mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-10-01 01:36:09 -04:00
605 lines
25 KiB
Go
605 lines
25 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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package cmd
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"io"
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"io/fs"
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"net"
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"os"
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"path/filepath"
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"slices"
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"strings"
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"time"
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"github.com/edgelesssys/constellation/v2/cli/internal/cloudcmd"
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"github.com/edgelesssys/constellation/v2/cli/internal/helm"
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"github.com/edgelesssys/constellation/v2/cli/internal/kubecmd"
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"github.com/edgelesssys/constellation/v2/cli/internal/state"
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"github.com/edgelesssys/constellation/v2/internal/api/attestationconfigapi"
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"github.com/edgelesssys/constellation/v2/internal/atls"
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"github.com/edgelesssys/constellation/v2/internal/attestation/variant"
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"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
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"github.com/edgelesssys/constellation/v2/internal/compatibility"
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"github.com/edgelesssys/constellation/v2/internal/config"
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"github.com/edgelesssys/constellation/v2/internal/constants"
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"github.com/edgelesssys/constellation/v2/internal/file"
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"github.com/edgelesssys/constellation/v2/internal/grpc/dialer"
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"github.com/edgelesssys/constellation/v2/internal/license"
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"github.com/edgelesssys/constellation/v2/internal/versions"
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"github.com/spf13/afero"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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k8serrors "k8s.io/apimachinery/pkg/api/errors"
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)
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// phases that can be skipped during apply.
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// New phases should also be added to [allPhases].
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const (
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// skipInfrastructurePhase skips the Terraform apply of the apply process.
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skipInfrastructurePhase skipPhase = "infrastructure"
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// skipInitPhase skips the init RPC of the apply process.
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skipInitPhase skipPhase = "init"
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// skipAttestationConfigPhase skips the attestation config upgrade of the apply process.
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skipAttestationConfigPhase skipPhase = "attestationconfig"
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// skipCertSANsPhase skips the cert SANs upgrade of the apply process.
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skipCertSANsPhase skipPhase = "certsans"
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// skipHelmPhase skips the helm upgrade of the apply process.
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skipHelmPhase skipPhase = "helm"
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// skipImagePhase skips the image upgrade of the apply process.
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skipImagePhase skipPhase = "image"
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// skipK8sPhase skips the Kubernetes version upgrade of the apply process.
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skipK8sPhase skipPhase = "k8s"
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)
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// allPhases returns a list of all phases that can be skipped as strings.
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func allPhases() []string {
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return []string{
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string(skipInfrastructurePhase),
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string(skipInitPhase),
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string(skipAttestationConfigPhase),
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string(skipCertSANsPhase),
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string(skipHelmPhase),
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string(skipImagePhase),
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string(skipK8sPhase),
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}
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}
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// formatSkipPhases returns a formatted string of all phases that can be skipped.
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func formatSkipPhases() string {
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return fmt.Sprintf("{ %s }", strings.Join(allPhases(), " | "))
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}
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// skipPhase is a phase of the upgrade process that can be skipped.
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type skipPhase string
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// skipPhases is a list of phases that can be skipped during the upgrade process.
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type skipPhases map[skipPhase]struct{}
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// contains returns true if the list of phases contains the given phase.
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func (s skipPhases) contains(phase skipPhase) bool {
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_, ok := s[skipPhase(strings.ToLower(string(phase)))]
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return ok
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}
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// add a phase to the list of phases.
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func (s *skipPhases) add(phases ...skipPhase) {
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if *s == nil {
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*s = make(skipPhases)
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}
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for _, phase := range phases {
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(*s)[skipPhase(strings.ToLower(string(phase)))] = struct{}{}
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}
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}
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// NewApplyCmd creates the apply command.
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func NewApplyCmd() *cobra.Command {
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cmd := &cobra.Command{
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Use: "apply",
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Short: "Apply a configuration to a Constellation cluster",
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Long: "Apply a configuration to a Constellation cluster to initialize or upgrade the cluster.",
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Args: cobra.NoArgs,
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RunE: runApply,
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}
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cmd.Flags().Bool("conformance", false, "enable conformance mode")
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cmd.Flags().Bool("skip-helm-wait", false, "install helm charts without waiting for deployments to be ready")
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cmd.Flags().Bool("merge-kubeconfig", false, "merge Constellation kubeconfig file with default kubeconfig file in $HOME/.kube/config")
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cmd.Flags().BoolP("yes", "y", false, "run command without further confirmation\n"+
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"WARNING: the command might delete or update existing resources without additional checks. Please read the docs.\n")
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cmd.Flags().Duration("timeout", 5*time.Minute, "change helm upgrade timeout\n"+
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"Might be useful for slow connections or big clusters.")
