traefik/integration/healthcheck_test.go

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package integration
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import (
"bytes"
"fmt"
"io"
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"net/http"
"os"
"strings"
"testing"
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"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/stretchr/testify/suite"
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"github.com/traefik/traefik/v3/integration/try"
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)
// HealthCheck test suites.
type HealthCheckSuite struct {
BaseSuite
whoami1IP string
whoami2IP string
whoami3IP string
whoami4IP string
}
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func TestHealthCheckSuite(t *testing.T) {
suite.Run(t, new(HealthCheckSuite))
}
func (s *HealthCheckSuite) SetupSuite() {
s.BaseSuite.SetupSuite()
s.createComposeProject("healthcheck")
s.composeUp()
s.whoami1IP = s.getComposeServiceIP("whoami1")
s.whoami2IP = s.getComposeServiceIP("whoami2")
s.whoami3IP = s.getComposeServiceIP("whoami3")
s.whoami4IP = s.getComposeServiceIP("whoami4")
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}
func (s *HealthCheckSuite) TearDownSuite() {
s.BaseSuite.TearDownSuite()
}
func (s *HealthCheckSuite) TestSimpleConfiguration() {
file := s.adaptFile("fixtures/healthcheck/simple.toml", struct {
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Server1 string
Server2 string
}{s.whoami1IP, s.whoami2IP})
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s.traefikCmd(withConfigFile(file))
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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`)"))
require.NoError(s.T(), err)
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frontendHealthReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/health", nil)
require.NoError(s.T(), err)
frontendHealthReq.Host = "test.localhost"
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err = try.Request(frontendHealthReq, 500*time.Millisecond, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
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// Fix all whoami health to 500
client := &http.Client{}
whoamiHosts := []string{s.whoami1IP, s.whoami2IP}
for _, whoami := range whoamiHosts {
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statusInternalServerErrorReq, err := http.NewRequest(http.MethodPost, "http://"+whoami+"/health", bytes.NewBufferString("500"))
require.NoError(s.T(), err)
_, err = client.Do(statusInternalServerErrorReq)
require.NoError(s.T(), err)
}
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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))
require.NoError(s.T(), err)
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// Change one whoami health to 200
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statusOKReq1, err := http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBufferString("200"))
require.NoError(s.T(), err)
_, err = client.Do(statusOKReq1)
require.NoError(s.T(), err)
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// Verify frontend health : after
err = try.Request(frontendHealthReq, 3*time.Second, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
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frontendReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/", nil)
require.NoError(s.T(), err)
frontendReq.Host = "test.localhost"
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// Check if whoami1 responds
err = try.Request(frontendReq, 500*time.Millisecond, try.BodyContains(s.whoami1IP))
require.NoError(s.T(), err)
// Check if the service with bad health check (whoami2) never respond.
err = try.Request(frontendReq, 2*time.Second, try.BodyContains(s.whoami2IP))
assert.Error(s.T(), err)
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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
require.NoError(s.T(), err)
assert.Equal(s.T(), http.StatusNotFound, resp.StatusCode)
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}
func (s *HealthCheckSuite) TestMultipleEntrypoints() {
file := s.adaptFile("fixtures/healthcheck/multiple-entrypoints.toml", struct {
Server1 string
Server2 string
}{s.whoami1IP, s.whoami2IP})
s.traefikCmd(withConfigFile(file))
// Wait for traefik
err := try.GetRequest("http://127.0.0.1:8080/api/rawdata", 60*time.Second, try.BodyContains("Host(`test.localhost`)"))
require.NoError(s.T(), err)
// Check entrypoint http1
frontendHealthReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/health", nil)
require.NoError(s.T(), err)
frontendHealthReq.Host = "test.localhost"
err = try.Request(frontendHealthReq, 5*time.Second, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
// Check entrypoint http2
frontendHealthReq, err = http.NewRequest(http.MethodGet, "http://127.0.0.1:9000/health", nil)
