	var (
 		failures []string
 		err      error
 	)
 
-	if err = doStartupCheck(logger, "storage", providers.StorageProvider, false); err != nil {
-		logger.Errorf("Failure running the storage provider startup check: %+v", err)
+	if err = doStartupCheck(log, "storage", providers.StorageProvider, false); err != nil {
+		log.Errorf("Failure running the storage provider startup check: %+v", err)
 
 		failures = append(failures, "storage")
 	}
 
-	if err = doStartupCheck(logger, "user", providers.UserProvider, false); err != nil {
-		logger.Errorf("Failure running the user provider startup check: %+v", err)
+	if err = doStartupCheck(log, "user", providers.UserProvider, false); err != nil {
+		log.Errorf("Failure running the user provider startup check: %+v", err)
 
 		failures = append(failures, "user")
 	}
 
-	if err = doStartupCheck(logger, "notification", providers.Notifier, config.Notifier.DisableStartupCheck); err != nil {
-		logger.Errorf("Failure running the notification provider startup check: %+v", err)
+	if err = doStartupCheck(log, "notification", providers.Notifier, config.Notifier.DisableStartupCheck); err != nil {
+		log.Errorf("Failure running the notification provider startup check: %+v", err)
 
 		failures = append(failures, "notification")
 	}
 
 	if !config.NTP.DisableStartupCheck && !providers.Authorizer.IsSecondFactorEnabled() {
-		logger.Debug("The NTP startup check was skipped due to there being no configured 2FA access control rules")
-	} else if err = doStartupCheck(logger, "ntp", providers.NTP, config.NTP.DisableStartupCheck); err != nil {
-		logger.Errorf("Failure running the ntp provider startup check: %+v", err)
+		log.Debug("The NTP startup check was skipped due to there being no configured 2FA access control rules")
+	} else if err = doStartupCheck(log, "ntp", providers.NTP, config.NTP.DisableStartupCheck); err != nil {
+		log.Errorf("Failure running the ntp provider startup check: %+v", err)
 
 		if !config.NTP.DisableFailure {
 			failures = append(failures, "ntp")
@@ -174,7 +207,7 @@ func doStartupChecks(config *schema.Configuration, providers *middlewares.Provid
 	}
 
 	if len(failures) != 0 {
-		logger.Fatalf("The following providers had fatal failures during startup: %s", strings.Join(failures, ", "))
+		log.Fatalf("The following providers had fatal failures during startup: %s", strings.Join(failures, ", "))
 	}
 }
 

internal/commands/util.go

@@ -0,0 +1,18 @@
+package commands
+
+import (
+	"fmt"
+)
+
+func recoverErr(i interface{}) error {
+	switch v := i.(type) {
+	case nil:
+		return nil
+	case string:
+		return fmt.Errorf("recovered panic: %s", v)
+	case error:
+		return fmt.Errorf("recovered panic: %w", v)
+	default:
+		return fmt.Errorf("recovered panic with unknown type: %v", v)
+	}
+}

internal/configuration/config.template.yml

@@ -51,13 +51,6 @@ server:
   ## Useful to allow overriding of specific static assets.
   # asset_path: /config/assets/
 
-  ## Buffers usually should be configured to be the same value.
-  ## Explanation at https://www.authelia.com/c/server#buffer-sizes
-  ## Read buffer size adjusts the server's max incoming request size in bytes.
-  ## Write buffer size does the same for outgoing responses.
-  read_buffer_size: 4096
-  write_buffer_size: 4096
-
   ## Enables the pprof endpoint.
   enable_pprof: false
 
@@ -85,6 +78,32 @@ server:
     ## The CSP Template. Read the docs.
     csp_template: ""
 
+  ## Server Buffers configuration.
+  # buffers:
+
+    ## Buffers usually should be configured to be the same value.
+    ## Explanation at https://www.authelia.com/c/server#buffer-sizes
+    ## Read buffer size adjusts the server's max incoming request size in bytes.
+    ## Write buffer size does the same for outgoing responses.
+
+    ## Read buffer.
+    # read: 4096
+
+    ## Write buffer.
+    # write: 4096
+
+  ## Server Timeouts configuration.
+  # timeouts:
+
+    ## Read timeout.
+    # read: 2s
+
+    ## Write timeout.
+    # write: 2s
+
+    ## Idle timeout.
+    # idle: 30s
+
 ##
 ## Log Configuration
 ##
@@ -116,6 +135,27 @@ telemetry:
     ## The address to listen on for metrics. This should be on a different port to the main server.port value.
     address: tcp://0.0.0.0:9959
 