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cmd.Flags().StringSlice("skip-phases", nil, "comma-separated list of upgrade phases to skip\n"+
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fmt.Sprintf("one or multiple of %s", formatSkipPhases()))
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must(cmd.Flags().MarkHidden("timeout"))
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return cmd
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}
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// applyFlags defines the flags for the apply command.
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type applyFlags struct {
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rootFlags
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yes bool
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conformance bool
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mergeConfigs bool
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upgradeTimeout time.Duration
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helmWaitMode helm.WaitMode
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skipPhases skipPhases
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}
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// parse the apply command flags.
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func (f *applyFlags) parse(flags *pflag.FlagSet) error {
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if err := f.rootFlags.parse(flags); err != nil {
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return err
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}
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rawSkipPhases, err := flags.GetStringSlice("skip-phases")
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if err != nil {
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return fmt.Errorf("getting 'skip-phases' flag: %w", err)
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}
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var skipPhases skipPhases
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for _, phase := range rawSkipPhases {
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phase = strings.ToLower(phase)
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if slices.Contains(allPhases(), phase) {
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skipPhases.add(skipPhase(phase))
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} else {
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return fmt.Errorf("invalid phase %s", phase)
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}
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}
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f.skipPhases = skipPhases
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f.yes, err = flags.GetBool("yes")
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if err != nil {
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return fmt.Errorf("getting 'yes' flag: %w", err)
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}
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f.upgradeTimeout, err = flags.GetDuration("timeout")
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if err != nil {
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return fmt.Errorf("getting 'timeout' flag: %w", err)
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}
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f.conformance, err = flags.GetBool("conformance")
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if err != nil {
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return fmt.Errorf("getting 'conformance' flag: %w", err)
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}
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skipHelmWait, err := flags.GetBool("skip-helm-wait")
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if err != nil {
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return fmt.Errorf("getting 'skip-helm-wait' flag: %w", err)
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}
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f.helmWaitMode = helm.WaitModeAtomic
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if skipHelmWait {
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f.helmWaitMode = helm.WaitModeNone
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}
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f.mergeConfigs, err = flags.GetBool("merge-kubeconfig")
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if err != nil {
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return fmt.Errorf("getting 'merge-kubeconfig' flag: %w", err)
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}
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return nil
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}
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// runApply sets up the apply command and runs it.
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func runApply(cmd *cobra.Command, _ []string) error {
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log, err := newCLILogger(cmd)
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if err != nil {
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return fmt.Errorf("creating logger: %w", err)
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}
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defer log.Sync()
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spinner, err := newSpinnerOrStderr(cmd)
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if err != nil {
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return err
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}
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defer spinner.Stop()
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flags := applyFlags{}
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if err := flags.parse(cmd.Flags()); err != nil {
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return err
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}
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fileHandler := file.NewHandler(afero.NewOsFs())
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newDialer := func(validator atls.Validator) *dialer.Dialer {
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return dialer.New(nil, validator, &net.Dialer{})
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}
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newKubeUpgrader := func(w io.Writer, kubeConfigPath string, log debugLog) (kubernetesUpgrader, error) {
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return kubecmd.New(w, kubeConfigPath, fileHandler, log)
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}
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newHelmClient := func(kubeConfigPath string, log debugLog) (helmApplier, error) {
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return helm.NewClient(kubeConfigPath, log)
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}
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upgradeID := generateUpgradeID(upgradeCmdKindApply)
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upgradeDir := filepath.Join(constants.UpgradeDir, upgradeID)
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newClusterApplier := func(ctx context.Context) (clusterUpgrader, error) {
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return cloudcmd.NewClusterUpgrader(
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ctx,
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constants.TerraformWorkingDir,
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upgradeDir,
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flags.tfLogLevel,
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fileHandler,
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)
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}
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apply := &applyCmd{
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fileHandler: fileHandler,
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flags: flags,
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log: log,
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spinner: spinner,
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merger: &kubeconfigMerger{log: log},
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quotaChecker: license.NewClient(),
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newHelmClient: newHelmClient,
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newDialer: newDialer,
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newKubeUpgrader: newKubeUpgrader,
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newClusterApplier: newClusterApplier,
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}
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ctx, cancel := context.WithTimeout(cmd.Context(), time.Hour)
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defer cancel()
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cmd.SetContext(ctx)
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return apply.apply(cmd, attestationconfigapi.NewFetcher(), upgradeDir)
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}
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type applyCmd struct {
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fileHandler file.Handler
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flags applyFlags
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log debugLog
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spinner spinnerInterf
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merger configMerger
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quotaChecker license.QuotaChecker
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newHelmClient func(kubeConfigPath string, log debugLog) (helmApplier, error)
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newDialer func(validator atls.Validator) *dialer.Dialer
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newKubeUpgrader func(out io.Writer, kubeConfigPath string, log debugLog) (kubernetesUpgrader, error)
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newClusterApplier func(context.Context) (clusterUpgrader, error)
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}
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/*
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apply updates a Constellation cluster by applying a user's config.
