mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-09-20 00:06:21 +00:00
316 lines
12 KiB
Go
316 lines
12 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 cloudcmd
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"net/url"
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"os"
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"path"
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"regexp"
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"runtime"
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"strings"
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"github.com/edgelesssys/constellation/v2/cli/internal/clusterid"
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"github.com/edgelesssys/constellation/v2/cli/internal/libvirt"
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"github.com/edgelesssys/constellation/v2/cli/internal/terraform"
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"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
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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/imagefetcher"
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)
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// Creator creates cloud resources.
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type Creator struct {
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out io.Writer
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image imageFetcher
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newTerraformClient func(ctx context.Context) (tfResourceClient, error)
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newLibvirtRunner func() libvirtRunner
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newRawDownloader func() rawDownloader
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policyPatcher policyPatcher
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}
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// NewCreator creates a new creator.
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func NewCreator(out io.Writer) *Creator {
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return &Creator{
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out: out,
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image: imagefetcher.New(),
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newTerraformClient: func(ctx context.Context) (tfResourceClient, error) {
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return terraform.New(ctx, constants.TerraformWorkingDir)
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},
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newLibvirtRunner: func() libvirtRunner {
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return libvirt.New()
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},
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newRawDownloader: func() rawDownloader {
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return imagefetcher.NewDownloader()
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},
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policyPatcher: NewAzurePolicyPatcher(),
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}
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}
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// CreateOptions are the options for creating a Constellation cluster.
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type CreateOptions struct {
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Provider cloudprovider.Provider
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Config *config.Config
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image string
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TFLogLevel terraform.LogLevel
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}
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// Create creates the handed amount of instances and all the needed resources.
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func (c *Creator) Create(ctx context.Context, opts CreateOptions) (clusterid.File, error) {
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provider := opts.Config.GetProvider()
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attestationVariant := opts.Config.GetAttestationConfig().GetVariant()
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region := opts.Config.GetRegion()
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image, err := c.image.FetchReference(ctx, provider, attestationVariant, opts.Config.Image, region)
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if err != nil {
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return clusterid.File{}, fmt.Errorf("fetching image reference: %w", err)
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}
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opts.image = image
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cl, err := c.newTerraformClient(ctx)
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if err != nil {
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return clusterid.File{}, err
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}
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defer cl.RemoveInstaller()
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var tfOutput terraform.ApplyOutput
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switch opts.Provider {
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case cloudprovider.AWS:
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tfOutput, err = c.createAWS(ctx, cl, opts)
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case cloudprovider.GCP:
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tfOutput, err = c.createGCP(ctx, cl, opts)
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case cloudprovider.Azure:
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tfOutput, err = c.createAzure(ctx, cl, opts)
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case cloudprovider.OpenStack:
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tfOutput, err = c.createOpenStack(ctx, cl, opts)
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case cloudprovider.QEMU:
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if runtime.GOARCH != "amd64" || runtime.GOOS != "linux" {
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return clusterid.File{}, fmt.Errorf("creation of a QEMU based Constellation is not supported for %s/%s", runtime.GOOS, runtime.GOARCH)
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}
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lv := c.newLibvirtRunner()
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qemuOpts := qemuCreateOptions{
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source: image,
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CreateOptions: opts,
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}
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tfOutput, err = c.createQEMU(ctx, cl, lv, qemuOpts)
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default:
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return clusterid.File{}, fmt.Errorf("unsupported cloud provider: %s", opts.Provider)
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}
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if err != nil {
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return clusterid.File{}, fmt.Errorf("creating cluster: %w", err)
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}
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res := clusterid.File{
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CloudProvider: opts.Provider,
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IP: tfOutput.IP,
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APIServerCertSANs: tfOutput.APIServerCertSANs,
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InitSecret: []byte(tfOutput.Secret),
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UID: tfOutput.UID,
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}
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if tfOutput.Azure != nil {
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res.AttestationURL = tfOutput.Azure.AttestationURL
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}
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return res, nil
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}
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func (c *Creator) createAWS(ctx context.Context, cl tfResourceClient, opts CreateOptions) (tfOutput terraform.ApplyOutput, retErr error) {
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vars := awsTerraformVars(opts.Config, opts.image)
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tfOutput, err := runTerraformCreate(ctx, cl, cloudprovider.AWS, vars, c.out, opts.TFLogLevel)
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if err != nil {
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return terraform.ApplyOutput{}, err
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}
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return tfOutput, nil
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}
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func (c *Creator) createGCP(ctx context.Context, cl tfResourceClient, opts CreateOptions) (tfOutput terraform.ApplyOutput, retErr error) {
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vars := gcpTerraformVars(opts.Config, opts.image)
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tfOutput, err := runTerraformCreate(ctx, cl, cloudprovider.GCP, vars, c.out, opts.TFLogLevel)
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if err != nil {
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return terraform.ApplyOutput{}, err
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}
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return tfOutput, nil
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}
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func (c *Creator) createAzure(ctx context.Context, cl tfResourceClient, opts CreateOptions) (tfOutput terraform.ApplyOutput, retErr error) {
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vars := azureTerraformVars(opts.Config, opts.image)
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tfOutput, err := runTerraformCreate(ctx, cl, cloudprovider.Azure, vars, c.out, opts.TFLogLevel)
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if err != nil {
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return terraform.ApplyOutput{}, err
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}
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if vars.GetCreateMAA() {
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// Patch the attestation policy to allow the cluster to boot while having secure boot disabled.
