Merge current v2.8 into master

.github/workflows/validate.yaml

@@ -7,7 +7,7 @@ on:
 
 env:
   GO_VERSION: 1.19
-  GOLANGCI_LINT_VERSION: v1.48.0
+  GOLANGCI_LINT_VERSION: v1.49.0
   MISSSPELL_VERSION: v0.3.4
   IN_DOCKER: ""
 

.golangci.toml

@@ -119,7 +119,12 @@
     "interfacer", # Deprecated
     "maligned", # Deprecated
     "golint", # Deprecated
+    "exhaustivestruct",# Deprecated
     "nosnakecase", # Deprecated
+    "ifshort", # Deprecated
+    "structcheck", # Deprecated
+    "varcheck", # Deprecated
+    "deadcode", # Deprecated
     "execinquery", # Not relevant (SQL)
     "sqlclosecheck", # Not relevant (SQL)
     "rowserrcheck", # Not relevant (SQL)
@@ -130,7 +135,6 @@
     "nestif", # Too many false-positive.
     "prealloc", # Too many false-positive.
     "makezero", # Not relevant
-    "ifshort", # Not relevant
     "dupl", # Too strict
     "gosec", # Too strict
     "gochecknoinits",
@@ -143,14 +147,11 @@
     "tparallel", # Not relevant
     "paralleltest", # Not relevant
     "exhaustive", # Not relevant
-    "exhaustivestruct", # Not relevant
     "exhaustruct", # duplicate of exhaustivestruct
     "goerr113", # Too strict
     "wrapcheck", # Too strict
     "noctx", # Too strict
     "bodyclose", # Too many false-positive and panics.
-    "unparam", # Too strict
-    "godox", # Too strict
     "forcetypeassert", # Too strict
     "tagliatelle", # Not compatible with current tags.
     "varnamelen", # not relevant
@@ -160,7 +161,6 @@
     "containedctx", # too many false-positive
     "maintidx", # kind of duplicate of gocyclo
     "nonamedreturns", # not relevant
-    "structcheck", # duplicate of unused
   ]
 
 [issues]
@@ -182,6 +182,10 @@
  [[issues.exclude-rules]]
     path = "(.+)_test.go"
     linters = ["goconst", "funlen", "godot", "nosnakecase"]
+ [[issues.exclude-rules]]
+    path = "(.+)_test.go"
+    text = " always receives "
+    linters = [ "unparam" ]
  [[issues.exclude-rules]]
     path = "integration/.+_test.go"
     text = "Error return value of `cmd\\.Process\\.Kill` is not checked"
@@ -230,4 +234,13 @@
  [[issues.exclude-rules]]
     path = "pkg/types/tls_test.go"
     text = "SA1019: tlsConfig.RootCAs.Subjects has been deprecated since Go 1.18"
+ [[issues.exclude-rules]]
+    path = "pkg/provider/kubernetes/(crd|gateway)/client.go"
+    linters = ["interfacebloat"]
+ [[issues.exclude-rules]]
+    path = "pkg/metrics/metrics.go"
+    linters = ["interfacebloat"]
+ [[issues.exclude-rules]]
+    path = "pkg/provider/acme/provider.go"
+    text = "\\(\\*Provider\\)\\.resolveCertificate - result 0 \\(\\*github.com/go-acme/lego/v4/certificate.Resource\\) is never used"
 

.semaphore/semaphore.yml

@@ -25,7 +25,7 @@ global_job_config:
       - export "PATH=${GOPATH}/bin:${PATH}"
       - mkdir -vp "${SEMAPHORE_GIT_DIR}" "${GOPATH}/bin"
       - export GOPROXY=https://proxy.golang.org,direct
-      - curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b "${GOPATH}/bin" v1.48.0
+      - curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b "${GOPATH}/bin" v1.49.0
       - curl -sSfL https://gist.githubusercontent.com/traefiker/6d7ac019c11d011e4f131bb2cca8900e/raw/goreleaser.sh | bash -s -- -b "${GOPATH}/bin"
       - checkout
       - cache restore traefik-$(checksum go.sum)

build.Dockerfile

@@ -13,7 +13,7 @@ RUN mkdir -p /usr/local/bin \
     | tar -xzC /usr/local/bin --transform 's#^.+/##x'
 