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The control flow is as follows:
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┌───────▼───────┐
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│Parse Flags │
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│ │
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│Read Config │
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│ │
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│Read State-File│
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│ │
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│Validate input │
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└───────┬───────┘
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│ ───┐
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┌──────────────────▼───────────────────┐ │
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│Check if Terraform state is up to date│ │
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└──────────────────┬──┬────────────────┘ │
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│ │Not up to date │
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│ │(Diff from Terraform plan)│
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│ └────────────┐ │
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│ │ |Infrastructure
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│ ┌────────────▼──────────┐ │Phase
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│ │Apply Terraform updates│ │
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│ └────────────┬──────────┘ │
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│ │ │
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│ ┌────────────┘ │
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│ │ ───┘
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┌──────────────────▼──▼────────────┐
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│Check for constellation-admin.conf│
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└───────────────┬──┬───────────────┘
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File does not exist│ │
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┌───────────────┘ │ ───┐
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│ │ │
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┌────────────▼────────────┐ │ │
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│Run Bootstrapper Init RPC│ │ │
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└────────────┬────────────┘ │File does exist │
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│ │ │
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┌──────────────▼───────────────┐ │ │Init
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│Write constellation-admin.conf│ │ │Phase
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└──────────────┬───────────────┘ │ │
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│ │ │
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┌──────────────▼───────────────┐ │ │
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│Prepare "Init Success" Message│ │ │
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└──────────────┬───────────────┘ │ │
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│ │ │
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└───────────────┐ │ ───┘
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│ │ ───┐
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┌──────────▼──▼──────────┐ │AttestationConfig
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│Apply Attestation Config│ │Phase
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└─────────────┬──────────┘ ───┘
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│ ───┐
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┌──────────────▼────────────┐ │CertSANs
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│Extend API Server Cert SANs│ │Phase
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└──────────────┬────────────┘ ───┘
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│ ───┐
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┌──────────▼────────┐ │Helm
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│ Apply Helm Charts │ │Phase
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└──────────┬────────┘ ───┘
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│ ───┐
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┌─────────────▼────────────┐ │
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Can be skipped │Upgrade NodeVersion object│ │K8s/Image
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if we ran Init RP │ (Image and K8s update) │ │Phase
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└─────────────┬────────────┘ │
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│ ───┘
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┌─────────▼──────────┐
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│Write success output│
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└────────────────────┘
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*/
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func (a *applyCmd) apply(cmd *cobra.Command, configFetcher attestationconfigapi.Fetcher, upgradeDir string) error {
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// Validate inputs
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conf, stateFile, err := a.validateInputs(cmd, configFetcher)
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if err != nil {
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return err
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}
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// Now start actually running the apply command
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// Check current Terraform state, if it exists and infrastructure upgrades are not skipped,
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// and apply migrations if necessary.
