/
actuator_delete.go
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/
actuator_delete.go
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// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package infrastructure
import (
"context"
"github.com/gardener/gardener/extensions/pkg/controller"
"github.com/gardener/gardener/extensions/pkg/terraformer"
"github.com/gardener/gardener/extensions/pkg/util"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/go-logr/logr"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/gardener/gardener-extension-provider-azure/pkg/apis/azure/helper"
azureclient "github.com/gardener/gardener-extension-provider-azure/pkg/azure/client"
"github.com/gardener/gardener-extension-provider-azure/pkg/internal"
"github.com/gardener/gardener-extension-provider-azure/pkg/internal/infrastructure"
)
var (
// NewAzureClientFactory initializes a new AzureClientFactory. Exposed for testing.
NewAzureClientFactory = newAzureClientFactory
)
func newAzureClientFactory(client client.Client) azureclient.Factory {
return azureclient.NewAzureClientFactory(client)
}
// Delete implements infrastructure.Actuator.
func (a *actuator) Delete(ctx context.Context, log logr.Logger, infra *extensionsv1alpha1.Infrastructure, cluster *controller.Cluster) error {
tf, err := internal.NewTerraformer(log, a.RESTConfig(), infrastructure.TerraformerPurpose, infra, a.disableProjectedTokenMount)
if err != nil {
return util.DetermineError(err, helper.KnownCodes)
}
// terraform pod from previous reconciliation might still be running, ensure they are gone before doing any operations
if err := tf.EnsureCleanedUp(ctx); err != nil {
return err
}
config, err := helper.InfrastructureConfigFromInfrastructure(infra)
if err != nil {
return err
}
azureClientFactory := NewAzureClientFactory(a.Client())
resourceGroupExists, err := infrastructure.IsShootResourceGroupAvailable(ctx, azureClientFactory, infra, config)
if err != nil {
if azureclient.IsAzureAPIUnauthorized(err) {
log.Error(err, "Failed to check resource group availability due to invalid credentials")
} else {
return util.DetermineError(err, helper.KnownCodes)
}
}
if !resourceGroupExists {
if !azureclient.IsAzureAPIUnauthorized(err) {
if err := infrastructure.DeleteNodeSubnetIfExists(ctx, azureClientFactory, infra, config); err != nil {
return util.DetermineError(err, helper.KnownCodes)
}
}
if err := tf.RemoveTerraformerFinalizerFromConfig(ctx); err != nil {
return err
}
return tf.CleanupConfiguration(ctx)
}
// If the Terraform state is empty then we can exit early as we didn't create anything. Though, we clean up potentially
// created configmaps/secrets related to the Terraformer.
stateIsEmpty := tf.IsStateEmpty(ctx)
if stateIsEmpty {
log.Info("exiting early as infrastructure state is empty - nothing to do")
return tf.CleanupConfiguration(ctx)
}
terraformFiles, err := infrastructure.RenderTerraformerTemplate(infra, config, cluster)
if err != nil {
return util.DetermineError(err, helper.KnownCodes)
}
return util.DetermineError(tf.
InitializeWith(ctx, terraformer.DefaultInitializer(a.Client(), terraformFiles.Main, terraformFiles.Variables, terraformFiles.TFVars, terraformer.StateConfigMapInitializerFunc(NoOpStateInitializer))).
SetEnvVars(internal.TerraformerEnvVars(infra.Spec.SecretRef)...).
Destroy(ctx), helper.KnownCodes)
}
// NoOpStateInitializer is a no-op StateConfigMapInitializerFunc.
func NoOpStateInitializer(ctx context.Context, c client.Client, namespace, name string, owner *metav1.OwnerReference) error {
return nil
}