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main.go
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main.go
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// Copyright 2018-2022 Xilinx Corporation. All Rights Reserved.
// Author: Brian Xu(brianx@xilinx.com)
// For technical support, please contact k8s_dev@amd.com
//
// 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 main
import (
"flag"
"fmt"
log "github.com/Sirupsen/logrus"
"github.com/fsnotify/fsnotify"
"io/ioutil"
pluginapi "k8s.io/kubernetes/pkg/kubelet/apis/deviceplugin/v1beta1"
"os"
"strings"
"syscall"
)
var (
U30NameConvention = "CommonName"
U30AllocUnit = "Card"
)
func main() {
// Parse command-line arguments
flag.CommandLine = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
flagLogLevel := flag.String("log-level", "info", "Define the logging level: error, info, debug.")
flag.Parse()
switch *flagLogLevel {
case "debug":
log.SetLevel(log.DebugLevel)
case "info":
log.SetLevel(log.InfoLevel)
}
version_path := "/opt/xilinx/k8s-fpga-device-plugin/version_num"
if version_file, err := ioutil.ReadFile(version_path); err != nil {
fmt.Errorf("Can't read version file %s", version_path)
} else {
version := strings.Trim(string(version_file), "\n")
log.Println("Plugin Version:", version)
}
ReadNameType := os.Getenv("U30NameConvention")
if strings.EqualFold(ReadNameType, "ExactName") {
log.Println("Set U30NameConvention: ExactName")
U30NameConvention = "ExactName"
} else {
log.Println("Set U30NameConvention: CommonName")
U30NameConvention = "CommonName"
}
ReadAllocUnitType := os.Getenv("U30AllocUnit")
if strings.EqualFold(ReadAllocUnitType, "Device") {
log.Println("Set U30AllocUnit: Device")
U30AllocUnit = "Device"
} else {
log.Println("Set U30AllocUnit: Card")
U30AllocUnit = "Card"
}
log.Println("Starting FS watcher.")
watcher, err := newFSWatcher(pluginapi.DevicePluginPath)
if err != nil {
log.Printf("Failed to created FS watcher: %s.", err)
os.Exit(1)
}
defer watcher.Close()
log.Println("Starting OS watcher.")
sigs := newOSWatcher(syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
restart := true
var devicePlugin *FPGADevicePlugin
L:
for {
if restart {
devicePlugin = NewFPGADevicePlugin()
restart = false
}
select {
case update := <-devicePlugin.updateChan:
devicePlugin.checkDeviceUpdate(update)
case event := <-watcher.Events:
if event.Name == pluginapi.KubeletSocket && event.Op&fsnotify.Create == fsnotify.Create {
log.Printf("inotify: %s created, restarting.", pluginapi.KubeletSocket)
restart = true
}
case err := <-watcher.Errors:
log.Printf("inotify: %s", err)
case s := <-sigs:
switch s {
case syscall.SIGHUP:
log.Println("Received SIGHUP, restarting.")
restart = true
default:
log.Printf("Received signal \"%v\", shutting down.", s)
break L
}
}
}
}