traefik/integration/udp_test.go

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package integration
import (
"net"
"net/http"
"strings"
"testing"
"time"
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"github.com/rs/zerolog/log"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/stretchr/testify/suite"
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"github.com/traefik/traefik/v3/integration/try"
)
type UDPSuite struct{ BaseSuite }
func TestUDPSuite(t *testing.T) {
suite.Run(t, new(UDPSuite))
}
func (s *UDPSuite) SetupSuite() {
s.BaseSuite.SetupSuite()
s.createComposeProject("udp")
s.composeUp()
}
func (s *UDPSuite) TearDownSuite() {
s.BaseSuite.TearDownSuite()
}
func guessWhoUDP(addr string) (string, error) {
var conn net.Conn
var err error
udpAddr, err2 := net.ResolveUDPAddr("udp", addr)
if err2 != nil {
return "", err2
}
conn, err = net.DialUDP("udp", nil, udpAddr)
if err != nil {
return "", err
}
_, err = conn.Write([]byte("WHO"))
if err != nil {
return "", err
}
out := make([]byte, 2048)
n, err := conn.Read(out)
if err != nil {
return "", err
}
return string(out[:n]), nil
}
func (s *UDPSuite) TestWRR() {
file := s.adaptFile("fixtures/udp/wrr.toml", struct {
WhoamiAIP string
WhoamiBIP string
WhoamiCIP string
WhoamiDIP string
}{
WhoamiAIP: s.getComposeServiceIP("whoami-a"),
WhoamiBIP: s.getComposeServiceIP("whoami-b"),
WhoamiCIP: s.getComposeServiceIP("whoami-c"),
WhoamiDIP: s.getComposeServiceIP("whoami-d"),
})
s.traefikCmd(withConfigFile(file))
err := try.GetRequest("http://127.0.0.1:8080/api/rawdata", 5*time.Second, try.StatusCodeIs(http.StatusOK), try.BodyContains("whoami-a"))
require.NoError(s.T(), err)
err = try.GetRequest("http://127.0.0.1:8093/who", 5*time.Second, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
stop := make(chan struct{})
go func() {
call := map[string]int{}
for i := 0; i < 8; i++ {
out, err := guessWhoUDP("127.0.0.1:8093")
require.NoError(s.T(), err)
switch {
case strings.Contains(out, "whoami-a"):
call["whoami-a"]++
case strings.Contains(out, "whoami-b"):
call["whoami-b"]++
case strings.Contains(out, "whoami-c"):
call["whoami-c"]++
default:
call["unknown"]++
}
}
assert.EqualValues(s.T(), call, map[string]int{"whoami-a": 3, "whoami-b": 2, "whoami-c": 3})
close(stop)
}()
select {
case <-stop:
case <-time.Tick(5 * time.Second):
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log.Info().Msg("Timeout")
}
}