constellation/cli/internal/cmd/init.go
2022-11-28 19:34:02 +01:00

363 lines
12 KiB
Go

/*
Copyright (c) Edgeless Systems GmbH
SPDX-License-Identifier: AGPL-3.0-only
*/
package cmd
import (
"context"
"encoding/hex"
"errors"
"fmt"
"io"
"net"
"strconv"
"text/tabwriter"
"time"
"github.com/edgelesssys/constellation/v2/bootstrapper/initproto"
"github.com/edgelesssys/constellation/v2/cli/internal/cloudcmd"
"github.com/edgelesssys/constellation/v2/cli/internal/clusterid"
"github.com/edgelesssys/constellation/v2/cli/internal/helm"
"github.com/edgelesssys/constellation/v2/internal/cloud/azureshared"
"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
"github.com/edgelesssys/constellation/v2/internal/cloud/gcpshared"
"github.com/edgelesssys/constellation/v2/internal/config"
"github.com/edgelesssys/constellation/v2/internal/constants"
"github.com/edgelesssys/constellation/v2/internal/crypto"
"github.com/edgelesssys/constellation/v2/internal/file"
"github.com/edgelesssys/constellation/v2/internal/grpc/dialer"
grpcRetry "github.com/edgelesssys/constellation/v2/internal/grpc/retry"
"github.com/edgelesssys/constellation/v2/internal/license"
"github.com/edgelesssys/constellation/v2/internal/retry"
"github.com/edgelesssys/constellation/v2/internal/versions"
kms "github.com/edgelesssys/constellation/v2/kms/setup"
"github.com/spf13/afero"
"github.com/spf13/cobra"
"google.golang.org/grpc"
)
// NewInitCmd returns a new cobra.Command for the init command.
func NewInitCmd() *cobra.Command {
cmd := &cobra.Command{
Use: "init",
Short: "Initialize the Constellation cluster",
Long: "Initialize the Constellation cluster. Start your confidential Kubernetes.",
Args: cobra.ExactArgs(0),
RunE: runInitialize,
}
cmd.Flags().String("master-secret", "", "path to base64-encoded master secret")
cmd.Flags().Bool("conformance", false, "enable conformance mode")
return cmd
}
// runInitialize runs the initialize command.
func runInitialize(cmd *cobra.Command, args []string) error {
fileHandler := file.NewHandler(afero.NewOsFs())
newDialer := func(validator *cloudcmd.Validator) *dialer.Dialer {
return dialer.New(nil, validator.V(cmd), &net.Dialer{})
}
spinner := newSpinner(cmd.ErrOrStderr())
defer spinner.Stop()
ctx, cancel := context.WithTimeout(cmd.Context(), time.Hour)
defer cancel()
cmd.SetContext(ctx)
return initialize(cmd, newDialer, fileHandler, license.NewClient(), spinner)
}
// initialize initializes a Constellation.
func initialize(cmd *cobra.Command, newDialer func(validator *cloudcmd.Validator) *dialer.Dialer,
fileHandler file.Handler, quotaChecker license.QuotaChecker, spinner spinnerInterf,
) error {
flags, err := evalFlagArgs(cmd)
if err != nil {
return err
}
conf, err := config.New(fileHandler, flags.configPath)
if err != nil {
return displayConfigValidationErrors(cmd.ErrOrStderr(), err)
}
var idFile clusterid.File
if err := fileHandler.ReadJSON(constants.ClusterIDsFileName, &idFile); err != nil {
return fmt.Errorf("reading cluster ID file: %w", err)
}
k8sVersion, err := versions.NewValidK8sVersion(conf.KubernetesVersion)
if err != nil {
return fmt.Errorf("validating kubernetes version: %w", err)
}
if versions.IsPreviewK8sVersion(k8sVersion) {
cmd.PrintErrf("Warning: Constellation with Kubernetes %v is still in preview. Use only for evaluation purposes.\n", k8sVersion)
}
provider := conf.GetProvider()
checker := license.NewChecker(quotaChecker, fileHandler)
if err := checker.CheckLicense(cmd.Context(), provider, conf.Provider, cmd.Printf); err != nil {
cmd.PrintErrf("License check failed: %v", err)
}
validator, err := cloudcmd.NewValidator(provider, conf)
if err != nil {
return err
}
serviceAccURI, err := getMarshaledServiceAccountURI(provider, conf, fileHandler)
if err != nil {
return err
}
