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Merge pull request #121 from juanfont/main

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New integration test for tailscale 1.14
This commit is contained in:
Kristoffer Dalby 2021-09-23 14:51:26 +01:00 committed by GitHub
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5 changed files with 368 additions and 196 deletions
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1
.github/workflows/release.yml vendored
View File

@ -49,6 +49,7 @@ jobs:
${{ secrets.DOCKERHUB_USERNAME }}/headscale
ghcr.io/${{ github.repository_owner }}/headscale
tags: |
type=semver,pattern={{version}}
type=semver,pattern={{major}}.{{minor}}
type=semver,pattern={{major}}
type=sha

2
Dockerfile
View File

@ -1,4 +1,4 @@
FROM golang:latest AS build
FROM golang:1.17.1-bullseye AS build
ENV GOPATH /go
COPY go.mod go.sum /go/src/headscale/

4
Dockerfile.tailscale
View File

@ -1,9 +1,11 @@
FROM ubuntu:latest
ARG TAILSCALE_VERSION
RUN apt-get update \
&& apt-get install -y gnupg curl \
&& curl -fsSL https://pkgs.tailscale.com/stable/ubuntu/focal.gpg | apt-key add - \
&& curl -fsSL https://pkgs.tailscale.com/stable/ubuntu/focal.list | tee /etc/apt/sources.list.d/tailscale.list \
&& apt-get update \
&& apt-get install -y tailscale \
&& apt-get install -y tailscale=${TAILSCALE_VERSION} \
&& rm -rf /var/lib/apt/lists/*

135
README.md
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@ -18,7 +18,7 @@ Headscale implements this coordination server.
- [x] Base functionality (nodes can communicate with each other)
- [x] Node registration through the web flow
- [x] Network changes are relied to the nodes
- [x] Network changes are relayed to the nodes
- [x] Namespace support (~equivalent to multi-user in Tailscale.com)
- [x] Routing (advertise & accept, including exit nodes)
- [x] Node registration via pre-auth keys (including reusable keys, and ephemeral node support)
@ -40,74 +40,87 @@ Suggestions/PRs welcomed!
1. Download the Headscale binary https://github.com/juanfont/headscale/releases, and place it somewhere in your PATH or use the docker container
```shell
docker pull headscale/headscale:x.x.x
```
<!--
or
```shell
docker pull ghrc.io/juanfont/headscale:x.x.x
``` -->
```shell
docker pull headscale/headscale:x.x.x
```
<!--
or
```shell
docker pull ghrc.io/juanfont/headscale:x.x.x
``` -->
2. (Optional, you can also use SQLite) Get yourself a PostgreSQL DB running
```shell
docker run --name headscale -e POSTGRES_DB=headscale -e \
POSTGRES_USER=foo -e POSTGRES_PASSWORD=bar -p 5432:5432 -d postgres
```
```shell
docker run --name headscale -e POSTGRES_DB=headscale -e \
POSTGRES_USER=foo -e POSTGRES_PASSWORD=bar -p 5432:5432 -d postgres
```
3. Set some stuff up (headscale Wireguard keys & the config.json file)
```shell
wg genkey > private.key
wg pubkey < private.key > public.key # not needed
```shell
wg genkey > private.key
wg pubkey < private.key > public.key # not needed
# Postgres
cp config.json.postgres.example config.json
# or
# SQLite
cp config.json.sqlite.example config.json
```
# Postgres
cp config.json.postgres.example config.json
# or
# SQLite
cp config.json.sqlite.example config.json
```
4. Create a namespace (a namespace is a 'tailnet', a group of Tailscale nodes that can talk to each other)
```shell
headscale namespaces create myfirstnamespace
```
or docker:
```shell
docker run -v ./private.key:/private.key -v ./config.json:/config.json headscale/headscale:x.x.x headscale namespace create myfirstnamespace
```
```shell
headscale namespaces create myfirstnamespace
```
or docker:
