Daemon process

Makefile

@@ -62,7 +62,8 @@ print-%							:
 # perform go build on project
 go-build						:
 								go build -o bin/hostnic $(GO_BUILD_FLAGS) $(GIT_REPOSITORY)/cmd/hostnic/
-								go build -o bin/nicclearner $(GO_BUILD_FLAGS) $(GIT_REPOSITORY)/cmd/niccleaner/
+								go build -o bin/daemon $(GO_BUILD_FLAGS) $(GIT_REPOSITORY)/cmd/daemon/
 
 
-.PHONY							: default all go-build
+
+.PHONY							: default all go-build

cmd/daemon/cmd/root.go

@@ -0,0 +1,104 @@
+// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
+// 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 cmd
+
+import (
+	"fmt"
+	"os"
+
+	homedir "github.com/mitchellh/go-homedir"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	log "github.com/sirupsen/logrus"
+)
+
+var cfgFile string
+var logLevel string
+
+// RootCmd represents the base command when called without any subcommands
+var RootCmd = &cobra.Command{
+	Use:   "daemon",
+	Short: "A brief description of your application",
+	Long: `A longer description that spans multiple lines and likely contains
+examples and usage of using your application. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.`,
+	// Uncomment the following line if your bare application
+	// has an action associated with it:
+	//	Run: func(cmd *cobra.Command, args []string) { },
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	if err := RootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+
+	// Here you will define your flags and configuration settings.
+	// Cobra supports persistent flags, which, if defined here,
+	// will be global for your application.
+	RootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.daemon.yaml)")
+	RootCmd.PersistentFlags().StringVar(&logLevel, "loglevel", "info","daemon process log level(debug,info,warn,error)")
+
+	// Cobra also supports local flags, which will only run
+	// when this action is called directly.
+	RootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}
+
+// initConfig reads in config file and ENV variables if set.
+func initConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		// Find home directory.
+		home, err := homedir.Dir()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		// Search config in home directory with name ".daemon" (without extension).
+		viper.AddConfigPath(home)
+		viper.SetConfigName(".daemon")
+	}
+
+	viper.AutomaticEnv() // read in environment variables that match
+
+	// If a config file is found, read it in.
+	if err := viper.ReadInConfig(); err == nil {
+		fmt.Println("Using config file:", viper.ConfigFileUsed())
+	}
+
+	switch logLevel {
+	case "debug":
+		log.SetLevel(log.DebugLevel)
+	case "info":
+		log.SetLevel(log.InfoLevel)
+	case "warn":
+		log.SetLevel(log.WarnLevel)
+	case "error":
+		log.SetLevel(log.ErrorLevel)
+	default:
+		log.SetLevel(log.InfoLevel)
+	}
+}

cmd/daemon/cmd/start.go

@@ -0,0 +1,127 @@
+// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
+// 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 cmd
+
+import (
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"github.com/yunify/hostnic-cni/pkg/messages"
+	"github.com/yunify/hostnic-cni/pkg/provider/qingcloud"
+	"github.com/yunify/hostnic-cni/pkg/server"
+	"google.golang.org/grpc"
+	"net"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+const (
+	gracefulTimeout = 120 * time.Second
+)
+
+// startCmd represents the start command
+var startCmd = &cobra.Command{
+	Use:   "start",
+	Short: "A brief description of your command",
+	Long: `A longer description that spans multiple lines and likely contains examples
+and usage of using your command. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		resourceProvider, err := qingcloud.NewQCNicProvider(viper.GetString("QyAccessFilePath"), viper.GetStringSlice("vxnets"))
+		if err != nil {
+			log.Errorf("Failed to initiate resource provider, %v", err)
+		}
+
+		//setup nic pool
+		nicpool, err := server.NewNicPool(viper.GetInt("PoolSize"), resourceProvider)
+		if err != nil {
+			log.Errorf("Failed to create pool. %v", err)
+			return
+		}
+		//start up server rpc routine
+		listener, err := net.Listen("tcp", viper.GetString("bindAddr"))
+		if err != nil {
+			log.Errorf("Failed to listen to assigned port, %v", err)
+			return
+		}
+		grpcServer := grpc.NewServer()
+		messages.RegisterNicservicesServer(grpcServer, server.NewDaemonServerHandler(nicpool))
+		go grpcServer.Serve(listener)
+
+		signalCh := make(chan os.Signal, 4)
+		signal.Notify(signalCh, os.Interrupt, syscall.SIGTERM, syscall.SIGHUP)
+		var sig os.Signal
+
+	WAIT:
+		select {
+		case s := <-signalCh:
+			sig = s
+		}
+
+		if sig == syscall.SIGHUP {
+			//TODO implement refresh config logic
+			goto WAIT
+		}
+		//Attempt a graceful shutdown
+
+		log.Infof("Got interrupt call, graceful shutdown...")
+		gracefulCh := make(chan struct{})
+		go func() {
+			log.Infof("Shutdown grpc server")
+			grpcServer.GracefulStop()
+			log.Infof("Shutdown nic pool server")
+			nicpool.ShutdownNicPool()
+			close(gracefulCh)
+		}()
+
+		select {
+		case <-signalCh:
+			return
+		case <-time.After(gracefulTimeout):
+			return
+		case <-gracefulCh:
+			return
+		}
+	},
+}
+
+func init() {
+	RootCmd.AddCommand(startCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// startCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// startCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+
+	//server routine properties
+	startCmd.Flags().String("bindAddr", ":31080", "port of daemon process(e.g. socket port 127.0.0.1:31080 [fe80::1%lo0]:80 )")
+
+	//sdk properties
+	startCmd.Flags().String("QyAccessFilePath", "/etc/qingcloud/client.yaml", "Path of QingCloud Access file")
+	startCmd.Flags().StringSlice("vxnets", []string{}, "ids of vxnet")
+
+	//pool properties
+	startCmd.Flags().Int("PoolSize", 3, "The size of nic pool")
+	viper.BindPFlags(startCmd.Flags())
+}

cmd/daemon/cmd/version.go

@@ -0,0 +1,52 @@
+// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
+// 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 cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/yunify/hostnic-cni/pkg"
+)
+
+// versionCmd represents the version command
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "A brief description of your command",
+	Long: `A longer description that spans multiple lines and likely contains examples
+and usage of using your command. For example:
+
+Cobra is a CLI library for Go that empowers applications.
+This application is a tool to generate the needed files
+to quickly create a Cobra application.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Printf("VERSION: %s\n", pkg.VERSION)
+		fmt.Printf("GIT_SHA1: %s\n", pkg.GIT_SHA1)
+		fmt.Printf("BUILD_LABEL: %s\n", pkg.BUILD_LABEL)
+	},
+}
+
+func init() {
+	RootCmd.AddCommand(versionCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// versionCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// versionCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}

cmd/daemon/main.go

@@ -0,0 +1,20 @@
+// Copyright © 2017 NAME HERE <EMAIL ADDRESS>
+// 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 "github.com/yunify/hostnic-cni/cmd/daemon/cmd"
+
+func main() {
+	cmd.Execute()
+}