mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-09-23 09:46:05 +00:00
327 lines
9.1 KiB
Go
327 lines
9.1 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 helm
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import (
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"bytes"
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"embed"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"io/fs"
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"os"
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"path/filepath"
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"strings"
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"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
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"github.com/edgelesssys/constellation/v2/internal/constants"
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"github.com/edgelesssys/constellation/v2/internal/deploy/helm"
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"github.com/edgelesssys/constellation/v2/internal/versions"
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"github.com/pkg/errors"
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"helm.sh/helm/pkg/ignore"
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"helm.sh/helm/v3/pkg/chart"
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"helm.sh/helm/v3/pkg/chart/loader"
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"helm.sh/helm/v3/pkg/chartutil"
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)
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// Run `go generate` to deterministically create the patched Helm deployment for cilium
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//go:generate ./generateCilium.sh
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//go:embed all:charts/*
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var HelmFS embed.FS
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type ChartLoader struct {
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joinServiceImage string
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kmsImage string
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ccmImage string
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}
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func New(csp cloudprovider.Provider, k8sVersion versions.ValidK8sVersion) *ChartLoader {
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var ccmImage string
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switch csp {
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case cloudprovider.AWS:
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ccmImage = versions.VersionConfigs[k8sVersion].CloudControllerManagerImageAWS
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case cloudprovider.Azure:
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ccmImage = versions.VersionConfigs[k8sVersion].CloudControllerManagerImageAzure
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case cloudprovider.GCP:
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ccmImage = versions.VersionConfigs[k8sVersion].CloudControllerManagerImageGCP
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}
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return &ChartLoader{
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joinServiceImage: versions.JoinImage,
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kmsImage: versions.KmsImage,
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ccmImage: ccmImage,
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}
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}
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func (i *ChartLoader) Load(csp cloudprovider.Provider, conformanceMode bool, masterSecret []byte, salt []byte, enforcedPCRs []uint32, enforceIDKeyDigest bool) ([]byte, error) {
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ciliumRelease, err := i.loadCilium(csp, conformanceMode)
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if err != nil {
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return nil, err
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}
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conServicesRelease, err := i.loadConstellationServices(csp, masterSecret, salt, enforcedPCRs, enforceIDKeyDigest)
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if err != nil {
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return nil, err
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}
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releases := helm.Releases{Cilium: ciliumRelease, ConstellationServices: conServicesRelease}
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rel, err := json.Marshal(releases)
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if err != nil {
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return nil, err
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}
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return rel, nil
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}
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func (i *ChartLoader) loadCilium(csp cloudprovider.Provider, conformanceMode bool) (helm.Release, error) {
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chart, err := loadChartsDir(HelmFS, "charts/cilium")
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if err != nil {
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return helm.Release{}, fmt.Errorf("loading cilium chart: %w", err)
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}
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chartRaw, err := i.marshalChart(chart)
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if err != nil {
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return helm.Release{}, fmt.Errorf("packaging chart: %w", err)
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}
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var ciliumVals map[string]any
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switch csp {
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case cloudprovider.GCP:
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ciliumVals = gcpVals
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case cloudprovider.Azure:
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ciliumVals = azureVals
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case cloudprovider.QEMU:
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ciliumVals = qemuVals
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default:
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return helm.Release{}, fmt.Errorf("unknown csp: %s", csp)
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}
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if conformanceMode {
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ciliumVals["kubeProxyReplacementHealthzBindAddr"] = ""
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ciliumVals["kubeProxyReplacement"] = "partial"
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ciliumVals["sessionAffinity"] = true
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ciliumVals["cni"] = map[string]any{
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"chainingMode": "portmap",
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}
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}
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return helm.Release{Chart: chartRaw, Values: ciliumVals, ReleaseName: "cilium", Wait: true}, nil
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}
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// loadConstellationServices loads the constellation-services chart from the embed.FS, marshals it into a helm-package .tgz and sets the values that can be set in the CLI.