the db.sqlite mount is only needed if you use sqlite
```shell
touch db.sqlite
docker run -v $(pwd)/private.key:/private.key -v $(pwd)/config.json:/config.json -v $(pwd)/derp.yaml:/derp.yaml -v $(pwd)/db.sqlite:/db.sqlite -p 127.0.0.1:8000:8000 headscale/headscale:x.x.x headscale namespaces create myfirstnamespace
```
or if your server is already running in docker:
```shell
docker exec <container_name> headscale create myfirstnamespace
```
5. Run the server
```shell
headscale serve
```
or docker:
```shell
docker run -v $(pwd)/private.key:/private.key -v $(pwd)/config.json:/config.json -v $(pwd)/derb.yaml:/derb.yaml -p 127.0.0.1:8080:8080 headscale/headscale:x.x.x headscale serve
```
```shell
headscale serve
```
or docker:
6. If you used tailscale.com before in your nodes, make sure you clear the tailscaled data folder
```shell
systemctl stop tailscaled
rm -fr /var/lib/tailscale
systemctl start tailscaled
```
the db.sqlite mount is only needed if you use sqlite
```shell
docker run -v $(pwd)/private.key:/private.key -v $(pwd)/config.json:/config.json -v $(pwd)/derp.yaml:/derp.yaml -v $(pwd)/db.sqlite:/db.sqlite -p 127.0.0.1:8000:8000 headscale/headscale:x.x.x headscale serve
```
6. If you used tailscale.com before in your nodes, make sure you clear the tailscald data folder
```shell
systemctl stop tailscaled
rm -fr /var/lib/tailscale
systemctl start tailscaled
```
7. Add your first machine
```shell
tailscale up -login-server YOUR_HEADSCALE_URL
```
```shell
tailscale up -login-server YOUR_HEADSCALE_URL
```
8. Navigate to the URL you will get with `tailscale up`, where you'll find your machine key.
9. In the server, register your machine to a namespace with the CLI
```shell
headscale -n myfirstnamespace node register YOURMACHINEKEY
```
or docker:
```shell
docker run -v ./private.key:/private.key -v ./config.json:/config.json headscale/headscale:x.x.x headscale -n myfirstnamespace node register YOURMACHINEKEY
```
```shell
headscale -n myfirstnamespace node register YOURMACHINEKEY
```
or docker:
```shell
docker run -v $(pwd)/private.key:/private.key -v $(pwd)/config.json:/config.json -v $(pwd)/derp.yaml:/derp.yaml headscale/headscale:x.x.x headscale -n myfirstnamespace node register YOURMACHINEKEY
```
or if your server is already running in docker:
```shell
docker exec <container_name> headscale -n myfistnamespace node register YOURMACHINEKEY
```
Alternatively, you can use Auth Keys to register your machines:
@ -115,15 +128,19 @@ Alternatively, you can use Auth Keys to register your machines:
```shell
headscale -n myfirstnamespace preauthkeys create --reusable --expiration 24h
```
or docker:
```shell
docker run -v ./private.key:/private.key -v ./config.json:/config.json headscale/headscale:x.x.x headscale -n myfirstnamespace preauthkeys create --reusable --expiration 24h
```
or docker:
```shell
docker run -v $(pwd)/private.key:/private.key -v $(pwd)/config.json:/config.json -v$(pwd)/derp.yaml:/derp.yaml -v $(pwd)/db.sqlite:/db.sqlite headscale/headscale:x.x.x headscale -n myfirstnamespace preauthkeys create --reusable --expiration 24h
```
or if your server is already running in docker:
```shell
docker exec <container_name> headscale -n myfirstnamespace preauthkeys create --reusable --expiration 24h
```
2. Use the authkey from your machine to register it
```shell
tailscale up -login-server YOUR_HEADSCALE_URL --authkey YOURAUTHKEY
```
```shell
tailscale up -login-server YOUR_HEADSCALE_URL --authkey YOURAUTHKEY
```
If you create an authkey with the `--ephemeral` flag, that key will create ephemeral nodes. This implies that `--reusable` is true.

