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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/Azure/go-autorest/autorest/to"
"github.com/gardener/gardener/extensions/pkg/controller"
"github.com/gardener/gardener/extensions/pkg/util"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
ctrlerror "github.com/gardener/gardener/pkg/controllerutils/reconciler"
"github.com/go-logr/logr"
"github.com/gardener/gardener-extension-provider-azure/pkg/apis/azure"
"github.com/gardener/gardener-extension-provider-azure/pkg/apis/azure/helper"
azureclient "github.com/gardener/gardener-extension-provider-azure/pkg/azure/client"
)
func (a *actuator) Delete(ctx context.Context, log logr.Logger, bastion *extensionsv1alpha1.Bastion, cluster *controller.Cluster) error {
infrastructureStatus, err := getInfrastructureStatus(ctx, a, cluster)
if err != nil {
return err
}
opt, err := DetermineOptions(bastion, cluster, infrastructureStatus.ResourceGroup.Name)
if err != nil {
return err
}
cloudProfile, err := helper.CloudProfileConfigFromCluster(cluster)
if err != nil {
return err
}
var cloudConfiguration *azure.CloudConfiguration
if cloudProfile != nil {
cloudConfiguration = cloudProfile.CloudConfiguration
}
azCloudConfiguration, err := azureclient.AzureCloudConfigurationFromCloudConfiguration(cloudConfiguration)
if err != nil {
return err
}
factory, err := azureclient.NewAzureClientFactoryFromSecret(
ctx,
a.client,
opt.SecretReference,
false,
azureclient.WithCloudConfiguration(azCloudConfiguration),
)
if err != nil {
return err
}
err = removeBastionInstance(ctx, log, factory, opt)
if err != nil {
return util.DetermineError(fmt.Errorf("failed to remove bastion instance: %w", err), helper.KnownCodes)
}
deleted, err := isInstanceDeleted(ctx, log, factory, opt)
if err != nil {
return util.DetermineError(fmt.Errorf("failed to check for bastion instance: %w", err), helper.KnownCodes)
}
if !deleted {
return &ctrlerror.RequeueAfterError{
RequeueAfter: 10 * time.Second,
Cause: errors.New("bastion instance is still deleting"),
}
}
err = removeNic(ctx, log, factory, opt)
if err != nil {
return util.DetermineError(fmt.Errorf("failed to remove nic: %w", err), helper.KnownCodes)
}
err = removePublicIP(ctx, log, factory, opt)
if err != nil {
return util.DetermineError(fmt.Errorf("failed to remove public ip: %w", err), helper.KnownCodes)
}
err = removeDisk(ctx, log, factory, opt)
if err != nil {
return util.DetermineError(fmt.Errorf("failed to remove disk: %w", err), helper.KnownCodes)
}
err = removeNSGRule(ctx, log, factory, opt)
if err != nil {
return util.DetermineError(fmt.Errorf("failed to remove nsg rules: %w", err), helper.KnownCodes)
}
return nil
}
func (a *actuator) ForceDelete(_ context.Context, _ logr.Logger, _ *extensionsv1alpha1.Bastion, _ *controller.Cluster) error {
return nil
}
func removeNSGRule(ctx context.Context, log logr.Logger, factory azureclient.Factory, opt *Options) error {
securityGroupResp, err := getNetworkSecurityGroup(ctx, log, factory, opt)
if err != nil {
return err
}
rules := []string{
NSGIngressAllowSSHResourceNameIPv4(opt.BastionInstanceName),
NSGIngressAllowSSHResourceNameIPv6(opt.BastionInstanceName),
NSGEgressDenyAllResourceName(opt.BastionInstanceName),
NSGEgressAllowOnlyResourceName(opt.BastionInstanceName),
}
modifiedRules, rulesWereDeleted := deleteSecurityRuleDefinitionsByName(securityGroupResp.Properties.SecurityRules, rules...)
securityGroupResp.Properties.SecurityRules = modifiedRules
if !rulesWereDeleted {
return nil
}
err = createOrUpdateNetworkSecGroup(ctx, factory, opt, securityGroupResp)
if err != nil {
return err
}
log.Info("bastion network security group rules removed: ", "rules", rules)
return nil
}
func removePublicIP(ctx context.Context, log logr.Logger, factory azureclient.Factory, opt *Options) error {
publicClient, err := factory.PublicIP()
if err != nil {
return err
}
err = publicClient.Delete(ctx, opt.ResourceGroupName, opt.BastionPublicIPName)
if err != nil {
return fmt.Errorf("failed to delete Public IP: %w", err)
}
log.Info("Public IP removed", "ip", opt.BastionPublicIPName)
return nil
}
func removeNic(ctx context.Context, log logr.Logger, factory azureclient.Factory, opt *Options) error {
nicClient, err := factory.NetworkInterface()
if err != nil {
return err
}
err = nicClient.Delete(ctx, opt.ResourceGroupName, opt.NicName)
if err != nil {
return fmt.Errorf("failed to delete Nic: %w", err)
}
log.Info("Nic removed", "nic", opt.NicName)
return nil
}
func removeDisk(ctx context.Context, log logr.Logger, factory azureclient.Factory, opt *Options) error {
diskClient, err := factory.Disk()
if err != nil {
return err
}
err = diskClient.Delete(ctx, opt.ResourceGroupName, opt.DiskName)
if err != nil {
return fmt.Errorf("failed to delete disk: %w", err)
}
log.Info("Disk removed", "disk", opt.DiskName)
return nil
}
func removeBastionInstance(ctx context.Context, log logr.Logger, factory azureclient.Factory, opt *Options) error {
vmClient, err := factory.VirtualMachine()
if err != nil {
return err
}
if err = vmClient.Delete(ctx, opt.ResourceGroupName, opt.BastionInstanceName, to.BoolPtr(false)); err != nil {
return fmt.Errorf("failed to terminate bastion instance: %w", err)
}
log.Info("Instance removed", "instance", opt.BastionInstanceName)
return nil
}
func isInstanceDeleted(ctx context.Context, log logr.Logger, factory azureclient.Factory, opt *Options) (bool, error) {
instance, err := getBastionInstance(ctx, log, factory, opt)
if err != nil {
return false, err
}
return instance == nil, nil
}