autotel
Automatic manual tracing :) The aim of this project is to show how golang can be used to automatically inject open telemetry tracing (https://github.com/open-telemetry/opentelemetry-go). It's also a place where compiler meet open telemetry.
How to use it
./autotel [path to your go project]
How it works
autotel will search for all root functions anotated with following call
rtlib.SumoAutoInstrument()
where rtlib is small runtime library. Then all function calls starting from this function will be intrumented automatically. Example, below
package main
import (
"fmt"
"sumologic.com/autotel/rtlib"
)
func main() {
rtlib.SumoAutoInstrument()
fmt.Println(FibonacciHelper(10))
}
Result after autotel invocation
package main
import (
"fmt"
"context"
"sumologic.com/autotel/rtlib"
otel "go.opentelemetry.io/otel"
)
func main() {
fmt.Println("root instrumentation")
ts := rtlib.NewTracingState()
defer func() {
if err := ts.Tp.Shutdown(context.Backgroud()); err != nil {
ts.Logger.Fatal(err)
}
}()
otel.SetTracerProvider(ts.Tp)
ctx := context.Background()
_, span := otel.Tracer("main").Start(ctx, "main")
defer func() { span.End() }()
rtlib.SumoAutoInstrument()
fmt.Println(FibonacciHelper(10))
}
We can imagine other methods to say what needs to be instrumented (by argument(s) passed to autotel or configuration file).
