b906e34576
Currently, whenever there is any update, kubelet would force all pod workers to sync again, causing resource contention and hence performance degradation. This commit flips kubelet to use incremental updates (as opposed to snapshots). This allows us to know what pods have changed and send updates to those pod workers only. The `SyncPods` function has been replaced with individual handlers, each handling an operation (ADD, REMOVE, UPDATE). Pod workers are still triggered periodically, and kubelet performs periodic cleanup as well. This commit also spawns a new goroutine solely responsible for killing pods. This is necessary because pod killing could hold up the sync loop for indefinitely long amount of time now user can define the graceful termination period in the container spec.
50 lines
1.5 KiB
Go
50 lines
1.5 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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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"k8s.io/kubernetes/pkg/api"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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"k8s.io/kubernetes/pkg/types"
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)
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// fakePodWorkers runs sync pod function in serial, so we can have
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// deterministic behaviour in testing.
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type fakePodWorkers struct {
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syncPodFn syncPodFnType
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runtimeCache kubecontainer.RuntimeCache
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t TestingInterface
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}
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func (f *fakePodWorkers) UpdatePod(pod *api.Pod, mirrorPod *api.Pod, updateComplete func()) {
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pods, err := f.runtimeCache.GetPods()
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if err != nil {
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f.t.Errorf("Unexpected error: %v", err)
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}
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if err := f.syncPodFn(pod, mirrorPod, kubecontainer.Pods(pods).FindPodByID(pod.UID), SyncPodUpdate); err != nil {
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f.t.Errorf("Unexpected error: %v", err)
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}
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}
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func (f *fakePodWorkers) ForgetNonExistingPodWorkers(desiredPods map[types.UID]empty) {}
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func (f *fakePodWorkers) ForgetWorker(uid types.UID) {}
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type TestingInterface interface {
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Errorf(format string, args ...interface{})
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}
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