masterSecret, err := readOrGenerateMasterSecret(cmd.OutOrStdout(), fileHandler, flags.masterSecretPath)
if err != nil {
return fmt.Errorf("parsing or generating master secret from file %s: %w", flags.masterSecretPath, err)
}
helmLoader := helm.NewLoader(provider, k8sVersion)
helmDeployments, err := helmLoader.Load(conf, flags.conformance, masterSecret.Key, masterSecret.Salt)
if err != nil {
return fmt.Errorf("loading Helm charts: %w", err)
}
spinner.Start("Initializing cluster ", false)
req := &initproto.InitRequest{
MasterSecret: masterSecret.Key,
Salt: masterSecret.Salt,
KmsUri: kms.ClusterKMSURI,
StorageUri: kms.NoStoreURI,
KeyEncryptionKeyId: "",
UseExistingKek: false,
CloudServiceAccountUri: serviceAccURI,
KubernetesVersion: conf.KubernetesVersion,
KubernetesComponents: versions.VersionConfigs[k8sVersion].KubernetesComponents.ToProto(),
HelmDeployments: helmDeployments,
EnforcedPcrs: conf.EnforcedPCRs(),
EnforceIdkeydigest: conf.EnforcesIDKeyDigest(),
ConformanceMode: flags.conformance,
InitSecret: idFile.InitSecret,
}
resp, err := initCall(cmd.Context(), newDialer(validator), idFile.IP, req)
spinner.Stop()
if err != nil {
var nonRetriable *nonRetriableError
if errors.As(err, &nonRetriable) {
cmd.PrintErrln("Cluster initialization failed. This error is not recoverable.")
cmd.PrintErrln("Terminate your cluster and try again.")
}
return err
}
idFile.CloudProvider = provider
if err := writeOutput(idFile, resp, cmd.OutOrStdout(), fileHandler); err != nil {
return err
}
return nil
}
func initCall(ctx context.Context, dialer grpcDialer, ip string, req *initproto.InitRequest) (*initproto.InitResponse, error) {
doer := &initDoer{
dialer: dialer,
endpoint: net.JoinHostPort(ip, strconv.Itoa(constants.BootstrapperPort)),
req: req,
}
retrier := retry.NewIntervalRetrier(doer, 30*time.Second, grpcRetry.ServiceIsUnavailable)
if err := retrier.Do(ctx); err != nil {
return nil, err
}
return doer.resp, nil
}
type initDoer struct {
dialer grpcDialer
endpoint string
req *initproto.InitRequest
resp *initproto.InitResponse
}
func (d *initDoer) Do(ctx context.Context) error {
conn, err := d.dialer.Dial(ctx, d.endpoint)
if err != nil {
return fmt.Errorf("dialing init server: %w", err)
}
defer conn.Close()
protoClient := initproto.NewAPIClient(conn)
resp, err := protoClient.Init(ctx, d.req)
if err != nil {
return &nonRetriableError{fmt.Errorf("init call: %w", err)}
}
d.resp = resp
return nil
}
func writeOutput(idFile clusterid.File, resp *initproto.InitResponse, wr io.Writer, fileHandler file.Handler) error {
fmt.Fprint(wr, "Your Constellation cluster was successfully initialized.\n\n")
ownerID := hex.EncodeToString(resp.OwnerId)
clusterID := hex.EncodeToString(resp.ClusterId)
tw := tabwriter.NewWriter(wr, 0, 0, 2, ' ', 0)
// writeRow(tw, "Constellation cluster's owner identifier", ownerID)
writeRow(tw, "Constellation cluster identifier", clusterID)
writeRow(tw, "Kubernetes configuration", constants.AdminConfFilename)
tw.Flush()
fmt.Fprintln(wr)
if err := fileHandler.Write(constants.AdminConfFilename, resp.Kubeconfig, file.OptNone); err != nil {
return fmt.Errorf("writing kubeconfig: %w", err)
}
idFile.OwnerID = ownerID
idFile.ClusterID = clusterID
if err := fileHandler.WriteJSON(constants.ClusterIDsFileName, idFile, file.OptOverwrite); err != nil {
return fmt.Errorf("writing Constellation id file: %w", err)
}
fmt.Fprintln(wr, "You can now connect to your cluster by executing:")
fmt.Fprintf(wr, "\texport KUBECONFIG=\"$PWD/%s\"\n", constants.AdminConfFilename)
return nil
}
func writeRow(wr io.Writer, col1 string, col2 string) {
fmt.Fprint(wr, col1, "\t", col2, "\n")
}
// evalFlagArgs gets the flag values and does preprocessing of these values like
// reading the content from file path flags and deriving other values from flag combinations.