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func (i *ChartLoader) loadConstellationServices(csp cloudprovider.Provider,
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masterSecret []byte, salt []byte, enforcedPCRs []uint32,
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enforceIDKeyDigest bool,
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) (helm.Release, error) {
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chart, err := loadChartsDir(HelmFS, "charts/edgeless/constellation-services")
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if err != nil {
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return helm.Release{}, fmt.Errorf("loading constellation-services chart: %w", err)
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}
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chartRaw, err := i.marshalChart(chart)
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if err != nil {
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return helm.Release{}, fmt.Errorf("packaging chart: %w", err)
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}
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enforcedPCRsJSON, err := json.Marshal(enforcedPCRs)
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if err != nil {
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return helm.Release{}, fmt.Errorf("marshaling enforcedPCRs: %w", err)
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}
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vals := map[string]any{
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"global": map[string]any{
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"kmsPort": constants.KMSPort,
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"serviceBasePath": constants.ServiceBasePath,
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"joinConfigCMName": constants.JoinConfigMap,
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"k8sVersionCMName": constants.K8sVersion,
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"internalCMName": constants.InternalConfigMap,
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},
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"kms": map[string]any{
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"image": i.kmsImage,
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"masterSecret": base64.StdEncoding.EncodeToString(masterSecret),
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"salt": base64.StdEncoding.EncodeToString(salt),
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"namespace": constants.ConstellationNamespace,
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"saltKeyName": constants.ConstellationSaltKey,
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"masterSecretKeyName": constants.ConstellationMasterSecretKey,
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"masterSecretName": constants.ConstellationMasterSecretStoreName,
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"measurementsFilename": constants.MeasurementsFilename,
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},
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"join-service": map[string]any{
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"csp": csp,
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"enforcedPCRs": string(enforcedPCRsJSON),
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"image": i.joinServiceImage,
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"namespace": constants.ConstellationNamespace,
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},
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"ccm": map[string]interface{}{
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"csp": csp,
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},
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}
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switch csp {
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case cloudprovider.Azure:
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{
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joinServiceVals, ok := vals["join-service"].(map[string]any)
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if !ok {
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return helm.Release{}, errors.New("invalid join-service values")
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}
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joinServiceVals["enforceIdKeyDigest"] = enforceIDKeyDigest
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ccmVals, ok := vals["ccm"].(map[string]any)
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if !ok {
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return helm.Release{}, errors.New("invalid ccm values")
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}
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ccmVals["Azure"] = map[string]any{
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"image": i.ccmImage,
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}
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vals["tags"] = map[string]any{
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"Azure": true,
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}
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}
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case cloudprovider.GCP:
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{
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ccmVals, ok := vals["ccm"].(map[string]any)
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if !ok {
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return helm.Release{}, errors.New("invalid ccm values")
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}
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ccmVals["GCP"] = map[string]any{
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"image": i.ccmImage,
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}
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vals["tags"] = map[string]any{
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"GCP": true,
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}
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}
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case cloudprovider.QEMU:
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{
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vals["tags"] = map[string]interface{}{
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"QEMU": true,
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}
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}
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case cloudprovider.AWS:
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ccmVals, ok := vals["ccm"].(map[string]any)
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if !ok {
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return helm.Release{}, errors.New("invalid ccm values")
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}
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ccmVals["AWS"] = map[string]any{
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"image": i.ccmImage,
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}
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vals["tags"] = map[string]any{
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"AWS": true,
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}
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}
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return helm.Release{Chart: chartRaw, Values: vals, ReleaseName: "constellation-services", Wait: true}, nil
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}
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// marshalChart takes a Chart object, packages it to a temporary file and returns the content of that file.
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// We currently need to take this approach of marshaling as dependencies are not marshaled correctly with json.Marshal.
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// This stems from the fact that chart.Chart does not export the dependencies property.
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func (i *ChartLoader) marshalChart(chart *chart.Chart) ([]byte, error) {
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// A separate tmpdir path is necessary since during unit testing multiple go routines are accessing the same path, possibly deleting files for other routines.
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tmpDirPath, err := os.MkdirTemp("", "*")
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defer os.Remove(tmpDirPath)
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if err != nil {
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return nil, fmt.Errorf("creating tmp dir: %w", err)
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}
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path, err := chartutil.Save(chart, tmpDirPath)
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defer os.Remove(path)
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if err != nil {
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return nil, fmt.Errorf("chartutil save: %w", err)
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}
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chartRaw, err := os.ReadFile(path)
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if err != nil {
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return nil, fmt.Errorf("reading packaged chart: %w", err)
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}
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return chartRaw, nil
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}
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// taken from loader.LoadDir from the helm go module
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// loadChartsDir loads from a directory.
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//
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// This loads charts only from directories.
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func loadChartsDir(efs embed.FS, dir string) (*chart.Chart, error) {
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utf8bom := []byte{0xEF, 0xBB, 0xBF}
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// Just used for errors.
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c := &chart.Chart{}
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rules := ignore.Empty()
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ifile, err := efs.ReadFile(filepath.Join(dir, ignore.HelmIgnore))
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if err == nil {
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r, err := ignore.Parse(bytes.NewReader(ifile))
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if err != nil {
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return c, err
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}
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rules = r
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}
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rules.AddDefaults()
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files := []*loader.BufferedFile{}
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walk := func(path string, d fs.DirEntry, err error) error {
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n := strings.TrimPrefix(path, dir)
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if n == "" {
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// No need to process top level. Avoid bug with helmignore .* matching
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// empty names. See issue https://github.com/kubernetes/helm/issues/1776.
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return nil
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}
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// Normalize to / since it will also work on Windows
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n = filepath.ToSlash(n)
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// Check input err
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if err != nil {
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return err
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}
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fi, err := d.Info()
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if err != nil {
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return err
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}
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if d.IsDir() {
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// Directory-based ignore rules should involve skipping the entire
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// contents of that directory.
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if rules.Ignore(n, fi) {
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return filepath.SkipDir
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}
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return nil
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}
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// If a .helmignore file matches, skip this file.
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if rules.Ignore(n, fi) {
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return nil
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}
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// Irregular files include devices, sockets, and other uses of files that
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// are not regular files. In Go they have a file mode type bit set.
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// See https://golang.org/pkg/os/#FileMode for examples.
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if !fi.Mode().IsRegular() {
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return fmt.Errorf("cannot load irregular file %s as it has file mode type bits set", path)
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}
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data, err := efs.ReadFile(path)
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if err != nil {
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return errors.Wrapf(err, "error reading %s", n)
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}
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data = bytes.TrimPrefix(data, utf8bom)
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n = strings.TrimPrefix(n, "/")
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files = append(files, &loader.BufferedFile{Name: n, Data: data})
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return nil
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}
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if err := fs.WalkDir(efs, dir, walk); err != nil {
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return c, err
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}
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return loader.LoadFiles(files)
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}
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