mirror of
https://github.com/intel/intel-device-plugins-for-kubernetes.git
synced 2025-06-03 03:59:37 +00:00
142 lines
3.2 KiB
Go
142 lines
3.2 KiB
Go
// Copyright 2020 Intel Corporation. All Rights Reserved.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package main
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import (
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"context"
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"encoding/json"
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"flag"
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"fmt"
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"os"
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"os/signal"
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"syscall"
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"github.com/klauspost/cpuid/v2"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/rest"
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"k8s.io/klog/v2"
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)
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const (
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namespace = "sgx.intel.com"
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epc = "epc"
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capable = "capable"
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)
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type patchNodeOp struct {
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Value interface{} `json:"value"`
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Op string `json:"op"`
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Path string `json:"path"`
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}
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func main() {
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var register, affirm, label, daemon bool
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flag.BoolVar(®ister, "register", false, "register EPC as extended resource")
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flag.BoolVar(&affirm, "affirm", false, "return error if EPC is not available")
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flag.BoolVar(&label, "node-label", false, "create node label")
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flag.BoolVar(&daemon, "daemon", false, "run as a daemon")
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flag.Parse()
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klog.Infof("starting sgx_epchook")
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// get the EPC size
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var epcSize uint64
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if cpuid.CPU.SGX.Available {
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for _, s := range cpuid.CPU.SGX.EPCSections {
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epcSize += s.EPCSize
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}
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}
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klog.Infof("epc capacity: %d bytes", epcSize)
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if epcSize == 0 && affirm {
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klog.Fatal("SGX EPC is not available")
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}
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if err := updateNode(epcSize, register, label); err != nil {
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klog.Fatal(err.Error())
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}
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// if the "register" flag is FALSE, we assume that sgx_epchook is used as NFD hook
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if !register {
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fmt.Printf("%s/%s=%d", namespace, epc, epcSize)
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}
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if daemon {
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klog.Info("waiting for termination signal")
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term := make(chan os.Signal, 1)
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signal.Notify(term, os.Interrupt, syscall.SIGTERM)
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<-term
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}
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}
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func updateNode(epcSize uint64, register, label bool) error {
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// create patch payload
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payload := []patchNodeOp{}
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if register {
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payload = append(payload, patchNodeOp{
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Op: "add",
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Path: fmt.Sprintf("/status/capacity/%s~1%s", namespace, epc),
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Value: epcSize,
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})
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}
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if label && epcSize > 0 {
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payload = append(payload, patchNodeOp{
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Op: "add",
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Path: fmt.Sprintf("/metadata/labels/%s~1%s", namespace, capable),
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Value: "true",
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})
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}
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if len(payload) == 0 {
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return nil
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}
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payloadBytes, err := json.Marshal(payload)
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if err != nil {
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return err
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}
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// create the in-cluster config
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config, err := rest.InClusterConfig()
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if err != nil {
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return err
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}
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// create the clientset
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clientset, err := kubernetes.NewForConfig(config)
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if err != nil {
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return err
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}
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// get the node object
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node, err := clientset.CoreV1().Nodes().Get(context.TODO(), os.Getenv("NODE_NAME"), metav1.GetOptions{})
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if err != nil {
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return err
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}
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// patch the node
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_, err = clientset.CoreV1().Nodes().Patch(context.TODO(), node.Name, types.JSONPatchType, payloadBytes, metav1.PatchOptions{}, "status")
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return err
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}
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