headscale/integration_embedded_derp_test.go
Juan Font Alonso 749c92954c Add Tailscale unstable channel and repo HEAD to integration tests
In preparation for the implementation of the new TS2021 protocol (Tailscale control protocol v2) we are expanding the test infrastructure
2022-03-18 17:05:28 +01:00

389 lines
9.3 KiB
Go

//go:build integration
package headscale
import (
"bytes"
"context"
"crypto/tls"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"path"
"strings"
"sync"
"testing"
"time"
v1 "github.com/juanfont/headscale/gen/go/headscale/v1"
"github.com/ory/dockertest/v3"
"github.com/ory/dockertest/v3/docker"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/suite"
"github.com/ccding/go-stun/stun"
)
const (
headscaleHostname = "headscale-derp"
namespaceName = "derpnamespace"
totalContainers = 3
)
type IntegrationDERPTestSuite struct {
suite.Suite
stats *suite.SuiteInformation
pool dockertest.Pool
networks map[int]dockertest.Network // so we keep the containers isolated
headscale dockertest.Resource
tailscales map[string]dockertest.Resource
joinWaitGroup sync.WaitGroup
}
func TestDERPIntegrationTestSuite(t *testing.T) {
s := new(IntegrationDERPTestSuite)
s.tailscales = make(map[string]dockertest.Resource)
s.networks = make(map[int]dockertest.Network)
suite.Run(t, s)
// HandleStats, which allows us to check if we passed and save logs
// is called after TearDown, so we cannot tear down containers before
// we have potentially saved the logs.
for _, tailscale := range s.tailscales {
if err := s.pool.Purge(&tailscale); err != nil {
log.Printf("Could not purge resource: %s\n", err)
}
}
if !s.stats.Passed() {
err := s.saveLog(&s.headscale, "test_output")
if err != nil {
log.Printf("Could not save log: %s\n", err)
}
}
if err := s.pool.Purge(&s.headscale); err != nil {
log.Printf("Could not purge resource: %s\n", err)
}
for _, network := range s.networks {
if err := network.Close(); err != nil {
log.Printf("Could not close network: %s\n", err)
}
}
}
func (s *IntegrationDERPTestSuite) SetupSuite() {
if ppool, err := dockertest.NewPool(""); err == nil {
s.pool = *ppool
} else {
log.Fatalf("Could not connect to docker: %s", err)
}
for i := 0; i < totalContainers; i++ {
if pnetwork, err := s.pool.CreateNetwork(fmt.Sprintf("headscale-derp-%d", i)); err == nil {
s.networks[i] = *pnetwork
} else {
log.Fatalf("Could not create network: %s", err)
}
}
headscaleBuildOptions := &dockertest.BuildOptions{
Dockerfile: "Dockerfile",
ContextDir: ".",
}
currentPath, err := os.Getwd()
if err != nil {
log.Fatalf("Could not determine current path: %s", err)
}
headscaleOptions := &dockertest.RunOptions{
Name: headscaleHostname,
Mounts: []string{
fmt.Sprintf("%s/integration_test/etc_embedded_derp:/etc/headscale", currentPath),
},
Cmd: []string{"headscale", "serve"},
ExposedPorts: []string{"8443/tcp", "3478/udp"},
PortBindings: map[docker.Port][]docker.PortBinding{
"8443/tcp": {{HostPort: "8443"}},
"3478/udp": {{HostPort: "3478"}},
},
}
log.Println("Creating headscale container")
if pheadscale, err := s.pool.BuildAndRunWithBuildOptions(headscaleBuildOptions, headscaleOptions, DockerRestartPolicy); err == nil {
s.headscale = *pheadscale
} else {
log.Fatalf("Could not start resource: %s", err)
}
log.Println("Created headscale container to test DERP")
log.Println("Creating tailscale containers")
for i := 0; i < totalContainers; i++ {
version := tailscaleVersions[i%len(tailscaleVersions)]
hostname, container := s.tailscaleContainer(
fmt.Sprint(i),
version,
s.networks[i],
)
s.tailscales[hostname] = *container
}
log.Println("Waiting for headscale to be ready")
hostEndpoint := fmt.Sprintf("localhost:%s", s.headscale.GetPort("8443/tcp"))
if err := s.pool.Retry(func() error {
url := fmt.Sprintf("https://%s/health", hostEndpoint)
insecureTransport := http.DefaultTransport.(*http.Transport).Clone()
insecureTransport.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
client := &http.Client{Transport: insecureTransport}
resp, err := client.Get(url)
if err != nil {
return err
}
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("status code not OK")
}
return nil
}); err != nil {
// TODO(kradalby): If we cannot access headscale, or any other fatal error during
// test setup, we need to abort and tear down. However, testify does not seem to
// support that at the moment:
// https://github.com/stretchr/testify/issues/849
return // fmt.Errorf("Could not connect to headscale: %s", err)
}
log.Println("headscale container is ready")
log.Printf("Creating headscale namespace: %s\n", namespaceName)
result, err := ExecuteCommand(
&s.headscale,
[]string{"headscale", "namespaces", "create", namespaceName},
[]string{},
)
log.Println("headscale create namespace result: ", result)
assert.Nil(s.T(), err)
log.Printf("Creating pre auth key for %s\n", namespaceName)
preAuthResult, err := ExecuteCommand(
&s.headscale,
[]string{
"headscale",
"--namespace",
namespaceName,
"preauthkeys",
"create",
"--reusable",
"--expiration",
"24h",
"--output",
"json",
},
[]string{"LOG_LEVEL=error"},
)
assert.Nil(s.T(), err)
var preAuthKey v1.PreAuthKey
err = json.Unmarshal([]byte(preAuthResult), &preAuthKey)
assert.Nil(s.T(), err)
assert.True(s.T(), preAuthKey.Reusable)
headscaleEndpoint := fmt.Sprintf("https://headscale:%s", s.headscale.GetPort("8443/tcp"))
log.Printf(
"Joining tailscale containers to headscale at %s\n",
headscaleEndpoint,
)
for hostname, tailscale := range s.tailscales {
s.joinWaitGroup.Add(1)
go s.Join(headscaleEndpoint, preAuthKey.Key, hostname, tailscale)
}
s.joinWaitGroup.Wait()
// The nodes need a bit of time to get their updated maps from headscale
// TODO: See if we can have a more deterministic wait here.
