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actuator_delete.go
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/
actuator_delete.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package bastion
import (
"context"
"errors"
"fmt"
"time"
"github.com/gardener/gardener/extensions/pkg/controller"
"github.com/gardener/gardener/extensions/pkg/util"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
reconcilerutils "github.com/gardener/gardener/pkg/controllerutils/reconciler"
"github.com/go-logr/logr"
"github.com/gardener/gardener-extension-provider-gcp/pkg/apis/gcp/helper"
gcpclient "github.com/gardener/gardener-extension-provider-gcp/pkg/internal/client"
)
func (a *actuator) Delete(ctx context.Context, log logr.Logger, bastion *extensionsv1alpha1.Bastion, cluster *controller.Cluster) error {
serviceAccount, err := getServiceAccount(ctx, a.client, bastion)
if err != nil {
return fmt.Errorf("failed to get service account: %w", err)
}
gcpClient, err := createGCPClient(ctx, serviceAccount)
if err != nil {
return util.DetermineError(fmt.Errorf("failed to create GCP client: %w", err), helper.KnownCodes)
}
infrastructureStatus, subnet, err := getInfrastructureStatus(ctx, a.client, cluster)
if err != nil {
return err
}
opt, err := DetermineOptions(bastion, cluster, serviceAccount.ProjectID, infrastructureStatus.Networks.VPC.Name, subnet)
if err != nil {
return fmt.Errorf("failed to determine Options: %w", err)
}
if opt.Zone == "" {
opt.Zone, err = getDefaultGCPZone(ctx, gcpClient, opt, cluster.Shoot.Spec.Region)
if err != nil {
return util.DetermineError(err, helper.KnownCodes)
}
}
if err := removeBastionInstance(ctx, log, gcpClient, opt); err != nil {
return util.DetermineError(fmt.Errorf("failed to remove bastion instance: %w", err), helper.KnownCodes)
}
deleted, err := isInstanceDeleted(ctx, gcpClient, opt)
if err != nil {
return util.DetermineError(fmt.Errorf("failed to check for bastion instance: %w", err), helper.KnownCodes)
}
if !deleted {
return &reconcilerutils.RequeueAfterError{
RequeueAfter: 30 * time.Second,
Cause: errors.New("bastion instance is still deleting"),
}
}
if err := removeDisk(ctx, log, gcpClient, opt); err != nil {
return util.DetermineError(fmt.Errorf("failed to remove disk: %w", err), helper.KnownCodes)
}
if err := removeFirewallRules(ctx, log, gcpClient, opt); err != nil {
return util.DetermineError(fmt.Errorf("failed to remove firewall rule: %w", err), helper.KnownCodes)
}
return nil
}
func removeFirewallRules(ctx context.Context, log logr.Logger, gcpclient gcpclient.Interface, opt *Options) error {
firewallList := []string{FirewallIngressAllowSSHResourceName(opt.BastionInstanceName), FirewallEgressDenyAllResourceName(opt.BastionInstanceName), FirewallEgressAllowOnlyResourceName(opt.BastionInstanceName)}
for _, firewall := range firewallList {
if err := deleteFirewallRule(ctx, log, gcpclient, opt, firewall); err != nil {
return err
}
}
return nil
}
func removeBastionInstance(ctx context.Context, logger logr.Logger, gcpclient gcpclient.Interface, opt *Options) error {
instance, err := getBastionInstance(ctx, gcpclient, opt)
if err != nil {
return err
}
if instance == nil {
return nil
}
if _, err := gcpclient.Instances().Delete(opt.ProjectID, opt.Zone, opt.BastionInstanceName).Context(ctx).Do(); err != nil {
return fmt.Errorf("failed to terminate bastion instance: %w", err)
}
logger.Info("Instance removed", "instance", opt.BastionInstanceName)
return nil
}
func isInstanceDeleted(ctx context.Context, gcpclient gcpclient.Interface, opt *Options) (bool, error) {
instance, err := getBastionInstance(ctx, gcpclient, opt)
if err != nil {
return false, err
}
return instance == nil, nil
}
func removeDisk(ctx context.Context, logger logr.Logger, gcpclient gcpclient.Interface, opt *Options) error {
disk, err := getDisk(ctx, gcpclient, opt)
if err != nil {
return err
}
if disk == nil {
return nil
}
if _, err := gcpclient.Disks().Delete(opt.ProjectID, opt.Zone, opt.DiskName).Context(ctx).Do(); err != nil {
return fmt.Errorf("failed to delete disk: %w", err)
}
logger.Info("Disk removed", "disk", opt.DiskName)
return nil
}
func (a *actuator) ForceDelete(_ context.Context, _ logr.Logger, _ *extensionsv1alpha1.Bastion, _ *controller.Cluster) error {
return nil
}