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Transport TIME_WAIT load test
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netstat -n | grep -i 8080 | grep -i time_wait | wc -l |
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package main | |
import ( | |
"context" | |
"fmt" | |
"html" | |
"io" | |
"io/ioutil" | |
"log" | |
"net" | |
"net/http" | |
"time" | |
"golang.org/x/net/http2" | |
) | |
func newV1Client() (*http.Client, error) { | |
tr := &http.Transport{ | |
DialContext: (&net.Dialer{ | |
Timeout: 30 * time.Second, | |
KeepAlive: 30 * time.Second, | |
}).DialContext, | |
MaxIdleConns: 100, | |
IdleConnTimeout: 90 * time.Second, | |
} | |
if err := http2.ConfigureTransport(tr); err != nil { | |
return nil, err | |
} | |
fmt.Printf("\nV1: \n") | |
showTransport(tr) | |
return &http.Client{ | |
Transport: tr, | |
Timeout: 30 * time.Second, | |
}, nil | |
} | |
func newV2Client() (*http.Client, error) { | |
tr := &http.Transport{ | |
DialContext: (&net.Dialer{ | |
Timeout: 30 * time.Second, | |
KeepAlive: 30 * time.Second, | |
DualStack: true, | |
}).DialContext, | |
MaxIdleConns: 100, | |
IdleConnTimeout: 90 * time.Second, | |
TLSHandshakeTimeout: 10 * time.Second, | |
ExpectContinueTimeout: 1 * time.Second, | |
ForceAttemptHTTP2: true, | |
MaxIdleConnsPerHost: 100, | |
} | |
if err := http2.ConfigureTransport(tr); err != nil { | |
return nil, err | |
} | |
fmt.Printf("\nV2: \n") | |
showTransport(tr) | |
return &http.Client{ | |
Transport: tr, | |
Timeout: 30 * time.Second, | |
}, nil | |
} | |
func server() { | |
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { | |
time.Sleep(time.Millisecond * 50) | |
fmt.Fprintf(w, "hello, %q", html.EscapeString(r.URL.Path)) | |
}) | |
go http.ListenAndServe(":8080", nil) | |
} | |
func loadtest(ctx context.Context, client *http.Client) { | |
count := 0 | |
req, err := http.NewRequestWithContext(ctx, http.MethodGet, "http://localhost:8080/", nil) | |
if err != nil { | |
msg := fmt.Sprintf("Go error: %v\n", err) | |
panic(msg) | |
} | |
for { | |
resp, err := client.Do(req) | |
if err != nil { | |
msg := fmt.Sprintf("Got error: %v", err) | |
panic(msg) | |
} | |
io.Copy(ioutil.Discard, resp.Body) | |
resp.Body.Close() | |
log.Printf("Finished GET request #%v", count) | |
count = count + 1 | |
} | |
} | |
func main() { | |
ctx, cancel := context.WithCancel(context.Background()) | |
defer cancel() | |
client, err := newV2Client() | |
if err != nil { | |
log.Fatal(err) | |
} | |
server() | |
n := 100 | |
for i := 0; i < n; i++ { | |
go loadtest(ctx, client) | |
} | |
time.Sleep(time.Second * 2400) | |
} | |
func showTransport(tr *http.Transport) { | |
fmt.Printf(" MaxIdleConns: %v\n", tr.MaxIdleConns) | |
fmt.Printf(" IdleConnTimeout: %v\n", tr.IdleConnTimeout) | |
fmt.Printf(" TLSHandshakeTimeout: %v\n", tr.TLSHandshakeTimeout) | |
fmt.Printf(" ExpectContinueTimeout: %v\n", tr.ExpectContinueTimeout) | |
fmt.Printf(" MaxIdleConnsPerHost: %v\n", tr.MaxIdleConnsPerHost) | |
fmt.Printf(" ForceAttemptHTTP2: %v\n", tr.ForceAttemptHTTP2) | |
} |
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