mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-24 12:15:52 +00:00
95 lines
2.3 KiB
Go
95 lines
2.3 KiB
Go
//go:build linux
|
|
// +build linux
|
|
|
|
/*
|
|
Copyright 2015 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package oom
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
v1 "k8s.io/api/core/v1"
|
|
"k8s.io/apimachinery/pkg/util/runtime"
|
|
"k8s.io/client-go/tools/record"
|
|
"k8s.io/klog/v2"
|
|
|
|
"github.com/google/cadvisor/utils/oomparser"
|
|
)
|
|
|
|
type streamer interface {
|
|
StreamOoms(chan<- *oomparser.OomInstance)
|
|
}
|
|
|
|
var _ streamer = &oomparser.OomParser{}
|
|
|
|
type realWatcher struct {
|
|
recorder record.EventRecorder
|
|
oomStreamer streamer
|
|
}
|
|
|
|
var _ Watcher = &realWatcher{}
|
|
|
|
// NewWatcher creates and initializes a OOMWatcher backed by Cadvisor as
|
|
// the oom streamer.
|
|
func NewWatcher(recorder record.EventRecorder) (Watcher, error) {
|
|
// for test purpose
|
|
_, ok := recorder.(*record.FakeRecorder)
|
|
if ok {
|
|
return nil, nil
|
|
}
|
|
|
|
oomStreamer, err := oomparser.New()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
watcher := &realWatcher{
|
|
recorder: recorder,
|
|
oomStreamer: oomStreamer,
|
|
}
|
|
|
|
return watcher, nil
|
|
}
|
|
|
|
const (
|
|
systemOOMEvent = "SystemOOM"
|
|
recordEventContainerName = "/"
|
|
)
|
|
|
|
// Start watches for system oom's and records an event for every system oom encountered.
|
|
func (ow *realWatcher) Start(ref *v1.ObjectReference) error {
|
|
outStream := make(chan *oomparser.OomInstance, 10)
|
|
go ow.oomStreamer.StreamOoms(outStream)
|
|
|
|
go func() {
|
|
defer runtime.HandleCrash()
|
|
|
|
for event := range outStream {
|
|
if event.VictimContainerName == recordEventContainerName {
|
|
klog.V(1).InfoS("Got sys oom event", "event", event)
|
|
eventMsg := "System OOM encountered"
|
|
if event.ProcessName != "" && event.Pid != 0 {
|
|
eventMsg = fmt.Sprintf("%s, victim process: %s, pid: %d", eventMsg, event.ProcessName, event.Pid)
|
|
}
|
|
ow.recorder.Eventf(ref, v1.EventTypeWarning, systemOOMEvent, eventMsg)
|
|
}
|
|
}
|
|
klog.ErrorS(nil, "Unexpectedly stopped receiving OOM notifications")
|
|
}()
|
|
return nil
|
|
}
|