418
integration_test.go
View File

@ -1,3 +1,4 @@
//go:build integration
// +build integration
package headscale
@ -5,6 +6,7 @@ package headscale
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io/ioutil"
"log"
@ -19,34 +21,60 @@ import (
"github.com/ory/dockertest/v3/docker"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/suite"
"tailscale.com/ipn/ipnstate"
"inet.af/netaddr"
)
var integrationTmpDir string
var ih Headscale
var (
integrationTmpDir string
ih Headscale
)
var pool dockertest.Pool
var network dockertest.Network
var headscale dockertest.Resource
var tailscaleCount int = 25
var tailscales map[string]dockertest.Resource
var (
pool dockertest.Pool
network dockertest.Network
headscale dockertest.Resource
)
var tailscaleVersions = []string{"1.14.3", "1.12.3"}
type TestNamespace struct {
count int
tailscales map[string]dockertest.Resource
}
type IntegrationTestSuite struct {
suite.Suite
stats *suite.SuiteInformation
namespaces map[string]TestNamespace
}
func TestIntegrationTestSuite(t *testing.T) {
s := new(IntegrationTestSuite)
s.namespaces = map[string]TestNamespace{
"main": {
count: 20,
tailscales: make(map[string]dockertest.Resource),
},
"shared": {
count: 5,
tailscales: make(map[string]dockertest.Resource),
},
}
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 tailscales {
if err := pool.Purge(&tailscale); err != nil {
log.Printf("Could not purge resource: %s\n", err)
for _, scales := range s.namespaces {
for _, tailscale := range scales.tailscales {
if err := pool.Purge(&tailscale); err != nil {
log.Printf("Could not purge resource: %s\n", err)
}
}
}
@ -119,12 +147,12 @@ func saveLog(resource *dockertest.Resource, basePath string) error {
fmt.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()), 0644)
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()), 0644)
err = ioutil.WriteFile(path.Join(basePath, resource.Container.Name+".stderr.log"), []byte(stdout.String()), 0o644)
if err != nil {
return err
}
@ -140,6 +168,32 @@ func dockerRestartPolicy(config *docker.HostConfig) {
}
}
func tailscaleContainer(namespace, identifier, version string) (string, *dockertest.Resource) {
tailscaleBuildOptions := &dockertest.BuildOptions{
Dockerfile: "Dockerfile.tailscale",
ContextDir: ".",
BuildArgs: []docker.BuildArg{
{
Name: "TAILSCALE_VERSION",
Value: version,
},
},
}
hostname := fmt.Sprintf("%s-tailscale-%s-%s", namespace, strings.Replace(version, ".", "-", -1), identifier)
tailscaleOptions := &dockertest.RunOptions{
Name: hostname,
Networks: []*dockertest.Network{&network},
Cmd: []string{"tailscaled", "--tun=userspace-networking", "--socks5-server=localhost:1055"},
}
pts, err := pool.BuildAndRunWithBuildOptions(tailscaleBuildOptions, tailscaleOptions, dockerRestartPolicy)
if err != nil {
log.Fatalf("Could not start resource: %s", err)
}
fmt.Printf("Created %s container\n", hostname)
return hostname, pts
}
func (s *IntegrationTestSuite) SetupSuite() {
var err error
h = Headscale{
@ -164,11 +218,6 @@ func (s *IntegrationTestSuite) SetupSuite() {
ContextDir: ".",
}
tailscaleBuildOptions := &dockertest.BuildOptions{
Dockerfile: "Dockerfile.tailscale",
ContextDir: ".",
}
currentPath, err := os.Getwd()
if err != nil {
log.Fatalf("Could not determine current path: %s", err)
@ -183,7 +232,7 @@ func (s *IntegrationTestSuite) SetupSuite() {
Networks: []*dockertest.Network{&network},
Cmd: []string{"headscale", "serve"},
PortBindings: map[docker.Port][]docker.PortBinding{
"8080/tcp": []docker.PortBinding{{HostPort: "8080"}},
"8080/tcp": {{HostPort: "8080"}},
},
}
@ -196,21 +245,13 @@ func (s *IntegrationTestSuite) SetupSuite() {
fmt.Println("Created headscale container")
fmt.Println("Creating tailscale containers")
tailscales = make(map[string]dockertest.Resource)
for i := 0; i < tailscaleCount; i++ {
hostname := fmt.Sprintf("tailscale%d", i)
