Documentation
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Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type Client ¶
type Client interface {
Shutdown()
}
Client is the interface for our tracer. It contains the underlying tracer provider and a Shutdown method to perform a clean shutdown.
func New ¶
New is used to create a new tracer. For that we are creating a new TracerProvider and register it as the global so any imported instrumentation will default to using it. If tracing is disabled the setup function returns a client without a TracerProvider.
During the shutdown process of echoserver the "Shutdown" method of the returned client must be called.
To test the tracer we can start a local Jaeger instance with the following commands (the UI will be available at localhost:16686):
docker run --rm --name jaeger -d -p 16686:16686 -p 4317:4317 jaegertracing/all-in-one:1.54 docker stop jaeger
type Config ¶
type Config struct {
Enabled bool `env:"ENABLED" enum:"true,false" default:"false" help:"Enable tracing."`
Service string `env:"SERVICE" default:"echoserver" help:"The name of the service which should be used for tracing."`
Address string `env:"ADDRESS" default:"localhost:4317" help:"The address of the tracing provider instance."`
}
Config is the configuration for our tracer. Via the configuration we can enable / disable the tracing. If the tracing is enabled we need the service name and address.
Source Files