ctl: fix https client panic (#8239)

tools/pd-ctl/pdctl/command/global.go

@@ -55,23 +55,15 @@ var PDCli pd.Client
 
 func requirePDClient(cmd *cobra.Command, _ []string) error {
 	var (
-		caPath string
-		err    error
+		tlsConfig *tls.Config
+		err       error
 	)
-	caPath, err = cmd.Flags().GetString("cacert")
-	if err == nil && len(caPath) != 0 {
-		var certPath, keyPath string
-		certPath, err = cmd.Flags().GetString("cert")
-		if err != nil {
-			return err
-		}
-		keyPath, err = cmd.Flags().GetString("key")
-		if err != nil {
-			return err
-		}
-		return initNewPDClientWithTLS(cmd, caPath, certPath, keyPath)
+	tlsConfig, err = parseTLSConfig(cmd)
+	if err != nil {
+		return err
 	}
-	return initNewPDClient(cmd)
+
+	return initNewPDClient(cmd, pd.WithTLSConfig(tlsConfig))
 }
 
 // shouldInitPDClient checks whether we should create a new PD client according to the cluster information.
@@ -111,44 +103,36 @@ func initNewPDClient(cmd *cobra.Command, opts ...pd.ClientOption) error {
 	return nil
 }
 
-func initNewPDClientWithTLS(cmd *cobra.Command, caPath, certPath, keyPath string) error {
-	tlsConfig, err := initTLSConfig(caPath, certPath, keyPath)
-	if err != nil {
-		return err
-	}
-	initNewPDClient(cmd, pd.WithTLSConfig(tlsConfig))
-	return nil
-}
-
 // TODO: replace dialClient with the PD HTTP client completely.
 var dialClient = &http.Client{
 	Transport: apiutil.NewCallerIDRoundTripper(http.DefaultTransport, pdControlCallerID),
 }
 
-// RequireHTTPSClient creates a HTTPS client if the related flags are set
-func RequireHTTPSClient(cmd *cobra.Command, args []string) error {
+func parseTLSConfig(cmd *cobra.Command) (*tls.Config, error) {
 	caPath, err := cmd.Flags().GetString("cacert")
-	if err == nil && len(caPath) != 0 {
-		certPath, err := cmd.Flags().GetString("cert")
-		if err != nil {
-			return err
-		}
-		keyPath, err := cmd.Flags().GetString("key")
-		if err != nil {
-			return err
-		}
-		err = initHTTPSClient(caPath, certPath, keyPath)
-		if err != nil {
-			cmd.Println(err)
-			return err
-		}
+	if err != nil || len(caPath) == 0 {
+		return nil, err
+	}
+	certPath, err := cmd.Flags().GetString("cert")
+	if err != nil {
+		return nil, err
+	}
+	keyPath, err := cmd.Flags().GetString("key")
+	if err != nil {
+		return nil, err
 	}
-	return nil
-}
-
-func initHTTPSClient(caPath, certPath, keyPath string) error {
 	tlsConfig, err := initTLSConfig(caPath, certPath, keyPath)
 	if err != nil {
+		return nil, err
+	}
+
+	return tlsConfig, nil
+}
+
+// RequireHTTPSClient creates a HTTPS client if the related flags are set
+func RequireHTTPSClient(cmd *cobra.Command, _ []string) error {
+	tlsConfig, err := parseTLSConfig(cmd)
+	if err != nil || tlsConfig == nil {
 		return err
 	}
 	dialClient = &http.Client{

tools/pd-ctl/pdctl/command/global_test.go

@@ -0,0 +1,58 @@
+// Copyright 2024 TiKV Project Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package command
+
+import (
+	"os"
+	"os/exec"
+	"testing"
+
+	"github.com/spf13/cobra"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseTLSConfig(t *testing.T) {
+	re := require.New(t)
+
+	rootCmd := &cobra.Command{
+		Use:           "pd-ctl",
+		Short:         "Placement Driver control",
+		SilenceErrors: true,
+	}
+	certPath := "../../tests/cert"
+	rootCmd.Flags().String("cacert", certPath+"/ca.pem", "path of file that contains list of trusted SSL CAs")
+	rootCmd.Flags().String("cert", certPath+"/client.pem", "path of file that contains X509 certificate in PEM format")
+	rootCmd.Flags().String("key", certPath+"/client-key.pem", "path of file that contains X509 key in PEM format")
+
+	// generate certs
+	if err := os.Mkdir(certPath, 0755); err != nil {
+		t.Fatal(err)
+	}
+	certScript := "../../tests/cert_opt.sh"
+	if err := exec.Command(certScript, "generate", certPath).Run(); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := exec.Command(certScript, "cleanup", certPath).Run(); err != nil {
+			t.Fatal(err)
+		}
+		if err := os.RemoveAll(certPath); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	tlsConfig, err := parseTLSConfig(rootCmd)
+	re.NoError(err)
+	re.NotNil(tlsConfig)
+}

tools/pd-ctl/pdctl/ctl.go

@@ -30,6 +30,7 @@ import (
 
 func init() {
 	cobra.EnablePrefixMatching = true
+	cobra.EnableTraverseRunHooks = true
 }
 
