traefik/integration/integration_test.go

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// This is the main file that sets up integration tests using go-check.
package integration
import (
"bytes"
"context"
"errors"
"flag"
"fmt"
"io"
"io/fs"
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stdlog "log"
"net/http"
"os"
"os/exec"
"path/filepath"
"regexp"
"slices"
"strings"
"testing"
"text/template"
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"time"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/mount"
dockernetwork "github.com/docker/docker/api/types/network"
"github.com/fatih/structs"
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"github.com/rs/zerolog/log"
"github.com/stretchr/testify/require"
"github.com/stretchr/testify/suite"
"github.com/testcontainers/testcontainers-go"
"github.com/testcontainers/testcontainers-go/network"
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"github.com/traefik/traefik/v3/integration/try"
"gopkg.in/yaml.v3"
)
var showLog = flag.Bool("tlog", false, "always show Traefik logs")
type composeConfig struct {
Services map[string]composeService `yaml:"services"`
}
type composeService struct {
Image string `yaml:"image"`
Labels map[string]string `yaml:"labels"`
Hostname string `yaml:"hostname"`
Volumes []string `yaml:"volumes"`
CapAdd []string `yaml:"cap_add"`
Command []string `yaml:"command"`
Environment map[string]string `yaml:"environment"`
Privileged bool `yaml:"privileged"`
Deploy composeDeploy `yaml:"deploy"`
}
type composeDeploy struct {
Replicas int `yaml:"replicas"`
}
var traefikBinary = "../dist/traefik"
type BaseSuite struct {
suite.Suite
containers map[string]testcontainers.Container
network *testcontainers.DockerNetwork
hostIP string
}
func (s *BaseSuite) waitForTraefik(containerName string) {
time.Sleep(1 * time.Second)
// Wait for Traefik to turn ready.
req, err := http.NewRequest(http.MethodGet, "http://127.0.0.1:8080/api/rawdata", nil)
require.NoError(s.T(), err)
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err = try.Request(req, 2*time.Second, try.StatusCodeIs(http.StatusOK), try.BodyContains(containerName))
require.NoError(s.T(), err)
}
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func (s *BaseSuite) displayTraefikLogFile(path string) {
if s.T().Failed() {
if _, err := os.Stat(path); !os.IsNotExist(err) {
content, errRead := os.ReadFile(path)
// TODO TestName
// fmt.Printf("%s: Traefik logs: \n", c.TestName())
fmt.Print("Traefik logs: \n")
if errRead == nil {
fmt.Println(content)
} else {
fmt.Println(errRead)
}
} else {
// fmt.Printf("%s: No Traefik logs.\n", c.TestName())
fmt.Print("No Traefik logs.\n")
}
errRemove := os.Remove(path)
if errRemove != nil {
fmt.Println(errRemove)
}
}
}
func (s *BaseSuite) SetupSuite() {
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// configure default standard log.
stdlog.SetFlags(stdlog.Lshortfile | stdlog.LstdFlags)
// TODO
// stdlog.SetOutput(log.Logger)
ctx := context.Background()
// Create docker network
// docker network create traefik-test-network --driver bridge --subnet 172.31.42.0/24
var opts []network.NetworkCustomizer
opts = append(opts, network.WithDriver("bridge"))
opts = append(opts, network.WithIPAM(&dockernetwork.IPAM{
Driver: "default",
Config: []dockernetwork.IPAMConfig{
{
Subnet: "172.31.42.0/24",
},
},
}))
dockerNetwork, err := network.New(ctx, opts...)
require.NoError(s.T(), err)
s.network = dockerNetwork
s.hostIP = "172.31.42.1"
if isDockerDesktop(ctx, s.T()) {
s.hostIP = getDockerDesktopHostIP(ctx, s.T())
s.setupVPN("tailscale.secret")
}
}
func getDockerDesktopHostIP(ctx context.Context, t *testing.T) string {
t.Helper()
req := testcontainers.ContainerRequest{
Image: "alpine",
HostConfigModifier: func(config *container.HostConfig) {
config.AutoRemove = true
},
Cmd: []string{"getent", "hosts", "host.docker.internal"},
}
con, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
ContainerRequest: req,
Started: true,
})
require.NoError(t, err)
closer, err := con.Logs(ctx)
require.NoError(t, err)
all, err := io.ReadAll(closer)
require.NoError(t, err)
ipRegex := regexp.MustCompile(`\b(?:\d{1,3}\.){3}\d{1,3}\b`)
matches := ipRegex.FindAllString(string(all), -1)
require.Len(t, matches, 1)
return matches[0]
}
func isDockerDesktop(ctx context.Context, t *testing.T) bool {
t.Helper()
cli, err := testcontainers.NewDockerClientWithOpts(ctx)
if err != nil {
t.Fatalf("failed to create docker client: %s", err)
}
info, err := cli.Info(ctx)
if err != nil {
t.Fatalf("failed to get docker info: %s", err)
}
return info.OperatingSystem == "Docker Desktop"
}
func (s *BaseSuite) TearDownSuite() {
s.composeDown()
err := try.Do(5*time.Second, func() error {
if s.network != nil {
err := s.network.Remove(context.Background())
if err != nil {
return err
}
}
return nil
})
require.NoError(s.T(), err)
}
// createComposeProject creates the docker compose project stored as a field in the BaseSuite.
