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core.go
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core.go
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package apply
import (
"context"
"crypto/tls"
"encoding/json"
"fmt"
"reflect"
"time"
"github.com/openshift/library-go/pkg/operator/resource/resourcemerge"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/equality"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
typedv1 "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/util/workqueue"
"kubevirt.io/client-go/log"
"kubevirt.io/kubevirt/pkg/certificates/triple/cert"
"kubevirt.io/kubevirt/pkg/controller"
"kubevirt.io/kubevirt/pkg/virt-operator/resource/generate/components"
"kubevirt.io/kubevirt/pkg/virt-operator/util"
)
func (r *Reconciler) syncKubevirtNamespaceLabels() error {
targetNamespace := r.kv.ObjectMeta.Namespace
obj, exists, err := r.stores.NamespaceCache.GetByKey(targetNamespace)
if err != nil {
log.Log.Errorf("Failed to retrieve kubevirt namespace from store. Error: %s", err.Error())
return err
}
if !exists {
return fmt.Errorf("Could not find namespace in store. Namespace key: %s", targetNamespace)
}
cachedNamespace := obj.(*corev1.Namespace)
// Prepare namespace metadata patch
targetLabels := map[string]string{
"openshift.io/cluster-monitoring": "true",
}
cachedLabels := cachedNamespace.ObjectMeta.Labels
labelsToPatch := make(map[string]string)
for targetLabelKey, targetLabelValue := range targetLabels {
cachedLabelValue, ok := cachedLabels[targetLabelKey]
if ok && cachedLabelValue == targetLabelValue {
continue
}
labelsToPatch[targetLabelKey] = targetLabelValue
}
if len(labelsToPatch) == 0 {
log.Log.Infof("Kubevirt namespace (%s) labels are in sync", targetNamespace)
return nil
}
labelsPatch, err := json.Marshal(labelsToPatch)
if err != nil {
log.Log.Errorf("Failed to marshal namespace labels: %s", err.Error())
return err
}
log.Log.Infof("Patching namespace %s with %s", targetNamespace, labelsPatch)
_, err = r.clientset.CoreV1().Namespaces().Patch(context.Background(),
targetNamespace,
types.MergePatchType,
[]byte(fmt.Sprintf(`{"metadata":{"labels": %s}}`, labelsPatch)),
metav1.PatchOptions{},
)
if err != nil {
log.Log.Errorf("Could not patch kubevirt namespace labels: %s", err.Error())
return err
}
log.Log.Infof("kubevirt namespace labels patched")
return nil
}
func (r *Reconciler) createOrUpdateServices() (bool, error) {
for _, service := range r.targetStrategy.Services() {
pending, err := r.createOrUpdateService(service.DeepCopy())
if pending || err != nil {
return pending, err
}
}
return false, nil
}
func (r *Reconciler) createOrUpdateService(service *corev1.Service) (bool, error) {
core := r.clientset.CoreV1()
version, imageRegistry, id := getTargetVersionRegistryID(r.kv)
injectOperatorMetadata(r.kv, &service.ObjectMeta, version, imageRegistry, id, true)
obj, exists, _ := r.stores.ServiceCache.Get(service)
if !exists {
r.expectations.Service.RaiseExpectations(r.kvKey, 1, 0)
_, err := core.Services(service.Namespace).Create(context.Background(), service, metav1.CreateOptions{})
if err != nil {
r.expectations.Service.LowerExpectations(r.kvKey, 1, 0)
return false, fmt.Errorf("unable to create service %+v: %v", service, err)
}
return false, nil
}
cachedService := obj.(*corev1.Service)
deleteAndReplace := hasImmutableFieldChanged(service, cachedService)
if deleteAndReplace {
err := deleteService(cachedService, r.kvKey, r.expectations, core)
if err != nil {
return false, err
}
// waiting for old service to be deleted,
// after which the operator will recreate using new spec
return true, nil
}
patchOps, err := generateServicePatch(cachedService, service)
if err != nil {
return false, fmt.Errorf("unable to generate service endpoint patch operations for %+v: %v", service, err)
}
if len(patchOps) == 0 {
log.Log.V(4).Infof("service %v is up-to-date", service.GetName())
return false, nil
}
_, err = core.Services(service.Namespace).Patch(context.Background(), service.Name, types.JSONPatchType, generatePatchBytes(patchOps), metav1.PatchOptions{})
if err != nil {
return false, fmt.Errorf("unable to patch service %+v: %v", service, err)
}
log.Log.V(2).Infof("service %v patched", service.GetName())
return false, nil
}
func (r *Reconciler) getSecret(secret *corev1.Secret) (*corev1.Secret, bool, error) {
obj, exists, _ := r.stores.SecretCache.Get(secret)
if exists {
return obj.(*corev1.Secret), exists, nil
}
