traefik/integration/healthcheck_test.go

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package integration
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import (
"bytes"
"net/http"
"os"
"time"
"github.com/go-check/check"
"github.com/traefik/traefik/v2/integration/try"
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checker "github.com/vdemeester/shakers"
)
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// HealthCheck test suites (using libcompose).
type HealthCheckSuite struct {
BaseSuite
whoami1IP string
whoami2IP string
}
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func (s *HealthCheckSuite) SetUpSuite(c *check.C) {
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s.createComposeProject(c, "healthcheck")
s.composeProject.Start(c)
s.whoami1IP = s.composeProject.Container(c, "whoami1").NetworkSettings.IPAddress
s.whoami2IP = s.composeProject.Container(c, "whoami2").NetworkSettings.IPAddress
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}
func (s *HealthCheckSuite) TestSimpleConfiguration(c *check.C) {
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file := s.adaptFile(c, "fixtures/healthcheck/simple.toml", struct {
Server1 string
Server2 string
}{s.whoami1IP, s.whoami2IP})
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defer os.Remove(file)
cmd, display := s.traefikCmd(withConfigFile(file))
defer display(c)
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err := cmd.Start()
c.Assert(err, checker.IsNil)
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defer s.killCmd(cmd)
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// wait for traefik
err = try.GetRequest("http://127.0.0.1:8080/api/rawdata", 60*time.Second, try.BodyContains("Host(`test.localhost`)"))
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c.Assert(err, checker.IsNil)
frontendHealthReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/health", nil)
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c.Assert(err, checker.IsNil)
frontendHealthReq.Host = "test.localhost"
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err = try.Request(frontendHealthReq, 500*time.Millisecond, try.StatusCodeIs(http.StatusOK))
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c.Assert(err, checker.IsNil)
// Fix all whoami health to 500
client := &http.Client{}
whoamiHosts := []string{s.whoami1IP, s.whoami2IP}
for _, whoami := range whoamiHosts {
statusInternalServerErrorReq, err := http.NewRequest(http.MethodPost, "http://"+whoami+"/health", bytes.NewBuffer([]byte("500")))
c.Assert(err, checker.IsNil)
_, err = client.Do(statusInternalServerErrorReq)
c.Assert(err, checker.IsNil)
}
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// Verify no backend service is available due to failing health checks
err = try.Request(frontendHealthReq, 3*time.Second, try.StatusCodeIs(http.StatusServiceUnavailable))
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c.Assert(err, checker.IsNil)
// Change one whoami health to 200
statusOKReq1, err := http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBuffer([]byte("200")))
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c.Assert(err, checker.IsNil)
_, err = client.Do(statusOKReq1)
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c.Assert(err, checker.IsNil)
// Verify frontend health : after
err = try.Request(frontendHealthReq, 3*time.Second, try.StatusCodeIs(http.StatusOK))
c.Assert(err, checker.IsNil)
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frontendReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/", nil)
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c.Assert(err, checker.IsNil)
frontendReq.Host = "test.localhost"
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// Check if whoami1 responds
err = try.Request(frontendReq, 500*time.Millisecond, try.BodyContains(s.whoami1IP))
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c.Assert(err, checker.IsNil)
// Check if the service with bad health check (whoami2) never respond.
err = try.Request(frontendReq, 2*time.Second, try.BodyContains(s.whoami2IP))
c.Assert(err, checker.Not(checker.IsNil))
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// TODO validate : run on 80
resp, err := http.Get("http://127.0.0.1:8000/")
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// Expected a 404 as we did not configure anything
c.Assert(err, checker.IsNil)
c.Assert(resp.StatusCode, checker.Equals, http.StatusNotFound)
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}
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func (s *HealthCheckSuite) TestMultipleEntrypoints(c *check.C) {
file := s.adaptFile(c, "fixtures/healthcheck/multiple-entrypoints.toml", struct {
Server1 string
Server2 string
}{s.whoami1IP, s.whoami2IP})
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)
// Wait for traefik
err = try.GetRequest("http://localhost:8080/api/rawdata", 60*time.Second, try.BodyContains("Host(`test.localhost`)"))
c.Assert(err, checker.IsNil)
// Check entrypoint http1
frontendHealthReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/health", nil)
c.Assert(err, checker.IsNil)
frontendHealthReq.Host = "test.localhost"
err = try.Request(frontendHealthReq, 500*time.Millisecond, try.StatusCodeIs(http.StatusOK))
c.Assert(err, checker.IsNil)
// Check entrypoint http2
frontendHealthReq, err = http.NewRequest(http.MethodGet, "http://127.0.0.1:9000/health", nil)
c.Assert(err, checker.IsNil)
frontendHealthReq.Host = "test.localhost"
err = try.Request(frontendHealthReq, 500*time.Millisecond, try.StatusCodeIs(http.StatusOK))
c.Assert(err, checker.IsNil)
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// Set the both whoami health to 500
client := &http.Client{}
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whoamiHosts := []string{s.whoami1IP, s.whoami2IP}
