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kube-router.go
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kube-router.go
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package main
import (
"flag"
"fmt"
"net/http"
"os"
"time"
//nolint:gosec // we want to unconditionally expose pprof here for advanced troubleshooting scenarios
_ "net/http/pprof"
"github.com/cloudnativelabs/kube-router/v2/pkg/cmd"
"github.com/cloudnativelabs/kube-router/v2/pkg/options"
"github.com/cloudnativelabs/kube-router/v2/pkg/version"
"github.com/spf13/pflag"
"k8s.io/klog/v2"
)
func main() {
if err := Main(); err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err)
os.Exit(1)
}
os.Exit(0)
}
func Main() error {
klog.InitFlags(nil)
config := options.NewKubeRouterConfig()
config.AddFlags(pflag.CommandLine)
pflag.Parse()
// Workaround for this issue:
// https://github.com/kubernetes/kubernetes/issues/17162
err := flag.CommandLine.Parse([]string{})
if err != nil {
return fmt.Errorf("failed to parse flags: %s", err)
}
err = flag.Set("logtostderr", "true")
if err != nil {
return fmt.Errorf("failed to set flag: %s", err)
}
err = flag.Set("v", config.VLevel)
if err != nil {
return fmt.Errorf("failed to set flag: %s", err)
}
if config.HelpRequested {
pflag.Usage()
return nil
}
if config.Version {
version.PrintVersion(false)
return nil
}
if os.Geteuid() != 0 {
return fmt.Errorf("kube-router needs to be run with privileges to execute iptables, ipset and configure ipvs")
}
if config.CleanupConfig {
cmd.CleanupConfigAndExit()
return nil
}
kubeRouter, err := cmd.NewKubeRouterDefault(config)
if err != nil {
return fmt.Errorf("failed to parse kube-router config: %v", err)
}
if config.EnablePprof {
go func() {
server := http.Server{
Addr: "0.0.0.0:6060",
ReadHeaderTimeout: 5 * time.Second,
Handler: nil,
}
fmt.Fprintf(os.Stdout, "%s\n", server.ListenAndServe().Error())
}()
}
err = kubeRouter.Run()
if err != nil {
return fmt.Errorf("failed to run kube-router: %v", err)
}
return nil
}