require.NoError(s.T(), err)
frontendHealthReq.Host = "test.localhost"
err = try.Request(frontendHealthReq, 5*time.Second, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
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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 {
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statusInternalServerErrorReq, err := http.NewRequest(http.MethodPost, "http://"+whoami+"/health", bytes.NewBufferString("500"))
require.NoError(s.T(), err)
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_, err = client.Do(statusInternalServerErrorReq)
require.NoError(s.T(), err)
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}
// 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))
require.NoError(s.T(), err)
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// reactivate the whoami2
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statusInternalServerOkReq, err := http.NewRequest(http.MethodPost, "http://"+s.whoami2IP+"/health", bytes.NewBufferString("200"))
require.NoError(s.T(), err)
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_, err = client.Do(statusInternalServerOkReq)
require.NoError(s.T(), err)
frontend1Req, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/", nil)
require.NoError(s.T(), err)
frontend1Req.Host = "test.localhost"
frontend2Req, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:9000/", nil)
require.NoError(s.T(), err)
frontend2Req.Host = "test.localhost"
// Check if whoami1 never responds
err = try.Request(frontend2Req, 2*time.Second, try.BodyContains(s.whoami1IP))
assert.Error(s.T(), err)
// Check if whoami1 never responds
err = try.Request(frontend1Req, 2*time.Second, try.BodyContains(s.whoami1IP))
assert.Error(s.T(), err)
}
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func (s *HealthCheckSuite) TestPortOverload() {
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// Set one whoami health to 200
client := &http.Client{}
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statusInternalServerErrorReq, err := http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBufferString("200"))
require.NoError(s.T(), err)
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_, err = client.Do(statusInternalServerErrorReq)
require.NoError(s.T(), err)
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file := s.adaptFile("fixtures/healthcheck/port_overload.toml", struct {
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Server1 string
}{s.whoami1IP})
s.traefikCmd(withConfigFile(file))
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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`)"))
require.NoError(s.T(), err)
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frontendHealthReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/health", nil)
require.NoError(s.T(), err)
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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))
require.NoError(s.T(), err)
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// Set one whoami health to 500
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statusInternalServerErrorReq, err = http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBufferString("500"))
require.NoError(s.T(), err)
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_, err = client.Do(statusInternalServerErrorReq)
require.NoError(s.T(), err)
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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))
require.NoError(s.T(), err)
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}
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// Checks if all the loadbalancers created will correctly update the server status.
func (s *HealthCheckSuite) TestMultipleRoutersOnSameService() {
file := s.adaptFile("fixtures/healthcheck/multiple-routers-one-same-service.toml", struct {
Server1 string
}{s.whoami1IP})
s.traefikCmd(withConfigFile(file))
// wait for traefik
err := try.GetRequest("http://127.0.0.1:8080/api/rawdata", 60*time.Second, try.BodyContains("Host(`test.localhost`)"))
require.NoError(s.T(), err)
// Set whoami health to 200 to be sure to start with the wanted status
client := &http.Client{}
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statusOkReq, err := http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBufferString("200"))
require.NoError(s.T(), err)
_, err = client.Do(statusOkReq)
require.NoError(s.T(), err)
// check healthcheck on web1 entrypoint
healthReqWeb1, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000/health", nil)
require.NoError(s.T(), err)
healthReqWeb1.Host = "test.localhost"
err = try.Request(healthReqWeb1, 1*time.Second, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
// check healthcheck on web2 entrypoint
healthReqWeb2, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:9000/health", nil)
require.NoError(s.T(), err)
