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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package e2e
import (
"context"
"encoding/json"
"fmt"
"strings"
"testing"
"time"
corev1 "k8s.io/api/core/v1"
rbacv1 "k8s.io/api/rbac/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/client-go/rest"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/client/config"
"tailscale.com/client/tailscale"
"tailscale.com/tsnet"
"tailscale.com/tstest"
)
// See [TestMain] for test requirements.
func TestProxy(t *testing.T) {
if tsClient == nil {
t.Skip("TestProxy requires credentials for a tailscale client")
}
ctx := context.Background()
cfg := config.GetConfigOrDie()
cl, err := client.New(cfg, client.Options{})
if err != nil {
t.Fatal(err)
}
// Create role and role binding to allow a group we'll impersonate to do stuff.
createAndCleanup(t, ctx, cl, &rbacv1.Role{
ObjectMeta: objectMeta("tailscale", "read-secrets"),
Rules: []rbacv1.PolicyRule{{
APIGroups: []string{""},
Verbs: []string{"get"},
Resources: []string{"secrets"},
}},
})
createAndCleanup(t, ctx, cl, &rbacv1.RoleBinding{
ObjectMeta: objectMeta("tailscale", "read-secrets"),
Subjects: []rbacv1.Subject{{
Kind: "Group",
Name: "ts:e2e-test-proxy",
}},
RoleRef: rbacv1.RoleRef{
Kind: "Role",
Name: "read-secrets",
},
})
// Get operator host name from kube secret.
operatorSecret := corev1.Secret{
ObjectMeta: objectMeta("tailscale", "operator"),
}
if err := get(ctx, cl, &operatorSecret); err != nil {
t.Fatal(err)
}
// Connect to tailnet with test-specific tag so we can use the
// [testGrants] ACLs when connecting to the API server proxy
ts := tsnetServerWithTag(t, ctx, "tag:e2e-test-proxy")
proxyCfg := &rest.Config{
Host: fmt.Sprintf("https://%s:443", hostNameFromOperatorSecret(t, operatorSecret)),
Dial: ts.Dial,
}
proxyCl, err := client.New(proxyCfg, client.Options{})
if err != nil {
t.Fatal(err)
}
// Expect success.
allowedSecret := corev1.Secret{
ObjectMeta: objectMeta("tailscale", "operator"),
}
// Wait for up to a minute the first time we use the proxy, to give it time
// to provision the TLS certs.
if err := tstest.WaitFor(time.Second*60, func() error {
return get(ctx, proxyCl, &allowedSecret)
}); err != nil {
t.Fatal(err)
}
// Expect forbidden.
forbiddenSecret := corev1.Secret{
ObjectMeta: objectMeta("default", "operator"),
}
if err := get(ctx, proxyCl, &forbiddenSecret); err == nil || !apierrors.IsForbidden(err) {
t.Fatalf("expected forbidden error fetching secret from default namespace: %s", err)
}
}
func tsnetServerWithTag(t *testing.T, ctx context.Context, tag string) *tsnet.Server {
caps := tailscale.KeyCapabilities{
Devices: tailscale.KeyDeviceCapabilities{
Create: tailscale.KeyDeviceCreateCapabilities{
Reusable: false,
Preauthorized: true,
Ephemeral: true,
Tags: []string{tag},
},
},
}
authKey, authKeyMeta, err := tsClient.CreateKey(ctx, caps)
if err != nil {
t.Fatal(err)
}
t.Cleanup(func() {
if err := tsClient.DeleteKey(ctx, authKeyMeta.ID); err != nil {
t.Errorf("error deleting auth key: %s", err)
}
})
ts := &tsnet.Server{
Hostname: "test-proxy",
Ephemeral: true,
Dir: t.TempDir(),
AuthKey: authKey,
}
_, err = ts.Up(ctx)
if err != nil {
t.Fatal(err)
}
t.Cleanup(func() {
if err := ts.Close(); err != nil {
t.Errorf("error shutting down tsnet.Server: %s", err)
}
})
return ts
}
func hostNameFromOperatorSecret(t *testing.T, s corev1.Secret) string {
profiles := map[string]any{}
if err := json.Unmarshal(s.Data["_profiles"], &profiles); err != nil {
t.Fatal(err)
}
key, ok := strings.CutPrefix(string(s.Data["_current-profile"]), "profile-")
if !ok {
t.Fatal(string(s.Data["_current-profile"]))
}
profile, ok := profiles[key]
if !ok {
t.Fatal(profiles)
}
return ((profile.(map[string]any))["Name"]).(string)
}
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