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if tfOutput.Azure == nil {
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return terraform.ApplyOutput{}, errors.New("no Terraform Azure output found")
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}
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if err := c.policyPatcher.Patch(ctx, tfOutput.Azure.AttestationURL); err != nil {
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return terraform.ApplyOutput{}, err
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}
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}
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return tfOutput, nil
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}
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// policyPatcher interacts with the CSP (currently only applies for Azure) to update the attestation policy.
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type policyPatcher interface {
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Patch(ctx context.Context, attestationURL string) error
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}
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// The azurerm Terraform provider enforces its own convention of case sensitivity for Azure URIs which Azure's API itself does not enforce or, even worse, actually returns.
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// Let's go loco with case insensitive Regexp here and fix the user input here to be compliant with this arbitrary design decision.
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var (
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caseInsensitiveSubscriptionsRegexp = regexp.MustCompile(`(?i)\/subscriptions\/`)
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caseInsensitiveResourceGroupRegexp = regexp.MustCompile(`(?i)\/resourcegroups\/`)
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caseInsensitiveProvidersRegexp = regexp.MustCompile(`(?i)\/providers\/`)
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caseInsensitiveUserAssignedIdentitiesRegexp = regexp.MustCompile(`(?i)\/userassignedidentities\/`)
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caseInsensitiveMicrosoftManagedIdentity = regexp.MustCompile(`(?i)\/microsoft.managedidentity\/`)
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caseInsensitiveCommunityGalleriesRegexp = regexp.MustCompile(`(?i)\/communitygalleries\/`)
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caseInsensitiveImagesRegExp = regexp.MustCompile(`(?i)\/images\/`)
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caseInsensitiveVersionsRegExp = regexp.MustCompile(`(?i)\/versions\/`)
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)
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func normalizeAzureURIs(vars *terraform.AzureClusterVariables) *terraform.AzureClusterVariables {
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vars.UserAssignedIdentity = caseInsensitiveSubscriptionsRegexp.ReplaceAllString(vars.UserAssignedIdentity, "/subscriptions/")
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vars.UserAssignedIdentity = caseInsensitiveResourceGroupRegexp.ReplaceAllString(vars.UserAssignedIdentity, "/resourceGroups/")
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vars.UserAssignedIdentity = caseInsensitiveProvidersRegexp.ReplaceAllString(vars.UserAssignedIdentity, "/providers/")
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vars.UserAssignedIdentity = caseInsensitiveUserAssignedIdentitiesRegexp.ReplaceAllString(vars.UserAssignedIdentity, "/userAssignedIdentities/")
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vars.UserAssignedIdentity = caseInsensitiveMicrosoftManagedIdentity.ReplaceAllString(vars.UserAssignedIdentity, "/Microsoft.ManagedIdentity/")
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vars.ImageID = caseInsensitiveCommunityGalleriesRegexp.ReplaceAllString(vars.ImageID, "/communityGalleries/")
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vars.ImageID = caseInsensitiveImagesRegExp.ReplaceAllString(vars.ImageID, "/images/")
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vars.ImageID = caseInsensitiveVersionsRegExp.ReplaceAllString(vars.ImageID, "/versions/")
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return vars
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}
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func (c *Creator) createOpenStack(ctx context.Context, cl tfResourceClient, opts CreateOptions) (tfOutput terraform.ApplyOutput, retErr error) {
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// TODO(malt3): Remove this once OpenStack is supported.