healthReqWeb2.Host = "test.localhost"
err = try.Request(healthReqWeb2, 500*time.Millisecond, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
// Set whoami health to 500
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statusInternalServerErrorReq, err := http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBufferString("500"))
require.NoError(s.T(), err)
_, err = client.Do(statusInternalServerErrorReq)
require.NoError(s.T(), err)
// Verify no backend service is available due to failing health checks
err = try.Request(healthReqWeb1, 3*time.Second, try.StatusCodeIs(http.StatusServiceUnavailable))
require.NoError(s.T(), err)
err = try.Request(healthReqWeb2, 3*time.Second, try.StatusCodeIs(http.StatusServiceUnavailable))
require.NoError(s.T(), err)
// Change one whoami health to 200
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statusOKReq1, err := http.NewRequest(http.MethodPost, "http://"+s.whoami1IP+"/health", bytes.NewBufferString("200"))
require.NoError(s.T(), err)
_, err = client.Do(statusOKReq1)
require.NoError(s.T(), err)
// Verify health check
err = try.Request(healthReqWeb1, 3*time.Second, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
err = try.Request(healthReqWeb2, 3*time.Second, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
}
func (s *HealthCheckSuite) TestPropagate() {
file := s.adaptFile("fixtures/healthcheck/propagate.toml", struct {
Server1 string
Server2 string
Server3 string
Server4 string
}{s.whoami1IP, s.whoami2IP, s.whoami3IP, s.whoami4IP})
s.traefikCmd(withConfigFile(file))
// wait for traefik
err := try.GetRequest("http://127.0.0.1:8080/api/rawdata", 60*time.Second, try.BodyContains("Host(`root.localhost`)"))
require.NoError(s.T(), err)
rootReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000", nil)
require.NoError(s.T(), err)
rootReq.Host = "root.localhost"
err = try.Request(rootReq, 500*time.Millisecond, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
// Bring whoami1 and whoami3 down
client := http.Client{
Timeout: 10 * time.Second,
}
whoamiHosts := []string{s.whoami1IP, s.whoami3IP}
for _, whoami := range whoamiHosts {
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statusInternalServerErrorReq, err := http.NewRequest(http.MethodPost, "http://"+whoami+"/health", bytes.NewBufferString("500"))
require.NoError(s.T(), err)
_, err = client.Do(statusInternalServerErrorReq)
require.NoError(s.T(), err)
}
try.Sleep(time.Second)
want2 := `IP: ` + s.whoami2IP
want4 := `IP: ` + s.whoami4IP
// Verify load-balancing on root still works, and that we're getting an alternation between wsp2, and wsp4.
reachedServers := make(map[string]int)
for i := 0; i < 4; i++ {
resp, err := client.Do(rootReq)
require.NoError(s.T(), err)
body, err := io.ReadAll(resp.Body)
require.NoError(s.T(), err)
if reachedServers[s.whoami4IP] > reachedServers[s.whoami2IP] {
assert.Contains(s.T(), string(body), want2)
reachedServers[s.whoami2IP]++
continue
}
if reachedServers[s.whoami2IP] > reachedServers[s.whoami4IP] {
assert.Contains(s.T(), string(body), want4)
reachedServers[s.whoami4IP]++
continue
}
// First iteration, so we can't tell whether it's going to be wsp2, or wsp4.
if strings.Contains(string(body), `IP: `+s.whoami4IP) {
reachedServers[s.whoami4IP]++
continue
}
if strings.Contains(string(body), `IP: `+s.whoami2IP) {
reachedServers[s.whoami2IP]++
continue
}
}
assert.Equal(s.T(), 2, reachedServers[s.whoami2IP])
assert.Equal(s.T(), 2, reachedServers[s.whoami4IP])
fooReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000", nil)
require.NoError(s.T(), err)
fooReq.Host = "foo.localhost"
// Verify load-balancing on foo still works, and that we're getting wsp2, wsp2, wsp2, wsp2, etc.
want := `IP: ` + s.whoami2IP
for i := 0; i < 4; i++ {
resp, err := client.Do(fooReq)
require.NoError(s.T(), err)
body, err := io.ReadAll(resp.Body)
require.NoError(s.T(), err)
assert.Contains(s.T(), string(body), want)
}
barReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000", nil)
require.NoError(s.T(), err)
barReq.Host = "bar.localhost"
// Verify load-balancing on bar still works, and that we're getting wsp2, wsp2, wsp2, wsp2, etc.
want = `IP: ` + s.whoami2IP
for i := 0; i < 4; i++ {
resp, err := client.Do(barReq)
require.NoError(s.T(), err)
body, err := io.ReadAll(resp.Body)
require.NoError(s.T(), err)
assert.Contains(s.T(), string(body), want)
}
// Bring whoami2 and whoami4 down
whoamiHosts = []string{s.whoami2IP, s.whoami4IP}
for _, whoami := range whoamiHosts {
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statusInternalServerErrorReq, err := http.NewRequest(http.MethodPost, "http://"+whoami+"/health", bytes.NewBufferString("500"))
require.NoError(s.T(), err)
_, err = client.Do(statusInternalServerErrorReq)
require.NoError(s.T(), err)
}
try.Sleep(time.Second)
// Verify that everything is down, and that we get 503s everywhere.
