/
utils.go
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/
utils.go
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// Copyright (c) 2018 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 common
import (
"context"
"errors"
"fmt"
"math/big"
"net"
"strings"
"time"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
"github.com/gardener/gardener/pkg/client/kubernetes"
"github.com/gardener/gardener/pkg/operation/botanist/component/logging"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
hvpav1alpha1 "github.com/gardener/hvpa-controller/api/v1alpha1"
admissionregistrationv1beta1 "k8s.io/api/admissionregistration/v1beta1"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
networkingv1 "k8s.io/api/networking/v1"
rbacv1 "k8s.io/api/rbac/v1"
schedulingv1 "k8s.io/api/scheduling/v1"
schedulingv1beta1 "k8s.io/api/scheduling/v1beta1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
autoscalingv1beta2 "k8s.io/autoscaler/vertical-pod-autoscaler/pkg/apis/autoscaling.k8s.io/v1beta2"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// GetSecretKeysWithPrefix returns a list of keys of the given map <m> which are prefixed with <kind>.
func GetSecretKeysWithPrefix(kind string, m map[string]*corev1.Secret) []string {
var result []string
for key := range m {
if strings.HasPrefix(key, kind) {
result = append(result, key)
}
}
return result
}
// FilterEntriesByPrefix returns a list of strings which begin with the given prefix.
func FilterEntriesByPrefix(prefix string, entries []string) []string {
var result []string
for _, entry := range entries {
if strings.HasPrefix(entry, prefix) {
result = append(result, entry)
}
}
return result
}
// ComputeOffsetIP parses the provided <subnet> and offsets with the value of <offset>.
// For example, <subnet> = 100.64.0.0/11 and <offset> = 10 the result would be 100.64.0.10
// IPv6 and IPv4 is supported.
func ComputeOffsetIP(subnet *net.IPNet, offset int64) (net.IP, error) {
if subnet == nil {
return nil, fmt.Errorf("subnet is nil")
}
isIPv6 := false
bytes := subnet.IP.To4()
if bytes == nil {
isIPv6 = true
bytes = subnet.IP.To16()
}
ip := net.IP(big.NewInt(0).Add(big.NewInt(0).SetBytes(bytes), big.NewInt(offset)).Bytes())
if !subnet.Contains(ip) {
return nil, fmt.Errorf("cannot compute IP with offset %d - subnet %q too small", offset, subnet)
}
// there is no broadcast address on IPv6
if isIPv6 {
return ip, nil
}
for i := range ip {
// IP address is not the same, so it's not the broadcast ip.
if ip[i] != ip[i]|^subnet.Mask[i] {
return ip.To4(), nil
}
}
return nil, fmt.Errorf("computed IPv4 address %q is broadcast for subnet %q", ip, subnet)
}
// GenerateAddonConfig returns the provided <values> in case <enabled> is true. Otherwise, nil is
// being returned.
func GenerateAddonConfig(values map[string]interface{}, enabled bool) map[string]interface{} {
v := map[string]interface{}{
"enabled": enabled,
}
if enabled {
for key, value := range values {
v[key] = value
}
}
return v
}
// DeleteHvpa delete all resources required for the HVPA in the given namespace.
func DeleteHvpa(ctx context.Context, k8sClient kubernetes.Interface, namespace string) error {
if k8sClient == nil {
return fmt.Errorf("require kubernetes client")
}
listOptions := metav1.ListOptions{
LabelSelector: fmt.Sprintf("%s=%s", v1beta1constants.GardenRole, v1beta1constants.GardenRoleHvpa),
}
// Delete all CRDs with label "gardener.cloud/role=hvpa"
// Workaround: Due to https://github.com/gardener/gardener/issues/2257, we first list the HVPA CRDs and then remove
// them one by one.
crdList, err := k8sClient.APIExtension().ApiextensionsV1beta1().CustomResourceDefinitions().List(ctx, listOptions)
if err != nil {
return err
}
for _, crd := range crdList.Items {
if err := k8sClient.APIExtension().ApiextensionsV1beta1().CustomResourceDefinitions().Delete(ctx, crd.Name, metav1.DeleteOptions{}); client.IgnoreNotFound(err) != nil {
return err
}
}
// Delete all Deployments with label "gardener.cloud/role=hvpa"
deletePropagation := metav1.DeletePropagationForeground
if err := k8sClient.Kubernetes().AppsV1().Deployments(namespace).DeleteCollection(ctx, metav1.DeleteOptions{PropagationPolicy: &deletePropagation}, listOptions); client.IgnoreNotFound(err) != nil {
return err
}
// Delete all ClusterRoles with label "gardener.cloud/role=hvpa"
if err := k8sClient.Kubernetes().RbacV1().ClusterRoles().DeleteCollection(ctx, metav1.DeleteOptions{}, listOptions); client.IgnoreNotFound(err) != nil {
return err
}
// Delete all ClusterRoleBindings with label "gardener.cloud/role=hvpa"
if err := k8sClient.Kubernetes().RbacV1().ClusterRoleBindings().DeleteCollection(ctx, metav1.DeleteOptions{}, listOptions); client.IgnoreNotFound(err) != nil {
return err
}
// Delete all ServiceAccounts with label "gardener.cloud/role=hvpa"
if err := k8sClient.Kubernetes().CoreV1().ServiceAccounts(namespace).DeleteCollection(ctx, metav1.DeleteOptions{}, listOptions); client.IgnoreNotFound(err) != nil {
return err
}
return nil
}
// DeleteVpa delete all resources required for the VPA in the given namespace.
