mirror of
https://github.com/k3s-io/kubernetes.git
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293 lines
9.5 KiB
Go
293 lines
9.5 KiB
Go
/*
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Copyright 2017 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 devicemanager
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import (
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"k8s.io/klog"
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"k8s.io/apimachinery/pkg/util/sets"
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pluginapi "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
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podresourcesapi "k8s.io/kubernetes/pkg/kubelet/apis/podresources/v1alpha1"
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"k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/checkpoint"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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)
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type deviceAllocateInfo struct {
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// deviceIds contains device Ids allocated to this container for the given resourceName.
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deviceIds sets.String
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// allocResp contains cached rpc AllocateResponse.
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allocResp *pluginapi.ContainerAllocateResponse
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}
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type resourceAllocateInfo map[string]deviceAllocateInfo // Keyed by resourceName.
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type containerDevices map[string]resourceAllocateInfo // Keyed by containerName.
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type podDevices map[string]containerDevices // Keyed by podUID.
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func (pdev podDevices) pods() sets.String {
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ret := sets.NewString()
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for k := range pdev {
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ret.Insert(k)
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}
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return ret
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}
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func (pdev podDevices) insert(podUID, contName, resource string, devices sets.String, resp *pluginapi.ContainerAllocateResponse) {
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if _, podExists := pdev[podUID]; !podExists {
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pdev[podUID] = make(containerDevices)
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}
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if _, contExists := pdev[podUID][contName]; !contExists {
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pdev[podUID][contName] = make(resourceAllocateInfo)
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}
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pdev[podUID][contName][resource] = deviceAllocateInfo{
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deviceIds: devices,
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allocResp: resp,
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}
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}
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func (pdev podDevices) delete(pods []string) {
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for _, uid := range pods {
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delete(pdev, uid)
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}
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}
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// Returns list of device Ids allocated to the given container for the given resource.
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// Returns nil if we don't have cached state for the given <podUID, contName, resource>.
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func (pdev podDevices) containerDevices(podUID, contName, resource string) sets.String {
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if _, podExists := pdev[podUID]; !podExists {
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return nil
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}
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if _, contExists := pdev[podUID][contName]; !contExists {
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return nil
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}
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devs, resourceExists := pdev[podUID][contName][resource]
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if !resourceExists {
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return nil
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}
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return devs.deviceIds
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}
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// Populates allocatedResources with the device resources allocated to the specified <podUID, contName>.
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func (pdev podDevices) addContainerAllocatedResources(podUID, contName string, allocatedResources map[string]sets.String) {
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containers, exists := pdev[podUID]
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if !exists {
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return
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}
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resources, exists := containers[contName]
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if !exists {
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return
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}
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for resource, devices := range resources {
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allocatedResources[resource] = allocatedResources[resource].Union(devices.deviceIds)
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}
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}
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// Removes the device resources allocated to the specified <podUID, contName> from allocatedResources.
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func (pdev podDevices) removeContainerAllocatedResources(podUID, contName string, allocatedResources map[string]sets.String) {
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containers, exists := pdev[podUID]
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if !exists {
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return
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}
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resources, exists := containers[contName]
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if !exists {
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return
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}
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for resource, devices := range resources {
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allocatedResources[resource] = allocatedResources[resource].Difference(devices.deviceIds)
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}
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}
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// Returns all of devices allocated to the pods being tracked, keyed by resourceName.
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func (pdev podDevices) devices() map[string]sets.String {
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ret := make(map[string]sets.String)
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for _, containerDevices := range pdev {
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for _, resources := range containerDevices {
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for resource, devices := range resources {
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if _, exists := ret[resource]; !exists {
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ret[resource] = sets.NewString()
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}
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if devices.allocResp != nil {
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ret[resource] = ret[resource].Union(devices.deviceIds)
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}
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}
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}
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}
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return ret
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}
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// Turns podDevices to checkpointData.
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func (pdev podDevices) toCheckpointData() []checkpoint.PodDevicesEntry {
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var data []checkpoint.PodDevicesEntry
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for podUID, containerDevices := range pdev {
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for conName, resources := range containerDevices {
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for resource, devices := range resources {
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devIds := devices.deviceIds.UnsortedList()
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if devices.allocResp == nil {
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klog.Errorf("Can't marshal allocResp for %v %v %v: allocation response is missing", podUID, conName, resource)
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continue
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}
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allocResp, err := devices.allocResp.Marshal()
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if err != nil {
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klog.Errorf("Can't marshal allocResp for %v %v %v: %v", podUID, conName, resource, err)
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continue
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}
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data = append(data, checkpoint.PodDevicesEntry{
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PodUID: podUID,
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ContainerName: conName,
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ResourceName: resource,
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DeviceIDs: devIds,
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AllocResp: allocResp})
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}
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}
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}
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return data
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}
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// Populates podDevices from the passed in checkpointData.