+    ## Metrics Server Buffers configuration.
+    # buffers:
+
+      ## Read buffer.
+      # read: 4096
+
+      ## Write buffer.
+      # write: 4096
+
+    ## Metrics Server Timeouts configuration.
+    # timeouts:
+
+      ## Read timeout.
+      # read: 2s
+
+      ## Write timeout.
+      # write: 2s
+
+      ## Idle timeout.
+      # idle: 30s
+
 ##
 ## TOTP Configuration
 ##

internal/configuration/deprecation.go

@@ -106,6 +106,13 @@ var deprecations = map[string]Deprecation{
 		AutoMap: true,
 		MapFunc: nil,
 	},
+	"storage.postgres.sslmode": {
+		Version: model.SemanticVersion{Major: 4, Minor: 36},
+		Key:     "storage.postgres.sslmode",
+		NewKey:  "storage.postgres.ssl.mode",
+		AutoMap: true,
+		MapFunc: nil,
+	},
 	"authentication_backend.disable_reset_password": {
 		Version: model.SemanticVersion{Major: 4, Minor: 36},
 		Key:     "authentication_backend.disable_reset_password",
@@ -113,4 +120,18 @@ var deprecations = map[string]Deprecation{
 		AutoMap: true,
 		MapFunc: nil,
 	},
+	"server.read_buffer_size": {
+		Version: model.SemanticVersion{Major: 4, Minor: 37},
+		Key:     "server.read_buffer_size",
+		NewKey:  "server.buffers.read",
+		AutoMap: true,
+		MapFunc: nil,
+	},
+	"server.write_buffer_size": {
+		Version: model.SemanticVersion{Major: 4, Minor: 37},
+		Key:     "server.write_buffer_size",
+		NewKey:  "server.buffers.write",
+		AutoMap: true,
+		MapFunc: nil,
+	},
 }

internal/configuration/schema/keys.go

@@ -150,7 +150,6 @@ var Keys = []string{
 	"storage.postgres.ssl.root_certificate",
 	"storage.postgres.ssl.certificate",
 	"storage.postgres.ssl.key",
-	"storage.postgres.sslmode",
 	"storage.encryption_key",
 	"notifier.disable_startup_check",
 	"notifier.filesystem.filename",
@@ -173,8 +172,6 @@ var Keys = []string{
 	"server.port",
 	"server.path",
 	"server.asset_path",
-	"server.read_buffer_size",
-	"server.write_buffer_size",
 	"server.enable_pprof",
 	"server.enable_expvars",
 	"server.disable_healthcheck",
@@ -182,8 +179,18 @@ var Keys = []string{
 	"server.tls.key",
 	"server.tls.client_certificates",
 	"server.headers.csp_template",
+	"server.buffers.read",
+	"server.buffers.write",
+	"server.timeouts.read",
+	"server.timeouts.write",
+	"server.timeouts.idle",
 	"telemetry.metrics.enabled",
 	"telemetry.metrics.address",
+	"telemetry.metrics.buffers.read",
+	"telemetry.metrics.buffers.write",
+	"telemetry.metrics.timeouts.read",
+	"telemetry.metrics.timeouts.write",
+	"telemetry.metrics.timeouts.idle",
 	"webauthn.disable",
 	"webauthn.display_name",
 	"webauthn.attestation_conveyance_preference",

internal/configuration/schema/server.go

@@ -1,19 +1,24 @@
 package schema
 
+import (
+	"time"
+)
+
 // ServerConfiguration represents the configuration of the http server.
 type ServerConfiguration struct {
 	Host               string `koanf:"host"`
 	Port               int    `koanf:"port"`
 	Path               string `koanf:"path"`
 	AssetPath          string `koanf:"asset_path"`
-	ReadBufferSize     int    `koanf:"read_buffer_size"`
-	WriteBufferSize    int    `koanf:"write_buffer_size"`
 	EnablePprof        bool   `koanf:"enable_pprof"`
 	EnableExpvars      bool   `koanf:"enable_expvars"`
 	DisableHealthcheck bool   `koanf:"disable_healthcheck"`
 
 	TLS     ServerTLSConfiguration     `koanf:"tls"`
 	Headers ServerHeadersConfiguration `koanf:"headers"`
+
+	Buffers  ServerBuffers  `koanf:"buffers"`
+	Timeouts ServerTimeouts `koanf:"timeouts"`
 }
 