cachedSecret, err := r.clientset.CoreV1().Secrets(secret.Namespace).Get(context.Background(), secret.Name, metav1.GetOptions{})
if err != nil {
if errors.IsNotFound(err) {
return nil, false, nil
}
return nil, false, err
}
return cachedSecret, true, nil
}
func certificationNeedsRotation(secret *corev1.Secret, duration *metav1.Duration, ca *tls.Certificate, renewBefore *metav1.Duration, caRenewBefore *metav1.Duration) bool {
crt, err := components.LoadCertificates(secret)
if err != nil {
log.DefaultLogger().Reason(err).Infof("Failed to load certificate from secret %s, will rotate it.", secret.Name)
return true
}
if secret.Annotations["kubevirt.io/duration"] != duration.String() {
return true
}
rotationTime := components.NextRotationDeadline(crt, ca, renewBefore, caRenewBefore)
// We update the certificate if it has passed its renewal timeout
if rotationTime.Before(time.Now()) {
return true
}
return false
}
func deleteService(service *corev1.Service, kvKey string, expectations *util.Expectations, core typedv1.CoreV1Interface) error {
if service.DeletionTimestamp != nil {
return nil
}
key, err := controller.KeyFunc(service)
if err != nil {
return err
}
gracePeriod := int64(0)
deleteOptions := metav1.DeleteOptions{
GracePeriodSeconds: &gracePeriod,
}
expectations.Service.AddExpectedDeletion(kvKey, key)
err = core.Services(service.Namespace).Delete(context.Background(), service.Name, deleteOptions)
if err != nil {
expectations.Service.DeletionObserved(kvKey, key)
log.Log.Errorf("Failed to delete service %+v: %v", service, err)
return err
}
log.Log.V(2).Infof("service %v deleted. It must be re-created", service.GetName())
return nil
}
func (r *Reconciler) createOrUpdateCertificateSecret(queue workqueue.RateLimitingInterface, ca *tls.Certificate, secret *corev1.Secret, duration *metav1.Duration, renewBefore *metav1.Duration, caRenewBefore *metav1.Duration) (*tls.Certificate, error) {
var cachedSecret *corev1.Secret
var err error
secret = secret.DeepCopy()
version, imageRegistry, id := getTargetVersionRegistryID(r.kv)
injectOperatorMetadata(r.kv, &secret.ObjectMeta, version, imageRegistry, id, true)
log.DefaultLogger().V(4).Infof("checking certificate %v", secret.Name)
cachedSecret, exists, err := r.getSecret(secret)
if err != nil {
return nil, err
}
rotateCertificate := false
if exists {
rotateCertificate = certificationNeedsRotation(cachedSecret, duration, ca, renewBefore, caRenewBefore)
}
// populate the secret with correct certificate
if !exists || rotateCertificate {
if err := components.PopulateSecretWithCertificate(secret, ca, duration); err != nil {
return nil, err
}
} else if exists {
secret.Data = cachedSecret.Data
}
crt, err := components.LoadCertificates(secret)
if err != nil {
log.DefaultLogger().Reason(err).Infof("Failed to load certificate from secret %s.", secret.Name)
return nil, err
}
// we need to ensure that we revisit certificates before they expire
wakeupDeadline := components.NextRotationDeadline(crt, ca, renewBefore, caRenewBefore).Sub(time.Now())
queue.AddAfter(r.kvKey, wakeupDeadline)
if !exists {
r.expectations.Secrets.RaiseExpectations(r.kvKey, 1, 0)
_, err := r.clientset.CoreV1().Secrets(secret.Namespace).Create(context.Background(), secret, metav1.CreateOptions{})
if err != nil {
r.expectations.Secrets.LowerExpectations(r.kvKey, 1, 0)
return nil, fmt.Errorf("unable to create secret %+v: %v", secret, err)
}
return crt, nil
}
modified := resourcemerge.BoolPtr(false)
resourcemerge.EnsureObjectMeta(modified, &cachedSecret.ObjectMeta, secret.ObjectMeta)
if !*modified && !rotateCertificate {
log.Log.V(4).Infof("secret %v is up-to-date", secret.GetName())
return crt, nil
}
ops, err := createSecretPatch(secret)
if err != nil {
return nil, err
}
_, err = r.clientset.CoreV1().Secrets(secret.Namespace).Patch(context.Background(), secret.Name, types.JSONPatchType, generatePatchBytes(ops), metav1.PatchOptions{})
if err != nil {
return nil, fmt.Errorf("unable to patch secret %+v: %v", secret, err)
}
log.Log.V(2).Infof("secret %v updated", secret.GetName())
return crt, nil
}
func createSecretPatch(secret *corev1.Secret) ([]string, error) {
// Add Spec Patch
data, err := json.Marshal(secret.Data)
if err != nil {
return nil, err
}
// Patch if old version
var ops []string
// Add Labels and Annotations Patches
labelAnnotationPatch, err := createLabelsAndAnnotationsPatch(&secret.ObjectMeta)
if err != nil {
return nil, err
}
ops = append(ops, labelAnnotationPatch...)
