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event.go
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event.go
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package event
import (
"fmt"
"sort"
"strings"
batchv1 "k8s.io/api/batch/v1"
apiv1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"github.com/Qihoo360/wayne/src/backend/client"
"github.com/Qihoo360/wayne/src/backend/client/api"
basecommon "github.com/Qihoo360/wayne/src/backend/common"
"github.com/Qihoo360/wayne/src/backend/resources/common"
"github.com/Qihoo360/wayne/src/backend/resources/dataselector"
"github.com/Qihoo360/wayne/src/backend/util/slice"
)
// FailedReasonPartials is an array of partial strings to correctly filter warning events.
// Have to be lower case for correct case insensitive comparison.
// Based on k8s official events reason file:
// https://github.com/kubernetes/kubernetes/blob/886e04f1fffbb04faf8a9f9ee141143b2684ae68/pkg/kubelet/events/event.go
// Partial strings that are not in event.go file are added in order to support
// older versions of k8s which contained additional event reason messages.
var FailedReasonPartials = []string{"failed", "err", "exceeded", "invalid", "unhealthy",
"mismatch", "insufficient", "conflict", "outof", "nil", "backoff"}
func GetPodsWarningEvents(indexer *client.CacheFactory, pods []*apiv1.Pod) ([]common.Event, error) {
events, err := indexer.EventLister().List(labels.Everything())
if err != nil {
return nil, err
}
result := make([]common.Event, 0)
// Filter out only warning events
events = getWarningEvents(events)
failedPods := make([]*apiv1.Pod, 0)
// Filter out ready and successful pods
for _, pod := range pods {
if !isReadyOrSucceeded(pod) {
failedPods = append(failedPods, pod)
}
}
// Filter events by failed pods UID
events = filterEventsByPodsUID(events, failedPods)
events = removeDuplicates(events)
for _, event := range events {
result = append(result, common.Event{
Message: event.Message,
Reason: event.Reason,
Type: event.Type,
FirstSeen: event.FirstTimestamp,
LastSeen: event.LastTimestamp,
Count: event.Count,
SourceComponent: event.Source.Component,
Name: event.InvolvedObject.Name,
})
}
return result, nil
}
func getPodsWarningEventsPage(kubeClient client.ResourceHandler, pods []*apiv1.Pod) ([]common.Event, error) {
eventObjs, err := kubeClient.List(api.ResourceNameEvent, "", labels.Everything().String())
if err != nil {
return nil, err
}
events := make([]*apiv1.Event, 0)
for _, obj := range eventObjs {
events = append(events, obj.(*apiv1.Event))
}
result := make([]common.Event, 0)
// Filter out only warning events
events = getWarningEvents(events)
failedPods := make([]*apiv1.Pod, 0)
// Filter out ready and successful pods
for _, pod := range pods {
if !isReadyOrSucceeded(pod) {
failedPods = append(failedPods, pod)
}
}
// Filter events by failed pods UID
events = filterEventsByPodsUID(events, failedPods)
events = removeDuplicates(events)
for _, event := range events {
result = append(result, common.Event{
Message: event.Message,
Reason: event.Reason,
Type: event.Type,
FirstSeen: event.FirstTimestamp,
LastSeen: event.LastTimestamp,
Count: event.Count,
SourceComponent: event.Source.Component,
Name: event.InvolvedObject.Name,
})
}
return result, nil
}
func GetPodsEventByCronJobPage(kubeClient client.ResourceHandler, namespace, name string, q *basecommon.QueryParam) (*basecommon.Page, error) {
jobs, err := kubeClient.List(api.ResourceNameJob, namespace, labels.Everything().String())
if err != nil {
return nil, err
}
relateJobs := make([]string, 0)
for _, obj := range jobs {
job, ok := obj.(*batchv1.Job)
if !ok {
return nil, fmt.Errorf("Convert rs obj (%v) error. ", obj)
}
for _, ref := range job.OwnerReferences {
if ref.Kind == api.KindNameCronJob && ref.Name == name {
relateJobs = append(relateJobs, job.Name)
}
}
}
pods, err := kubeClient.List(api.ResourceNamePod, namespace, labels.Everything().String())
if err != nil {
return nil, err
}
relatePod := make([]*apiv1.Pod, 0)
for _, obj := range pods {
pod, ok := obj.(*apiv1.Pod)
if !ok {
return nil, fmt.Errorf("Convert pod obj (%v) error. ", obj)
}
for _, ref := range pod.OwnerReferences {
if ref.Kind == api.KindNameJob && slice.StrSliceContains(relateJobs, ref.Name) {
relatePod = append(relatePod, pod)
}
}
}
events, err := getPodsWarningEventsPage(kubeClient, relatePod)
if err != nil {
return nil, err
}
return pageResult(events, q), nil
}
func pageResult(events []common.Event, q *basecommon.QueryParam) *basecommon.Page {
commonObjs := make([]dataselector.DataCell, 0)
for _, event := range events {
commonObjs = append(commonObjs, ObjectCell(event))
}
sort.Slice(commonObjs, func(i, j int) bool {
return commonObjs[j].GetProperty(dataselector.CreationTimestampProperty).