 // ServerTLSConfiguration represents the configuration of the http servers TLS options.
@@ -30,8 +35,15 @@ type ServerHeadersConfiguration struct {
 
 // DefaultServerConfiguration represents the default values of the ServerConfiguration.
 var DefaultServerConfiguration = ServerConfiguration{
-	Host:            "0.0.0.0",
-	Port:            9091,
-	ReadBufferSize:  4096,
-	WriteBufferSize: 4096,
+	Host: "0.0.0.0",
+	Port: 9091,
+	Buffers: ServerBuffers{
+		Read:  4096,
+		Write: 4096,
+	},
+	Timeouts: ServerTimeouts{
+		Read:  time.Second * 2,
+		Write: time.Second * 2,
+		Idle:  time.Second * 30,
+	},
 }

internal/configuration/schema/shared.go

@@ -1,8 +1,25 @@
 package schema
 
+import (
+	"time"
+)
+
 // TLSConfig is a representation of the TLS configuration.
 type TLSConfig struct {
 	MinimumVersion string `koanf:"minimum_version"`
 	SkipVerify     bool   `koanf:"skip_verify"`
 	ServerName     string `koanf:"server_name"`
 }
+
+// ServerTimeouts represents server timeout configurations.
+type ServerTimeouts struct {
+	Read  time.Duration `koanf:"read"`
+	Write time.Duration `koanf:"write"`
+	Idle  time.Duration `koanf:"idle"`
+}
+
+// ServerBuffers represents server buffer configurations.
+type ServerBuffers struct {
+	Read  int `koanf:"read"`
+	Write int `koanf:"write"`
+}

internal/configuration/schema/storage.go

@@ -28,9 +28,6 @@ type PostgreSQLStorageConfiguration struct {
 	Schema                  string `koanf:"schema"`
 
 	SSL PostgreSQLSSLStorageConfiguration `koanf:"ssl"`
-
-	// Deprecated. TODO: Remove in v4.36.0.
-	SSLMode string `koanf:"sslmode"`
 }
 
 // PostgreSQLSSLStorageConfiguration represents the SSL configuration of a PostgreSQL database.

internal/configuration/schema/telemetry.go

@@ -2,6 +2,7 @@ package schema
 
 import (
 	"net"
+	"time"
 )
 
 // TelemetryConfig represents the telemetry config.
@@ -13,11 +14,23 @@ type TelemetryConfig struct {
 type TelemetryMetricsConfig struct {
 	Enabled bool     `koanf:"enabled"`
 	Address *Address `koanf:"address"`
+
+	Buffers  ServerBuffers  `koanf:"buffers"`
+	Timeouts ServerTimeouts `koanf:"timeouts"`
 }
 
 // DefaultTelemetryConfig is the default telemetry configuration.
 var DefaultTelemetryConfig = TelemetryConfig{
 	Metrics: TelemetryMetricsConfig{
 		Address: &Address{true, "tcp", net.ParseIP("0.0.0.0"), 9959},
+		Buffers: ServerBuffers{
+			Read:  4096,
+			Write: 4096,
+		},
+		Timeouts: ServerTimeouts{
+			Read:  time.Second * 2,
+			Write: time.Second * 2,
+			Idle:  time.Second * 30,
+		},
 	},
 }

internal/configuration/validator/const.go

@@ -247,7 +247,6 @@ const (
 
 	errFmtServerPathNoForwardSlashes = "server: option 'path' must not contain any forward slashes"
 	errFmtServerPathAlphaNum         = "server: option 'path' must only contain alpha numeric characters"
-	errFmtServerBufferSize           = "server: option '%s_buffer_size' must be above 0 but it is configured as '%d'"
 )
 
 const (

internal/configuration/validator/server.go

@@ -70,15 +70,23 @@ func ValidateServer(config *schema.Configuration, validator *schema.StructValida
 		config.Server.Path = path.Clean("/" + config.Server.Path)
 	}
 
-	if config.Server.ReadBufferSize == 0 {
-		config.Server.ReadBufferSize = schema.DefaultServerConfiguration.ReadBufferSize
-	} else if config.Server.ReadBufferSize < 0 {
-		validator.Push(fmt.Errorf(errFmtServerBufferSize, "read", config.Server.ReadBufferSize))
+	if config.Server.Buffers.Read <= 0 {
+		config.Server.Buffers.Read = schema.DefaultServerConfiguration.Buffers.Read
 	}
 