 # Download golangci-lint binary to bin folder in $GOPATH
-RUN curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | bash -s -- -b $GOPATH/bin v1.48.0
+RUN curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | bash -s -- -b $GOPATH/bin v1.49.0
 
 # Download misspell binary to bin folder in $GOPATH
 RUN curl -sfL https://raw.githubusercontent.com/client9/misspell/master/install-misspell.sh | bash -s -- -b $GOPATH/bin v0.3.4

cmd/healthcheck/healthcheck.go

@@ -64,7 +64,7 @@ func Do(staticConfiguration static.Configuration) (*http.Response, error) {
 	client := &http.Client{Timeout: 5 * time.Second}
 	protocol := "http"
 
-	// FIXME Handle TLS on ping etc...
+	// TODO Handle TLS on ping etc...
 	// if pingEntryPoint.TLS != nil {
 	// 	protocol = "https"
 	// 	tr := &http.Transport{

cmd/internal/gen/centrifuge.go

@@ -72,22 +72,16 @@ func NewCentrifuge(rootPkg string) (*Centrifuge, error) {
 
 // Run runs the code extraction and the code generation.
 func (c Centrifuge) Run(dest string, pkgName string) error {
-	files, err := c.run(c.pkg.Scope(), c.rootPkg, pkgName)
+	files := c.run(c.pkg.Scope(), c.rootPkg, pkgName)
-	if err != nil {
-		return err
-	}
 
-	err = fileWriter{baseDir: dest}.Write(files)
+	err := fileWriter{baseDir: dest}.Write(files)
 	if err != nil {
 		return err
 	}
 
 	for _, p := range c.pkg.Imports() {
 		if contains(c.IncludedImports, p.Path()) {
-			fls, err := c.run(p.Scope(), p.Path(), p.Name())
+			fls := c.run(p.Scope(), p.Path(), p.Name())
-			if err != nil {
-				return err
-			}
 
 			err = fileWriter{baseDir: filepath.Join(dest, p.Name())}.Write(fls)
 			if err != nil {
@@ -99,7 +93,7 @@ func (c Centrifuge) Run(dest string, pkgName string) error {
 	return err
 }
 
-func (c Centrifuge) run(sc *types.Scope, rootPkg string, pkgName string) (map[string]*File, error) {
+func (c Centrifuge) run(sc *types.Scope, rootPkg string, pkgName string) map[string]*File {
 	files := map[string]*File{}
 
 	for _, name := range sc.Names() {
@@ -158,7 +152,7 @@ func (c Centrifuge) run(sc *types.Scope, rootPkg string, pkgName string) (map[st
 		}
 	}
 
-	return files, nil
+	return files
 }
 
 func (c Centrifuge) writeStruct(name string, obj *types.Struct, rootPkg string, elt *File) string {