for i := 0; i < 2; i++ {
resp, err := client.Do(rootReq)
require.NoError(s.T(), err)
assert.Equal(s.T(), http.StatusServiceUnavailable, resp.StatusCode)
resp, err = client.Do(fooReq)
require.NoError(s.T(), err)
assert.Equal(s.T(), http.StatusServiceUnavailable, resp.StatusCode)
resp, err = client.Do(barReq)
require.NoError(s.T(), err)
assert.Equal(s.T(), http.StatusServiceUnavailable, resp.StatusCode)
}
// Bring everything back up.
whoamiHosts = []string{s.whoami1IP, s.whoami2IP, s.whoami3IP, s.whoami4IP}
for _, whoami := range whoamiHosts {
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statusOKReq, err := http.NewRequest(http.MethodPost, "http://"+whoami+"/health", bytes.NewBufferString("200"))
require.NoError(s.T(), err)
_, err = client.Do(statusOKReq)
require.NoError(s.T(), err)
}
try.Sleep(time.Second)
// Verify everything is up on root router.
reachedServers = make(map[string]int)
for i := 0; i < 4; i++ {
resp, err := client.Do(rootReq)
require.NoError(s.T(), err)
body, err := io.ReadAll(resp.Body)
require.NoError(s.T(), err)
if strings.Contains(string(body), `IP: `+s.whoami1IP) {
reachedServers[s.whoami1IP]++
continue
}
if strings.Contains(string(body), `IP: `+s.whoami2IP) {
reachedServers[s.whoami2IP]++
continue
}
if strings.Contains(string(body), `IP: `+s.whoami3IP) {
reachedServers[s.whoami3IP]++
continue
}
if strings.Contains(string(body), `IP: `+s.whoami4IP) {
reachedServers[s.whoami4IP]++
continue
}
}
assert.Equal(s.T(), 1, reachedServers[s.whoami1IP])
assert.Equal(s.T(), 1, reachedServers[s.whoami2IP])
assert.Equal(s.T(), 1, reachedServers[s.whoami3IP])
assert.Equal(s.T(), 1, reachedServers[s.whoami4IP])
// Verify everything is up on foo router.
reachedServers = make(map[string]int)
for i := 0; i < 4; i++ {
resp, err := client.Do(fooReq)
require.NoError(s.T(), err)
body, err := io.ReadAll(resp.Body)
require.NoError(s.T(), err)
if strings.Contains(string(body), `IP: `+s.whoami1IP) {
reachedServers[s.whoami1IP]++
continue
}
if strings.Contains(string(body), `IP: `+s.whoami2IP) {
reachedServers[s.whoami2IP]++
continue
}
if strings.Contains(string(body), `IP: `+s.whoami3IP) {
reachedServers[s.whoami3IP]++
continue
}
if strings.Contains(string(body), `IP: `+s.whoami4IP) {
reachedServers[s.whoami4IP]++
continue
}
}
assert.Equal(s.T(), 2, reachedServers[s.whoami1IP])
assert.Equal(s.T(), 1, reachedServers[s.whoami2IP])
assert.Equal(s.T(), 1, reachedServers[s.whoami3IP])
assert.Equal(s.T(), 0, reachedServers[s.whoami4IP])
// Verify everything is up on bar router.