for _, whoami := range whoamiHosts {
statusInternalServerErrorReq, err := http.NewRequest(http.MethodPost, "http://"+whoami+"/health", bytes.NewBuffer([]byte("500")))
c.Assert(err, checker.IsNil)
_, err = client.Do(statusInternalServerErrorReq)
c.Assert(err, checker.IsNil)
}
// Verify no backend service is available due to failing health checks
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err = try.Request(frontendHealthReq, 5*time.Second, try.StatusCodeIs(http.StatusServiceUnavailable))
c.Assert(err, checker.IsNil)
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// reactivate the whoami2
statusInternalServerOkReq, err := http.NewRequest(http.MethodPost, "http://"+s.whoami2IP+"/health", bytes.NewBuffer([]byte("200")))
c.Assert(err, checker.IsNil)
_, err = client.Do(statusInternalServerOkReq)
c.Assert(err, checker.IsNil)
frontend1Req, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/", nil)
c.Assert(err, checker.IsNil)
frontend1Req.Host = "test.localhost"
frontend2Req, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:9000/", nil)
c.Assert(err, checker.IsNil)
frontend2Req.Host = "test.localhost"
// Check if whoami1 never responds
err = try.Request(frontend2Req, 2*time.Second, try.BodyContains(s.whoami1IP))
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c.Assert(err, checker.NotNil)
// Check if whoami1 never responds
err = try.Request(frontend1Req, 2*time.Second, try.BodyContains(s.whoami1IP))
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c.Assert(err, checker.NotNil)
}
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func (s *HealthCheckSuite) TestPortOverload(c *check.C) {
// Set one whoami health to 200
client := &http.Client{}
statusInternalServerErrorReq, err := http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBuffer([]byte("200")))
c.Assert(err, checker.IsNil)
_, err = client.Do(statusInternalServerErrorReq)
c.Assert(err, checker.IsNil)
file := s.adaptFile(c, "fixtures/healthcheck/port_overload.toml", struct {
Server1 string
}{s.whoami1IP})
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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// wait for traefik
err = try.GetRequest("http://127.0.0.1:8080/api/rawdata", 10*time.Second, try.BodyContains("Host(`test.localhost`)"))
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c.Assert(err, checker.IsNil)
frontendHealthReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/health", nil)
c.Assert(err, checker.IsNil)
frontendHealthReq.Host = "test.localhost"
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// We test bad gateway because we use an invalid port for the backend
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err = try.Request(frontendHealthReq, 500*time.Millisecond, try.StatusCodeIs(http.StatusBadGateway))
c.Assert(err, checker.IsNil)
// Set one whoami health to 500
statusInternalServerErrorReq, err = http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBuffer([]byte("500")))
c.Assert(err, checker.IsNil)
_, err = client.Do(statusInternalServerErrorReq)
c.Assert(err, checker.IsNil)
// Verify no backend service is available due to failing health checks
err = try.Request(frontendHealthReq, 3*time.Second, try.StatusCodeIs(http.StatusServiceUnavailable))
c.Assert(err, checker.IsNil)
}
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// Checks if all the loadbalancers created will correctly update the server status.
func (s *HealthCheckSuite) TestMultipleRoutersOnSameService(c *check.C) {
file := s.adaptFile(c, "fixtures/healthcheck/multiple-routers-one-same-service.toml", struct {
Server1 string
}{s.whoami1IP})
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)
// wait for traefik
err = try.GetRequest("http://127.0.0.1:8080/api/rawdata", 60*time.Second, try.BodyContains("Host(`test.localhost`)"))
c.Assert(err, checker.IsNil)
// Set whoami health to 200 to be sure to start with the wanted status
client := &http.Client{}
statusOkReq, err := http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBuffer([]byte("200")))
c.Assert(err, checker.IsNil)
_, err = client.Do(statusOkReq)
c.Assert(err, checker.IsNil)
// check healthcheck on web1 entrypoint
healthReqWeb1, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/health", nil)
c.Assert(err, checker.IsNil)
healthReqWeb1.Host = "test.localhost"
err = try.Request(healthReqWeb1, 1*time.Second, try.StatusCodeIs(http.StatusOK))
c.Assert(err, checker.IsNil)
// check healthcheck on web2 entrypoint
healthReqWeb2, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:9000/health", nil)
c.Assert(err, checker.IsNil)
healthReqWeb2.Host = "test.localhost"
err = try.Request(healthReqWeb2, 500*time.Millisecond, try.StatusCodeIs(http.StatusOK))
c.Assert(err, checker.IsNil)
// Set whoami health to 500
statusInternalServerErrorReq, err := http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBuffer([]byte("500")))
c.Assert(err, checker.IsNil)
_, err = client.Do(statusInternalServerErrorReq)
c.Assert(err, checker.IsNil)
// Verify no backend service is available due to failing health checks
err = try.Request(healthReqWeb1, 3*time.Second, try.StatusCodeIs(http.StatusServiceUnavailable))
c.Assert(err, checker.IsNil)
err = try.Request(healthReqWeb2, 3*time.Second, try.StatusCodeIs(http.StatusServiceUnavailable))
c.Assert(err, checker.IsNil)
// Change one whoami health to 200
statusOKReq1, err := http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBuffer([]byte("200")))
c.Assert(err, checker.IsNil)
_, err = client.Do(statusOKReq1)
c.Assert(err, checker.IsNil)
// Verify health check
err = try.Request(healthReqWeb1, 3*time.Second, try.StatusCodeIs(http.StatusOK))
c.Assert(err, checker.IsNil)
err = try.Request(healthReqWeb2, 3*time.Second, try.StatusCodeIs(http.StatusOK))
c.Assert(err, checker.IsNil)
}