traefik/integration/retry_test.go

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package integration
import (
"net/http"
"os"
"time"
"github.com/go-check/check"
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"github.com/gorilla/websocket"
"github.com/traefik/traefik/v2/integration/try"
checker "github.com/vdemeester/shakers"
)
type RetrySuite struct {
BaseSuite
whoamiIP string
}
func (s *RetrySuite) SetUpSuite(c *check.C) {
s.createComposeProject(c, "retry")
s.composeUp(c)
s.whoamiIP = s.getComposeServiceIP(c, "whoami")
}
func (s *RetrySuite) TestRetry(c *check.C) {
file := s.adaptFile(c, "fixtures/retry/simple.toml", struct{ WhoamiIP string }{s.whoamiIP})
defer os.Remove(file)
cmd, display := s.traefikCmd(withConfigFile(file))
defer display(c)
err := cmd.Start()
c.Assert(err, checker.IsNil)
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defer s.killCmd(cmd)
err = try.GetRequest("http://127.0.0.1:8080/api/rawdata", 60*time.Second, try.BodyContains("PathPrefix(`/`)"))
c.Assert(err, checker.IsNil)
start := time.Now()
// This simulates a DialTimeout when connecting to the backend server.
response, err := http.Get("http://127.0.0.1:8000/")
duration, allowed := time.Since(start), time.Millisecond*250
c.Assert(err, checker.IsNil)
c.Assert(response.StatusCode, checker.Equals, http.StatusOK)
c.Assert(int64(duration), checker.LessThan, int64(allowed))
}
func (s *RetrySuite) TestRetryBackoff(c *check.C) {
file := s.adaptFile(c, "fixtures/retry/backoff.toml", struct{ WhoamiIP string }{s.whoamiIP})
defer os.Remove(file)
cmd, display := s.traefikCmd(withConfigFile(file))
defer display(c)
err := cmd.Start()
c.Assert(err, checker.IsNil)
defer s.killCmd(cmd)
err = try.GetRequest("http://127.0.0.1:8080/api/rawdata", 60*time.Second, try.BodyContains("PathPrefix(`/`)"))
c.Assert(err, checker.IsNil)
start := time.Now()
// This simulates a DialTimeout when connecting to the backend server.
response, err := http.Get("http://127.0.0.1:8000/")
duration := time.Since(start)
// test case delays: 500 + 700 + 1000ms with randomization. It should be safely > 1500ms
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minAllowed := time.Millisecond * 1400
c.Assert(err, checker.IsNil)
c.Assert(response.StatusCode, checker.Equals, http.StatusOK)
c.Assert(int64(duration), checker.GreaterThan, int64(minAllowed))
}
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func (s *RetrySuite) TestRetryWebsocket(c *check.C) {
file := s.adaptFile(c, "fixtures/retry/simple.toml", struct{ WhoamiIP string }{s.whoamiIP})
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defer os.Remove(file)
cmd, display := s.traefikCmd(withConfigFile(file))
defer display(c)
err := cmd.Start()
c.Assert(err, checker.IsNil)
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defer s.killCmd(cmd)
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err = try.GetRequest("http://127.0.0.1:8080/api/rawdata", 60*time.Second, try.BodyContains("PathPrefix(`/`)"))
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c.Assert(err, checker.IsNil)
// This simulates a DialTimeout when connecting to the backend server.
_, response, err := websocket.DefaultDialer.Dial("ws://127.0.0.1:8000/echo", nil)
c.Assert(err, checker.IsNil)
c.Assert(response.StatusCode, checker.Equals, http.StatusSwitchingProtocols)
_, response, err = websocket.DefaultDialer.Dial("ws://127.0.0.1:8000/echo", nil)
c.Assert(err, checker.IsNil)
c.Assert(response.StatusCode, checker.Equals, http.StatusSwitchingProtocols)
}