// This method should be called before starting and/or stopping compose services.
func (s *BaseSuite) createComposeProject(name string) {
composeFile := fmt.Sprintf("resources/compose/%s.yml", name)
file, err := os.ReadFile(composeFile)
require.NoError(s.T(), err)
var composeConfigData composeConfig
err = yaml.Unmarshal(file, &composeConfigData)
require.NoError(s.T(), err)
if s.containers == nil {
s.containers = map[string]testcontainers.Container{}
}
ctx := context.Background()
for id, containerConfig := range composeConfigData.Services {
var mounts []mount.Mount
for _, volume := range containerConfig.Volumes {
split := strings.Split(volume, ":")
if len(split) != 2 {
continue
}
if strings.HasPrefix(split[0], "./") {
path, err := os.Getwd()
if err != nil {
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log.Err(err).Msg("can't determine current directory")
continue
}
split[0] = strings.Replace(split[0], "./", path+"/", 1)
}
abs, err := filepath.Abs(split[0])
require.NoError(s.T(), err)
mounts = append(mounts, mount.Mount{Source: abs, Target: split[1], Type: mount.TypeBind})
}
if containerConfig.Deploy.Replicas > 0 {
for i := 0; i < containerConfig.Deploy.Replicas; i++ {
id = fmt.Sprintf("%s-%d", id, i+1)
con, err := s.createContainer(ctx, containerConfig, id, mounts)
require.NoError(s.T(), err)
s.containers[id] = con
}
continue
}
con, err := s.createContainer(ctx, containerConfig, id, mounts)
require.NoError(s.T(), err)
s.containers[id] = con
}
}
func (s *BaseSuite) createContainer(ctx context.Context, containerConfig composeService, id string, mounts []mount.Mount) (testcontainers.Container, error) {
req := testcontainers.ContainerRequest{
Image: containerConfig.Image,
Env: containerConfig.Environment,
Cmd: containerConfig.Command,
Labels: containerConfig.Labels,
Name: id,
Hostname: containerConfig.Hostname,
Privileged: containerConfig.Privileged,
Networks: []string{s.network.Name},
HostConfigModifier: func(config *container.HostConfig) {
if containerConfig.CapAdd != nil {
config.CapAdd = containerConfig.CapAdd
}
if !isDockerDesktop(ctx, s.T()) {
config.ExtraHosts = append(config.ExtraHosts, "host.docker.internal:"+s.hostIP)
}
config.Mounts = mounts
},
}
con, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
ContainerRequest: req,
Started: false,
})
return con, err
}
// composeUp starts the given services of the current docker compose project, if they are not already started.
// Already running services are not affected (i.e. not stopped).
func (s *BaseSuite) composeUp(services ...string) {
for name, con := range s.containers {
if len(services) == 0 || slices.Contains(services, name) {
err := con.Start(context.Background())
require.NoError(s.T(), err)
}
}
}
// composeStop stops the given services of the current docker compose project and removes the corresponding containers.
func (s *BaseSuite) composeStop(services ...string) {
for name, con := range s.containers {
if len(services) == 0 || slices.Contains(services, name) {
timeout := 10 * time.Second
err := con.Stop(context.Background(), &timeout)
require.NoError(s.T(), err)
}
}
}
// composeDown stops all compose project services and removes the corresponding containers.
func (s *BaseSuite) composeDown() {
for _, c := range s.containers {
err := c.Terminate(context.Background())
require.NoError(s.T(), err)
}
s.containers = map[string]testcontainers.Container{}
}
func (s *BaseSuite) cmdTraefik(args ...string) (*exec.Cmd, *bytes.Buffer) {
cmd := exec.Command(traefikBinary, args...)
s.T().Cleanup(func() {
s.killCmd(cmd)
})
var out bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = &out
err := cmd.Start()
require.NoError(s.T(), err)
return cmd, &out
}
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func (s *BaseSuite) killCmd(cmd *exec.Cmd) {
if cmd.Process == nil {
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log.Error().Msg("No process to kill")
return
}
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err := cmd.Process.Kill()
if err != nil {
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log.Error().Err(err).Msg("Kill")
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}
time.Sleep(100 * time.Millisecond)
}
func (s *BaseSuite) traefikCmd(args ...string) *exec.Cmd {
cmd, out := s.cmdTraefik(args...)
