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// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
package e2e
import (
"encoding/json"
"fmt"
"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"
"tailscale.com/ipn"
"tailscale.com/tstest"
)
// See [TestMain] for test requirements.
func TestProxy(t *testing.T) {
if tnClient == nil {
t.Skip("TestProxy requires a working tailnet client")
}
// Create role and role binding to allow a group we'll impersonate to do stuff.
createAndCleanup(t, kubeClient, &rbacv1.Role{
ObjectMeta: objectMeta("tailscale", "read-secrets"),
Rules: []rbacv1.PolicyRule{{
APIGroups: []string{""},
Verbs: []string{"get"},
Resources: []string{"secrets"},
}},
})
createAndCleanup(t, kubeClient, &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(t.Context(), kubeClient, &operatorSecret); err != nil {
t.Fatal(err)
}
// Join tailnet as a client of the API server proxy.
proxyCfg := &rest.Config{
Host: fmt.Sprintf("https://%s:443", hostNameFromOperatorSecret(t, operatorSecret)),
}
proxyCl, err := client.New(proxyCfg, client.Options{
HTTPClient: newHTTPClient(tnClient),
})
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.Minute, func() error {
err := get(t.Context(), proxyCl, &allowedSecret)
t.Logf("get Secret via proxy: %v", err)
return err
}); err != nil {
t.Fatal(err)
}
// Expect forbidden.
forbiddenSecret := corev1.Secret{
ObjectMeta: objectMeta("default", "operator"),
}
if err := get(t.Context(), proxyCl, &forbiddenSecret); err == nil || !apierrors.IsForbidden(err) {
t.Fatalf("expected forbidden error fetching secret from default namespace: %s", err)
}
}
func hostNameFromOperatorSecret(t *testing.T, s corev1.Secret) string {
t.Helper()
prefsBytes, ok := s.Data[string(s.Data["_current-profile"])]
if !ok {
t.Fatalf("no state in operator Secret data: %#v", s.Data)
}
prefs := ipn.Prefs{}
if err := json.Unmarshal(prefsBytes, &prefs); err != nil {
t.Fatal(err)
}
if prefs.Persist == nil {
t.Fatalf("no hostname in operator Secret data: %#v", s.Data)
}
return prefs.Persist.UserProfile.LoginName
}
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