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eventssyncer.go
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eventssyncer.go
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package eventssyncer
import (
"strings"
"github.com/pkg/errors"
"github.com/rancher/types/apis/core/v1"
"github.com/rancher/types/apis/management.cattle.io/v3"
"github.com/rancher/types/config"
"github.com/sirupsen/logrus"
corev1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
projectIDLabel = "field.cattle.io/projectId"
)
type EventsSyncer struct {
clusterName string
clusters v3.ClusterLister
clusterEvents v3.ClusterEventLister
clusterEventsClient v3.ClusterEventInterface
clusterNamespaces v1.NamespaceLister
managementNamespaces v1.NamespaceLister
}
func Register(workload *config.UserContext) {
e := &EventsSyncer{
clusterName: workload.ClusterName,
clusters: workload.Management.Management.Clusters("").Controller().Lister(),
clusterEventsClient: workload.Management.Management.ClusterEvents(""),
clusterNamespaces: workload.Core.Namespaces("").Controller().Lister(),
managementNamespaces: workload.Management.Core.Namespaces("").Controller().Lister(),
clusterEvents: workload.Management.Management.ClusterEvents("").Controller().Lister(),
}
workload.Core.Events("").Controller().AddHandler("events-syncer", e.sync)
}
func (e *EventsSyncer) sync(key string, event *corev1.Event) error {
if event == nil {
return nil
}
return e.createClusterEvent(key, event)
}
func (e *EventsSyncer) createClusterEvent(key string, event *corev1.Event) error {
ns, err := e.getEventNamespaceName(event)
if err != nil {
if apierrors.IsNotFound(err) {
logrus.Warnf("Error propagating event [%s]: %v", event.Message, err)
return nil
}
return err
}
if ns == nil || ns.DeletionTimestamp != nil {
return nil
}
existing, err := e.clusterEvents.Get(ns.Name, event.Name)
if err == nil || apierrors.IsNotFound(err) {
if existing != nil && existing.Name != "" {
return nil
}
cluster, err := e.clusters.Get("", e.clusterName)
if err != nil {
if apierrors.IsNotFound(err) {
return nil
}
return errors.Wrapf(err, "Failed to get cluster [%s]", e.clusterName)
}
if cluster.DeletionTimestamp != nil {
return nil
}
logrus.Debugf("Creating cluster event [%s]", event.Message)
clusterEvent := e.convertEventToClusterEvent(event, ns)
_, err = e.clusterEventsClient.Create(clusterEvent)
return err
}
return err
}
func (e *EventsSyncer) convertEventToClusterEvent(event *corev1.Event, ns *corev1.Namespace) *v3.ClusterEvent {
clusterEvent := &v3.ClusterEvent{
Event: *event,
}
clusterEvent.APIVersion = "management.cattle.io/v3"
clusterEvent.Kind = "ClusterEvent"
clusterEvent.ClusterName = e.clusterName
clusterEvent.ObjectMeta = metav1.ObjectMeta{
Name: event.Name,
Labels: event.Labels,
Annotations: event.Annotations,
Namespace: ns.Name,
}
return clusterEvent
}
func (e *EventsSyncer) getEventNamespaceName(event *corev1.Event) (*corev1.Namespace, error) {
involedObjectNamespace := event.InvolvedObject.Namespace
if involedObjectNamespace == "" {
// cluster namespace, equals to cluster.name
namespace, err := e.managementNamespaces.Get("", e.clusterName)
if err != nil {
return nil, err
}
return namespace, nil
}
// user namespace, derive from the project id
// field.cattle.io/projectId value is <cluster name>:<project name>
userNamespace, err := e.clusterNamespaces.Get("", involedObjectNamespace)
if err != nil {
return nil, errors.Wrapf(err, "Failed to find user namespace [%s]", e.clusterName)
}
if userNamespace.Annotations[projectIDLabel] != "" {
parts := strings.Split(userNamespace.Annotations[projectIDLabel], ":")
if len(parts) == 2 {
// project namespace name == project name
projectNamespaceName := parts[1]
namespace, err := e.managementNamespaces.Get("", projectNamespaceName)
if err != nil {
return nil, err
}
return namespace, nil
}
}
return nil, nil
}