53 lines
888 B
Go
53 lines
888 B
Go
package libnetwork
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import (
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"os"
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"runtime"
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"syscall"
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log "github.com/Sirupsen/logrus"
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"github.com/vishvananda/netlink"
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)
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func reexecCreateNamespace() {
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runtime.LockOSThread()
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if len(os.Args) < 2 {
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log.Fatalf("no namespace path provided")
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}
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if err := createNamespaceFile(os.Args[1]); err != nil {
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log.Fatal(err)
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}
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if err := syscall.Unshare(syscall.CLONE_NEWNET); err != nil {
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log.Fatal(err)
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}
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if err := loopbackUp(); err != nil {
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log.Fatal(err)
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}
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if err := syscall.Mount("/proc/self/ns/net", os.Args[1], "bind", syscall.MS_BIND, ""); err != nil {
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log.Fatal(err)
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}
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os.Exit(0)
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}
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func createNamespaceFile(path string) (err error) {
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var f *os.File
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if f, err = os.Create(path); err == nil {
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f.Close()
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}
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return err
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}
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func loopbackUp() error {
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iface, err := netlink.LinkByName("lo")
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if err != nil {
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return err
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}
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return netlink.LinkSetUp(iface)
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}
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