docs/content/https/acme.md

@@ -342,7 +342,7 @@ For complete details, refer to your provider's _Additional configuration_ link.
 | [IBM Cloud (SoftLayer)](https://www.ibm.com/cloud/)                                                | `ibmcloud`     | `SOFTLAYER_USERNAME`, `SOFTLAYER_API_KEY`                                                                                                   | [Additional configuration](https://go-acme.github.io/lego/dns/ibmcloud)     |
 | [IIJ DNS Platform Service](https://www.iij.ad.jp)                                                  | `iijdpf`       | `IIJ_DPF_API_TOKEN` , `IIJ_DPF_DPM_SERVICE_CODE`                                                                                            | [Additional configuration](https://go-acme.github.io/lego/dns/iijdpf)       |
 | [IIJ](https://www.iij.ad.jp/)                                                                      | `iij`          | `IIJ_API_ACCESS_KEY`, `IIJ_API_SECRET_KEY`, `IIJ_DO_SERVICE_CODE`                                                                           | [Additional configuration](https://go-acme.github.io/lego/dns/iij)          |
-| [Infoblox](https://www.infoblox.com/)                                                              | `infoblox`     | `INFOBLOX_USER`, `INFOBLOX_PASSWORD`, `INFOBLOX_HOST`                                                                                       | [Additional configuration](https://go-acme.github.io/lego/dns/infoblox)     |
+| [Infoblox](https://www.infoblox.com/)                                                              | `infoblox`     | `INFOBLOX_USERNAME`, `INFOBLOX_PASSWORD`, `INFOBLOX_HOST`                                                                                   | [Additional configuration](https://go-acme.github.io/lego/dns/infoblox)     |
 | [Infomaniak](https://www.infomaniak.com)                                                           | `infomaniak`   | `INFOMANIAK_ACCESS_TOKEN`                                                                                                                   | [Additional configuration](https://go-acme.github.io/lego/dns/infomaniak)   |
 | [Internet.bs](https://internetbs.net)                                                              | `internetbs`   | `INTERNET_BS_API_KEY`, `INTERNET_BS_PASSWORD`                                                                                               | [Additional configuration](https://go-acme.github.io/lego/dns/internetbs)   |
 | [INWX](https://www.inwx.de/en)                                                                     | `inwx`         | `INWX_USERNAME`, `INWX_PASSWORD`                                                                                                            | [Additional configuration](https://go-acme.github.io/lego/dns/inwx)         |