func DeleteVpa(ctx context.Context, c client.Client, namespace string, isShoot bool) error {
resources := []client.Object{
&appsv1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: v1beta1constants.DeploymentNameVPAAdmissionController, Namespace: namespace}},
&appsv1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: v1beta1constants.DeploymentNameVPARecommender, Namespace: namespace}},
&appsv1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: v1beta1constants.DeploymentNameVPAUpdater, Namespace: namespace}},
&corev1.Service{ObjectMeta: metav1.ObjectMeta{Name: "vpa-webhook", Namespace: namespace}},
&autoscalingv1beta2.VerticalPodAutoscaler{ObjectMeta: metav1.ObjectMeta{Name: v1beta1constants.DeploymentNameVPAAdmissionController, Namespace: namespace}},
&autoscalingv1beta2.VerticalPodAutoscaler{ObjectMeta: metav1.ObjectMeta{Name: v1beta1constants.DeploymentNameVPARecommender, Namespace: namespace}},
&autoscalingv1beta2.VerticalPodAutoscaler{ObjectMeta: metav1.ObjectMeta{Name: v1beta1constants.DeploymentNameVPAUpdater, Namespace: namespace}},
}
if isShoot {
resources = append(resources,
&corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: "vpa-admission-controller", Namespace: namespace}},
&corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: "vpa-recommender", Namespace: namespace}},
&corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: VPASecretName, Namespace: namespace}},
&corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: "vpa-updater", Namespace: namespace}},
&networkingv1.NetworkPolicy{ObjectMeta: metav1.ObjectMeta{Name: "allow-kube-apiserver-to-vpa-admission-controller", Namespace: namespace}},
)
} else {
resources = append(resources,
&rbacv1.ClusterRole{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:actor"}},
&rbacv1.ClusterRole{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:admission-controller"}},
&rbacv1.ClusterRole{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:checkpoint-actor"}},
&rbacv1.ClusterRole{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:metrics-reader"}},
&rbacv1.ClusterRole{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:target-reader"}},
&rbacv1.ClusterRole{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:evictioner"}},
&rbacv1.ClusterRoleBinding{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:actor"}},
&rbacv1.ClusterRoleBinding{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:admission-controller"}},
&rbacv1.ClusterRoleBinding{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:checkpoint-actor"}},
&rbacv1.ClusterRoleBinding{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:metrics-reader"}},
&rbacv1.ClusterRoleBinding{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:target-reader"}},
&rbacv1.ClusterRoleBinding{ObjectMeta: metav1.ObjectMeta{Name: "gardener.cloud:vpa:seed:evictioner"}},
&corev1.ServiceAccount{ObjectMeta: metav1.ObjectMeta{Name: "vpa-admission-controller", Namespace: namespace}},
&corev1.ServiceAccount{ObjectMeta: metav1.ObjectMeta{Name: "vpa-recommender", Namespace: namespace}},
&corev1.ServiceAccount{ObjectMeta: metav1.ObjectMeta{Name: "vpa-updater", Namespace: namespace}},
&admissionregistrationv1beta1.MutatingWebhookConfiguration{ObjectMeta: metav1.ObjectMeta{Name: "vpa-webhook-config-seed"}},
)
}
for _, resource := range resources {
if err := c.Delete(ctx, resource); client.IgnoreNotFound(err) != nil {
return err
}
}
return nil
}
// DeleteShootLoggingStack deletes all shoot resource of the logging stack in the given namespace.
func DeleteShootLoggingStack(ctx context.Context, k8sClient client.Client, namespace string) error {
if err := DeleteLoki(ctx, k8sClient, namespace); err != nil {
return err
}
return DeleteShootNodeLoggingStack(ctx, k8sClient, namespace)
}
// DeleteLoki deletes all resources of the Loki in a given namespace.