-	if config.Server.WriteBufferSize == 0 {
-		config.Server.WriteBufferSize = schema.DefaultServerConfiguration.WriteBufferSize
-	} else if config.Server.WriteBufferSize < 0 {
-		validator.Push(fmt.Errorf(errFmtServerBufferSize, "write", config.Server.WriteBufferSize))
+	if config.Server.Buffers.Write <= 0 {
+		config.Server.Buffers.Write = schema.DefaultServerConfiguration.Buffers.Write
+	}
+
+	if config.Server.Timeouts.Read <= 0 {
+		config.Server.Timeouts.Read = schema.DefaultServerConfiguration.Timeouts.Read
+	}
+
+	if config.Server.Timeouts.Write <= 0 {
+		config.Server.Timeouts.Write = schema.DefaultServerConfiguration.Timeouts.Write
+	}
+
+	if config.Server.Timeouts.Idle <= 0 {
+		config.Server.Timeouts.Idle = schema.DefaultServerConfiguration.Timeouts.Idle
 	}
 }

internal/configuration/validator/server_test.go

@@ -3,6 +3,7 @@ package validator
 import (
 	"os"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -23,8 +24,8 @@ func TestShouldSetDefaultServerValues(t *testing.T) {
 
 	assert.Equal(t, schema.DefaultServerConfiguration.Host, config.Server.Host)
 	assert.Equal(t, schema.DefaultServerConfiguration.Port, config.Server.Port)
-	assert.Equal(t, schema.DefaultServerConfiguration.ReadBufferSize, config.Server.ReadBufferSize)
-	assert.Equal(t, schema.DefaultServerConfiguration.WriteBufferSize, config.Server.WriteBufferSize)
+	assert.Equal(t, schema.DefaultServerConfiguration.Buffers.Read, config.Server.Buffers.Read)
+	assert.Equal(t, schema.DefaultServerConfiguration.Buffers.Write, config.Server.Buffers.Write)
 	assert.Equal(t, schema.DefaultServerConfiguration.TLS.Key, config.Server.TLS.Key)
 	assert.Equal(t, schema.DefaultServerConfiguration.TLS.Certificate, config.Server.TLS.Certificate)
 	assert.Equal(t, schema.DefaultServerConfiguration.Path, config.Server.Path)
@@ -41,8 +42,8 @@ func TestShouldSetDefaultConfig(t *testing.T) {
 	assert.Len(t, validator.Errors(), 0)
 	assert.Len(t, validator.Warnings(), 0)
 
-	assert.Equal(t, schema.DefaultServerConfiguration.ReadBufferSize, config.Server.ReadBufferSize)
-	assert.Equal(t, schema.DefaultServerConfiguration.WriteBufferSize, config.Server.WriteBufferSize)
+	assert.Equal(t, schema.DefaultServerConfiguration.Buffers.Read, config.Server.Buffers.Read)
+	assert.Equal(t, schema.DefaultServerConfiguration.Buffers.Write, config.Server.Buffers.Write)
 }
 
 func TestShouldParsePathCorrectly(t *testing.T) {
@@ -61,21 +62,32 @@ func TestShouldParsePathCorrectly(t *testing.T) {
 	assert.Equal(t, "/apple", config.Server.Path)
 }
 
-func TestShouldRaiseOnNegativeValues(t *testing.T) {
+func TestShouldDefaultOnNegativeValues(t *testing.T) {
 	validator := schema.NewStructValidator()
 	config := &schema.Configuration{
 		Server: schema.ServerConfiguration{
-			ReadBufferSize:  -1,
-			WriteBufferSize: -1,
+			Buffers: schema.ServerBuffers{
+				Read:  -1,
+				Write: -1,
+			},
+			Timeouts: schema.ServerTimeouts{
+				Read:  time.Second * -1,
+				Write: time.Second * -1,
+				Idle:  time.Second * -1,
+			},
 		},
 	}
 
 	ValidateServer(config, validator)
 
-	require.Len(t, validator.Errors(), 2)
+	require.Len(t, validator.Errors(), 0)
 
