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- /*
- Copyright 2016 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 antiaffinity provides the LimitPodHardAntiAffinityTopology
- // admission controller. It rejects any pod that specifies "hard"
- // (RequiredDuringScheduling) anti-affinity with a TopologyKey other
- // than v1.LabelHostname. Because anti-affinity is symmetric, without
- // this admission controller, a user could maliciously or accidentally
- // specify that their pod (once it has scheduled) should block other
- // pods from scheduling into the same zone or some other large
- // topology, essentially DoSing the cluster. In the future we will
- // address this problem more fully by using quota and priority, but
- // for now this admission controller provides a simple protection, on
- // the assumption that the only legitimate use of hard pod
- // anti-affinity is to exclude other pods from the same node.
- package antiaffinity // import "k8s.io/kubernetes/plugin/pkg/admission/antiaffinity"
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