Update linter

pkg/tracing/datadog/datadog.go

@@ -10,10 +10,10 @@ import (
 	datadog "gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer"
 )
 
-// Name sets the name of this tracer
+// Name sets the name of this tracer.
 const Name = "datadog"
 
-// Config provides configuration settings for a datadog tracer
+// Config provides configuration settings for a datadog tracer.
 type Config struct {
 	LocalAgentHostPort         string `description:"Set datadog-agent's host:port that the reporter will used." json:"localAgentHostPort,omitempty" toml:"localAgentHostPort,omitempty" yaml:"localAgentHostPort,omitempty"`
 	GlobalTag                  string `description:"Key:Value tag to be set on all the spans." json:"globalTag,omitempty" toml:"globalTag,omitempty" yaml:"globalTag,omitempty" export:"true"`
@@ -33,7 +33,7 @@ func (c *Config) SetDefaults() {
 	c.PrioritySampling = false
 }
 
-// Setup sets up the tracer
+// Setup sets up the tracer.
 func (c *Config) Setup(serviceName string) (opentracing.Tracer, io.Closer, error) {
 	tag := strings.SplitN(c.GlobalTag, ":", 2)
 

pkg/tracing/haystack/haystack.go

@@ -10,10 +10,10 @@ import (
 	"github.com/opentracing/opentracing-go"
 )
 
-// Name sets the name of this tracer
+// Name sets the name of this tracer.
 const Name = "haystack"
 
-// Config provides configuration settings for a haystack tracer
+// Config provides configuration settings for a haystack tracer.
 type Config struct {
 	LocalAgentHost          string `description:"Set haystack-agent's host that the reporter will used." json:"localAgentHost,omitempty" toml:"localAgentHost,omitempty" yaml:"localAgentHost,omitempty"`
 	LocalAgentPort          int    `description:"Set haystack-agent's port that the reporter will used." json:"localAgentPort,omitempty" toml:"localAgentPort,omitempty" yaml:"localAgentPort,omitempty"`
@@ -30,7 +30,7 @@ func (c *Config) SetDefaults() {
 	c.LocalAgentPort = 35000
 }
 
-// Setup sets up the tracer
+// Setup sets up the tracer.
 func (c *Config) Setup(serviceName string) (opentracing.Tracer, io.Closer, error) {
 	tag := strings.SplitN(c.GlobalTag, ":", 2)
 

pkg/tracing/haystack/logger.go

@@ -4,22 +4,21 @@ import (
 	"github.com/containous/traefik/v2/pkg/log"
 )
 
-/*NullLogger does nothing*/
 type haystackLogger struct {
 	logger log.Logger
 }
 
-/*Error prints the error message*/
+// Error prints the error message.
 func (l haystackLogger) Error(format string, v ...interface{}) {
 	l.logger.Errorf(format, v)
 }
 
-/*Info prints the info message*/
+// Info prints the info message.
 func (l haystackLogger) Info(format string, v ...interface{}) {
 	l.logger.Infof(format, v)
 }
 
-/*Debug prints the info message*/
+// Debug prints the info message.
 func (l haystackLogger) Debug(format string, v ...interface{}) {
 	l.logger.Debug(format, v)
 }

pkg/tracing/instana/instana.go

@@ -8,10 +8,10 @@ import (
 	"github.com/opentracing/opentracing-go"
 )
 
-// Name sets the name of this tracer
+// Name sets the name of this tracer.
 const Name = "instana"
 
-// Config provides configuration settings for a instana tracer
+// Config provides configuration settings for a instana tracer.
 type Config struct {
 	LocalAgentHost string `description:"Set instana-agent's host that the reporter will used." json:"localAgentHost,omitempty" toml:"localAgentHost,omitempty" yaml:"localAgentHost,omitempty"`
 	LocalAgentPort int    `description:"Set instana-agent's port that the reporter will used." json:"localAgentPort,omitempty" toml:"localAgentPort,omitempty" yaml:"localAgentPort,omitempty"`
@@ -24,7 +24,7 @@ func (c *Config) SetDefaults() {
 	c.LogLevel = "info"
 }
 
-// Setup sets up the tracer
+// Setup sets up the tracer.
 func (c *Config) Setup(serviceName string) (opentracing.Tracer, io.Closer, error) {
 	// set default logLevel
 	logLevel := instana.Info

pkg/tracing/jaeger/jaeger.go

@@ -52,7 +52,7 @@ func (c *Collector) SetDefaults() {
 	c.Password = ""
 }
 
-// Setup sets up the tracer
+// Setup sets up the tracer.
 func (c *Config) Setup(componentName string) (opentracing.Tracer, io.Closer, error) {
 	reporter := &jaegercfg.ReporterConfig{
 		LogSpans:           true,

pkg/tracing/jaeger/logger.go

@@ -5,7 +5,7 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-// jaegerLogger is an implementation of the Logger interface that delegates to traefik log
+// jaegerLogger is an implementation of the Logger interface that delegates to traefik log.
 type jaegerLogger struct {
 	logger logrus.FieldLogger
 }
@@ -20,7 +20,7 @@ func (l *jaegerLogger) Error(msg string) {
 	l.logger.Errorf("Tracing jaeger error: %s", msg)
 }
 
-// Infof logs a message at debug priority
+// Infof logs a message at debug priority.
 func (l *jaegerLogger) Infof(msg string, args ...interface{}) {
 	l.logger.Debugf(msg, args...)
 }

pkg/tracing/tracing.go

@@ -94,7 +94,7 @@ func (t *Tracing) IsEnabled() bool {
 	return t != nil && t.tracer != nil
 }
 
-// Close tracer
+// Close tracer.
 func (t *Tracing) Close() {
 	if t.closer != nil {
 		err := t.closer.Close()
@@ -148,7 +148,7 @@ func LogEventf(r *http.Request, format string, args ...interface{}) {
 	}
 }
 
-// StartSpan starts a new span from the one in the request context
+// StartSpan starts a new span from the one in the request context.
 func StartSpan(r *http.Request, operationName string, spanKind ext.SpanKindEnum, opts ...opentracing.StartSpanOption) (opentracing.Span, *http.Request, func()) {
 	span, ctx := opentracing.StartSpanFromContext(r.Context(), operationName, opts...)
 

pkg/tracing/zipkin/zipkin.go

@@ -30,7 +30,7 @@ func (c *Config) SetDefaults() {
 	c.SampleRate = 1.0
 }
 
-// Setup sets up the tracer
+// Setup sets up the tracer.
 func (c *Config) Setup(serviceName string) (opentracing.Tracer, io.Closer, error) {
 	// create our local endpoint
 	endpoint, err := zipkin.NewEndpoint(serviceName, "0.0.0.0:0")