s.T().Cleanup(func() {
if s.T().Failed() || *showLog {
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s.displayLogK3S()
s.displayLogCompose()
s.displayTraefikLog(out)
}
})
return cmd
}
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func (s *BaseSuite) displayLogK3S() {
filePath := "./fixtures/k8s/config.skip/k3s.log"
if _, err := os.Stat(filePath); err == nil {
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content, errR := os.ReadFile(filePath)
if errR != nil {
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log.Error().Err(errR).Send()
}
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log.Print(string(content))
}
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log.Print()
log.Print("################################")
log.Print()
}
func (s *BaseSuite) displayLogCompose() {
for name, ctn := range s.containers {
readCloser, err := ctn.Logs(context.Background())
require.NoError(s.T(), err)
for {
b := make([]byte, 1024)
_, err := readCloser.Read(b)
if errors.Is(err, io.EOF) {
break
}
require.NoError(s.T(), err)
trimLogs := bytes.Trim(bytes.TrimSpace(b), string([]byte{0}))
if len(trimLogs) > 0 {
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log.Info().Str("container", name).Msg(string(trimLogs))
}
}
}
}
func (s *BaseSuite) displayTraefikLog(output *bytes.Buffer) {
if output == nil || output.Len() == 0 {
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log.Info().Msg("No Traefik logs.")
} else {
for _, line := range strings.Split(output.String(), "\n") {
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log.Info().Msg(line)
}
}
}
func (s *BaseSuite) getDockerHost() string {
dockerHost := os.Getenv("DOCKER_HOST")
if dockerHost == "" {
// Default docker socket
dockerHost = "unix:///var/run/docker.sock"
}
return dockerHost
}
func (s *BaseSuite) adaptFile(path string, tempObjects interface{}) string {
// Load file
tmpl, err := template.ParseFiles(path)
require.NoError(s.T(), err)
folder, prefix := filepath.Split(path)
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tmpFile, err := os.CreateTemp(folder, strings.TrimSuffix(prefix, filepath.Ext(prefix))+"_*"+filepath.Ext(prefix))
require.NoError(s.T(), err)
defer tmpFile.Close()
model := structs.Map(tempObjects)
model["SelfFilename"] = tmpFile.Name()
err = tmpl.ExecuteTemplate(tmpFile, prefix, model)
require.NoError(s.T(), err)
err = tmpFile.Sync()
require.NoError(s.T(), err)
s.T().Cleanup(func() {
os.Remove(tmpFile.Name())
})
return tmpFile.Name()
}
func (s *BaseSuite) getComposeServiceIP(name string) string {
container, ok := s.containers[name]
if !ok {
return ""
}
ip, err := container.ContainerIP(context.Background())
if err != nil {
return ""
}
return ip
}
func withConfigFile(file string) string {
return "--configFile=" + file
}
// setupVPN starts Tailscale on the corresponding container, and makes it a subnet
// router, for all the other containers (whoamis, etc) subsequently started for the
// integration tests.
// It only does so if the file provided as argument exists, and contains a
// Tailscale auth key (an ephemeral, but reusable, one is recommended).
//
// Add this section to your tailscale ACLs to auto-approve the routes for the
// containers in the docker subnet:
//
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// "autoApprovers": {
// // Allow myself to automatically advertize routes for docker networks
// "routes": {
// "172.0.0.0/8": ["your_tailscale_identity"],
// },
// },
func (s *BaseSuite) setupVPN(keyFile string) {
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data, err := os.ReadFile(keyFile)
if err != nil {
if !errors.Is(err, fs.ErrNotExist) {
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log.Error().Err(err).Send()
}
return
}
authKey := strings.TrimSpace(string(data))
// // TODO: copy and create versions that don't need a check.C?
s.createComposeProject("tailscale")
s.composeUp()
time.Sleep(5 * time.Second)
// If we ever change the docker subnet in the Makefile,
// we need to change this one below correspondingly.
s.composeExec("tailscaled", "tailscale", "up", "--authkey="+authKey, "--advertise-routes=172.31.42.0/24")
}
// composeExec runs the command in the given args in the given compose service container.
// Already running services are not affected (i.e. not stopped).
func (s *BaseSuite) composeExec(service string, args ...string) string {
require.Contains(s.T(), s.containers, service)
_, reader, err := s.containers[service].Exec(context.Background(), args)
require.NoError(s.T(), err)
content, err := io.ReadAll(reader)
require.NoError(s.T(), err)
return string(content)
}