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Yauheni Sliaptsou
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Mar 16, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| package observability | ||
|
|
||
| import ( | ||
| "net" | ||
| "net/http" | ||
| "strconv" | ||
| "time" | ||
|
|
||
| "github.com/rs/zerolog/log" | ||
| ) | ||
|
|
||
| // InitProbes will initialize, register and expose, via http server, the probes. | ||
| func InitProbes(enabled bool, port int, endpoint string) error { | ||
| if !enabled { | ||
| return nil | ||
| } | ||
|
|
||
| http.HandleFunc(endpoint, livenessHandler) | ||
|
|
||
| probes := &http.Server{ | ||
| Addr: net.JoinHostPort("", strconv.Itoa(port)), | ||
| ReadTimeout: 1 * time.Second, | ||
| WriteTimeout: 1 * time.Second, | ||
| } | ||
|
|
||
| // Starts HTTP server exposing the probes path | ||
| go func() { | ||
| log.Info().Msgf("Starting to serve handler %s, port %d", endpoint, port) | ||
| if err := probes.ListenAndServe(); err != nil && err != http.ErrServerClosed { | ||
| log.Err(err).Msg("Failed to listen and serve http server") | ||
| } | ||
| }() | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func livenessHandler(w http.ResponseWriter, r *http.Request) { | ||
| w.Header().Add("Content-Type", "application/json") | ||
| w.WriteHeader(http.StatusOK) | ||
| w.Write([]byte(`{"health":"OK"}`)) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package observability | ||
|
|
||
| import ( | ||
| "net/http" | ||
| "net/http/httptest" | ||
| "testing" | ||
| ) | ||
|
|
||
| func TestLivenessHandler(t *testing.T) { | ||
| req := httptest.NewRequest("GET", "/healthz", nil) | ||
| rr := httptest.NewRecorder() | ||
| handler := http.HandlerFunc(livenessHandler) | ||
|
|
||
| handler.ServeHTTP(rr, req) | ||
|
|
||
| if contentType := rr.Header().Get("Content-Type"); contentType != "application/json" { | ||
| t.Errorf("handler returned wrong status content type: got %v want %v", | ||
| contentType, "application/json") | ||
| } | ||
|
|
||
| if status := rr.Code; status != http.StatusOK { | ||
| t.Errorf("handler returned wrong status code: got %v want %v", | ||
| status, http.StatusOK) | ||
| } | ||
|
|
||
| if body := rr.Body.String(); body != `{"health":"OK"}` { | ||
| t.Errorf("handler returned wrong body: got %v want %v", | ||
| body, http.StatusText(http.StatusOK)) | ||
| } | ||
| } |