generated from kyma-project/template-repository
/
delete_resources.go
212 lines (172 loc) · 5.75 KB
/
delete_resources.go
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package reconciler
import (
"context"
"errors"
"fmt"
"github.com/kyma-project/keda-manager/api/v1alpha1"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
defaultDeletionStrategy = safeDeletionStrategy
kedaOperatorLeaseName = "operator.keda.sh"
kedaManagerLeaseName = "4123c01c.operator.kyma-project.io"
)
var (
DeletionErr = errors.New("deletion error")
)
func fixLeaseObject(leaseName string) unstructured.Unstructured {
return unstructured.Unstructured{
Object: map[string]interface{}{
"kind": "Lease",
"apiVersion": "coordination.k8s.io/v1",
"metadata": map[string]interface{}{
"name": leaseName,
"namespace": "kyma-system",
},
},
}
}
func sFnDeleteResources(_ context.Context, _ *fsm, s *systemState) (stateFn, *ctrl.Result, error) {
if !isKedaDeleting(s) {
s.instance.UpdateStateDeletion(
v1alpha1.ConditionTypeDeleted, v1alpha1.ConditionReasonDeletion, "deletion in progress")
return stopWithRequeue()
}
// TODO: thinkg about deletion configuration
return switchState(deletionStrategyBuilder(defaultDeletionStrategy))
}
type deletionStrategy string
const (
cascadeDeletionStrategy deletionStrategy = "cascadeDeletionStrategy"
safeDeletionStrategy deletionStrategy = "safeDeletionStrategy"
upstreamDeletionStrategy deletionStrategy = "upstreamDeletionStrategy"
)
func deletionStrategyBuilder(strategy deletionStrategy) stateFn {
switch strategy {
case cascadeDeletionStrategy:
return sFnCascadeDeletionState
case upstreamDeletionStrategy:
return sFnUpstreamDeletionState
case safeDeletionStrategy:
return sFnSafeDeletionState
default:
return deletionStrategyBuilder(safeDeletionStrategy)
}
}
func sFnCascadeDeletionState(ctx context.Context, r *fsm, s *systemState) (stateFn, *ctrl.Result, error) {
return deleteResourcesWithFilter(ctx, r, s)
}
func sFnUpstreamDeletionState(ctx context.Context, r *fsm, s *systemState) (stateFn, *ctrl.Result, error) {
return deleteResourcesWithFilter(ctx, r, s, withoutCRDFilter)
}
func sFnSafeDeletionState(ctx context.Context, r *fsm, s *systemState) (stateFn, *ctrl.Result, error) {
if err := checkCRDOrphanResources(ctx, r); err != nil {
s.instance.UpdateStateFromWarning(v1alpha1.ConditionTypeDeleted, v1alpha1.ConditionReasonDeletionErr, err)
return stopWithErrorAndNoRequeue(err)
}
return deleteResourcesWithFilter(ctx, r, s)
}
func withoutCRDFilter(u unstructured.Unstructured) bool {
return !isCRD(u)
}
type filterFunc func(unstructured.Unstructured) bool
func deleteResourcesWithFilter(ctx context.Context, r *fsm, s *systemState, filterFunc ...filterFunc) (stateFn, *ctrl.Result, error) {
//ensure lease object will be removed as well
r.AddLeaseObjs()
err := deleteResources(ctx, r, r.Objs, filterFunc)
if err != nil {
s.instance.UpdateStateFromErr(v1alpha1.ConditionTypeDeleted, v1alpha1.ConditionReasonDeletionErr, err)
return stopWithErrorAndNoRequeue(err)
}
condition := meta.FindStatusCondition(s.instance.Status.Conditions, string(v1alpha1.ConditionTypeDeleted))
if condition == nil || condition.Status == "True" {
return switchState(sFnRemoveFinalizer)
}
s.instance.UpdateStateDeletionTrue(
v1alpha1.ConditionTypeDeleted, v1alpha1.ConditionReasonDeleted, "Keda module deleted")
return stopWithRequeue()
}
func deleteResources(ctx context.Context, r *fsm, objs []unstructured.Unstructured, filterFunc []filterFunc) error {
var deletionErrors error
for _, obj := range objs {
if !fitToFilters(obj, filterFunc...) {
r.log.
With("objName", obj.GetName()).
With("gvk", obj.GroupVersionKind()).
Debug("skipped")
continue
}
r.log.
With("objName", obj.GetName()).
With("gvk", obj.GroupVersionKind()).
Debug("deleting")
err := r.Delete(ctx, &obj)
if client.IgnoreNotFound(err) != nil {
r.log.With("deleting resource").Error(err)
deletionErrors = errors.Join(deletionErrors, err)
}
}
return deletionErrors
}
func fitToFilters(u unstructured.Unstructured, filterFunc ...filterFunc) bool {
for _, fn := range filterFunc {
if !fn(u) {
return false
}
}
return true
}
func checkCRDOrphanResources(ctx context.Context, r *fsm) error {
for _, obj := range r.Objs {
if !isCRD(obj) {
continue
}
crdList, err := buildResourceListFromCRD(obj)
if err != nil {
return err
}
err = r.List(ctx, &crdList)
if client.IgnoreNotFound(err) != nil {
return err
}
if len(crdList.Items) > 0 {
return fmt.Errorf("found %d items with VersionKind %s", len(crdList.Items), crdList.GetAPIVersion())
}
}
return nil
}
func isCRD(u unstructured.Unstructured) bool {
return u.GroupVersionKind().GroupKind() == apiextensionsv1.Kind("CustomResourceDefinition")
}
func buildResourceListFromCRD(u unstructured.Unstructured) (unstructured.UnstructuredList, error) {
crd := apiextensionsv1.CustomResourceDefinition{}
crdList := unstructured.UnstructuredList{}
err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.Object, &crd)
if err != nil {
return crdList, err
}
crdList.SetGroupVersionKind(schema.GroupVersionKind{
Group: crd.Spec.Group,
Version: getCRDStoredVersion(crd),
Kind: crd.Spec.Names.Kind,
})
return crdList, nil
}
func getCRDStoredVersion(crd apiextensionsv1.CustomResourceDefinition) string {
for _, version := range crd.Spec.Versions {
if version.Storage {
return version.Name
}
}
return ""
}
func isKedaDeleting(s *systemState) bool {
conditionDeleted := meta.FindStatusCondition(s.instance.Status.Conditions, string(v1alpha1.ConditionTypeDeleted))
return conditionDeleted != nil
}