docs/content/routing/services/index.md

@@ -678,7 +678,7 @@ metadata:
   name: myca
 
   data:
-    tls.crt: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCi0tLS0tRU5EIENFUlRJRklDQVRFLS0tLS0=
+    ca.crt: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCi0tLS0tRU5EIENFUlRJRklDQVRFLS0tLS0=
 ```
 
 #### `maxIdleConnsPerHost`

go.mod

@@ -55,7 +55,7 @@ require (
 	github.com/sirupsen/logrus v1.8.1
 	github.com/stretchr/testify v1.8.0
 	github.com/stvp/go-udp-testing v0.0.0-20191102171040-06b61409b154
-	github.com/traefik/paerser v0.1.8
+	github.com/traefik/paerser v0.1.9
 	github.com/traefik/yaegi v0.14.1
 	github.com/uber/jaeger-client-go v2.30.0+incompatible
 	github.com/uber/jaeger-lib v2.2.0+incompatible

go.sum

@@ -1903,8 +1903,8 @@ github.com/tonistiigi/units v0.0.0-20180711220420-6950e57a87ea h1:SXhTLE6pb6eld/
 github.com/tonistiigi/units v0.0.0-20180711220420-6950e57a87ea/go.mod h1:WPnis/6cRcDZSUvVmezrxJPkiO87ThFYsoUiMwWNDJk=
 github.com/tonistiigi/vt100 v0.0.0-20190402012908-ad4c4a574305 h1:y/1cL5AL2oRcfzz8CAHHhR6kDDfIOT0WEyH5k40sccM=
 github.com/tonistiigi/vt100 v0.0.0-20190402012908-ad4c4a574305/go.mod h1:gXOLibKqQTRAVuVZ9gX7G9Ykky8ll8yb4slxsEMoY0c=
-github.com/traefik/paerser v0.1.8 h1:DmX/v9KwWAFvRr5A/XQzLLfd1BSWgh710q+dZJmjZ+c=
+github.com/traefik/paerser v0.1.9 h1:x5hZafOt/yogLvr6upoSOYIAn2nh2GsnLb236MOzd4I=
-github.com/traefik/paerser v0.1.8/go.mod h1:Dk3Bfz6Zyj13/S8pJyRdx/FNvXlsVRVbtp0UK4ZSiA0=
+github.com/traefik/paerser v0.1.9/go.mod h1:Dk3Bfz6Zyj13/S8pJyRdx/FNvXlsVRVbtp0UK4ZSiA0=
 github.com/traefik/yaegi v0.14.1 h1:t0ssyzeZCWTFGd/JnVuDxH/slMQfYg+2CDD4dLW/rU0=
 github.com/traefik/yaegi v0.14.1/go.mod h1:AVRxhaI2G+nUsaM1zyktzwXn69G3t/AuTDrCiTds9p0=
 github.com/transip/gotransip/v6 v6.6.1 h1:nsCU1ErZS5G0FeOpgGXc4FsWvBff9GPswSMggsC4564=

integration/consul_catalog_test.go

@@ -603,7 +603,7 @@ func (s *ConsulCatalogSuite) TestConsulServiceWithOneMissingLabels(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	req.Host = "my.super.host"
 
-	// FIXME Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
+	// TODO Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
 	// TODO validate : run on 80
 	// Expected a 404 as we did not configure anything
 	err = try.Request(req, 1500*time.Millisecond, try.StatusCodeIs(http.StatusNotFound))
@@ -681,7 +681,7 @@ func (s *ConsulCatalogSuite) TestConsulServiceWithHealthCheck(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	req.Host = "whoami"
 
-	// FIXME Need to wait for up to 10 seconds (for consul discovery or traefik to boot up ?)
+	// TODO Need to wait for up to 10 seconds (for consul discovery or traefik to boot up ?)
 	err = try.Request(req, 10*time.Second, try.StatusCodeIs(200), try.BodyContainsOr("Hostname: whoami2"))
 	c.Assert(err, checker.IsNil)
 

integration/docker_test.go

@@ -78,7 +78,7 @@ func (s *DockerSuite) TestDefaultDockerContainers(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	req.Host = fmt.Sprintf("simple-%s.docker.localhost", s.composeProject.Name)
 
-	// FIXME Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
+	// TODO Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
 	resp, err := try.ResponseUntilStatusCode(req, 1500*time.Millisecond, http.StatusOK)
 	c.Assert(err, checker.IsNil)
 
@@ -147,7 +147,7 @@ func (s *DockerSuite) TestDockerContainersWithLabels(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	req.Host = "my-super.host"
 
-	// FIXME Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
+	// TODO Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
 	_, err = try.ResponseUntilStatusCode(req, 1500*time.Millisecond, http.StatusOK)
 	c.Assert(err, checker.IsNil)
 
@@ -155,7 +155,7 @@ func (s *DockerSuite) TestDockerContainersWithLabels(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	req.Host = "my.super.host"
 
-	// FIXME Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
+	// TODO Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
 	resp, err := try.ResponseUntilStatusCode(req, 1500*time.Millisecond, http.StatusOK)