time.Sleep(60 * time.Second)
}
func (s *IntegrationDERPTestSuite) Join(
endpoint, key, hostname string,
tailscale dockertest.Resource,
) {
defer s.joinWaitGroup.Done()
command := []string{
"tailscale",
"up",
"-login-server",
endpoint,
"--authkey",
key,
"--hostname",
hostname,
}
log.Println("Join command:", command)
log.Printf("Running join command for %s\n", hostname)
_, err := ExecuteCommand(
&tailscale,
command,
[]string{},
)
assert.Nil(s.T(), err)
log.Printf("%s joined\n", hostname)
}
func (s *IntegrationDERPTestSuite) tailscaleContainer(identifier, version string, network dockertest.Network,
) (string, *dockertest.Resource) {
tailscaleBuildOptions := getDockerBuildOptions(version)
hostname := fmt.Sprintf(
"tailscale-%s-%s",
strings.Replace(version, ".", "-", -1),
identifier,
)
tailscaleOptions := &dockertest.RunOptions{
Name: hostname,
Networks: []*dockertest.Network{&network},
Cmd: []string{
"tailscaled", "--tun=tsdev",
},
// expose the host IP address, so we can access it from inside the container
ExtraHosts: []string{"host.docker.internal:host-gateway", "headscale:host-gateway"},
}
pts, err := s.pool.BuildAndRunWithBuildOptions(
tailscaleBuildOptions,
tailscaleOptions,
DockerRestartPolicy,
DockerAllowLocalIPv6,
DockerAllowNetworkAdministration,
)
if err != nil {
log.Fatalf("Could not start resource: %s", err)
}
log.Printf("Created %s container\n", hostname)
return hostname, pts
}
func (s *IntegrationDERPTestSuite) TearDownSuite() {
}
func (s *IntegrationDERPTestSuite) HandleStats(
suiteName string,
stats *suite.SuiteInformation,
) {
s.stats = stats
}
func (s *IntegrationDERPTestSuite) saveLog(
resource *dockertest.Resource,
basePath string,
) error {
err := os.MkdirAll(basePath, os.ModePerm)
if err != nil {
return err
}
var stdout bytes.Buffer
var stderr bytes.Buffer
err = s.pool.Client.Logs(
docker.LogsOptions{
Context: context.TODO(),
Container: resource.Container.ID,
OutputStream: &stdout,
ErrorStream: &stderr,
Tail: "all",
RawTerminal: false,
Stdout: true,
Stderr: true,
Follow: false,
Timestamps: false,
},
)
if err != nil {
return err
}
log.Printf("Saving logs for %s to %s\n", resource.Container.Name, basePath)
err = ioutil.WriteFile(
path.Join(basePath, resource.Container.Name+".stdout.log"),
[]byte(stdout.String()),
0o644,
)
if err != nil {
return err
}
err = ioutil.WriteFile(
path.Join(basePath, resource.Container.Name+".stderr.log"),
[]byte(stdout.String()),
0o644,
)
if err != nil {
return err
}
return nil
}
func (s *IntegrationDERPTestSuite) TestPingAllPeersByHostname() {
ips, err := getIPs(s.tailscales)
assert.Nil(s.T(), err)
for hostname, tailscale := range s.tailscales {
for peername := range ips {
if peername == hostname {
continue
}
s.T().Run(fmt.Sprintf("%s-%s", hostname, peername), func(t *testing.T) {
command := []string{
"tailscale", "ping",
"--timeout=10s",
"--c=5",
"--until-direct=false",
peername,
}
log.Printf(
"Pinging using hostname from %s to %s\n",
hostname,
peername,
)
log.Println(command)
result, err := ExecuteCommand(
&tailscale,
command,
[]string{},
)
assert.Nil(t, err)
log.Printf("Result for %s: %s\n", hostname, result)
assert.Contains(t, result, "via DERP(headscale)")
})
}
}
}
func (s *IntegrationDERPTestSuite) TestDERPSTUN() {
headscaleSTUNAddr := fmt.Sprintf("localhost:%s", s.headscale.GetPort("3478/udp"))
client := stun.NewClient()
client.SetVerbose(true)
client.SetVVerbose(true)
client.SetServerAddr(headscaleSTUNAddr)
_, _, err := client.Discover()
assert.Nil(s.T(), err)
}