tailscaleOptions := &dockertest.RunOptions{
Name: hostname,
Networks: []*dockertest.Network{&network},
Cmd: []string{"tailscaled", "--tun=userspace-networking", "--socks5-server=localhost:1055"},
}
for namespace, scales := range s.namespaces {
for i := 0; i < scales.count; i++ {
version := tailscaleVersions[i%len(tailscaleVersions)]
if pts, err := pool.BuildAndRunWithBuildOptions(tailscaleBuildOptions, tailscaleOptions, dockerRestartPolicy); err == nil {
tailscales[hostname] = *pts
} else {
log.Fatalf("Could not start resource: %s", err)
hostname, container := tailscaleContainer(namespace, fmt.Sprint(i), version)
scales.tailscales[hostname] = *container
}
fmt.Printf("Created %s container\n", hostname)
}
fmt.Println("Waiting for headscale to be ready")
@ -231,35 +272,38 @@ func (s *IntegrationTestSuite) SetupSuite() {
}
fmt.Println("headscale container is ready")
fmt.Println("Creating headscale namespace")
result, err := executeCommand(
&headscale,
[]string{"headscale", "namespaces", "create", "test"},
)
assert.Nil(s.T(), err)
fmt.Println("Creating pre auth key")
authKey, err := executeCommand(
&headscale,
[]string{"headscale", "-n", "test", "preauthkeys", "create", "--reusable", "--expiration", "24h"},
)
assert.Nil(s.T(), err)
headscaleEndpoint := fmt.Sprintf("http://headscale:%s", headscale.GetPort("8080/tcp"))
fmt.Printf("Joining tailscale containers to headscale at %s\n", headscaleEndpoint)
for hostname, tailscale := range tailscales {
command := []string{"tailscale", "up", "-login-server", headscaleEndpoint, "--authkey", strings.TrimSuffix(authKey, "\n"), "--hostname", hostname}
fmt.Println("Join command:", command)
fmt.Printf("Running join command for %s\n", hostname)
result, err = executeCommand(
&tailscale,
command,
for namespace, scales := range s.namespaces {
fmt.Printf("Creating headscale namespace: %s\n", namespace)
result, err := executeCommand(
&headscale,
[]string{"headscale", "namespaces", "create", namespace},
)
fmt.Println("tailscale result: ", result)
assert.Nil(s.T(), err)
fmt.Printf("%s joined\n", hostname)
fmt.Println("headscale create namespace result: ", result)
fmt.Printf("Creating pre auth key for %s\n", namespace)
authKey, err := executeCommand(
&headscale,
[]string{"headscale", "--namespace", namespace, "preauthkeys", "create", "--reusable", "--expiration", "24h"},
)
assert.Nil(s.T(), err)
headscaleEndpoint := fmt.Sprintf("http://headscale:%s", headscale.GetPort("8080/tcp"))
fmt.Printf("Joining tailscale containers to headscale at %s\n", headscaleEndpoint)
for hostname, tailscale := range scales.tailscales {
command := []string{"tailscale", "up", "-login-server", headscaleEndpoint, "--authkey", strings.TrimSuffix(authKey, "\n"), "--hostname", hostname}
fmt.Println("Join command:", command)
fmt.Printf("Running join command for %s\n", hostname)
result, err := executeCommand(
&tailscale,
command,
)
fmt.Println("tailscale result: ", result)
assert.Nil(s.T(), err)
fmt.Printf("%s joined\n", hostname)
}
}
// The nodes need a bit of time to get their updated maps from headscale
@ -275,109 +319,217 @@ func (s *IntegrationTestSuite) HandleStats(suiteName string, stats *suite.SuiteI
}
func (s *IntegrationTestSuite) TestListNodes() {
fmt.Println("Listing nodes")
result, err := executeCommand(
&headscale,
[]string{"headscale", "-n", "test", "nodes", "list"},
)
assert.Nil(s.T(), err)
for namespace, scales := range s.namespaces {
fmt.Println("Listing nodes")
result, err := executeCommand(
&headscale,
[]string{"headscale", "--namespace", namespace, "nodes", "list"},
)
assert.Nil(s.T(), err)
fmt.Printf("List nodes: \n%s\n", result)
fmt.Printf("List nodes: \n%s\n", result)
// Chck that the correct count of host is present in node list
lines := strings.Split(result, "\n")
assert.Equal(s.T(), len(tailscales), len(lines)-2)
// Chck that the correct count of host is present in node list
