1/* 2Copyright 2019 The Kubernetes Authors. 3 4Licensed under the Apache License, Version 2.0 (the "License"); 5you may not use this file except in compliance with the License. 6You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10Unless required by applicable law or agreed to in writing, software 11distributed under the License is distributed on an "AS IS" BASIS, 12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13See the License for the specific language governing permissions and 14limitations under the License. 15*/ 16 17package containermap 18 19import ( 20 "fmt" 21) 22 23// ContainerMap maps (containerID)->(*v1.Pod, *v1.Container) 24type ContainerMap map[string]struct { 25 podUID string 26 containerName string 27} 28 29// NewContainerMap creates a new ContainerMap struct 30func NewContainerMap() ContainerMap { 31 return make(ContainerMap) 32} 33 34// Add adds a mapping of (containerID)->(podUID, containerName) to the ContainerMap 35func (cm ContainerMap) Add(podUID, containerName, containerID string) { 36 cm[containerID] = struct { 37 podUID string 38 containerName string 39 }{podUID, containerName} 40} 41 42// RemoveByContainerID removes a mapping of (containerID)->(podUID, containerName) from the ContainerMap 43func (cm ContainerMap) RemoveByContainerID(containerID string) { 44 delete(cm, containerID) 45} 46 47// RemoveByContainerRef removes a mapping of (containerID)->(podUID, containerName) from the ContainerMap 48func (cm ContainerMap) RemoveByContainerRef(podUID, containerName string) { 49 containerID, err := cm.GetContainerID(podUID, containerName) 50 if err == nil { 51 cm.RemoveByContainerID(containerID) 52 } 53} 54 55// GetContainerID retrieves a ContainerID from the ContainerMap 56func (cm ContainerMap) GetContainerID(podUID, containerName string) (string, error) { 57 for key, val := range cm { 58 if val.podUID == podUID && val.containerName == containerName { 59 return key, nil 60 } 61 } 62 return "", fmt.Errorf("container %s not in ContainerMap for pod %s", containerName, podUID) 63} 64 65// GetContainerRef retrieves a (podUID, containerName) pair from the ContainerMap 66func (cm ContainerMap) GetContainerRef(containerID string) (string, string, error) { 67 if _, exists := cm[containerID]; !exists { 68 return "", "", fmt.Errorf("containerID %s not in ContainerMap", containerID) 69 } 70 return cm[containerID].podUID, cm[containerID].containerName, nil 71} 72