-	assert.EqualError(t, validator.Errors()[0], "server: option 'read_buffer_size' must be above 0 but it is configured as '-1'")
-	assert.EqualError(t, validator.Errors()[1], "server: option 'write_buffer_size' must be above 0 but it is configured as '-1'")
+	assert.Equal(t, schema.DefaultServerConfiguration.Buffers.Read, config.Server.Buffers.Read)
+	assert.Equal(t, schema.DefaultServerConfiguration.Buffers.Write, config.Server.Buffers.Write)
+
+	assert.Equal(t, schema.DefaultServerConfiguration.Timeouts.Read, config.Server.Timeouts.Read)
+	assert.Equal(t, schema.DefaultServerConfiguration.Timeouts.Write, config.Server.Timeouts.Write)
+	assert.Equal(t, schema.DefaultServerConfiguration.Timeouts.Idle, config.Server.Timeouts.Idle)
 }
 
 func TestShouldRaiseOnNonAlphanumericCharsInPath(t *testing.T) {

internal/configuration/validator/storage.go

@@ -56,11 +56,6 @@ func validatePostgreSQLConfiguration(config *schema.PostgreSQLStorageConfigurati
 		config.Schema = schema.DefaultPostgreSQLStorageConfiguration.Schema
 	}
 
-	// Deprecated. TODO: Remove in v4.36.0.
-	if config.SSLMode != "" && config.SSL.Mode == "" {
-		config.SSL.Mode = config.SSLMode
-	}
-
 	if config.SSL.Mode == "" {
 		config.SSL.Mode = schema.DefaultPostgreSQLStorageConfiguration.SSL.Mode
 	} else if !utils.IsStringInSlice(config.SSL.Mode, validStoragePostgreSQLSSLModes) {

internal/configuration/validator/storage_test.go

@@ -166,26 +166,6 @@ func (suite *StorageSuite) TestShouldValidatePostgresSSLModeMustBeValid() {
 	suite.Assert().EqualError(suite.validator.Errors()[0], "storage: postgres: ssl: option 'mode' must be one of 'disable', 'require', 'verify-ca', 'verify-full' but it is configured as 'unknown'")
 }
 
-// Deprecated. TODO: Remove in v4.36.0.
-func (suite *StorageSuite) TestShouldValidatePostgresSSLModeMustBeMappedForDeprecations() {
-	suite.config.PostgreSQL = &schema.PostgreSQLStorageConfiguration{
-		SQLStorageConfiguration: schema.SQLStorageConfiguration{
-			Host:     "pg",
-			Username: "myuser",
-			Password: "pass",
-			Database: "database",
-		},
-		SSLMode: "require",
-	}
-
-	ValidateStorage(suite.config, suite.validator)
-
-	suite.Assert().Len(suite.validator.Warnings(), 0)
-	suite.Assert().Len(suite.validator.Errors(), 0)
-
-	suite.Assert().Equal(suite.config.PostgreSQL.SSL.Mode, "require")
-}
-
 func (suite *StorageSuite) TestShouldRaiseErrorOnNoEncryptionKey() {
 	suite.config.EncryptionKey = ""
 	suite.config.Local = &schema.LocalStorageConfiguration{

internal/configuration/validator/telemetry.go

@@ -22,4 +22,24 @@ func ValidateTelemetry(config *schema.Configuration, validator *schema.StructVal
 	if config.Telemetry.Metrics.Address.Port == 0 {
 		config.Telemetry.Metrics.Address.Port = schema.DefaultTelemetryConfig.Metrics.Address.Port
 	}
+
+	if config.Telemetry.Metrics.Buffers.Read <= 0 {
+		config.Telemetry.Metrics.Buffers.Read = schema.DefaultTelemetryConfig.Metrics.Buffers.Read
+	}
+
+	if config.Telemetry.Metrics.Buffers.Write <= 0 {
+		config.Telemetry.Metrics.Buffers.Write = schema.DefaultTelemetryConfig.Metrics.Buffers.Write
+	}
+
+	if config.Telemetry.Metrics.Timeouts.Read <= 0 {
+		config.Telemetry.Metrics.Timeouts.Read = schema.DefaultTelemetryConfig.Metrics.Timeouts.Read
+	}
+
+	if config.Telemetry.Metrics.Timeouts.Write <= 0 {
+		config.Telemetry.Metrics.Timeouts.Write = schema.DefaultTelemetryConfig.Metrics.Timeouts.Write
+	}
+
+	if config.Telemetry.Metrics.Timeouts.Idle <= 0 {
+		config.Telemetry.Metrics.Timeouts.Idle = schema.DefaultTelemetryConfig.Metrics.Timeouts.Idle
+	}
 }

internal/server/const.go

@@ -74,3 +74,12 @@ const (
 	cspDefaultTemplate  = "default-src 'self'%s; frame-src 'none'; object-src 'none'; style-src 'self' 'nonce-%s'; frame-ancestors 'none'; base-uri 'self'"
 	cspNoncePlaceholder = "${NONCE}"
 )
+
+const (
+	connNonTLS = "non-TLS"
+	connTLS    = "TLS"
+)
+
+const (
+	fmtLogServerInit = "Initializing %s for %s connections on '%s' path '%s'"
+)

internal/server/server.go

@@ -7,6 +7,7 @@ import (
 	"net"
 	"os"
 	"strconv"
+	"strings"
 