func DeleteLoki(ctx context.Context, k8sClient client.Client, namespace string) error {
resources := []client.Object{
&networkingv1.NetworkPolicy{ObjectMeta: metav1.ObjectMeta{Name: "allow-loki", Namespace: namespace}},
&networkingv1.NetworkPolicy{ObjectMeta: metav1.ObjectMeta{Name: "allow-to-loki", Namespace: namespace}},
&hvpav1alpha1.Hvpa{ObjectMeta: metav1.ObjectMeta{Name: "loki", Namespace: namespace}},
&corev1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Name: "loki-config", Namespace: namespace}},
&corev1.Service{ObjectMeta: metav1.ObjectMeta{Name: "loki", Namespace: namespace}},
&corev1.ServiceAccount{ObjectMeta: metav1.ObjectMeta{Name: "loki", Namespace: namespace}},
&appsv1.StatefulSet{ObjectMeta: metav1.ObjectMeta{Name: "loki", Namespace: namespace}},
&corev1.PersistentVolumeClaim{ObjectMeta: metav1.ObjectMeta{Name: "loki-loki-0", Namespace: namespace}},
}
return kutil.DeleteObjects(ctx, k8sClient, resources...)
}
// DeleteShootNodeLoggingStack deletes all shoot resource of the shoot-node logging stack in the given namespace.
func DeleteShootNodeLoggingStack(ctx context.Context, k8sClient client.Client, namespace string) error {
resources := []client.Object{
&extensionsv1beta1.Ingress{ObjectMeta: metav1.ObjectMeta{Name: "loki", Namespace: namespace}},
&corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: logging.SecretNameLokiKubeRBACProxyKubeconfig, Namespace: namespace}},
&corev1.Secret{ObjectMeta: metav1.ObjectMeta{Name: LokiTLS, Namespace: namespace}},
&networkingv1.NetworkPolicy{ObjectMeta: metav1.ObjectMeta{Name: "allow-from-prometheus-to-loki-telegraf", Namespace: namespace}},
&corev1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Name: "telegraf-config", Namespace: namespace}},
}
return kutil.DeleteObjects(ctx, k8sClient, resources...)
}
// DeleteSeedLoggingStack deletes all seed resource of the logging stack in the garden namespace.
func DeleteSeedLoggingStack(ctx context.Context, k8sClient client.Client) error {
resources := []client.Object{
&corev1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Name: "fluent-bit-config", Namespace: v1beta1constants.GardenNamespace}},
&appsv1.DaemonSet{ObjectMeta: metav1.ObjectMeta{Name: "fluent-bit", Namespace: v1beta1constants.GardenNamespace}},
&networkingv1.NetworkPolicy{ObjectMeta: metav1.ObjectMeta{Name: "allow-fluentbit", Namespace: v1beta1constants.GardenNamespace}},
&schedulingv1.PriorityClass{ObjectMeta: metav1.ObjectMeta{Name: "fluent-bit"}},
&schedulingv1.PriorityClass{ObjectMeta: metav1.ObjectMeta{Name: "loki"}},
&schedulingv1.PriorityClass{ObjectMeta: metav1.ObjectMeta{Name: GardenLokiPriorityClassName}},
&rbacv1.ClusterRole{ObjectMeta: metav1.ObjectMeta{Name: "fluent-bit-read"}},
&rbacv1.ClusterRoleBinding{ObjectMeta: metav1.ObjectMeta{Name: "fluent-bit-read"}},
&corev1.ServiceAccount{ObjectMeta: metav1.ObjectMeta{Name: "fluent-bit", Namespace: v1beta1constants.GardenNamespace}},
&corev1.Service{ObjectMeta: metav1.ObjectMeta{Name: "fluent-bit", Namespace: v1beta1constants.GardenNamespace}},
}
if err := kutil.DeleteObjects(ctx, k8sClient, resources...); err != nil {
return err
}
return DeleteLoki(ctx, k8sClient, v1beta1constants.GardenNamespace)
}
// DeleteReserveExcessCapacity deletes the deployment and priority class for excess capacity
func DeleteReserveExcessCapacity(ctx context.Context, k8sClient client.Client) error {
if k8sClient == nil {
return errors.New("must provide non-nil kubernetes client to common.DeleteReserveExcessCapacity")
}
deploy := &appsv1.Deployment{
ObjectMeta: metav1.ObjectMeta{
Name: "reserve-excess-capacity",
Namespace: v1beta1constants.GardenNamespace,
},
}
if err := k8sClient.Delete(ctx, deploy); client.IgnoreNotFound(err) != nil {
return err
}
priorityClass := &schedulingv1beta1.PriorityClass{
ObjectMeta: metav1.ObjectMeta{
Name: "gardener-reserve-excess-capacity",
},
}
return client.IgnoreNotFound(k8sClient.Delete(ctx, priorityClass))
}
// DeleteAlertmanager deletes all resources of the Alertmanager in a given namespace.