lines := strings.Split(result, "\n")
assert.Equal(s.T(), len(scales.tailscales), len(lines)-2)
for hostname, _ := range tailscales {
assert.Contains(s.T(), result, hostname)
for hostname := range scales.tailscales {
assert.Contains(s.T(), result, hostname)
}
}
}
func (s *IntegrationTestSuite) TestGetIpAddresses() {
ipPrefix := netaddr.MustParseIPPrefix("100.64.0.0/10")
ips, err := getIPs()
assert.Nil(s.T(), err)
for _, scales := range s.namespaces {
ipPrefix := netaddr.MustParseIPPrefix("100.64.0.0/10")
ips, err := getIPs(scales.tailscales)
assert.Nil(s.T(), err)
for hostname, _ := range tailscales {
s.T().Run(hostname, func(t *testing.T) {
ip := ips[hostname]
for hostname := range scales.tailscales {
s.T().Run(hostname, func(t *testing.T) {
ip := ips[hostname]
fmt.Printf("IP for %s: %s\n", hostname, ip)
fmt.Printf("IP for %s: %s\n", hostname, ip)
// c.Assert(ip.Valid(), check.IsTrue)
assert.True(t, ip.Is4())
assert.True(t, ipPrefix.Contains(ip))
// c.Assert(ip.Valid(), check.IsTrue)
assert.True(t, ip.Is4())
assert.True(t, ipPrefix.Contains(ip))
ips[hostname] = ip
})
ips[hostname] = ip
})
}
}
}
func (s *IntegrationTestSuite) TestStatus() {
ips, err := getIPs()
assert.Nil(s.T(), err)
for _, scales := range s.namespaces {
ips, err := getIPs(scales.tailscales)
assert.Nil(s.T(), err)
for hostname, tailscale := range tailscales {
s.T().Run(hostname, func(t *testing.T) {
command := []string{"tailscale", "status"}
for hostname, tailscale := range scales.tailscales {
s.T().Run(hostname, func(t *testing.T) {
command := []string{"tailscale", "status", "--json"}
fmt.Printf("Getting status for %s\n", hostname)
result, err := executeCommand(
&tailscale,
command,
)
assert.Nil(t, err)
// fmt.Printf("Status for %s: %s", hostname, result)
fmt.Printf("Getting status for %s\n", hostname)
result, err := executeCommand(
&tailscale,
command,
)
assert.Nil(t, err)
// Check if we have as many nodes in status
// as we have IPs/tailscales
lines := strings.Split(result, "\n")
assert.Equal(t, len(ips), len(lines)-1)
assert.Equal(t, len(tailscales), len(lines)-1)
var status ipnstate.Status
err = json.Unmarshal([]byte(result), &status)
assert.Nil(s.T(), err)
// Check that all hosts is present in all hosts status
for ipHostname, ip := range ips {
assert.Contains(t, result, ip.String())
assert.Contains(t, result, ipHostname)
}
})
}
}
// TODO(kradalby): Replace this check with peer length of SAME namespace
// Check if we have as many nodes in status
// as we have IPs/tailscales
// lines := strings.Split(result, "\n")
// assert.Equal(t, len(ips), len(lines)-1)
// assert.Equal(t, len(scales.tailscales), len(lines)-1)
func (s *IntegrationTestSuite) TestPingAllPeers() {
ips, err := getIPs()
assert.Nil(s.T(), err)
peerIps := getIPsfromIPNstate(status)
for hostname, tailscale := range tailscales {
for peername, ip := range ips {
s.T().Run(fmt.Sprintf("%s-%s", hostname, peername), func(t *testing.T) {
// We currently cant ping ourselves, so skip that.
if peername != hostname {
// We are only interested in "direct ping" which means what we
// might need a couple of more attempts before reaching the node.
command := []string{
"tailscale", "ping",
"--timeout=1s",
"--c=20",
"--until-direct=true",
ip.String(),
// Check that all hosts is present in all hosts status
for ipHostname, ip := range ips {
if hostname != ipHostname {
assert.Contains(t, peerIps, ip)
}
fmt.Printf("Pinging from %s (%s) to %s (%s)\n", hostname, ips[hostname], peername, ip)
result, err := executeCommand(
&tailscale,
command,
)
assert.Nil(t, err)
fmt.Printf("Result for %s: %s\n", hostname, result)
assert.Contains(t, result, "pong")
}
})
}
}
}
func getIPs() (map[string]netaddr.IP, error) {
func getIPsfromIPNstate(status ipnstate.Status) []netaddr.IP {
ips := make([]netaddr.IP, 0)
for _, peer := range status.Peer {
ips = append(ips, peer.TailscaleIPs...)
