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event.go
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event.go
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package watcher
import (
"fmt"
"strconv"
"github.com/rancher/rancher/pkg/controllers/user/alert/manager"
"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"
"k8s.io/apimachinery/pkg/labels"
)
type EventWatcher struct {
eventLister v1.EventLister
clusterAlertLister v3.ClusterAlertLister
alertManager *manager.Manager
clusterName string
clusterLister v3.ClusterLister
}
func StartEventWatcher(cluster *config.UserContext, manager *manager.Manager) {
events := cluster.Core.Events("")
eventWatcher := &EventWatcher{
eventLister: events.Controller().Lister(),
clusterAlertLister: cluster.Management.Management.ClusterAlerts(cluster.ClusterName).Controller().Lister(),
alertManager: manager,
clusterName: cluster.ClusterName,
clusterLister: cluster.Management.Management.Clusters("").Controller().Lister(),
}
events.AddHandler("cluster-event-alerter", eventWatcher.Sync)
}
func (l *EventWatcher) Sync(key string, obj *corev1.Event) error {
if l.alertManager.IsDeploy == false {
return nil
}
if obj == nil {
return nil
}
clusterAlerts, err := l.clusterAlertLister.List("", labels.NewSelector())
if err != nil {
return err
}
for _, alert := range clusterAlerts {
if alert.Status.AlertState == "inactive" {
continue
}
alertID := alert.Namespace + "-" + alert.Name
target := alert.Spec.TargetEvent
if target != nil {
if target.EventType == obj.Type && target.ResourceKind == obj.InvolvedObject.Kind {
clusterDisplayName := l.clusterName
cluster, err := l.clusterLister.Get("", l.clusterName)
if err != nil {
logrus.Warnf("Failed to get cluster for %s: %v", l.clusterName, err)
} else {
clusterDisplayName = cluster.Spec.DisplayName
}
data := map[string]string{}
data["alert_type"] = "event"
data["alert_id"] = alertID
data["event_type"] = target.EventType
data["resource_kind"] = target.ResourceKind
data["severity"] = alert.Spec.Severity
data["alert_name"] = alert.Spec.DisplayName
data["cluster_name"] = clusterDisplayName
data["target_name"] = obj.InvolvedObject.Name
data["event_count"] = strconv.Itoa(int(obj.Count))
data["event_message"] = obj.Message
data["event_firstseen"] = fmt.Sprintf("%s", obj.FirstTimestamp)
data["event_lastseen"] = fmt.Sprintf("%s", obj.LastTimestamp)
if err := l.alertManager.SendAlert(data); err != nil {
logrus.Debugf("Failed to send alert: %v", err)
}
}
}
}
return nil
}