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106 lines
3 KiB
Go
106 lines
3 KiB
Go
package policycache
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import (
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"context"
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"github.com/go-logr/logr"
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kyvernov1 "github.com/kyverno/kyverno/api/kyverno/v1"
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kyvernov1informers "github.com/kyverno/kyverno/pkg/client/informers/externalversions/kyverno/v1"
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kyvernov1listers "github.com/kyverno/kyverno/pkg/client/listers/kyverno/v1"
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pcache "github.com/kyverno/kyverno/pkg/policycache"
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controllerutils "github.com/kyverno/kyverno/pkg/utils/controller"
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"k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/client-go/tools/cache"
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"k8s.io/client-go/util/workqueue"
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)
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const (
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maxRetries = 10
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workers = 3
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)
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type controller struct {
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cache pcache.Cache
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// listers
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cpolLister kyvernov1listers.ClusterPolicyLister
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polLister kyvernov1listers.PolicyLister
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// cpolSynced returns true if the cluster policy shared informer has synced at least once
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cpolSynced cache.InformerSynced
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// polSynced returns true if the policy shared informer has synced at least once
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polSynced cache.InformerSynced
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// queue
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queue workqueue.RateLimitingInterface
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}
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func NewController(pcache pcache.Cache, cpolInformer kyvernov1informers.ClusterPolicyInformer, polInformer kyvernov1informers.PolicyInformer) *controller {
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c := controller{
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cache: pcache,
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cpolLister: cpolInformer.Lister(),
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polLister: polInformer.Lister(),
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cpolSynced: cpolInformer.Informer().HasSynced,
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polSynced: polInformer.Informer().HasSynced,
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queue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), controllerName),
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}
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controllerutils.AddDefaultEventHandlers(logger.V(3), cpolInformer.Informer(), c.queue)
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controllerutils.AddDefaultEventHandlers(logger.V(3), polInformer.Informer(), c.queue)
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return &c
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}
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func (c *controller) WarmUp() error {
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logger.Info("warming up ...")
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defer logger.Info("warm up done")
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pols, err := c.polLister.Policies(metav1.NamespaceAll).List(labels.Everything())
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if err != nil {
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return err
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}
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for _, policy := range pols {
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if key, err := cache.MetaNamespaceKeyFunc(policy); err != nil {
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return err
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} else {
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c.cache.Set(key, policy)
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}
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}
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cpols, err := c.cpolLister.List(labels.Everything())
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if err != nil {
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return err
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}
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for _, policy := range cpols {
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if key, err := cache.MetaNamespaceKeyFunc(policy); err != nil {
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return err
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} else {
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c.cache.Set(key, policy)
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}
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}
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return nil
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}
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func (c *controller) Run(ctx context.Context) {
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controllerutils.Run(ctx, controllerName, logger.V(3), c.queue, workers, maxRetries, c.reconcile, c.cpolSynced, c.polSynced)
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}
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func (c *controller) reconcile(ctx context.Context, logger logr.Logger, key, namespace, name string) error {
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policy, err := c.loadPolicy(namespace, name)
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if err != nil {
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if errors.IsNotFound(err) {
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c.cache.Unset(key)
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}
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return err
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}
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// TODO: check resource version ?
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c.cache.Set(key, policy)
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return nil
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}
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func (c *controller) loadPolicy(namespace, name string) (kyvernov1.PolicyInterface, error) {
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if namespace == "" {
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return c.cpolLister.Get(name)
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} else {
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return c.polLister.Policies(namespace).Get(name)
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}
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}
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