 // GetRootCmd is exposed for integration tests. But it can be embedded into another suite, too.

tools/pd-ctl/tests/health/health_test.go

@@ -17,14 +17,21 @@ package health_test
 import (
 	"context"
 	"encoding/json"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
 	"testing"
 
 	"github.com/stretchr/testify/require"
+	"github.com/tikv/pd/pkg/utils/grpcutil"
 	"github.com/tikv/pd/server/api"
 	"github.com/tikv/pd/server/cluster"
+	"github.com/tikv/pd/server/config"
 	pdTests "github.com/tikv/pd/tests"
 	ctl "github.com/tikv/pd/tools/pd-ctl/pdctl"
 	"github.com/tikv/pd/tools/pd-ctl/tests"
+	"go.etcd.io/etcd/pkg/transport"
 )
 
 func TestHealth(t *testing.T) {
@@ -68,3 +75,80 @@ func TestHealth(t *testing.T) {
 	re.NoError(json.Unmarshal(output, &h))
 	re.Equal(healths, h)
 }
+
+func TestHealthTLS(t *testing.T) {
+	re := require.New(t)
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	certPath := "../cert"
+	certScript := "../cert_opt.sh"
+	// generate certs
+	if err := os.Mkdir(certPath, 0755); err != nil {
+		t.Fatal(err)
+	}
+	if err := exec.Command(certScript, "generate", certPath).Run(); err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		if err := exec.Command(certScript, "cleanup", certPath).Run(); err != nil {
+			t.Fatal(err)
+		}
+		if err := os.RemoveAll(certPath); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	tlsInfo := transport.TLSInfo{
+		KeyFile:       filepath.Join(certPath, "pd-server-key.pem"),
+		CertFile:      filepath.Join(certPath, "pd-server.pem"),
+		TrustedCAFile: filepath.Join(certPath, "ca.pem"),
+	}
+	tc, err := pdTests.NewTestCluster(ctx, 1, func(conf *config.Config, _ string) {
+		conf.Security.TLSConfig = grpcutil.TLSConfig{
+			KeyPath:  tlsInfo.KeyFile,
+			CertPath: tlsInfo.CertFile,
+			CAPath:   tlsInfo.TrustedCAFile,
+		}
+		conf.AdvertiseClientUrls = strings.ReplaceAll(conf.AdvertiseClientUrls, "http", "https")
+		conf.ClientUrls = strings.ReplaceAll(conf.ClientUrls, "http", "https")
+		conf.AdvertisePeerUrls = strings.ReplaceAll(conf.AdvertisePeerUrls, "http", "https")
+		conf.PeerUrls = strings.ReplaceAll(conf.PeerUrls, "http", "https")
+		conf.InitialCluster = strings.ReplaceAll(conf.InitialCluster, "http", "https")
+	})
+	re.NoError(err)
+	defer tc.Destroy()
+	err = tc.RunInitialServers()
+	re.NoError(err)
+	tc.WaitLeader()
+	cmd := ctl.GetRootCmd()
+
+	client := tc.GetEtcdClient()
+	members, err := cluster.GetMembers(client)
+	re.NoError(err)
+	healthMembers := cluster.CheckHealth(tc.GetHTTPClient(), members)
+	healths := []api.Health{}
+	for _, member := range members {
+		h := api.Health{
+			Name:       member.Name,
+			MemberID:   member.MemberId,
+			ClientUrls: member.ClientUrls,
+			Health:     false,
+		}
+		if _, ok := healthMembers[member.GetMemberId()]; ok {
+			h.Health = true
+		}
+		healths = append(healths, h)
+	}
+
+	pdAddr := tc.GetConfig().GetClientURL()
+	pdAddr = strings.ReplaceAll(pdAddr, "http", "https")
+	args := []string{"-u", pdAddr, "health",
+		"--cacert=../cert/ca.pem",
+		"--cert=../cert/client.pem",
+		"--key=../cert/client-key.pem"}
+	output, err := tests.ExecuteCommand(cmd, args...)
+	re.NoError(err)
+	h := make([]api.Health, len(healths))
+	re.NoError(json.Unmarshal(output, &h))
+	re.Equal(healths, h)
+}