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if os.Getenv("CONSTELLATION_OPENSTACK_DEV") != "1" {
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return terraform.ApplyOutput{}, errors.New("OpenStack isn't supported yet")
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}
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if _, hasOSAuthURL := os.LookupEnv("OS_AUTH_URL"); !hasOSAuthURL && opts.Config.Provider.OpenStack.Cloud == "" {
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return terraform.ApplyOutput{}, errors.New(
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"neither environment variable OS_AUTH_URL nor cloud name for \"clouds.yaml\" is set. OpenStack authentication requires a set of " +
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"OS_* environment variables that are typically sourced into the current shell with an openrc file " +
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"or a cloud name for \"clouds.yaml\". " +
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"See https://docs.openstack.org/openstacksdk/latest/user/config/configuration.html for more information",
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)
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}
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vars := openStackTerraformVars(opts.Config, opts.image)
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tfOutput, err := runTerraformCreate(ctx, cl, cloudprovider.OpenStack, vars, c.out, opts.TFLogLevel)
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if err != nil {
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return terraform.ApplyOutput{}, err
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}
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return tfOutput, nil
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}
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func runTerraformCreate(ctx context.Context, cl tfResourceClient, provider cloudprovider.Provider, vars terraform.Variables, outWriter io.Writer, loglevel terraform.LogLevel) (output terraform.ApplyOutput, retErr error) {
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if err := cl.PrepareWorkspace(path.Join("terraform", strings.ToLower(provider.String())), vars); err != nil {
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return terraform.ApplyOutput{}, err
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}
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defer rollbackOnError(outWriter, &retErr, &rollbackerTerraform{client: cl}, loglevel)
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tfOutput, err := cl.CreateCluster(ctx, provider, loglevel)
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if err != nil {
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return terraform.ApplyOutput{}, err
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}
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return tfOutput, nil
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}
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type qemuCreateOptions struct {
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source string
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CreateOptions
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}
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func (c *Creator) createQEMU(ctx context.Context, cl tfResourceClient, lv libvirtRunner, opts qemuCreateOptions) (tfOutput terraform.ApplyOutput, retErr error) {
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qemuRollbacker := &rollbackerQEMU{client: cl, libvirt: lv, createdWorkspace: false}
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defer rollbackOnError(c.out, &retErr, qemuRollbacker, opts.TFLogLevel)
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// TODO(malt3): render progress bar
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downloader := c.newRawDownloader()
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imagePath, err := downloader.Download(ctx, c.out, false, opts.source, opts.Config.Image)
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if err != nil {
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return terraform.ApplyOutput{}, fmt.Errorf("download raw image: %w", err)
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}
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libvirtURI := opts.Config.Provider.QEMU.LibvirtURI
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libvirtSocketPath := "."
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switch {
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// if no libvirt URI is specified, start a libvirt container
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case libvirtURI == "":
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if err := lv.Start(ctx, opts.Config.Name, opts.Config.Provider.QEMU.LibvirtContainerImage); err != nil {
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return terraform.ApplyOutput{}, fmt.Errorf("start libvirt container: %w", err)
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}
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libvirtURI = libvirt.LibvirtTCPConnectURI
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// socket for system URI should be in /var/run/libvirt/libvirt-sock
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case libvirtURI == "qemu:///system":
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libvirtSocketPath = "/var/run/libvirt/libvirt-sock"
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// socket for session URI should be in /run/user/<uid>/libvirt/libvirt-sock
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case libvirtURI == "qemu:///session":
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libvirtSocketPath = fmt.Sprintf("/run/user/%d/libvirt/libvirt-sock", os.Getuid())
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// if a unix socket is specified we need to parse the URI to get the socket path
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case strings.HasPrefix(libvirtURI, "qemu+unix://"):
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unixURI, err := url.Parse(strings.TrimPrefix(libvirtURI, "qemu+unix://"))
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if err != nil {
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return terraform.ApplyOutput{}, err
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}
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libvirtSocketPath = unixURI.Query().Get("socket")
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if libvirtSocketPath == "" {
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return terraform.ApplyOutput{}, fmt.Errorf("socket path not specified in qemu+unix URI: %s", libvirtURI)
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}
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}
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metadataLibvirtURI := libvirtURI
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if libvirtSocketPath != "." {
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metadataLibvirtURI = "qemu:///system"
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}
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vars := qemuTerraformVars(opts.Config, imagePath, libvirtURI, libvirtSocketPath, metadataLibvirtURI)
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if opts.Config.Provider.QEMU.Firmware != "" {
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vars.Firmware = toPtr(opts.Config.Provider.QEMU.Firmware)
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}
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if err := cl.PrepareWorkspace(path.Join("terraform", strings.ToLower(cloudprovider.QEMU.String())), vars); err != nil {
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return terraform.ApplyOutput{}, fmt.Errorf("prepare workspace: %w", err)
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}
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// Allow rollback of QEMU Terraform workspace from this point on
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qemuRollbacker.createdWorkspace = true
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tfOutput, err = cl.CreateCluster(ctx, opts.Provider, opts.TFLogLevel)
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if err != nil {
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return terraform.ApplyOutput{}, fmt.Errorf("create cluster: %w", err)
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}
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return tfOutput, nil
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}
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func toPtr[T any](v T) *T {
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return &v
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}
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