ops = append(ops, fmt.Sprintf(`{ "op": "replace", "path": "/data", "value": %s }`, string(data)))
return ops, nil
}
func (r *Reconciler) createOrUpdateCertificateSecrets(queue workqueue.RateLimitingInterface, caCert *tls.Certificate, duration *metav1.Duration, renewBefore *metav1.Duration, caRenewBefore *metav1.Duration) error {
for _, secret := range r.targetStrategy.CertificateSecrets() {
// The CA certificate needs to be handled separately and before other secrets
if secret.Name == components.KubeVirtCASecretName {
continue
}
_, err := r.createOrUpdateCertificateSecret(queue, caCert, secret, duration, renewBefore, caRenewBefore)
if err != nil {
return err
}
}
return nil
}
func (r *Reconciler) createOrUpdateComponentsWithCertificates(queue workqueue.RateLimitingInterface) error {
caDuration := GetCADuration(r.kv.Spec.CertificateRotationStrategy.SelfSigned)
caRenewBefore := GetCARenewBefore(r.kv.Spec.CertificateRotationStrategy.SelfSigned)
certDuration := GetCertDuration(r.kv.Spec.CertificateRotationStrategy.SelfSigned)
certRenewBefore := GetCertRenewBefore(r.kv.Spec.CertificateRotationStrategy.SelfSigned)
// create/update CA Certificate secret
caCert, err := r.createOrUpdateCACertificateSecret(queue, caDuration, caRenewBefore)
if err != nil {
return err
}
// create/update CA config map
caBundle, err := r.createOrUpdateKubeVirtCAConfigMap(queue, caCert, caRenewBefore, findRequiredCAConfigMap(r.targetStrategy.ConfigMaps()))
if err != nil {
return err
}
// create/update ValidatingWebhookConfiguration
err = r.createOrUpdateValidatingWebhookConfigurations(caBundle)
if err != nil {
return err
}
// create/update MutatingWebhookConfiguration
err = r.createOrUpdateMutatingWebhookConfigurations(caBundle)
if err != nil {
return err
}
// create/update APIServices
err = r.createOrUpdateAPIServices(caBundle)
if err != nil {
return err
}
// create/update Certificate secrets
err = r.createOrUpdateCertificateSecrets(queue, caCert, certDuration, certRenewBefore, caRenewBefore)
if err != nil {
return err
}
return nil
}
func shouldEnforceClusterIP(desired, current string) bool {
if desired == "" {
return false
}
return desired != current
}
func getObjectMetaPatch(desired, current metav1.ObjectMeta) ([]string, error) {
modified := resourcemerge.BoolPtr(false)
existingCopy := current.DeepCopy()
resourcemerge.EnsureObjectMeta(modified, existingCopy, desired)
labelAnnotationPatch := []string{}
var err error
if *modified {
// labels and/or annotations modified add patch
labelAnnotationPatch, err = createLabelsAndAnnotationsPatch(&desired)
if err != nil {
return labelAnnotationPatch, err
}
}
return labelAnnotationPatch, nil
}
func hasImmutableFieldChanged(service, cachedService *corev1.Service) bool {
deleteAndReplace := false
typeSame := isServiceClusterIP(cachedService) && isServiceClusterIP(service)
if !typeSame || shouldEnforceClusterIP(service.Spec.ClusterIP, cachedService.Spec.ClusterIP) {
deleteAndReplace = true
}
return deleteAndReplace
}
func generateServicePatch(
cachedService *corev1.Service,
service *corev1.Service) ([]string, error) {
patchOps, err := getObjectMetaPatch(service.ObjectMeta, cachedService.ObjectMeta)
if err != nil {
return patchOps, err
}
// set these values in the case they are empty
service.Spec.ClusterIP = cachedService.Spec.ClusterIP
service.Spec.Type = cachedService.Spec.Type
if service.Spec.SessionAffinity == "" {
service.Spec.SessionAffinity = cachedService.Spec.SessionAffinity
}
// If the Specs don't equal each other, replace it
if !equality.Semantic.DeepEqual(cachedService.Spec, service.Spec) {
