mirror of https://github.com/k3s-io/k3s
99 lines
3.2 KiB
Go
99 lines
3.2 KiB
Go
/*
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Copyright 2016 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 kubelet
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import (
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"fmt"
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"time"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/util/clock"
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"k8s.io/client-go/tools/record"
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"k8s.io/kubernetes/pkg/kubelet/lifecycle"
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"k8s.io/kubernetes/pkg/kubelet/status"
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)
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const (
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reason = "DeadlineExceeded"
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message = "Pod was active on the node longer than the specified deadline"
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)
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// activeDeadlineHandler knows how to enforce active deadlines on pods.
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type activeDeadlineHandler struct {
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// the clock to use for deadline enforcement
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clock clock.Clock
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// the provider of pod status
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podStatusProvider status.PodStatusProvider
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// the recorder to dispatch events when we identify a pod has exceeded active deadline
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recorder record.EventRecorder
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}
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// newActiveDeadlineHandler returns an active deadline handler that can enforce pod active deadline
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func newActiveDeadlineHandler(
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podStatusProvider status.PodStatusProvider,
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recorder record.EventRecorder,
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clock clock.Clock,
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) (*activeDeadlineHandler, error) {
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// check for all required fields
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if clock == nil || podStatusProvider == nil || recorder == nil {
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return nil, fmt.Errorf("required arguments must not be nil: %v, %v, %v", clock, podStatusProvider, recorder)
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}
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return &activeDeadlineHandler{
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clock: clock,
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podStatusProvider: podStatusProvider,
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recorder: recorder,
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}, nil
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}
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// ShouldSync returns true if the pod is past its active deadline.
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func (m *activeDeadlineHandler) ShouldSync(pod *v1.Pod) bool {
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return m.pastActiveDeadline(pod)
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}
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// ShouldEvict returns true if the pod is past its active deadline.
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// It dispatches an event that the pod should be evicted if it is past its deadline.
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func (m *activeDeadlineHandler) ShouldEvict(pod *v1.Pod) lifecycle.ShouldEvictResponse {
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if !m.pastActiveDeadline(pod) {
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return lifecycle.ShouldEvictResponse{Evict: false}
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}
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m.recorder.Eventf(pod, v1.EventTypeNormal, reason, message)
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return lifecycle.ShouldEvictResponse{Evict: true, Reason: reason, Message: message}
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}
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// pastActiveDeadline returns true if the pod has been active for more than its ActiveDeadlineSeconds
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func (m *activeDeadlineHandler) pastActiveDeadline(pod *v1.Pod) bool {
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// no active deadline was specified
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if pod.Spec.ActiveDeadlineSeconds == nil {
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return false
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}
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// get the latest status to determine if it was started
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podStatus, ok := m.podStatusProvider.GetPodStatus(pod.UID)
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if !ok {
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podStatus = pod.Status
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}
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// we have no start time so just return
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if podStatus.StartTime.IsZero() {
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return false
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}
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// determine if the deadline was exceeded
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start := podStatus.StartTime.Time
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duration := m.clock.Since(start)
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allowedDuration := time.Duration(*pod.Spec.ActiveDeadlineSeconds) * time.Second
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return duration >= allowedDuration
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}
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