 	"github.com/valyala/fasthttp"
 
@@ -21,8 +22,11 @@ func CreateDefaultServer(config schema.Configuration, providers middlewares.Prov
 		ErrorHandler:          handleError(),
 		Handler:               handleRouter(config, providers),
 		NoDefaultServerHeader: true,
-		ReadBufferSize:        config.Server.ReadBufferSize,
-		WriteBufferSize:       config.Server.WriteBufferSize,
+		ReadBufferSize:        config.Server.Buffers.Read,
+		WriteBufferSize:       config.Server.Buffers.Write,
+		ReadTimeout:           config.Server.Timeouts.Read,
+		WriteTimeout:          config.Server.Timeouts.Write,
+		IdleTimeout:           config.Server.Timeouts.Idle,
 	}
 
 	address := net.JoinHostPort(config.Server.Host, strconv.Itoa(config.Server.Port))
@@ -33,7 +37,7 @@ func CreateDefaultServer(config schema.Configuration, providers middlewares.Prov
 	)
 
 	if config.Server.TLS.Certificate != "" && config.Server.TLS.Key != "" {
-		connectionType, connectionScheme = "TLS", schemeHTTPS
+		connectionType, connectionScheme = connTLS, schemeHTTPS
 
 		if err = server.AppendCert(config.Server.TLS.Certificate, config.Server.TLS.Key); err != nil {
 			return nil, nil, fmt.Errorf("unable to load tls server certificate '%s' or private key '%s': %w", config.Server.TLS.Certificate, config.Server.TLS.Key, err)
@@ -62,7 +66,7 @@ func CreateDefaultServer(config schema.Configuration, providers middlewares.Prov
 			return nil, nil, fmt.Errorf("unable to initialize tcp listener: %w", err)
 		}
 	} else {
-		connectionType, connectionScheme = "non-TLS", schemeHTTP
+		connectionType, connectionScheme = connNonTLS, schemeHTTP
 
 		if listener, err = net.Listen("tcp", address); err != nil {
 			return nil, nil, fmt.Errorf("unable to initialize tcp listener: %w", err)
@@ -74,14 +78,14 @@ func CreateDefaultServer(config schema.Configuration, providers middlewares.Prov
 		return nil, nil, fmt.Errorf("unable to configure healthcheck: %w", err)
 	}
 
-	logger := logging.Logger()
+	paths := []string{"/"}
 
-	if config.Server.Path == "" {
-		logger.Infof("Initializing server for %s connections on '%s' path '/'", connectionType, listener.Addr().String())
-	} else {
-		logger.Infof("Initializing server for %s connections on '%s' paths '/' and '%s'", connectionType, listener.Addr().String(), config.Server.Path)
+	if config.Server.Path != "" {
+		paths = append(paths, config.Server.Path)
 	}
 
+	logging.Logger().Infof(fmtLogServerInit, "server", connectionType, listener.Addr().String(), strings.Join(paths, "' and '"))
+
 	return server, listener, nil
 }
 
@@ -95,7 +99,14 @@ func CreateMetricsServer(config schema.TelemetryMetricsConfig) (server *fasthttp
 		ErrorHandler:          handleError(),
 		NoDefaultServerHeader: true,
 		Handler:               handleMetrics(),
+		ReadBufferSize:        config.Buffers.Read,
+		WriteBufferSize:       config.Buffers.Write,
+		ReadTimeout:           config.Timeouts.Read,
+		WriteTimeout:          config.Timeouts.Write,
+		IdleTimeout:           config.Timeouts.Idle,
 	}
 
+	logging.Logger().Infof(fmtLogServerInit, "server (metrics)", connNonTLS, listener.Addr().String(), "/metrics")
+
 	return server, listener, nil
 }

internal/server/server_test.go

@@ -192,7 +192,6 @@ func TestShouldRaiseErrorWhenClientDoesNotSkipVerify(t *testing.T) {
 
 	defer tlsServerContext.Close()
 
-	fmt.Println(tlsServerContext.Port())
 	req, err := http.NewRequest("GET", fmt.Sprintf("https://local.example.com:%d", tlsServerContext.Port()), nil)
 	require.NoError(t, err)