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workload.go
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workload.go
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package watcher
import (
"context"
"strconv"
"time"
"github.com/rancher/norman/controller"
"github.com/rancher/rancher/pkg/controllers/user/alert/manager"
"github.com/rancher/rancher/pkg/controllers/user/workload"
"github.com/rancher/rancher/pkg/ticker"
"github.com/rancher/types/apis/management.cattle.io/v3"
"github.com/rancher/types/config"
"github.com/sirupsen/logrus"
corev1 "k8s.io/api/core/v1"
kerrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/client-go/tools/cache"
nsutils "github.com/rancher/rancher/pkg/namespace"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
syncInterval = 30 * time.Second
nsByProjectIndex = "projectalert.cluster.cattle.io/ns-by-project"
)
type WorkloadWatcher struct {
workloadController workload.CommonController
alertManager *manager.Manager
projectAlerts v3.ProjectAlertInterface
projectAlertLister v3.ProjectAlertLister
clusterName string
clusterLister v3.ClusterLister
namespaceIndexer cache.Indexer
}
func StartWorkloadWatcher(ctx context.Context, cluster *config.UserContext, manager *manager.Manager) {
nsInformer := cluster.Core.Namespaces("").Controller().Informer()
nsIndexers := map[string]cache.IndexFunc{
nsByProjectIndex: nsutils.NsByProjectID,
}
nsInformer.AddIndexers(nsIndexers)
projectAlerts := cluster.Management.Management.ProjectAlerts("")
d := &WorkloadWatcher{
projectAlerts: projectAlerts,
projectAlertLister: projectAlerts.Controller().Lister(),
workloadController: workload.NewWorkloadController(cluster.UserOnlyContext(), nil),
alertManager: manager,
clusterName: cluster.ClusterName,
clusterLister: cluster.Management.Management.Clusters("").Controller().Lister(),
namespaceIndexer: nsInformer.GetIndexer(),
}
go d.watch(ctx, syncInterval)
}
func (w *WorkloadWatcher) watch(ctx context.Context, interval time.Duration) {
for range ticker.Context(ctx, interval) {
err := w.watchRule()
if err != nil {
logrus.Infof("Failed to watch deployment, error: %v", err)
}
}
}
func (w *WorkloadWatcher) watchRule() error {
if w.alertManager.IsDeploy == false {
return nil
}
projectAlerts, err := w.projectAlertLister.List("", labels.NewSelector())
if err != nil {
return err
}
pAlerts := []*v3.ProjectAlert{}
for _, alert := range projectAlerts {
if controller.ObjectInCluster(w.clusterName, alert) {
pAlerts = append(pAlerts, alert)
}
}
for _, alert := range pAlerts {
if alert.Status.AlertState == "inactive" {
continue
}
if alert.Spec.TargetWorkload == nil {
continue
}
if alert.Spec.TargetWorkload.WorkloadID != "" {
wl, err := w.workloadController.GetByWorkloadID(alert.Spec.TargetWorkload.WorkloadID)
if err != nil {
if kerrors.IsNotFound(err) || wl == nil {
if err = w.projectAlerts.DeleteNamespaced(alert.Namespace, alert.Name, &metav1.DeleteOptions{}); err != nil {
return err
}
}
logrus.Warnf("Fail to get workload for %s, %v", alert.Spec.TargetWorkload.WorkloadID, err)
continue
}
w.checkWorkloadCondition(wl, alert)
} else if alert.Spec.TargetWorkload.Selector != nil {
namespaces, err := w.namespaceIndexer.ByIndex(nsByProjectIndex, alert.Spec.ProjectName)
if err != nil {
return err
}
for _, n := range namespaces {
namespace, _ := n.(*corev1.Namespace)
wls, err := w.workloadController.GetWorkloadsMatchingSelector(namespace.Name, alert.Spec.TargetWorkload.Selector)
if err != nil {
logrus.Warnf("Fail to list workload: %v", err)
continue
}
for _, wl := range wls {
w.checkWorkloadCondition(wl, alert)
}
}
}
}
return nil
}
func (w *WorkloadWatcher) checkWorkloadCondition(wl *workload.Workload, alert *v3.ProjectAlert) {
if wl.Kind == workload.JobType || wl.Kind == workload.CronJobType {
return
}
alertID := alert.Namespace + "-" + alert.Name
percentage := alert.Spec.TargetWorkload.AvailablePercentage
if percentage == 0 {
return
}
availableThreshold := int32(percentage) * (wl.Status.Replicas) / 100
if wl.Status.AvailableReplicas < availableThreshold {
clusterDisplayName := w.clusterName
cluster, err := w.clusterLister.Get("", w.clusterName)
if err != nil {
logrus.Warnf("Failed to get cluster for %s: %v", w.clusterName, err)
} else {
clusterDisplayName = cluster.Spec.DisplayName
}
data := map[string]string{}
data["alert_type"] = "workload"
data["alert_id"] = alertID
data["severity"] = alert.Spec.Severity
data["alert_name"] = alert.Spec.DisplayName
data["cluster_name"] = clusterDisplayName
data["workload_name"] = wl.Name
data["available_percentage"] = strconv.Itoa(percentage)
data["available_replicas"] = strconv.Itoa(int(wl.Status.AvailableReplicas))
data["desired_replicas"] = strconv.Itoa(int(wl.Status.Replicas))
if err := w.alertManager.SendAlert(data); err != nil {
logrus.Debugf("Failed to send alert: %v", err)
}
}
}