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