forked from gardener-attic/gardener-extensions
/
infrastructure.go
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/
infrastructure.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"
"strings"
"github.com/gardener/gardener-extensions/controllers/provider-gcp/pkg/internal"
gcpclient "github.com/gardener/gardener-extensions/controllers/provider-gcp/pkg/internal/client"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"google.golang.org/api/compute/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// KubernetesFirewallNamePrefix is the name prefix that Kubernetes related firewall rules have.
const (
KubernetesFirewallNamePrefix string = "k8s"
routePrefix string = "shoot--"
)
// ListKubernetesFirewalls lists all firewalls that are in the given network and have the KubernetesFirewallNamePrefix.
func ListKubernetesFirewalls(ctx context.Context, client gcpclient.Interface, projectID, network string) ([]string, error) {
var names []string
err := client.Firewalls().List(projectID).Pages(ctx, func(list *compute.FirewallList) error {
for _, firewall := range list.Items {
if strings.HasSuffix(firewall.Network, network) && strings.HasPrefix(firewall.Name, KubernetesFirewallNamePrefix) {
names = append(names, firewall.Name)
}
}
return nil
})
if err != nil {
return nil, err
}
return names, nil
}
// ListKubernetesRoutes returns a list of all routes within the shoot network which have "shoot--" as prefix.
func ListKubernetesRoutes(ctx context.Context, client gcpclient.Interface, projectID, network string) ([]string, error) {
var routes []string
if err := client.Routes().List(projectID).Pages(ctx, func(page *compute.RouteList) error {
for _, route := range page.Items {
if strings.HasPrefix(route.Name, routePrefix) && strings.HasSuffix(route.Network, network) {
routes = append(routes, route.Name)
}
}
return nil
}); err != nil {
return nil, err
}
return routes, nil
}
// DeleteFirewalls deletes the firewalls with the given names in the given project.
//
// If a deletion fails, it immediately returns the error of that deletion.
func DeleteFirewalls(ctx context.Context, client gcpclient.Interface, projectID string, firewalls []string) error {
for _, firewall := range firewalls {
if _, err := client.Firewalls().Delete(projectID, firewall).Context(ctx).Do(); err != nil {
return err
}
}
return nil
}
// DeleteRoutes deletes the route entries with the given names in the given project.
//
// If a deletion fails, it immediately returns the error of that deletion.
func DeleteRoutes(ctx context.Context, client gcpclient.Interface, projectID string, routes []string) error {
for _, route := range routes {
if _, err := client.Routes().Delete(projectID, route).Context(ctx).Do(); err != nil {
return err
}
}
return nil
}
// CleanupKubernetesFirewalls lists all Kubernetes firewall rules and then deletes them one after another.
//
// If a deletion fails, this method returns immediately with the encountered error.
func CleanupKubernetesFirewalls(ctx context.Context, client gcpclient.Interface, projectID, network string) error {
firewallNames, err := ListKubernetesFirewalls(ctx, client, projectID, network)
if err != nil {
return err
}
return DeleteFirewalls(ctx, client, projectID, firewallNames)
}
// CleanupKubernetesRoutes lists all Kubernetes route rules and then deletes them one after another.
//
// If a deletion fails, this method returns immediately with the encountered error.
func CleanupKubernetesRoutes(ctx context.Context, client gcpclient.Interface, projectID, network string) error {
routeNames, err := ListKubernetesRoutes(ctx, client, projectID, network)
if err != nil {
return err
}
return DeleteRoutes(ctx, client, projectID, routeNames)
}
// GetServiceAccountFromInfrastructure retrieves the ServiceAccount from the Secret referenced in the given Infrastructure.
func GetServiceAccountFromInfrastructure(ctx context.Context, c client.Client, config *extensionsv1alpha1.Infrastructure) (*internal.ServiceAccount, error) {
return internal.GetServiceAccount(ctx, c, config.Spec.SecretRef)
}