 	c.Assert(err, checker.IsNil)
 
@@ -194,7 +194,7 @@ func (s *DockerSuite) TestDockerContainersWithOneMissingLabels(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	req.Host = "my.super.host"
 
-	// FIXME Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
+	// TODO Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
 	// TODO validate : run on 80
 	// Expected a 404 as we did not configure anything
 	err = try.Request(req, 1500*time.Millisecond, try.StatusCodeIs(http.StatusNotFound))
@@ -227,7 +227,7 @@ func (s *DockerSuite) TestRestartDockerContainers(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	req.Host = "my.super.host"
 
-	// FIXME Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
+	// TODO Need to wait than 500 milliseconds more (for swarm or traefik to boot up ?)
 	resp, err := try.ResponseUntilStatusCode(req, 1500*time.Millisecond, http.StatusOK)
 	c.Assert(err, checker.IsNil)
 

integration/integration_test.go

@@ -209,14 +209,14 @@ func (s *BaseSuite) traefikCmd(args ...string) (*exec.Cmd, func(*check.C)) {
 	cmd, out := s.cmdTraefik(args...)
 	return cmd, func(c *check.C) {
 		if c.Failed() || *showLog {
-			s.displayLogK3S(c)
+			s.displayLogK3S()
 			s.displayLogCompose(c)
 			s.displayTraefikLog(c, out)
 		}
 	}
 }
 
-func (s *BaseSuite) displayLogK3S(c *check.C) {
+func (s *BaseSuite) displayLogK3S() {
 	filePath := "./fixtures/k8s/config.skip/k3s.log"
 	if _, err := os.Stat(filePath); err == nil {
 		content, errR := os.ReadFile(filePath)

internal/gendoc.go

@@ -135,7 +135,7 @@ type storeWriter struct {
 	data map[string]string
 }
 
-func (f storeWriter) Put(key string, value []byte, options []string) error {
+func (f storeWriter) Put(key string, value []byte, _ []string) error {
 	f.data[key] = string(value)
 	return nil
 }

pkg/api/debug.go

@@ -11,7 +11,7 @@ import (
 )
 
 func init() {
-	// FIXME Goroutines2 -> Goroutines
+	// TODO Goroutines2 -> Goroutines
 	expvar.Publish("Goroutines2", expvar.Func(goroutines))
 }
 

pkg/config/dynamic/http_config.go

@@ -216,9 +216,9 @@ type ServerHealthCheck struct {
 	Path   string `json:"path,omitempty" toml:"path,omitempty" yaml:"path,omitempty" export:"true"`
 	Method string `json:"method,omitempty" toml:"method,omitempty" yaml:"method,omitempty" export:"true"`
 	Port   int    `json:"port,omitempty" toml:"port,omitempty,omitzero" yaml:"port,omitempty" export:"true"`
-	// FIXME change string to ptypes.Duration
+	// TODO change string to ptypes.Duration
 	Interval string `json:"interval,omitempty" toml:"interval,omitempty" yaml:"interval,omitempty" export:"true"`
-	// FIXME change string to ptypes.Duration
+	// TODO change string to ptypes.Duration
 	Timeout         string            `json:"timeout,omitempty" toml:"timeout,omitempty" yaml:"timeout,omitempty" export:"true"`
 	Hostname        string            `json:"hostname,omitempty" toml:"hostname,omitempty" yaml:"hostname,omitempty"`
 	FollowRedirects *bool             `json:"followRedirects" toml:"followRedirects" yaml:"followRedirects" export:"true"`

pkg/metrics/metrics.go

@@ -20,27 +20,32 @@ type Registry interface {
 	IsSvcEnabled() bool
 
 	// server metrics
+
 	ConfigReloadsCounter() metrics.Counter
 	ConfigReloadsFailureCounter() metrics.Counter
 	LastConfigReloadSuccessGauge() metrics.Gauge
 	LastConfigReloadFailureGauge() metrics.Gauge
 
 	// TLS
+
 	TLSCertsNotAfterTimestampGauge() metrics.Gauge
 
 	// entry point metrics
+
 	EntryPointReqsCounter() metrics.Counter
 	EntryPointReqsTLSCounter() metrics.Counter
 	EntryPointReqDurationHistogram() ScalableHistogram
 	EntryPointOpenConnsGauge() metrics.Gauge
 
 	// router metrics
+
 	RouterReqsCounter() metrics.Counter
 	RouterReqsTLSCounter() metrics.Counter
 	RouterReqDurationHistogram() ScalableHistogram
 	RouterOpenConnsGauge() metrics.Gauge
 
 	// service metrics
+
 	ServiceReqsCounter() metrics.Counter
 	ServiceReqsTLSCounter() metrics.Counter
 	ServiceReqDurationHistogram() ScalableHistogram

