traefik/integration/conf_throttling_test.go

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package integration
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net/http"
"regexp"
"strconv"
"time"
"github.com/go-check/check"
2023-02-03 14:24:05 +00:00
"github.com/traefik/traefik/v3/integration/try"
"github.com/traefik/traefik/v3/pkg/config/dynamic"
checker "github.com/vdemeester/shakers"
)
type ThrottlingSuite struct{ BaseSuite }
func (s *ThrottlingSuite) SetUpSuite(c *check.C) {
s.createComposeProject(c, "rest")
s.composeUp(c)
}
func (s *ThrottlingSuite) TestThrottleConfReload(c *check.C) {
cmd, display := s.traefikCmd(withConfigFile("fixtures/throttling/simple.toml"))
defer display(c)
err := cmd.Start()
c.Assert(err, checker.IsNil)
defer s.killCmd(cmd)
// wait for Traefik
err = try.GetRequest("http://127.0.0.1:8080/api/rawdata", 1000*time.Millisecond, try.BodyContains("rest@internal"))
c.Assert(err, checker.IsNil)
// Expected a 404 as we did not configure anything.
err = try.GetRequest("http://127.0.0.1:8000/", 1000*time.Millisecond, try.StatusCodeIs(http.StatusNotFound))
c.Assert(err, checker.IsNil)
config := &dynamic.Configuration{
HTTP: &dynamic.HTTPConfiguration{
Routers: map[string]*dynamic.Router{},
Services: map[string]*dynamic.Service{
"serviceHTTP": {
LoadBalancer: &dynamic.ServersLoadBalancer{
Servers: []dynamic.Server{
{
URL: "http://" + s.getComposeServiceIP(c, "whoami1") + ":80",
},
},
},
},
},
},
}
router := &dynamic.Router{
EntryPoints: []string{"web"},
Middlewares: []string{},
Service: "serviceHTTP",
Rule: "PathPrefix(`/`)",
}
confChanges := 10
for i := 0; i < confChanges; i++ {
config.HTTP.Routers[fmt.Sprintf("routerHTTP%d", i)] = router
data, err := json.Marshal(config)
c.Assert(err, checker.IsNil)
request, err := http.NewRequest(http.MethodPut, "http://127.0.0.1:8080/api/providers/rest", bytes.NewReader(data))
c.Assert(err, checker.IsNil)
response, err := http.DefaultClient.Do(request)
c.Assert(err, checker.IsNil)
c.Assert(response.StatusCode, checker.Equals, http.StatusOK)
time.Sleep(200 * time.Millisecond)
}
reloadsRegexp := regexp.MustCompile(`traefik_config_reloads_total (\d*)\n`)
resp, err := http.Get("http://127.0.0.1:8080/metrics")
c.Assert(err, checker.IsNil)
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
c.Assert(err, checker.IsNil)
fields := reloadsRegexp.FindStringSubmatch(string(body))
c.Assert(len(fields), checker.Equals, 2)
reloads, err := strconv.Atoi(fields[1])
if err != nil {
panic(err)
}
// The test tries to trigger a config reload with the REST API every 200ms,
// 10 times (so for 2s in total).
// Therefore the throttling (set at 400ms for this test) should only let
// (2s / 400 ms =) 5 config reloads happen in theory.
// In addition, we have to take into account the extra config reload from the internal provider (5 + 1).
c.Assert(reloads, checker.LessOrEqualThan, 6)
}