reachedServers = make(map[string]int)
for i := 0; i < 4; i++ {
resp, err := client.Do(barReq)
require.NoError(s.T(), err)
body, err := io.ReadAll(resp.Body)
require.NoError(s.T(), err)
if strings.Contains(string(body), `IP: `+s.whoami1IP) {
reachedServers[s.whoami1IP]++
continue
}
if strings.Contains(string(body), `IP: `+s.whoami2IP) {
reachedServers[s.whoami2IP]++
continue
}
if strings.Contains(string(body), `IP: `+s.whoami3IP) {
reachedServers[s.whoami3IP]++
continue
}
if strings.Contains(string(body), `IP: `+s.whoami4IP) {
reachedServers[s.whoami4IP]++
continue
}
}
assert.Equal(s.T(), 2, reachedServers[s.whoami1IP])
assert.Equal(s.T(), 1, reachedServers[s.whoami2IP])
assert.Equal(s.T(), 1, reachedServers[s.whoami3IP])
assert.Equal(s.T(), 0, reachedServers[s.whoami4IP])
}
func (s *HealthCheckSuite) TestPropagateNoHealthCheck() {
file := s.adaptFile("fixtures/healthcheck/propagate_no_healthcheck.toml", struct {
Server1 string
}{s.whoami1IP})
s.traefikCmd(withConfigFile(file))
// wait for traefik
err := try.GetRequest("http://127.0.0.1:8080/api/rawdata", 60*time.Second, try.BodyContains("Host(`noop.localhost`)"), try.BodyNotContains("Host(`root.localhost`)"))
require.NoError(s.T(), err)
rootReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000", nil)
require.NoError(s.T(), err)
rootReq.Host = "root.localhost"
err = try.Request(rootReq, 500*time.Millisecond, try.StatusCodeIs(http.StatusNotFound))
require.NoError(s.T(), err)
}
func (s *HealthCheckSuite) TestPropagateReload() {
// Setup a WSP service without the healthcheck enabled (wsp-service1)
withoutHealthCheck := s.adaptFile("fixtures/healthcheck/reload_without_healthcheck.toml", struct {
Server1 string
Server2 string
}{s.whoami1IP, s.whoami2IP})
withHealthCheck := s.adaptFile("fixtures/healthcheck/reload_with_healthcheck.toml", struct {
Server1 string
Server2 string
}{s.whoami1IP, s.whoami2IP})
s.traefikCmd(withConfigFile(withoutHealthCheck))
// wait for traefik
err := try.GetRequest("http://127.0.0.1:8080/api/rawdata", 60*time.Second, try.BodyContains("Host(`root.localhost`)"))
require.NoError(s.T(), err)
// Allow one of the underlying services on it to fail all servers HC (whoami2)
client := http.Client{
Timeout: 10 * time.Second,
}
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statusOKReq, err := http.NewRequest(http.MethodPost, "http://"+s.whoami2IP+"/health", bytes.NewBufferString("500"))
require.NoError(s.T(), err)
_, err = client.Do(statusOKReq)
require.NoError(s.T(), err)
rootReq, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8000", nil)
require.NoError(s.T(), err)
rootReq.Host = "root.localhost"
// Check the failed service (whoami2) is getting requests, but answer 500
err = try.Request(rootReq, 500*time.Millisecond, try.StatusCodeIs(http.StatusServiceUnavailable))
require.NoError(s.T(), err)
// Enable the healthcheck on the root WSP (wsp-service1) and let Traefik reload the config
fr1, err := os.OpenFile(withoutHealthCheck, os.O_APPEND|os.O_WRONLY, 0o644)
assert.NotNil(s.T(), fr1)
require.NoError(s.T(), err)
err = fr1.Truncate(0)
require.NoError(s.T(), err)
fr2, err := os.ReadFile(withHealthCheck)
require.NoError(s.T(), err)
_, err = fmt.Fprint(fr1, string(fr2))
require.NoError(s.T(), err)
err = fr1.Close()
require.NoError(s.T(), err)
// Waiting for the reflected change.
err = try.Request(rootReq, 5*time.Second, try.StatusCodeIs(http.StatusOK))
require.NoError(s.T(), err)
// Check the failed service (whoami2) is not getting requests
wantIPs := []string{s.whoami1IP, s.whoami1IP, s.whoami1IP, s.whoami1IP}
for _, ip := range wantIPs {
err = try.Request(rootReq, 5*time.Second, try.StatusCodeIs(http.StatusOK), try.BodyContains("IP: "+ip))
require.NoError(s.T(), err)
}
}