pkg/middlewares/metrics/metrics.go

@@ -166,6 +166,8 @@ func containsHeader(req *http.Request, name, value string) bool {
 // values that are not part of the set of HTTP verbs are replaced with EXTENSION_METHOD.
 // See https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods
 // https://datatracker.ietf.org/doc/html/rfc2616/#section-5.1.1.
+//
+//nolint:usestdlibvars
 func getMethod(r *http.Request) string {
 	if !utf8.ValidString(r.Method) {
 		log.WithoutContext().Warnf("Invalid HTTP method encoding: %s", r.Method)

pkg/middlewares/ratelimiter/rate_limiter.go

@@ -166,7 +166,7 @@ func (rl *rateLimiter) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	delay := res.Delay()
 	if delay > rl.maxDelay {
 		res.Cancel()
-		rl.serveDelayError(ctx, w, r, delay)
+		rl.serveDelayError(ctx, w, delay)
 		return
 	}
 
@@ -174,7 +174,7 @@ func (rl *rateLimiter) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	rl.next.ServeHTTP(w, r)
 }
 
-func (rl *rateLimiter) serveDelayError(ctx context.Context, w http.ResponseWriter, r *http.Request, delay time.Duration) {
+func (rl *rateLimiter) serveDelayError(ctx context.Context, w http.ResponseWriter, delay time.Duration) {
 	w.Header().Set("Retry-After", fmt.Sprintf("%.0f", math.Ceil(delay.Seconds())))
 	w.Header().Set("X-Retry-In", delay.String())
 	w.WriteHeader(http.StatusTooManyRequests)

pkg/middlewares/retry/retry.go

@@ -16,7 +16,6 @@ import (
 	"github.com/traefik/traefik/v2/pkg/config/dynamic"
 	"github.com/traefik/traefik/v2/pkg/log"
 	"github.com/traefik/traefik/v2/pkg/middlewares"
-	"github.com/traefik/traefik/v2/pkg/safe"
 	"github.com/traefik/traefik/v2/pkg/tracing"
 )
 
@@ -118,7 +117,7 @@ func (r *retry) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 		r.listener.Retried(req, attempts)
 	}
 
-	err := backoff.RetryNotify(safe.OperationWithRecover(operation), backOff, notify)
+	err := backoff.RetryNotify(operation, backOff, notify)
 	if err != nil {
 		log.FromContext(middlewares.GetLoggerCtx(req.Context(), r.name, typeName)).
 			Debugf("Final retry attempt failed: %v", err.Error())

pkg/provider/acme/provider_test.go

@@ -26,7 +26,7 @@ func TestGetUncheckedCertificates(t *testing.T) {
 	domainSafe := &safe.Safe{}
 	domainSafe.Set(domainMap)
 
-	// FIXME Add a test for DefaultCertificate
+	// TODO Add a test for DefaultCertificate
 	testCases := []struct {
 		desc             string
 		dynamicCerts     *safe.Safe

pkg/provider/consulcatalog/config.go

@@ -140,9 +140,9 @@ func (p *Provider) buildTCPServiceConfiguration(item itemData, configuration *dy
 		}
 	}
 
-	for _, service := range configuration.Services {
+	for name, service := range configuration.Services {
 		if err := p.addServerTCP(item, service.LoadBalancer); err != nil {
-			return err
+			return fmt.Errorf("%s: %w", name, err)
 		}
 	}
 
@@ -160,9 +160,9 @@ func (p *Provider) buildUDPServiceConfiguration(item itemData, configuration *dy
 		}
 	}
 
-	for _, service := range configuration.Services {
+	for name, service := range configuration.Services {
 		if err := p.addServerUDP(item, service.LoadBalancer); err != nil {
-			return err
+			return fmt.Errorf("%s: %w", name, err)
 		}
 	}
 
@@ -181,9 +181,9 @@ func (p *Provider) buildServiceConfiguration(item itemData, configuration *dynam
 		}
 	}
 
-	for _, service := range configuration.Services {
+	for name, service := range configuration.Services {
 		if err := p.addServer(item, service.LoadBalancer); err != nil {
-			return err
+			return fmt.Errorf("%s: %w", name, err)
 		}
 	}
 

pkg/provider/docker/docker.go

@@ -206,6 +206,7 @@ func (p *Provider) Provide(configurationChan chan<- dynamic.Message, pool *safe.
 				logger.Errorf("Failed to create a client for docker, error: %s", err)
 				return err
 			}
+			defer dockerClient.Close()
 
 			serverVersion, err := dockerClient.ServerVersion(ctx)
 			if err != nil {
@@ -250,7 +251,7 @@ func (p *Provider) Provide(configurationChan chan<- dynamic.Message, pool *safe.
