It("should still succeed", func() {
Expect(l.SetUp(intf)).To(Succeed())
Expect(l.SetUp(intf)).To(Succeed())
intf, err := net.InterfaceByName(name)
Expect(err).ToNot(HaveOccurred())
Expect(intf.Flags & net.FlagUp).To(Equal(net.FlagUp))
})
})
})
})
Describe("SetMTU", func() {
Context("when the interface does not exist", func() {
It("returns an error", func() {
Expect(l.SetMTU(&net.Interface{Name: "something"}, 1234)).To(MatchError("devices: Link not found"))
})
})
Context("when the interface exists", func() {
It("sets the mtu", func() {
Expect(l.SetMTU(intf, 1234)).To(Succeed())
intf, err := net.InterfaceByName(name)
Expect(err).ToNot(HaveOccurred())
Expect(intf.MTU).To(Equal(1234))
})
})
})
Describe("SetNs", func() {
func init() {
reexec.Register("configure-container-netns", func() {
var netNsPath, containerIntf, containerIPStr, bridgeIPStr, subnetStr string
var mtu int
flag.StringVar(&netNsPath, "netNsPath", "", "netNsPath")
flag.StringVar(&containerIntf, "containerIntf", "", "containerIntf")
flag.StringVar(&containerIPStr, "containerIP", "", "containerIP")
flag.StringVar(&bridgeIPStr, "bridgeIP", "", "bridgeIP")
flag.StringVar(&subnetStr, "subnet", "", "subnet")
flag.IntVar(&mtu, "mtu", 0, "mtu")
flag.Parse()
fd, err := os.Open(netNsPath)
if err != nil {
fmt.Fprintf(os.Stderr, "opening netns `%s`: %s", netNsPath, err)
os.Exit(1)
}
defer fd.Close()
netNsExecer := &netns.Execer{}
if err = netNsExecer.Exec(fd, func() error {
containerIP := net.ParseIP(containerIPStr)
bridgeIP := net.ParseIP(bridgeIPStr)
_, subnetIPNet, err := net.ParseCIDR(subnetStr)
if err != nil {
panic(err)
}
link := devices.Link{}
intf, found, err := link.InterfaceByName(containerIntf)
if err != nil {
panic(err)
}
if !found {
return fmt.Errorf("interface `%s` was not found", containerIntf)
}
if err := link.AddIP(intf, containerIP, subnetIPNet); err != nil {
panic(err)
}
if err := link.SetUp(intf); err != nil {
panic(err)
}
if err := link.AddDefaultGW(intf, bridgeIP); err != nil {
panic(err)
}
if err := link.SetMTU(intf, mtu); err != nil {
panic(err)
}
return nil
}); err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
})
}