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feature: flightrecorder to enable Go trace
feature: allow configuration for Go x/trace.FlightRecorder pass default period to define what means skipper to be slow Signed-off-by: Sandor Szücs <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| package proxy_test | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "net/http/httptest" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/zalando/skipper/eskip" | ||
| "github.com/zalando/skipper/filters" | ||
| "github.com/zalando/skipper/filters/diag" | ||
| "github.com/zalando/skipper/proxy" | ||
| "github.com/zalando/skipper/proxy/proxytest" | ||
| xtrace "golang.org/x/exp/trace" | ||
| ) | ||
|
|
||
| func TestFlightRecorder(t *testing.T) { | ||
| ch := make(chan int) | ||
| service := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
| if r.Method != "PUT" { | ||
| w.WriteHeader(http.StatusMethodNotAllowed) | ||
| w.Write([]byte(http.StatusText(http.StatusMethodNotAllowed))) | ||
| ch <- http.StatusMethodNotAllowed | ||
| return | ||
| } | ||
|
|
||
| var buf bytes.Buffer | ||
| n, err := io.Copy(&buf, r.Body) | ||
| if err != nil { | ||
| t.Fatalf("Failed to copy data: %v", err) | ||
| } | ||
| if n < 100 { | ||
| t.Fatalf("Failed to write enough data: %d bytes", n) | ||
| } | ||
| w.WriteHeader(http.StatusCreated) | ||
| w.Write([]byte(http.StatusText(http.StatusCreated))) | ||
| ch <- http.StatusCreated | ||
| })) | ||
| defer service.Close() | ||
|
|
||
| backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
| w.WriteHeader(http.StatusOK) | ||
| w.Write([]byte(http.StatusText(http.StatusOK))) | ||
| })) | ||
| defer backend.Close() | ||
|
|
||
| flightRecorder := xtrace.NewFlightRecorder() | ||
| flightRecorder.Start() | ||
|
|
||
| spec := diag.NewLatency() | ||
| fr := make(filters.Registry) | ||
| fr.Register(spec) | ||
|
|
||
| doc := fmt.Sprintf(`r: * -> latency("100ms") -> "%s"`, backend.URL) | ||
| rr := eskip.MustParse(doc) | ||
|
|
||
| pr := proxytest.WithParams(fr, proxy.Params{ | ||
| FlightRecorder: flightRecorder, | ||
| FlightRecorderTargetURL: service.URL, | ||
| FlightRecorderPeriod: 90 * time.Millisecond, | ||
| }, rr...) | ||
| defer pr.Close() | ||
|
|
||
| rsp, err := pr.Client().Get(pr.URL) | ||
| if err != nil { | ||
| t.Fatalf("Failed to GET %q: %v", pr.URL, err) | ||
| } | ||
| defer rsp.Body.Close() | ||
| _, err = io.ReadAll(rsp.Body) | ||
| if err != nil { | ||
| t.Fatalf("Failed to read body: %v", err) | ||
| } | ||
|
|
||
| switch rsp.StatusCode { | ||
| case http.StatusOK: | ||
| // ok | ||
| default: | ||
| t.Fatalf("Failed to get status OK: %d", rsp.StatusCode) | ||
| } | ||
|
|
||
| statusCode := <-ch | ||
| switch statusCode { | ||
| case http.StatusCreated: | ||
| // ok | ||
| default: | ||
| t.Fatalf("Failed to get status OK: %d", rsp.StatusCode) | ||
| } | ||
| } |
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