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if !a.flags.skipPhases.contains(skipInfrastructurePhase) {
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if err := a.runTerraformApply(cmd, conf, stateFile, upgradeDir); err != nil {
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return fmt.Errorf("applying Terraform configuration : %w", err)
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}
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}
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bufferedOutput := &bytes.Buffer{}
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// Run init RPC if required
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if !a.flags.skipPhases.contains(skipInitPhase) {
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bufferedOutput, err = a.runInit(cmd, conf, stateFile)
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if err != nil {
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return err
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}
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}
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// From now on we can assume a valid Kubernetes admin config file exists
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a.log.Debugf("Creating Kubernetes client using %s", a.flags.pathPrefixer.PrefixPrintablePath(constants.AdminConfFilename))
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kubeUpgrader, err := a.newKubeUpgrader(cmd.OutOrStdout(), constants.AdminConfFilename, a.log)
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if err != nil {
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return err
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}
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// Apply Attestation Config
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if !a.flags.skipPhases.contains(skipAttestationConfigPhase) {
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a.log.Debugf("Applying new attestation config to cluster")
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if err := a.applyJoinConfig(cmd, kubeUpgrader, conf.GetAttestationConfig(), stateFile.ClusterValues.MeasurementSalt); err != nil {
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return fmt.Errorf("applying attestation config: %w", err)
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}
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}
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// Extend API Server Cert SANs
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if !a.flags.skipPhases.contains(skipCertSANsPhase) {
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sans := append([]string{stateFile.Infrastructure.ClusterEndpoint, conf.CustomEndpoint}, stateFile.Infrastructure.APIServerCertSANs...)
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if err := kubeUpgrader.ExtendClusterConfigCertSANs(cmd.Context(), sans); err != nil {
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return fmt.Errorf("extending cert SANs: %w", err)
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}
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}
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// Apply Helm Charts
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if !a.flags.skipPhases.contains(skipHelmPhase) {
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if err := a.runHelmApply(cmd, conf, stateFile, kubeUpgrader, upgradeDir); err != nil {
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return err
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}
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}
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// Upgrade NodeVersion object
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// This can be skipped if we ran the init RPC, as the NodeVersion object is already up to date
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if !(a.flags.skipPhases.contains(skipK8sPhase) && a.flags.skipPhases.contains(skipImagePhase)) &&
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a.flags.skipPhases.contains(skipInitPhase) {
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if err := a.runK8sUpgrade(cmd, conf, kubeUpgrader); err != nil {
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return err
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}
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}
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// Write success output
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cmd.Print(bufferedOutput.String())
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return nil
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}
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func (a *applyCmd) validateInputs(cmd *cobra.Command, configFetcher attestationconfigapi.Fetcher) (*config.Config, *state.State, error) {
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// Read user's config and state file
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a.log.Debugf("Reading config from %s", a.flags.pathPrefixer.PrefixPrintablePath(constants.ConfigFilename))
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conf, err := config.New(a.fileHandler, constants.ConfigFilename, configFetcher, a.flags.force)
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var configValidationErr *config.ValidationError
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if errors.As(err, &configValidationErr) {
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cmd.PrintErrln(configValidationErr.LongMessage())
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}
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if err != nil {
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return nil, nil, err
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}
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a.log.Debugf("Reading state file from %s", a.flags.pathPrefixer.PrefixPrintablePath(constants.StateFilename))
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stateFile, err := state.ReadFromFile(a.fileHandler, constants.StateFilename)
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if err != nil {
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return nil, nil, err
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}
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// Check license
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a.log.Debugf("Running license check")