func evalFlagArgs(cmd *cobra.Command) (initFlags, error) {
masterSecretPath, err := cmd.Flags().GetString("master-secret")
if err != nil {
return initFlags{}, fmt.Errorf("parsing master-secret path flag: %w", err)
}
conformance, err := cmd.Flags().GetBool("conformance")
if err != nil {
return initFlags{}, fmt.Errorf("parsing autoscale flag: %w", err)
}
configPath, err := cmd.Flags().GetString("config")
if err != nil {
return initFlags{}, fmt.Errorf("parsing config path flag: %w", err)
}
return initFlags{
configPath: configPath,
conformance: conformance,
masterSecretPath: masterSecretPath,
}, nil
}
// initFlags are the resulting values of flag preprocessing.
type initFlags struct {
configPath string
masterSecretPath string
conformance bool
}
// masterSecret holds the master key and salt for deriving keys.
type masterSecret struct {
Key []byte `json:"key"`
Salt []byte `json:"salt"`
}
// readOrGenerateMasterSecret reads a base64 encoded master secret from file or generates a new 32 byte secret.
func readOrGenerateMasterSecret(outWriter io.Writer, fileHandler file.Handler, filename string) (masterSecret, error) {
if filename != "" {
var secret masterSecret
if err := fileHandler.ReadJSON(filename, &secret); err != nil {
return masterSecret{}, err
}
if len(secret.Key) < crypto.MasterSecretLengthMin {
return masterSecret{}, fmt.Errorf("provided master secret is smaller than the required minimum of %d Bytes", crypto.MasterSecretLengthMin)
}
if len(secret.Salt) < crypto.RNGLengthDefault {
return masterSecret{}, fmt.Errorf("provided salt is smaller than the required minimum of %d Bytes", crypto.RNGLengthDefault)
}
return secret, nil
}
// No file given, generate a new secret, and save it to disk
key, err := crypto.GenerateRandomBytes(crypto.MasterSecretLengthDefault)
if err != nil {
return masterSecret{}, err
}
salt, err := crypto.GenerateRandomBytes(crypto.RNGLengthDefault)
if err != nil {
return masterSecret{}, err
}
secret := masterSecret{
Key: key,
Salt: salt,
}
if err := fileHandler.WriteJSON(constants.MasterSecretFilename, secret, file.OptNone); err != nil {
return masterSecret{}, err
}
fmt.Fprintf(outWriter, "Your Constellation master secret was successfully written to ./%s\n", constants.MasterSecretFilename)
return secret, nil
}
func readIPFromIDFile(fileHandler file.Handler) (string, error) {
var idFile clusterid.File
if err := fileHandler.ReadJSON(constants.ClusterIDsFileName, &idFile); err != nil {
return "", err
}
if idFile.IP == "" {
return "", fmt.Errorf("missing IP address in %q", constants.ClusterIDsFileName)
}
return idFile.IP, nil
}
func getMarshaledServiceAccountURI(provider cloudprovider.Provider, config *config.Config, fileHandler file.Handler) (string, error) {
switch provider {
case cloudprovider.GCP:
path := config.Provider.GCP.ServiceAccountKeyPath
var key gcpshared.ServiceAccountKey
if err := fileHandler.ReadJSON(path, &key); err != nil {
return "", fmt.Errorf("reading service account key from path %q: %w", path, err)
}
return key.ToCloudServiceAccountURI(), nil
case cloudprovider.AWS:
return "", nil // AWS does not need a service account URI
case cloudprovider.Azure:
creds := azureshared.ApplicationCredentials{
TenantID: config.Provider.Azure.TenantID,
AppClientID: config.Provider.Azure.AppClientID,
ClientSecretValue: config.Provider.Azure.ClientSecretValue,
Location: config.Provider.Azure.Location,
}
return creds.ToCloudServiceAccountURI(), nil
case cloudprovider.QEMU:
return "", nil // QEMU does not use service account keys
default:
return "", fmt.Errorf("unsupported cloud provider %q", provider)
}
}
type grpcDialer interface {
Dial(ctx context.Context, target string) (*grpc.ClientConn, error)
}
type nonRetriableError struct {
err error
}
// Error returns the error message.
func (e *nonRetriableError) Error() string {
return e.err.Error()
}
// Unwrap returns the wrapped error.
func (e *nonRetriableError) Unwrap() error {
return e.err
}