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Unify cloudcmd create and upgrade code
Signed-off-by: Daniel Weiße <[email protected]>
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/* | ||
Copyright (c) Edgeless Systems GmbH | ||
SPDX-License-Identifier: AGPL-3.0-only | ||
*/ | ||
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package cloudcmd | ||
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import ( | ||
"context" | ||
"fmt" | ||
"io" | ||
"path/filepath" | ||
"strings" | ||
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"github.com/edgelesssys/constellation/v2/cli/internal/libvirt" | ||
"github.com/edgelesssys/constellation/v2/cli/internal/state" | ||
"github.com/edgelesssys/constellation/v2/cli/internal/terraform" | ||
"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider" | ||
"github.com/edgelesssys/constellation/v2/internal/config" | ||
"github.com/edgelesssys/constellation/v2/internal/constants" | ||
"github.com/edgelesssys/constellation/v2/internal/file" | ||
"github.com/edgelesssys/constellation/v2/internal/imagefetcher" | ||
) | ||
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const ( | ||
// WithRollbackOnError indicates a rollback should be performed on error. | ||
WithRollbackOnError RollbackBehavior = true | ||
// WithoutRollbackOnError indicates a rollback should not be performed on error. | ||
WithoutRollbackOnError RollbackBehavior = false | ||
) | ||
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// RollbackBehavior is a boolean flag that indicates whether a rollback should be performed. | ||
type RollbackBehavior bool | ||
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// Applier creates or updates cloud resources. | ||
type Applier struct { | ||
fileHandler file.Handler | ||
imageFetcher imageFetcher | ||
libvirtRunner libvirtRunner | ||
rawDownloader rawDownloader | ||
policyPatcher policyPatcher | ||
terraformClient tfResourceClient | ||
logLevel terraform.LogLevel | ||
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workingDir string | ||
backupDir string | ||
out io.Writer | ||
} | ||
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// NewApplier creates a new Applier. | ||
func NewApplier( | ||
ctx context.Context, out io.Writer, workingDir, backupDir string, | ||
logLevel terraform.LogLevel, fileHandler file.Handler, | ||
) (*Applier, func(), error) { | ||
tfClient, err := terraform.New(ctx, workingDir) | ||
if err != nil { | ||
return nil, nil, fmt.Errorf("setting up terraform client: %w", err) | ||
} | ||
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return &Applier{ | ||
fileHandler: fileHandler, | ||
imageFetcher: imagefetcher.New(), | ||
libvirtRunner: libvirt.New(), | ||
rawDownloader: imagefetcher.NewDownloader(), | ||
policyPatcher: NewAzurePolicyPatcher(), | ||
terraformClient: tfClient, | ||
logLevel: logLevel, | ||
workingDir: workingDir, | ||
backupDir: backupDir, | ||
out: out, | ||
}, tfClient.RemoveInstaller, nil | ||
} | ||
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// Plan plans the given configuration and prepares the Terraform workspace. | ||
func (a *Applier) Plan(ctx context.Context, conf *config.Config) (bool, error) { | ||
vars, err := a.terraformApplyVars(ctx, conf) | ||
if err != nil { | ||
return false, fmt.Errorf("creating terraform variables: %w", err) | ||
} | ||
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return planApply( | ||
ctx, a.terraformClient, a.fileHandler, a.out, a.logLevel, vars, | ||
filepath.Join(constants.TerraformEmbeddedDir, strings.ToLower(conf.GetProvider().String())), | ||
a.workingDir, | ||
filepath.Join(a.backupDir, constants.TerraformUpgradeBackupDir), | ||
) | ||
} | ||
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// Apply applies the prepared configuration by creating or updating cloud resources. | ||
func (a *Applier) Apply(ctx context.Context, csp cloudprovider.Provider, withRollback RollbackBehavior) (infra state.Infrastructure, retErr error) { | ||
if withRollback { | ||
var rollbacker rollbacker | ||
switch csp { | ||
case cloudprovider.QEMU: | ||
rollbacker = &rollbackerQEMU{client: a.terraformClient, libvirt: a.libvirtRunner} | ||
default: | ||
rollbacker = &rollbackerTerraform{client: a.terraformClient} | ||
} | ||
defer rollbackOnError(a.out, &retErr, rollbacker, a.logLevel) | ||
} | ||
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infraState, err := a.terraformClient.ApplyCluster(ctx, csp, a.logLevel) | ||
if err != nil { | ||
return infraState, fmt.Errorf("terraform apply: %w", err) | ||
} | ||
if csp == cloudprovider.Azure && infraState.Azure != nil { | ||
if err := a.policyPatcher.Patch(ctx, infraState.Azure.AttestationURL); err != nil { | ||
return infraState, fmt.Errorf("patching policies: %w", err) | ||
} | ||
} | ||
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return infraState, nil | ||
} | ||
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// RestoreWorkspace rolls back the existing workspace to the backup directory created when planning an action, | ||
// and the user decides to not apply it. | ||
// Note that this will not apply the restored state from the backup. | ||
func (a *Applier) RestoreWorkspace() error { | ||
return restoreBackup(a.fileHandler, a.workingDir, filepath.Join(a.backupDir, constants.TerraformUpgradeBackupDir)) | ||
} | ||
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func (a *Applier) terraformApplyVars(ctx context.Context, conf *config.Config) (terraform.Variables, error) { | ||
imageRef, err := a.imageFetcher.FetchReference( | ||
ctx, | ||
conf.GetProvider(), | ||
conf.GetAttestationConfig().GetVariant(), | ||
conf.Image, conf.GetRegion(), | ||
) | ||
if err != nil { | ||
return nil, fmt.Errorf("fetching image reference: %w", err) | ||
} | ||
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switch conf.GetProvider() { | ||
case cloudprovider.AWS: | ||
return awsTerraformVars(conf, imageRef), nil | ||
case cloudprovider.Azure: | ||
return azureTerraformVars(conf, imageRef), nil | ||
case cloudprovider.GCP: | ||
return gcpTerraformVars(conf, imageRef), nil | ||
case cloudprovider.OpenStack: | ||
return openStackTerraformVars(conf, imageRef) | ||
case cloudprovider.QEMU: | ||
return qemuTerraformVars(ctx, conf, imageRef, a.libvirtRunner, a.rawDownloader) | ||
default: | ||
return nil, fmt.Errorf("unsupported provider: %s", conf.GetProvider()) | ||
} | ||
} | ||
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// policyPatcher interacts with the CSP (currently only applies for Azure) to update the attestation policy. | ||
type policyPatcher interface { | ||
Patch(ctx context.Context, attestationURL string) error | ||
} |
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