Compare(commonObjs[i].GetProperty(dataselector.CreationTimestampProperty)) == -1
})
return dataselector.DataSelectPage(commonObjs, q)
}
// Returns filtered list of event objects.
// Event list object is filtered to get only warning events.
func getWarningEvents(events []*apiv1.Event) []*apiv1.Event {
if !IsTypeFilled(events) {
events = FillEventsType(events)
}
return filterEventsByType(events, apiv1.EventTypeWarning)
}
// IsTypeFilled returns true if all given events type is filled, false otherwise.
// This is needed as some older versions of kubernetes do not have Type property filled.
func IsTypeFilled(events []*apiv1.Event) bool {
if len(events) == 0 {
return false
}
for _, event := range events {
if len(event.Type) == 0 {
return false
}
}
return true
}
// Based on event Reason fills event Type in order to allow correct filtering by Type.
func FillEventsType(events []*apiv1.Event) []*apiv1.Event {
for i := range events {
if isFailedReason(events[i].Reason, FailedReasonPartials...) {
events[i].Type = apiv1.EventTypeWarning
} else {
events[i].Type = apiv1.EventTypeNormal
}
}
return events
}
// Returns true if reason string contains any partial string indicating that this may be a
// warning, false otherwise
func isFailedReason(reason string, partials ...string) bool {
for _, partial := range partials {
if strings.Contains(strings.ToLower(reason), partial) {
return true
}
}
return false
}
// Filters kubernetes API event objects based on event type.
// Empty string will return all events.
func filterEventsByType(events []*apiv1.Event, eventType string) []*apiv1.Event {
if len(eventType) == 0 || len(events) == 0 {
return events
}
result := make([]*apiv1.Event, 0)
for _, event := range events {
if event.Type == eventType {
result = append(result, event)
}
}
return result
}
// Returns true if given pod is in state ready or succeeded, false otherwise
func isReadyOrSucceeded(pod *apiv1.Pod) bool {
if pod.Status.Phase == apiv1.PodSucceeded {
return true
}
if pod.Status.Phase == apiv1.PodRunning {
for _, c := range pod.Status.Conditions {
if c.Type == apiv1.PodReady {
if c.Status == apiv1.ConditionFalse {
return false
}
}
}
return true
}
return false
}
// Returns filtered list of event objects. Events list is filtered to get only events targeting
// pods on the list.
func filterEventsByPodsUID(events []*apiv1.Event, pods []*apiv1.Pod) []*apiv1.Event {
result := make([]*apiv1.Event, 0)
podEventMap := make(map[types.UID]bool, 0)
if len(pods) == 0 || len(events) == 0 {
return result
}
for _, pod := range pods {
podEventMap[pod.UID] = true
}
for _, event := range events {
if _, exists := podEventMap[event.InvolvedObject.UID]; exists {
result = append(result, event)
}
}
return result
}
// Removes duplicate strings from the slice
func removeDuplicates(slice []*apiv1.Event) []*apiv1.Event {
visited := make(map[string]bool, 0)
result := make([]*apiv1.Event, 0)
for _, elem := range slice {
if !visited[elem.Reason] {
visited[elem.Reason] = true
result = append(result, elem)
}
}
return result
}