package elastic import ( "io" "net/url" "github.com/opentracing/opentracing-go" "github.com/traefik/traefik/v2/pkg/log" "github.com/traefik/traefik/v2/pkg/version" "go.elastic.co/apm" "go.elastic.co/apm/module/apmot" "go.elastic.co/apm/transport" ) // Name sets the name of this tracer. const Name = "elastic" func init() { // The APM lib uses the init() function to create a default tracer. // So this default tracer must be disabled. // https://github.com/elastic/apm-agent-go/blob/8dd383d0d21776faad8841fe110f35633d199a03/tracer.go#L61-L65 apm.DefaultTracer.Close() } // Config provides configuration settings for a elastic.co tracer. type Config struct { ServerURL string `description:"Sets the URL of the Elastic APM server." json:"serverURL,omitempty" toml:"serverURL,omitempty" yaml:"serverURL,omitempty"` SecretToken string `description:"Sets the token used to connect to Elastic APM Server." json:"secretToken,omitempty" toml:"secretToken,omitempty" yaml:"secretToken,omitempty"` ServiceEnvironment string `description:"Sets the name of the environment Traefik is deployed in, e.g. 'production' or 'staging'." json:"serviceEnvironment,omitempty" toml:"serviceEnvironment,omitempty" yaml:"serviceEnvironment,omitempty" export:"true"` } // Setup sets up the tracer. func (c *Config) Setup(serviceName string) (opentracing.Tracer, io.Closer, error) { // Create default transport. tr, err := transport.NewHTTPTransport() if err != nil { return nil, nil, err } if c.ServerURL != "" { serverURL, err := url.Parse(c.ServerURL) if err != nil { return nil, nil, err } tr.SetServerURL(serverURL) } if c.SecretToken != "" { tr.SetSecretToken(c.SecretToken) } tracer, err := apm.NewTracerOptions(apm.TracerOptions{ ServiceName: serviceName, ServiceVersion: version.Version, ServiceEnvironment: c.ServiceEnvironment, Transport: tr, }) if err != nil { return nil, nil, err } tracer.SetLogger(log.WithoutContext()) otTracer := apmot.New(apmot.WithTracer(tracer)) // Without this, child spans are getting the NOOP tracer opentracing.SetGlobalTracer(otTracer) log.WithoutContext().Debug("Elastic tracer configured") return otTracer, nil, nil }