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node.go
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node.go
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package watcher
import (
"context"
"strconv"
"strings"
"time"
"github.com/rancher/rancher/pkg/controllers/user/alert/manager"
nodeHelper "github.com/rancher/rancher/pkg/node"
"github.com/rancher/rancher/pkg/ticker"
"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"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/selection"
)
type NodeWatcher struct {
machineLister v3.NodeLister
nodeLister v1.NodeLister
clusterAlerts v3.ClusterAlertInterface
clusterAlertLister v3.ClusterAlertLister
alertManager *manager.Manager
clusterName string
clusterLister v3.ClusterLister
}
func StartNodeWatcher(ctx context.Context, cluster *config.UserContext, manager *manager.Manager) {
clusterAlerts := cluster.Management.Management.ClusterAlerts(cluster.ClusterName)
n := &NodeWatcher{
machineLister: cluster.Management.Management.Nodes(cluster.ClusterName).Controller().Lister(),
nodeLister: cluster.Core.Nodes("").Controller().Lister(),
clusterAlerts: clusterAlerts,
clusterAlertLister: clusterAlerts.Controller().Lister(),
alertManager: manager,
clusterName: cluster.ClusterName,
clusterLister: cluster.Management.Management.Clusters("").Controller().Lister(),
}
go n.watch(ctx, syncInterval)
}
func (w *NodeWatcher) watch(ctx context.Context, interval time.Duration) {
for range ticker.Context(ctx, interval) {
err := w.watchRule()
if err != nil {
logrus.Infof("Failed to watch node, error: %v", err)
}
}
}
func (w *NodeWatcher) watchRule() error {
if w.alertManager.IsDeploy == false {
return nil
}
clusterAlerts, err := w.clusterAlertLister.List("", labels.NewSelector())
if err != nil {
return err
}
machines, err := w.machineLister.List("", labels.NewSelector())
if err != nil {
return err
}
for _, alert := range clusterAlerts {
if alert.Status.AlertState == "inactive" {
continue
}
if alert.Spec.TargetNode == nil {
continue
}
if alert.Spec.TargetNode.NodeName != "" {
parts := strings.Split(alert.Spec.TargetNode.NodeName, ":")
if len(parts) != 2 {
continue
}
id := parts[1]
machine := getMachineByID(machines, id)
if machine == nil {
if err = w.clusterAlerts.Delete(alert.Name, &metav1.DeleteOptions{}); err != nil {
return err
}
continue
}
w.checkNodeCondition(alert, machine)
} else if alert.Spec.TargetNode.Selector != nil {
selector := labels.NewSelector()
for key, value := range alert.Spec.TargetNode.Selector {
r, err := labels.NewRequirement(key, selection.Equals, []string{value})
if err != nil {
logrus.Warnf("Fail to create new requirement foo %s: %v", key, err)
continue
}
selector = selector.Add(*r)
}
nodes, err := w.nodeLister.List("", selector)
if err != nil {
logrus.Warnf("Fail to list node: %v", err)
continue
}
for _, node := range nodes {
machine := nodeHelper.GetNodeByNodeName(machines, node.Name)
w.checkNodeCondition(alert, machine)
}
}
}
return nil
}
func getMachineByID(machines []*v3.Node, id string) *v3.Node {
for _, m := range machines {
if m.Name == id {
return m
}
}
return nil
}
func (w *NodeWatcher) checkNodeCondition(alert *v3.ClusterAlert, machine *v3.Node) {
switch alert.Spec.TargetNode.Condition {
case "notready":
w.checkNodeReady(alert, machine)
case "mem":
w.checkNodeMemUsage(alert, machine)
case "cpu":
w.checkNodeCPUUsage(alert, machine)
}
}
func (w *NodeWatcher) checkNodeMemUsage(alert *v3.ClusterAlert, machine *v3.Node) {
alertID := alert.Namespace + "-" + alert.Name
if v3.NodeConditionProvisioned.IsTrue(machine) {
total := machine.Status.InternalNodeStatus.Allocatable.Memory()
used := machine.Status.Requested.Memory()
if used.Value()*100.0/total.Value() > int64(alert.Spec.TargetNode.MemThreshold) {
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"] = "nodeMemory"
data["alert_id"] = alertID
data["severity"] = alert.Spec.Severity
data["alert_name"] = alert.Spec.DisplayName
data["cluster_name"] = clusterDisplayName
data["mem_threshold"] = strconv.Itoa(alert.Spec.TargetNode.MemThreshold)
data["used_mem"] = used.String()
data["total_mem"] = total.String()
data["node_name"] = nodeHelper.GetNodeName(machine)
if err := w.alertManager.SendAlert(data); err != nil {
logrus.Debugf("Failed to send alert: %v", err)
}
}
}
}
func (w *NodeWatcher) checkNodeCPUUsage(alert *v3.ClusterAlert, machine *v3.Node) {
alertID := alert.Namespace + "-" + alert.Name
if v3.NodeConditionProvisioned.IsTrue(machine) {
total := machine.Status.InternalNodeStatus.Allocatable.Cpu()
used := machine.Status.Requested.Cpu()
if used.MilliValue()*100.0/total.MilliValue() > int64(alert.Spec.TargetNode.CPUThreshold) {
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"] = "nodeCPU"
data["alert_id"] = alertID
data["severity"] = alert.Spec.Severity
data["alert_name"] = alert.Spec.DisplayName
data["cluster_name"] = clusterDisplayName
data["cpu_threshold"] = strconv.Itoa(alert.Spec.TargetNode.CPUThreshold)
data["used_cpu"] = strconv.FormatInt(used.MilliValue(), 10)
data["total_cpu"] = strconv.FormatInt(total.MilliValue(), 10)
data["node_name"] = nodeHelper.GetNodeName(machine)
if err := w.alertManager.SendAlert(data); err != nil {
logrus.Debugf("Failed to send alert: %v", err)
}
}
}
}
func (w *NodeWatcher) checkNodeReady(alert *v3.ClusterAlert, machine *v3.Node) {
alertID := alert.Namespace + "-" + alert.Name
for _, cond := range machine.Status.InternalNodeStatus.Conditions {
if cond.Type == corev1.NodeReady {
if cond.Status != corev1.ConditionTrue {
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"] = "nodeHealthy"
data["alert_id"] = alertID
data["severity"] = alert.Spec.Severity
data["alert_name"] = alert.Spec.DisplayName
data["cluster_name"] = clusterDisplayName
data["node_name"] = nodeHelper.GetNodeName(machine)
if cond.Message != "" {
data["logs"] = cond.Message
}
if err := w.alertManager.SendAlert(data); err != nil {
logrus.Debugf("Failed to send alert: %v", err)
}
return
}
}
}
}