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checker := license.NewChecker(a.quotaChecker, a.fileHandler)
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if err := checker.CheckLicense(cmd.Context(), conf.GetProvider(), conf.Provider, cmd.Printf); err != nil {
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cmd.PrintErrf("License check failed: %v", err)
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}
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a.log.Debugf("Checked license")
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// Check if we already have a running Kubernetes cluster
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// by checking if the Kubernetes admin config file exists
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// If it exist, we skip the init phase
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// If it does not exist, we need to run the init RPC first
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// This may break things further down the line
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// It is the user's responsibility to make sure the cluster is in a valid state
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a.log.Debugf("Checking if %s exists", a.flags.pathPrefixer.PrefixPrintablePath(constants.AdminConfFilename))
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if _, err := a.fileHandler.Stat(constants.AdminConfFilename); err == nil {
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a.flags.skipPhases.add(skipInitPhase)
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} else if !errors.Is(err, os.ErrNotExist) {
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return nil, nil, fmt.Errorf("checking for %s: %w", a.flags.pathPrefixer.PrefixPrintablePath(constants.AdminConfFilename), err)
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}
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a.log.Debugf("Init RPC required: %t", !a.flags.skipPhases.contains(skipInitPhase))
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// Validate input arguments
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// Validate Kubernetes version as set in the user's config
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// If we need to run the init RPC, the version has to be valid
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// Otherwise, we are able to use an outdated version, meaning we skip the K8s upgrade
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// We skip version validation if the user explicitly skips the Kubernetes phase
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a.log.Debugf("Validating Kubernetes version %s", conf.KubernetesVersion)
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validVersion, err := versions.NewValidK8sVersion(string(conf.KubernetesVersion), true)
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if err != nil && !a.flags.skipPhases.contains(skipK8sPhase) {
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a.log.Debugf("Kubernetes version not valid: %s", err)
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if !a.flags.skipPhases.contains(skipInitPhase) {
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return nil, nil, err
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}
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a.log.Debugf("Checking if user wants to continue anyway")
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if !a.flags.yes {
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confirmed, err := askToConfirm(cmd,
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fmt.Sprintf(
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"WARNING: The Kubernetes patch version %s is not supported. If you continue, Kubernetes upgrades will be skipped. Do you want to continue anyway?",
|
|
validVersion,
|
|
),
|
|
)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("asking for confirmation: %w", err)
|
|
}
|
|
if !confirmed {
|
|
return nil, nil, fmt.Errorf("aborted by user")
|
|
}
|
|
}
|
|
a.flags.skipPhases.add(skipK8sPhase)
|
|
a.log.Debugf("Outdated Kubernetes version accepted, Kubernetes upgrade will be skipped")
|
|
}
|
|
if versions.IsPreviewK8sVersion(validVersion) {
|
|
cmd.PrintErrf("Warning: Constellation with Kubernetes %s is still in preview. Use only for evaluation purposes.\n", validVersion)
|
|
}
|
|
conf.KubernetesVersion = validVersion
|
|
a.log.Debugf("Target Kubernetes version set to %s", conf.KubernetesVersion)
|
|
|
|
// Validate microservice version (helm versions) in the user's config matches the version of the CLI
|
|
// This makes sure we catch potential errors early, not just after we already ran Terraform migrations or the init RPC
|
|
if !a.flags.force && !a.flags.skipPhases.contains(skipHelmPhase) && !a.flags.skipPhases.contains(skipInitPhase) {
|
|
if err := validateCLIandConstellationVersionAreEqual(constants.BinaryVersion(), conf.Image, conf.MicroserviceVersion); err != nil {
|
|
return nil, nil, err
|
|
}
|
|
}
|
|
|
|
// Constellation on QEMU or OpenStack don't support upgrades
|
|
// If using one of those providers, make sure the command is only used to initialize a cluster
|
|
if !(conf.GetProvider() == cloudprovider.AWS || conf.GetProvider() == cloudprovider.Azure || conf.GetProvider() == cloudprovider.GCP) {
|
|
if a.flags.skipPhases.contains(skipInitPhase) {
|
|
return nil, nil, fmt.Errorf("upgrades are not supported for provider %s", conf.GetProvider())
|
|
}
|
|
// Skip Terraform phase
|
|
a.log.Debugf("Skipping Infrastructure upgrade")
|
|
a.flags.skipPhases.add(skipInfrastructurePhase)
|
|
}
|
|
|
|
// Check if Terraform state exists
|
|
if tfStateExists, err := a.tfStateExists(); err != nil {
|
|
return nil, nil, fmt.Errorf("checking Terraform state: %w", err)
|
|
} else if !tfStateExists {
|
|
a.flags.skipPhases.add(skipInfrastructurePhase)
|
|
a.log.Debugf("No Terraform state found in current working directory. Assuming self-managed infrastructure. Infrastructure upgrades will not be performed.")
|
|
}
|
|
|
|
// Print warning about AWS attestation
|
|
// TODO(derpsteb): remove once AWS fixes SEV-SNP attestation provisioning issues
|
|
if !a.flags.skipPhases.contains(skipInitPhase) && conf.GetAttestationConfig().GetVariant().Equal(variant.AWSSEVSNP{}) {
|
|
cmd.PrintErrln("WARNING: Attestation temporarily relies on AWS nitroTPM. See https://docs.edgeless.systems/constellation/workflows/config#choosing-a-vm-type for more information.")
