1 /* 2 Copyright 2020 The Kubernetes Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package memorymanager 18 19 import ( 20 v1 "k8s.io/api/core/v1" 21 "k8s.io/kubernetes/pkg/kubelet/cm/memorymanager/state" 22 "k8s.io/kubernetes/pkg/kubelet/cm/topologymanager" 23 ) 24 25 const policyTypeNone policyType = "None" 26 27 // none is implementation of the policy interface for the none policy, using none 28 // policy is the same as disable memory management 29 type none struct{} 30 31 var _ Policy = &none{} 32 33 // NewPolicyNone returns new none policy instance 34 func NewPolicyNone() Policy { 35 return &none{} 36 } 37 38 func (p *none) Name() string { 39 return string(policyTypeNone) 40 } 41 42 func (p *none) Start(s state.State) error { 43 return nil 44 } 45 46 // Allocate call is idempotent 47 func (p *none) Allocate(s state.State, pod *v1.Pod, container *v1.Container) error { 48 return nil 49 } 50 51 // RemoveContainer call is idempotent 52 func (p *none) RemoveContainer(s state.State, podUID string, containerName string) { 53 } 54 55 // GetTopologyHints implements the topologymanager.HintProvider Interface 56 // and is consulted to achieve NUMA aware resource alignment among this 57 // and other resource controllers. 58 func (p *none) GetTopologyHints(s state.State, pod *v1.Pod, container *v1.Container) map[string][]topologymanager.TopologyHint { 59 return nil 60 } 61 62 // GetPodTopologyHints implements the topologymanager.HintProvider Interface 63 // and is consulted to achieve NUMA aware resource alignment among this 64 // and other resource controllers. 65 func (p *none) GetPodTopologyHints(s state.State, pod *v1.Pod) map[string][]topologymanager.TopologyHint { 66 return nil 67 } 68 69 // GetAllocatableMemory returns the amount of allocatable memory for each NUMA node 70 func (p *none) GetAllocatableMemory(s state.State) []state.Block { 71 return []state.Block{} 72 } 73