125 lines
4.1 KiB
Go
125 lines
4.1 KiB
Go
package configmanager
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import (
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"fmt"
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"sort"
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"sync/atomic"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime/schema"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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"k8s.io/client-go/tools/cache"
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"k8s.io/klog/v2"
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configv1alpha1 "github.com/karmada-io/karmada/pkg/apis/config/v1alpha1"
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"github.com/karmada-io/karmada/pkg/util/fedinformer"
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"github.com/karmada-io/karmada/pkg/util/fedinformer/genericmanager"
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"github.com/karmada-io/karmada/pkg/util/helper"
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)
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var resourceExploringWebhookConfigurationsGVR = schema.GroupVersionResource{
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Group: configv1alpha1.GroupVersion.Group,
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Version: configv1alpha1.GroupVersion.Version,
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Resource: "resourceinterpreterwebhookconfigurations",
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}
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// ConfigManager can list dynamic webhooks.
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type ConfigManager interface {
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HookAccessors() []WebhookAccessor
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HasSynced() bool
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}
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// interpreterConfigManager collect the resource interpreter webhook configuration.
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type interpreterConfigManager struct {
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configuration *atomic.Value
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lister cache.GenericLister
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initialSynced *atomic.Value
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}
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// HookAccessors return all configured resource interpreter webhook.
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func (m *interpreterConfigManager) HookAccessors() []WebhookAccessor {
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return m.configuration.Load().([]WebhookAccessor)
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}
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// HasSynced return true when the manager is synced with existing configuration.
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func (m *interpreterConfigManager) HasSynced() bool {
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if m.initialSynced.Load().(bool) {
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return true
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}
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if configuration, err := m.lister.List(labels.Everything()); err == nil && len(configuration) == 0 {
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// the empty list we initially stored is valid to use.
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// Setting initialSynced to true, so subsequent checks
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// would be able to take the fast path on the atomic boolean in a
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// cluster without any webhooks configured.
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m.initialSynced.Store(true)
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// the informer has synced, and we don't have any items
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return true
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}
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return false
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}
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// NewExploreConfigManager return a new interpreterConfigManager with resourceinterpreterwebhookconfigurations handlers.
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func NewExploreConfigManager(inform genericmanager.SingleClusterInformerManager) ConfigManager {
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manager := &interpreterConfigManager{
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configuration: &atomic.Value{},
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lister: inform.Lister(resourceExploringWebhookConfigurationsGVR),
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initialSynced: &atomic.Value{},
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}
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manager.configuration.Store([]WebhookAccessor{})
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manager.initialSynced.Store(false)
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configHandlers := fedinformer.NewHandlerOnEvents(
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func(_ interface{}) { manager.updateConfiguration() },
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func(_, _ interface{}) { manager.updateConfiguration() },
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func(_ interface{}) { manager.updateConfiguration() })
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inform.ForResource(resourceExploringWebhookConfigurationsGVR, configHandlers)
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return manager
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}
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func (m *interpreterConfigManager) updateConfiguration() {
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configurations, err := m.lister.List(labels.Everything())
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if err != nil {
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utilruntime.HandleError(fmt.Errorf("error updating configuration: %v", err))
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return
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}
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configs := make([]*configv1alpha1.ResourceInterpreterWebhookConfiguration, 0)
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for _, c := range configurations {
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unstructuredConfig, err := helper.ToUnstructured(c)
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if err != nil {
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klog.Errorf("Failed to transform ResourceInterpreterWebhookConfiguration: %w", err)
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return
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}
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config := &configv1alpha1.ResourceInterpreterWebhookConfiguration{}
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err = helper.ConvertToTypedObject(unstructuredConfig, config)
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if err != nil {
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gvk := unstructuredConfig.GroupVersionKind().String()
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klog.Errorf("Failed to convert object(%s), err: %v", gvk, err)
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return
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}
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configs = append(configs, config)
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}
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m.configuration.Store(mergeResourceExploreWebhookConfigurations(configs))
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m.initialSynced.Store(true)
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}
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func mergeResourceExploreWebhookConfigurations(configurations []*configv1alpha1.ResourceInterpreterWebhookConfiguration) []WebhookAccessor {
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sort.SliceStable(configurations, func(i, j int) bool {
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return configurations[i].Name < configurations[j].Name
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})
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var accessors []WebhookAccessor
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for ci, config := range configurations {
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for hi, hook := range config.Webhooks {
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uid := fmt.Sprintf("%s/%s", config.Name, hook.Name)
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accessors = append(accessors, NewResourceExploringAccessor(uid, config.Name, &configurations[ci].Webhooks[hi]))
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}
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}
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return accessors
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}
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