}
return ips
}
func (s *IntegrationTestSuite) TestPingAllPeers() {
for _, scales := range s.namespaces {
ips, err := getIPs(scales.tailscales)
assert.Nil(s.T(), err)
for hostname, tailscale := range scales.tailscales {
for peername, ip := range ips {
s.T().Run(fmt.Sprintf("%s-%s", hostname, peername), func(t *testing.T) {
// We currently cant ping ourselves, so skip that.
if peername != hostname {
// We are only interested in "direct ping" which means what we
// might need a couple of more attempts before reaching the node.
command := []string{
"tailscale", "ping",
"--timeout=1s",
"--c=20",
"--until-direct=true",
ip.String(),
}
fmt.Printf("Pinging from %s (%s) to %s (%s)\n", hostname, ips[hostname], peername, ip)
result, err := executeCommand(
&tailscale,
command,
)
assert.Nil(t, err)
fmt.Printf("Result for %s: %s\n", hostname, result)
assert.Contains(t, result, "pong")
}
})
}
}
}
}
func (s *IntegrationTestSuite) TestSharedNodes() {
main := s.namespaces["main"]
shared := s.namespaces["shared"]
result, err := executeCommand(
&headscale,
[]string{"headscale", "nodes", "list", "-o", "json", "--namespace", "shared"},
)
assert.Nil(s.T(), err)
var machineList []Machine
err = json.Unmarshal([]byte(result), &machineList)
assert.Nil(s.T(), err)
for _, machine := range machineList {
result, err := executeCommand(
&headscale,
[]string{"headscale", "nodes", "share", "--namespace", "shared", fmt.Sprint(machine.ID), "main"},
)
assert.Nil(s.T(), err)
fmt.Println("Shared node with result: ", result)
}
result, err = executeCommand(
&headscale,
[]string{"headscale", "nodes", "list", "--namespace", "main"},
)
assert.Nil(s.T(), err)
fmt.Println("Nodelist after sharing", result)
// Chck that the correct count of host is present in node list
lines := strings.Split(result, "\n")
assert.Equal(s.T(), len(main.tailscales)+len(shared.tailscales), len(lines)-2)
for hostname := range main.tailscales {
assert.Contains(s.T(), result, hostname)
}
for hostname := range shared.tailscales {
assert.Contains(s.T(), result, hostname)
}
// TODO(kradalby): Figure out why these connections are not set up
// // TODO: See if we can have a more deterministic wait here.
// time.Sleep(100 * time.Second)
// mainIps, err := getIPs(main.tailscales)
// assert.Nil(s.T(), err)
// sharedIps, err := getIPs(shared.tailscales)
// assert.Nil(s.T(), err)
// for hostname, tailscale := range main.tailscales {
// for peername, ip := range sharedIps {
// s.T().Run(fmt.Sprintf("%s-%s", hostname, peername), func(t *testing.T) {
// // We currently cant ping ourselves, so skip that.
// if peername != hostname {
// // We are only interested in "direct ping" which means what we
// // might need a couple of more attempts before reaching the node.
// command := []string{
// "tailscale", "ping",
// "--timeout=1s",
// "--c=20",
// "--until-direct=true",
// ip.String(),
// }
// fmt.Printf("Pinging from %s (%s) to %s (%s)\n", hostname, mainIps[hostname], peername, ip)
// result, err := executeCommand(
// &tailscale,
// command,
// )
// assert.Nil(t, err)
// fmt.Printf("Result for %s: %s\n", hostname, result)
// assert.Contains(t, result, "pong")
// }
// })
// }
// }
}
func getIPs(tailscales map[string]dockertest.Resource) (map[string]netaddr.IP, error) {
ips := make(map[string]netaddr.IP)
for hostname, tailscale := range tailscales {
command := []string{"tailscale", "ip"}