 							case <-ticker.C:
 								services, err := p.listServices(ctx, dockerClient)
 								if err != nil {
-									logger.Errorf("Failed to list services for docker, error %s", err)
+									logger.Errorf("Failed to list services for docker swarm mode, error %s", err)
 									errChan <- err
 									return
 								}

pkg/provider/kubernetes/crd/fixtures/with_servers_transport.yml

@@ -46,7 +46,7 @@ metadata:
 
 data:
   ca.crt: VEVTVFJPT1RDQVM0
-  tls.ca: VEVTVFJPT1RDQVM1 # <-- This should be the prefered one.
+  tls.ca: VEVTVFJPT1RDQVM1 # <-- This should be the preferred one.
 
 ---
 apiVersion: v1

pkg/provider/kv/kv_mock_test.go

@@ -97,7 +97,7 @@ func (s *Mock) List(ctx context.Context, prefix string, options *store.ReadOptio
 	}
 	var kv []*store.KVPair
 	for _, kvPair := range s.KVPairs {
-		if strings.HasPrefix(kvPair.Key, prefix) { // FIXME && !strings.ContainsAny(strings.TrimPrefix(kvPair.Key, prefix), "/") {
+		if strings.HasPrefix(kvPair.Key, prefix) {
 			kv = append(kv, kvPair)
 		}
 	}

pkg/server/middleware/middlewares.go

@@ -314,7 +314,7 @@ func (b *Builder) buildConstructor(ctx context.Context, middlewareName string) (
 			return nil, badConf
 		}
 		middleware = func(next http.Handler) (http.Handler, error) {
-			// FIXME missing metrics / accessLog
+			// TODO missing metrics / accessLog
 			return retry.New(ctx, next, *config.Retry, retry.Listeners{}, middlewareName)
 		}
 	}

pkg/server/router/tcp/router.go

@@ -106,7 +106,7 @@ func (r *Router) ServeTCP(conn tcp.WriteCloser) {
 		// we still need to reply with a 404.
 	}
 
-	// FIXME -- Check if ProxyProtocol changes the first bytes of the request
+	// TODO -- Check if ProxyProtocol changes the first bytes of the request
 	br := bufio.NewReader(conn)
 	hello, err := clientHelloInfo(br)
 	if err != nil {
@@ -218,7 +218,7 @@ func (r *Router) AddHTTPTLSConfig(sniHost string, config *tls.Config) {
 
 // GetConn creates a connection proxy with a peeked string.
 func (r *Router) GetConn(conn tcp.WriteCloser, peeked string) tcp.WriteCloser {
-	// FIXME should it really be on Router ?
+	// TODO should it really be on Router ?
 	conn = &Conn{
 		Peeked:      []byte(peeked),
 		WriteCloser: conn,

pkg/server/router/udp/router.go

@@ -52,11 +52,7 @@ func (m *Manager) BuildHandlers(rootCtx context.Context, entryPoints []string) m
 			log.FromContext(ctx).Warn("Config has more than one udp router for a given entrypoint.")
 		}
 
-		handlers, err := m.buildEntryPointHandlers(ctx, routers)
+		handlers := m.buildEntryPointHandlers(ctx, routers)
-		if err != nil {
-			log.FromContext(ctx).Error(err)
-			continue
-		}
 
 		if len(handlers) > 0 {
 			// As UDP support only one router per entrypoint, we only take the first one.
@@ -66,7 +62,7 @@ func (m *Manager) BuildHandlers(rootCtx context.Context, entryPoints []string) m
 	return entryPointHandlers
 }
 
-func (m *Manager) buildEntryPointHandlers(ctx context.Context, configs map[string]*runtime.UDPRouterInfo) ([]udp.Handler, error) {
+func (m *Manager) buildEntryPointHandlers(ctx context.Context, configs map[string]*runtime.UDPRouterInfo) []udp.Handler {
 	var rtNames []string
 	for routerName := range configs {
 		rtNames = append(rtNames, routerName)
@@ -101,5 +97,5 @@ func (m *Manager) buildEntryPointHandlers(ctx context.Context, configs map[strin
 		handlers = append(handlers, handler)
 	}
 
-	return handlers, nil
+	return handlers
 }

pkg/server/service/service.go

@@ -426,7 +426,7 @@ func (m *Manager) upsertServers(ctx context.Context, lb healthcheck.BalancerHand
 			return fmt.Errorf("error adding server %s to load balancer: %w", srv.URL, err)
 		}
 
-		// FIXME Handle Metrics
+		// TODO Handle Metrics
 	}
 	return nil
 }

pkg/tls/certificate_store_test.go

@@ -14,7 +14,7 @@ import (
 )
 
 func TestGetBestCertificate(t *testing.T) {
-	// FIXME Add tests for defaultCert
+	// TODO Add tests for defaultCert
 	testCases := []struct {
 		desc          string
 		domainToCheck string