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package main
import (
"fmt"
"io/ioutil"
"os"
"os/signal"
"syscall"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
kexec "k8s.io/utils/exec"
"ovn4nfv-k8s-plugin/internal/pkg/config"
"ovn4nfv-k8s-plugin/internal/pkg/factory"
"ovn4nfv-k8s-plugin/internal/pkg/ovn"
"ovn4nfv-k8s-plugin/internal/pkg/util"
)
func main() {
c := cli.NewApp()
c.Name = "ovn4nfvk8s"
c.Usage = "run ovn4nfvk8s to start pod watchers"
c.Version = config.Version
c.Flags = append([]cli.Flag{
// Daemon file
cli.StringFlag{
Name: "pidfile",
Usage: "Name of file that will hold the ovn4nfvk8s pid (optional)",
},
}, config.Flags...)
c.Action = func(c *cli.Context) error {
return runOvnKube(c)
}
if err := c.Run(os.Args); err != nil {
logrus.Fatal(err)
}
}
func delPidfile(pidfile string) {
if pidfile != "" {
if _, err := os.Stat(pidfile); err == nil {
if err := os.Remove(pidfile); err != nil {
logrus.Errorf("%s delete failed: %v", pidfile, err)
}
}
}
}
func runOvnKube(ctx *cli.Context) error {
fmt.Println("ovn4nfvk8s started")
exec := kexec.New()
_, err := config.InitConfig(ctx, exec, nil)
if err != nil {
return err
}
pidfile := ctx.String("pidfile")
c := make(chan os.Signal, 2)
signal.Notify(c, os.Interrupt, syscall.SIGTERM)
go func() {
<-c
delPidfile(pidfile)
os.Exit(1)
}()
defer delPidfile(pidfile)
if pidfile != "" {
// need to test if already there
_, err := os.Stat(pidfile)
// Create if it doesn't exist, else exit with error
if os.IsNotExist(err) {
if err := ioutil.WriteFile(pidfile, []byte(fmt.Sprintf("%d", os.Getpid())), 0644); err != nil {
logrus.Errorf("failed to write pidfile %s (%v). Ignoring..", pidfile, err)
}
} else {
// get the pid and see if it exists
pid, err := ioutil.ReadFile(pidfile)
if err != nil {
logrus.Errorf("pidfile %s exists but can't be read", pidfile)
return err
}
_, err1 := os.Stat("/proc/" + string(pid[:]) + "/cmdline")
if os.IsNotExist(err1) {
// Left over pid from dead process
if err := ioutil.WriteFile(pidfile, []byte(fmt.Sprintf("%d", os.Getpid())), 0644); err != nil {
logrus.Errorf("failed to write pidfile %s (%v). Ignoring..", pidfile, err)
}
} else {
logrus.Errorf("pidfile %s exists and ovn4nfvk8s is running", pidfile)
os.Exit(1)
}
}
}
if err = util.SetExec(exec); err != nil {
logrus.Errorf("Failed to initialize exec helper: %v", err)
return err
}
clientset, err := config.NewClientset(&config.Kubernetes)
if err != nil {
panic(err.Error())
}
// Create distributed router and gateway for the deployment
err = ovn.SetupMaster("ovn4nfv-master")
if err != nil {
logrus.Errorf(err.Error())
panic(err.Error())
}
// create factory and start the ovn controller
stopChan := make(chan struct{})
factory, err := factory.NewWatchFactory(clientset, stopChan)
if err != nil {
panic(err.Error)
}
ovnController := ovn.NewOvnController(clientset, factory)
if err := ovnController.Run(); err != nil {
logrus.Errorf(err.Error())
panic(err.Error())
}
// run forever
select {}
return nil
}
|