// add Spec Patch
newSpec, err := json.Marshal(service.Spec)
if err != nil {
return patchOps, err
}
patchOps = append(patchOps, fmt.Sprintf(`{ "op": "replace", "path": "/spec", "value": %s }`, string(newSpec)))
}
return patchOps, nil
}
func (r *Reconciler) createOrUpdateServiceAccount(sa *corev1.ServiceAccount) error {
core := r.clientset.CoreV1()
version, imageRegistry, id := getTargetVersionRegistryID(r.kv)
injectOperatorMetadata(r.kv, &sa.ObjectMeta, version, imageRegistry, id, true)
obj, exists, _ := r.stores.ServiceAccountCache.Get(sa)
if !exists {
// Create non existent
r.expectations.ServiceAccount.RaiseExpectations(r.kvKey, 1, 0)
_, err := core.ServiceAccounts(r.kv.Namespace).Create(context.Background(), sa, metav1.CreateOptions{})
if err != nil {
r.expectations.ServiceAccount.LowerExpectations(r.kvKey, 1, 0)
return fmt.Errorf("unable to create serviceaccount %+v: %v", sa, err)
}
log.Log.V(2).Infof("serviceaccount %v created", sa.GetName())
return nil
}
cachedSa := obj.(*corev1.ServiceAccount)
modified := resourcemerge.BoolPtr(false)
resourcemerge.EnsureObjectMeta(modified, &cachedSa.ObjectMeta, sa.ObjectMeta)
// there was no change to metadata
if !*modified {
// Up to date
log.Log.V(4).Infof("serviceaccount %v already exists and is up-to-date", sa.GetName())
return nil
}
// Patch Labels and Annotations
labelAnnotationPatch, err := createLabelsAndAnnotationsPatch(&sa.ObjectMeta)
if err != nil {
return err
}
_, err = core.ServiceAccounts(r.kv.Namespace).Patch(context.Background(), sa.Name, types.JSONPatchType, generatePatchBytes(labelAnnotationPatch), metav1.PatchOptions{})
if err != nil {
return fmt.Errorf("unable to patch serviceaccount %+v: %v", sa, err)
}
log.Log.V(2).Infof("serviceaccount %v updated", sa.GetName())
return nil
}
func (r *Reconciler) createOrUpdateRbac() error {
version, imageRegistry, id := getTargetVersionRegistryID(r.kv)
// create/update ServiceAccounts
for _, sa := range r.targetStrategy.ServiceAccounts() {
if err := r.createOrUpdateServiceAccount(sa.DeepCopy()); err != nil {
return err
}
}
// create/update ClusterRoles
for _, cr := range r.targetStrategy.ClusterRoles() {
err := r.createOrUpdateClusterRole(cr, version, imageRegistry, id)
if err != nil {
return err
}
}
// create/update ClusterRoleBindings
for _, crb := range r.targetStrategy.ClusterRoleBindings() {
err := r.createOrUpdateClusterRoleBinding(crb, version, imageRegistry, id)
if err != nil {
return err
}
}
// create/update Roles
for _, role := range r.targetStrategy.Roles() {
err := r.createOrUpdateRole(role, version, imageRegistry, id)
if err != nil {
return err
}
}
// create/update RoleBindings
for _, rb := range r.targetStrategy.RoleBindings() {
err := r.createOrUpdateRoleBinding(rb, version, imageRegistry, id)
if err != nil {
return err
}
}
return nil
}
func findRequiredCAConfigMap(configmaps []*corev1.ConfigMap) *corev1.ConfigMap {
for _, cm := range configmaps {
if cm.Name != components.KubeVirtCASecretName {
continue
}
return cm.DeepCopy()
}
return nil
}
func shouldUpdateBundle(required, existing *corev1.ConfigMap, key string, queue workqueue.RateLimitingInterface, caCert *tls.Certificate, overlapInterval *metav1.Duration) (bool, error) {
bundle, certCount, err := components.MergeCABundle(caCert, []byte(existing.Data[components.CABundleKey]), overlapInterval.Duration)
if err != nil {
// the only error that can be returned form MergeCABundle is if the CA caBundle
// is unable to be parsed. If we can not parse it we should update it
return true, err
}