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func (pdev podDevices) fromCheckpointData(data []checkpoint.PodDevicesEntry) {
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for _, entry := range data {
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klog.V(2).Infof("Get checkpoint entry: %v %v %v %v %v\n",
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entry.PodUID, entry.ContainerName, entry.ResourceName, entry.DeviceIDs, entry.AllocResp)
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devIDs := sets.NewString()
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for _, devID := range entry.DeviceIDs {
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devIDs.Insert(devID)
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}
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allocResp := &pluginapi.ContainerAllocateResponse{}
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err := allocResp.Unmarshal(entry.AllocResp)
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if err != nil {
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klog.Errorf("Can't unmarshal allocResp for %v %v %v: %v", entry.PodUID, entry.ContainerName, entry.ResourceName, err)
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continue
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}
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pdev.insert(entry.PodUID, entry.ContainerName, entry.ResourceName, devIDs, allocResp)
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}
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}
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// Returns combined container runtime settings to consume the container's allocated devices.
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func (pdev podDevices) deviceRunContainerOptions(podUID, contName string) *DeviceRunContainerOptions {
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containers, exists := pdev[podUID]
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if !exists {
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return nil
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}
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resources, exists := containers[contName]
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if !exists {
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return nil
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}
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opts := &DeviceRunContainerOptions{}
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// Maps to detect duplicate settings.
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devsMap := make(map[string]string)
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mountsMap := make(map[string]string)
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envsMap := make(map[string]string)
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annotationsMap := make(map[string]string)
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// Loops through AllocationResponses of all cached device resources.
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for _, devices := range resources {
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resp := devices.allocResp
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// Each Allocate response has the following artifacts.
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// Environment variables
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// Mount points
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// Device files
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// Container annotations
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// These artifacts are per resource per container.
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// Updates RunContainerOptions.Envs.
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for k, v := range resp.Envs {
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if e, ok := envsMap[k]; ok {
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klog.V(4).Infof("Skip existing env %s %s", k, v)
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if e != v {
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klog.Errorf("Environment variable %s has conflicting setting: %s and %s", k, e, v)
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}
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continue
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}
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klog.V(4).Infof("Add env %s %s", k, v)
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envsMap[k] = v
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opts.Envs = append(opts.Envs, kubecontainer.EnvVar{Name: k, Value: v})
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}
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// Updates RunContainerOptions.Devices.
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for _, dev := range resp.Devices {
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if d, ok := devsMap[dev.ContainerPath]; ok {
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klog.V(4).Infof("Skip existing device %s %s", dev.ContainerPath, dev.HostPath)
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if d != dev.HostPath {
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klog.Errorf("Container device %s has conflicting mapping host devices: %s and %s",
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dev.ContainerPath, d, dev.HostPath)
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}
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continue
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}
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klog.V(4).Infof("Add device %s %s", dev.ContainerPath, dev.HostPath)
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devsMap[dev.ContainerPath] = dev.HostPath
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opts.Devices = append(opts.Devices, kubecontainer.DeviceInfo{
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PathOnHost: dev.HostPath,
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PathInContainer: dev.ContainerPath,
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Permissions: dev.Permissions,
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})
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}
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// Updates RunContainerOptions.Mounts.
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for _, mount := range resp.Mounts {
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if m, ok := mountsMap[mount.ContainerPath]; ok {
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klog.V(4).Infof("Skip existing mount %s %s", mount.ContainerPath, mount.HostPath)
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if m != mount.HostPath {
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klog.Errorf("Container mount %s has conflicting mapping host mounts: %s and %s",
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mount.ContainerPath, m, mount.HostPath)
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}
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continue
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}
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klog.V(4).Infof("Add mount %s %s", mount.ContainerPath, mount.HostPath)
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mountsMap[mount.ContainerPath] = mount.HostPath
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opts.Mounts = append(opts.Mounts, kubecontainer.Mount{
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Name: mount.ContainerPath,
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ContainerPath: mount.ContainerPath,
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HostPath: mount.HostPath,
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ReadOnly: mount.ReadOnly,
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// TODO: This may need to be part of Device plugin API.
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SELinuxRelabel: false,
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})
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}
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// Updates for Annotations
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for k, v := range resp.Annotations {
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if e, ok := annotationsMap[k]; ok {
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klog.V(4).Infof("Skip existing annotation %s %s", k, v)
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if e != v {
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klog.Errorf("Annotation %s has conflicting setting: %s and %s", k, e, v)
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}
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continue
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}
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klog.V(4).Infof("Add annotation %s %s", k, v)
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annotationsMap[k] = v
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opts.Annotations = append(opts.Annotations, kubecontainer.Annotation{Name: k, Value: v})
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}
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}
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return opts
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}
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// getContainerDevices returns the devices assigned to the provided container for all ResourceNames
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func (pdev podDevices) getContainerDevices(podUID, contName string) []*podresourcesapi.ContainerDevices {
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if _, podExists := pdev[podUID]; !podExists {
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return nil
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}
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if _, contExists := pdev[podUID][contName]; !contExists {
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return nil
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}
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cDev := []*podresourcesapi.ContainerDevices{}
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for resource, allocateInfo := range pdev[podUID][contName] {
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cDev = append(cDev, &podresourcesapi.ContainerDevices{
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ResourceName: resource,
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DeviceIds: allocateInfo.deviceIds.UnsortedList(),
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})
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}
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return cDev
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}
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