Move code to pkg

pkg/tracing/instana/instana.go

@@ -0,0 +1,49 @@
+package instana
+
+import (
+	"io"
+
+	"github.com/containous/traefik/pkg/log"
+	instana "github.com/instana/go-sensor"
+	"github.com/opentracing/opentracing-go"
+)
+
+// Name sets the name of this tracer
+const Name = "instana"
+
+// Config provides configuration settings for a instana tracer
+type Config struct {
+	LocalAgentHost string `description:"Set instana-agent's host that the reporter will used." export:"false"`
+	LocalAgentPort int    `description:"Set instana-agent's port that the reporter will used." export:"false"`
+	LogLevel       string `description:"Set instana-agent's log level. ('error','warn','info','debug')" export:"false"`
+}
+
+// Setup sets up the tracer
+func (c *Config) Setup(serviceName string) (opentracing.Tracer, io.Closer, error) {
+	// set default logLevel
+	logLevel := instana.Info
+
+	// check/set logLevel overrides
+	switch c.LogLevel {
+	case "error":
+		logLevel = instana.Error
+	case "warn":
+		logLevel = instana.Warn
+	case "debug":
+		logLevel = instana.Debug
+	}
+
+	tracer := instana.NewTracerWithOptions(&instana.Options{
+		Service:   serviceName,
+		LogLevel:  logLevel,
+		AgentPort: c.LocalAgentPort,
+		AgentHost: c.LocalAgentHost,
+	})
+
+	// Without this, child spans are getting the NOOP tracer
+	opentracing.SetGlobalTracer(tracer)
+
+	log.WithoutContext().Debug("Instana tracer configured")
+
+	return tracer, nil, nil
+}