// ensure that we remove the old CA after the overlap period
if certCount > 1 {
queue.AddAfter(key, overlapInterval.Duration)
}
updateBundle := false
required.Data = map[string]string{components.CABundleKey: string(bundle)}
if !reflect.DeepEqual(required.Data, existing.Data) {
updateBundle = true
}
return updateBundle, nil
}
func (r *Reconciler) createOrUpdateKubeVirtCAConfigMap(queue workqueue.RateLimitingInterface, caCert *tls.Certificate, overlapInterval *metav1.Duration, configMap *corev1.ConfigMap) (caBundle []byte, err error) {
if configMap == nil {
return nil, nil
}
log.DefaultLogger().V(4).Infof("checking ca config map %v", configMap.Name)
version, imageRegistry, id := getTargetVersionRegistryID(r.kv)
injectOperatorMetadata(r.kv, &configMap.ObjectMeta, version, imageRegistry, id, true)
obj, exists, _ := r.stores.ConfigMapCache.Get(configMap)
if !exists {
configMap.Data = map[string]string{components.CABundleKey: string(cert.EncodeCertPEM(caCert.Leaf))}
r.expectations.ConfigMap.RaiseExpectations(r.kvKey, 1, 0)
_, err := r.clientset.CoreV1().ConfigMaps(configMap.Namespace).Create(context.Background(), configMap, metav1.CreateOptions{})
if err != nil {
r.expectations.ConfigMap.LowerExpectations(r.kvKey, 1, 0)
return nil, fmt.Errorf("unable to create configMap %+v: %v", configMap, err)
}
return []byte(configMap.Data[components.CABundleKey]), nil
}
existing := obj.(*corev1.ConfigMap)
updateBundle, err := shouldUpdateBundle(configMap, existing, r.kvKey, queue, caCert, overlapInterval)
if err != nil {
if !updateBundle {
return nil, err
}
configMap.Data = map[string]string{components.CABundleKey: string(cert.EncodeCertPEM(caCert.Leaf))}
log.Log.Reason(err).V(2).Infof("There was an error validating the CA bundle stored in configmap %s. We are updating the bundle.", configMap.GetName())
}
modified := resourcemerge.BoolPtr(false)
resourcemerge.EnsureObjectMeta(modified, &existing.DeepCopy().ObjectMeta, configMap.ObjectMeta)
if !*modified && !updateBundle {
log.Log.V(4).Infof("configMap %v is up-to-date", configMap.GetName())
return []byte(configMap.Data[components.CABundleKey]), nil
}
ops, err := createConfigMapPatch(configMap)
if err != nil {
return nil, err
}
_, err = r.clientset.CoreV1().ConfigMaps(configMap.Namespace).Patch(context.Background(), configMap.Name, types.JSONPatchType, generatePatchBytes(ops), metav1.PatchOptions{})
if err != nil {
return nil, fmt.Errorf("unable to patch configMap %+v: %v", configMap, err)
}
log.Log.V(2).Infof("configMap %v updated", configMap.GetName())
return []byte(configMap.Data[components.CABundleKey]), nil
}
func createConfigMapPatch(configMap *corev1.ConfigMap) ([]string, error) {
// Patch if old version
var ops []string
// Add Labels and Annotations Patches
labelAnnotationPatch, err := createLabelsAndAnnotationsPatch(&configMap.ObjectMeta)
if err != nil {
return ops, err
}
ops = append(ops, labelAnnotationPatch...)
// Add Spec Patch
data, err := json.Marshal(configMap.Data)
if err != nil {
return ops, err
}
ops = append(ops, fmt.Sprintf(`{ "op": "replace", "path": "/data", "value": %s }`, string(data)))
return ops, nil
}
func (r *Reconciler) createOrUpdateCACertificateSecret(queue workqueue.RateLimitingInterface, duration *metav1.Duration, renewBefore *metav1.Duration) (caCert *tls.Certificate, err error) {
for _, secret := range r.targetStrategy.CertificateSecrets() {
// Only work on the ca secret
if secret.Name != components.KubeVirtCASecretName {
continue
}
return r.createOrUpdateCertificateSecret(queue, nil, secret, duration, renewBefore, nil)
}
return nil, nil
}