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kyverno/pkg/policy/generate.go
shuting 0b359d07db
rename GenerateExistingOnPolicyUpdate to GenerateExisting (#6321)
Signed-off-by: ShutingZhao <shuting@nirmata.com>
2023-03-03 09:34:55 +00:00

148 lines
5.1 KiB
Go

package policy
import (
"context"
"fmt"
kyvernov1 "github.com/kyverno/kyverno/api/kyverno/v1"
kyvernov1beta1 "github.com/kyverno/kyverno/api/kyverno/v1beta1"
"github.com/kyverno/kyverno/pkg/autogen"
"github.com/kyverno/kyverno/pkg/background/common"
generateutils "github.com/kyverno/kyverno/pkg/background/generate"
"github.com/kyverno/kyverno/pkg/config"
"go.uber.org/multierr"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/labels"
)
func (pc *PolicyController) handleGenerate(policyKey string, policy kyvernov1.PolicyInterface) error {
var errors []error
logger := pc.log.WithName("handleGenerate").WithName(policyKey)
logger.Info("update URs on policy event")
for _, rule := range policy.GetSpec().Rules {
if err := pc.createURForDataRule(policy, rule, false); err != nil {
logger.Error(err, "failed to create UR on policy event")
}
var ruleType kyvernov1beta1.RequestType
if policy.GetSpec().IsGenerateExisting() {
ruleType = kyvernov1beta1.Generate
triggers := generateTriggers(pc.client, rule, pc.log)
for _, trigger := range triggers {
gurs := pc.listGenerateURs(policyKey, trigger)
if gurs != nil {
logger.V(4).Info("UR was created", "rule", rule.Name, "rule type", ruleType, "trigger", trigger.GetNamespace()+"/"+trigger.GetName())
continue
}
ur := newUR(policy, common.ResourceSpecFromUnstructured(*trigger), rule.Name, ruleType, false)
skip, err := pc.handleUpdateRequest(ur, trigger, rule, policy)
if err != nil {
pc.log.Error(err, "failed to create new UR on policy update", "policy", policy.GetName(), "rule", rule.Name, "rule type", ruleType,
"target", fmt.Sprintf("%s/%s/%s/%s", trigger.GetAPIVersion(), trigger.GetKind(), trigger.GetNamespace(), trigger.GetName()))
errors = append(errors, err)
continue
}
if skip {
continue
}
logger.V(4).Info("successfully created UR on policy update", "policy", policy.GetName(), "rule", rule.Name, "rule type", ruleType,
"target", fmt.Sprintf("%s/%s/%s/%s", trigger.GetAPIVersion(), trigger.GetKind(), trigger.GetNamespace(), trigger.GetName()))
}
err := multierr.Combine(errors...)
return err
}
}
return nil
}
func (pc *PolicyController) listGenerateURs(policyKey string, trigger *unstructured.Unstructured) []*kyvernov1beta1.UpdateRequest {
generateURs, err := pc.urLister.List(labels.SelectorFromSet(common.GenerateLabelsSet(policyKey, trigger)))
if err != nil {
pc.log.Error(err, "failed to list update request for generate policy")
}
return generateURs
}
func (pc *PolicyController) createURForDownstreamDeletion(policy kyvernov1.PolicyInterface) error {
var errs []error
rules := autogen.ComputeRules(policy)
for _, r := range rules {
generateType, sync := r.GetGenerateTypeAndSync()
if sync && (generateType == kyvernov1.Data) {
if err := pc.createURForDataRule(policy, r, true); err != nil {
errs = append(errs, err)
}
}
}
return multierr.Combine(errs...)
}
func (pc *PolicyController) createURForDataRule(policy kyvernov1.PolicyInterface, rule kyvernov1.Rule, deleteDownstream bool) error {
generate := rule.Generation
if !generate.Synchronize {
// no action for non-sync policy/rule
return nil
}
var errorList []error
if generate.GetData() != nil {
downstreams, err := generateutils.FindDownstream(pc.client, policy, rule)
if err != nil {
return err
}
for _, downstream := range downstreams.Items {
labels := downstream.GetLabels()
trigger := generateutils.TriggerFromLabels(labels)
ur := newUR(policy, trigger, rule.Name, kyvernov1beta1.Generate, deleteDownstream)
created, err := pc.kyvernoClient.KyvernoV1beta1().UpdateRequests(config.KyvernoNamespace()).Create(context.TODO(), ur, metav1.CreateOptions{})
if err != nil {
errorList = append(errorList, err)
continue
}
updated := created.DeepCopy()
updated.Status = newURStatus(downstream)
_, err = pc.kyvernoClient.KyvernoV1beta1().UpdateRequests(config.KyvernoNamespace()).UpdateStatus(context.TODO(), updated, metav1.UpdateOptions{})
if err != nil {
errorList = append(errorList, err)
continue
}
}
}
return multierr.Combine(errorList...)
}
// ruleDeletion returns true if any rule is deleted, along with deleted rules
func ruleDeletion(old, new kyvernov1.PolicyInterface) (_ kyvernov1.PolicyInterface, ruleDeleted bool) {
if !new.GetDeletionTimestamp().IsZero() {
return nil, false
}
newRules := new.GetSpec().Rules
oldRules := old.GetSpec().Rules
newRulesMap := make(map[string]bool, len(newRules))
var deletedRules []kyvernov1.Rule
for _, r := range newRules {
newRulesMap[r.Name] = true
}
for _, r := range oldRules {
if exist := newRulesMap[r.Name]; !exist {
deletedRules = append(deletedRules, r)
ruleDeleted = true
}
}
return buildPolicyWithDeletedRules(old, deletedRules), ruleDeleted
}
func buildPolicyWithDeletedRules(policy kyvernov1.PolicyInterface, deletedRules []kyvernov1.Rule) kyvernov1.PolicyInterface {
newPolicy := policy.CreateDeepCopy()
spec := newPolicy.GetSpec()
spec.SetRules(deletedRules)
return newPolicy
}