106 lines
2.9 KiB
Go
106 lines
2.9 KiB
Go
package integration
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import (
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"math"
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"net"
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"net/http"
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"net/http/httptest"
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"os"
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"time"
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"github.com/go-check/check"
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"github.com/traefik/traefik/v2/integration/try"
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checker "github.com/vdemeester/shakers"
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)
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type KeepAliveSuite struct {
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BaseSuite
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}
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type KeepAliveConfig struct {
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KeepAliveServer string
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IdleConnTimeout string
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}
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type connStateChangeEvent struct {
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key string
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state http.ConnState
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}
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func (s *KeepAliveSuite) TestShouldRespectConfiguredBackendHttpKeepAliveTime(c *check.C) {
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idleTimeout := time.Duration(75) * time.Millisecond
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connStateChanges := make(chan connStateChangeEvent)
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noMoreRequests := make(chan bool, 1)
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completed := make(chan bool, 1)
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// keep track of HTTP connections and their status changes and measure their idle period
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go func() {
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connCount := 0
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idlePeriodStartMap := make(map[string]time.Time)
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idlePeriodLengthMap := make(map[string]time.Duration)
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maxWaitDuration := 5 * time.Second
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maxWaitTimeExceeded := time.After(maxWaitDuration)
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moreRequestsExpected := true
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// Ensure that all idle HTTP connections are closed before verification phase
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for moreRequestsExpected || len(idlePeriodLengthMap) < connCount {
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select {
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case event := <-connStateChanges:
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switch event.state {
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case http.StateNew:
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connCount++
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case http.StateIdle:
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idlePeriodStartMap[event.key] = time.Now()
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case http.StateClosed:
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idlePeriodLengthMap[event.key] = time.Since(idlePeriodStartMap[event.key])
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}
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case <-noMoreRequests:
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moreRequestsExpected = false
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case <-maxWaitTimeExceeded:
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c.Logf("timeout waiting for all connections to close, waited for %v, configured idle timeout was %v", maxWaitDuration, idleTimeout)
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c.Fail()
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close(completed)
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return
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}
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}
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c.Check(connCount, checker.Equals, 1)
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for _, idlePeriod := range idlePeriodLengthMap {
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// Our method of measuring the actual idle period is not precise, so allow some sub-ms deviation
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c.Check(math.Round(idlePeriod.Seconds()), checker.LessOrEqualThan, idleTimeout.Seconds())
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}
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close(completed)
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}()
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server := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(200)
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}))
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server.Config.ConnState = func(conn net.Conn, state http.ConnState) {
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connStateChanges <- connStateChangeEvent{key: conn.RemoteAddr().String(), state: state}
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}
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server.Start()
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defer server.Close()
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config := KeepAliveConfig{KeepAliveServer: server.URL, IdleConnTimeout: idleTimeout.String()}
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file := s.adaptFile(c, "fixtures/timeout/keepalive.toml", config)
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defer os.Remove(file)
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cmd, display := s.traefikCmd(withConfigFile(file))
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defer display(c)
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err := cmd.Start()
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c.Check(err, checker.IsNil)
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defer cmd.Process.Kill()
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err = try.GetRequest("http://127.0.0.1:8000/keepalive", time.Duration(1)*time.Second, try.StatusCodeIs(200))
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c.Check(err, checker.IsNil)
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close(noMoreRequests)
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<-completed
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}
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