|
|
}
|
|
|
|
return conf, stateFile, nil
|
|
}
|
|
|
|
// applyJoincConfig creates or updates the cluster's join config.
|
|
// If the config already exists, and is different from the new config, the user is asked to confirm the upgrade.
|
|
func (a *applyCmd) applyJoinConfig(
|
|
cmd *cobra.Command, kubeUpgrader kubernetesUpgrader, newConfig config.AttestationCfg, measurementSalt []byte,
|
|
) error {
|
|
clusterAttestationConfig, err := kubeUpgrader.GetClusterAttestationConfig(cmd.Context(), newConfig.GetVariant())
|
|
if err != nil {
|
|
a.log.Debugf("Getting cluster attestation config failed: %s", err)
|
|
if k8serrors.IsNotFound(err) {
|
|
a.log.Debugf("Creating new join config")
|
|
return kubeUpgrader.ApplyJoinConfig(cmd.Context(), newConfig, measurementSalt)
|
|
}
|
|
return fmt.Errorf("getting cluster attestation config: %w", err)
|
|
}
|
|
|
|
// If the current config is equal, or there is an error when comparing the configs, we skip the upgrade.
|
|
equal, err := newConfig.EqualTo(clusterAttestationConfig)
|
|
if err != nil {
|
|
return fmt.Errorf("comparing attestation configs: %w", err)
|
|
}
|
|
if equal {
|
|
a.log.Debugf("Current attestation config is equal to the new config, nothing to do")
|
|
return nil
|
|
}
|
|
|
|
cmd.Println("The configured attestation config is different from the attestation config in the cluster.")
|
|
diffStr, err := diffAttestationCfg(clusterAttestationConfig, newConfig)
|
|
if err != nil {
|
|
return fmt.Errorf("diffing attestation configs: %w", err)
|
|
}
|
|
cmd.Println("The following changes will be applied to the attestation config:")
|
|
cmd.Println(diffStr)
|
|
if !a.flags.yes {
|
|
ok, err := askToConfirm(cmd, "Are you sure you want to change your cluster's attestation config?")
|
|
if err != nil {
|
|
return fmt.Errorf("asking for confirmation: %w", err)
|
|
}
|
|
if !ok {
|
|
return errors.New("aborting upgrade since attestation config is different")
|
|
}
|
|
}
|
|
|
|
if err := kubeUpgrader.ApplyJoinConfig(cmd.Context(), newConfig, measurementSalt); err != nil {
|
|
return fmt.Errorf("updating attestation config: %w", err)
|
|
}
|
|
cmd.Println("Successfully updated the cluster's attestation config")
|
|
|
|
return nil
|
|
}
|
|
|
|
// runK8sUpgrade upgrades image and Kubernetes version of the Constellation cluster.
|
|
func (a *applyCmd) runK8sUpgrade(cmd *cobra.Command, conf *config.Config, kubeUpgrader kubernetesUpgrader,
|
|
) error {
|
|
err := kubeUpgrader.UpgradeNodeVersion(
|
|
cmd.Context(), conf, a.flags.force,
|
|
a.flags.skipPhases.contains(skipImagePhase),
|
|
a.flags.skipPhases.contains(skipK8sPhase),
|
|
)
|
|
|
|
var upgradeErr *compatibility.InvalidUpgradeError
|
|
switch {
|
|
case errors.Is(err, kubecmd.ErrInProgress):
|
|
cmd.PrintErrln("Skipping image and Kubernetes upgrades. Another upgrade is in progress.")
|
|
case errors.As(err, &upgradeErr):
|
|
cmd.PrintErrln(err)
|
|
case err != nil:
|
|
return fmt.Errorf("upgrading NodeVersion: %w", err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// tfStateExists checks whether a Constellation Terraform state exists in the current working directory.
|
|
func (a *applyCmd) tfStateExists() (bool, error) {
|
|
_, err := a.fileHandler.Stat(constants.TerraformWorkingDir)
|
|
if err != nil {
|
|
if errors.Is(err, fs.ErrNotExist) {
|
|
return false, nil
|
|
}
|
|
return false, fmt.Errorf("reading Terraform state: %w", err)
|
|
}
|
|
return true, nil
|
|
}
|