package integration import ( "net/http" "os" "time" "github.com/go-check/check" "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) 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 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)) } func (s *RetrySuite) TestRetryWebsocket(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) 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) // 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) }