func DeleteAlertmanager(ctx context.Context, k8sClient client.Client, namespace string) error {
objs := []client.Object{
&appsv1.StatefulSet{
ObjectMeta: metav1.ObjectMeta{
Name: v1beta1constants.StatefulSetNameAlertManager,
Namespace: namespace,
},
},
&extensionsv1beta1.Ingress{
ObjectMeta: metav1.ObjectMeta{
Name: "alertmanager",
Namespace: namespace,
},
},
&corev1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "alertmanager-client",
Namespace: namespace,
},
},
&corev1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: "alertmanager",
Namespace: namespace,
},
},
&corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: "alertmanager-basic-auth",
Namespace: namespace,
},
},
&corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: AlertManagerTLS,
Namespace: namespace,
},
},
&corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: "alertmanager-config",
Namespace: namespace,
},
},
&corev1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
Name: "alertmanager-db-alertmanager-0",
Namespace: namespace,
},
},
}
return kutil.DeleteObjects(ctx, k8sClient, objs...)
}
// DeleteGrafanaByRole deletes the monitoring stack for the shoot owner.
func DeleteGrafanaByRole(ctx context.Context, k8sClient kubernetes.Interface, namespace, role string) error {
if k8sClient == nil {
return fmt.Errorf("require kubernetes client")
}
listOptions := metav1.ListOptions{
LabelSelector: fmt.Sprintf("%s=%s,%s=%s", "component", "grafana", "role", role),
}
deletePropagation := metav1.DeletePropagationForeground
if err := k8sClient.Kubernetes().AppsV1().Deployments(namespace).DeleteCollection(
ctx,
metav1.DeleteOptions{
PropagationPolicy: &deletePropagation,
}, listOptions); err != nil && !apierrors.IsNotFound(err) {
return err
}
if err := k8sClient.Kubernetes().CoreV1().ConfigMaps(namespace).DeleteCollection(
ctx, metav1.DeleteOptions{}, listOptions); err != nil && !apierrors.IsNotFound(err) {
return err
}
if err := k8sClient.Kubernetes().ExtensionsV1beta1().Ingresses(namespace).DeleteCollection(
ctx, metav1.DeleteOptions{}, listOptions); err != nil && !apierrors.IsNotFound(err) {
return err
}
if err := k8sClient.Kubernetes().CoreV1().Secrets(namespace).DeleteCollection(
ctx, metav1.DeleteOptions{}, listOptions); err != nil && !apierrors.IsNotFound(err) {
return err
}
if err := k8sClient.Kubernetes().CoreV1().Services(namespace).Delete(
ctx, fmt.Sprintf("grafana-%s", role), metav1.DeleteOptions{}); err != nil && !apierrors.IsNotFound(err) {
return err
}
return nil
}
// ReadServiceAccountSigningKeySecret reads the signing key secret to extract the signing key.
// It errors if there is no value at ServiceAccountSigningKeySecretDataKey.
func ReadServiceAccountSigningKeySecret(secret *corev1.Secret) (string, error) {
data, ok := secret.Data[ServiceAccountSigningKeySecretDataKey]
if !ok {
return "", fmt.Errorf("no signing key secret in secret %s/%s at .Data.%s", secret.Namespace, secret.Name, ServiceAccountSigningKeySecretDataKey)
}
return string(data), nil
}
// GetServiceAccountSigningKeySecret gets the signing key from the secret with the given name and namespace.
func GetServiceAccountSigningKeySecret(ctx context.Context, c client.Client, shootNamespace, secretName string) (string, error) {
secret := &corev1.Secret{}
if err := c.Get(ctx, kutil.Key(shootNamespace, secretName), secret); err != nil {
return "", err
}
return ReadServiceAccountSigningKeySecret(secret)
}
// DeleteDeploymentsHavingDeprecatedRoleLabelKey deletes the Deployments with the passed object keys if
// the corresponding Deployment .spec.selector contains the deprecated "garden.sapcloud.io/role" label key.
func DeleteDeploymentsHavingDeprecatedRoleLabelKey(ctx context.Context, c client.Client, keys []client.ObjectKey) error {
for _, key := range keys {
deployment := &appsv1.Deployment{}
if err := c.Get(ctx, key, deployment); err != nil {
if apierrors.IsNotFound(err) {
continue
}
return err
}
if _, ok := deployment.Spec.Selector.MatchLabels[v1beta1constants.DeprecatedGardenRole]; ok {
if err := c.Delete(ctx, deployment); client.IgnoreNotFound(err) != nil {
return err
}
if err := kutil.WaitUntilResourceDeleted(ctx, c, deployment, 2*time.Second); err != nil {
return err
}
}
}
return nil
}