"fmt"
"net"
"os"
"os/exec"
"code.cloudfoundry.org/guardian/kawasaki/devices"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/onsi/gomega/gexec"
"github.com/vishvananda/netlink"
)
var _ = Describe("Link Management", func() {
var (
l devices.Link
name string
intf *net.Interface
)
BeforeEach(func() {
cmd, err := gexec.Start(exec.Command("sh", "-c", "mountpoint /sys || mount -t sysfs sysfs /sys"), GinkgoWriter, GinkgoWriter)
Expect(err).ToNot(HaveOccurred())
Eventually(cmd).Should(gexec.Exit(0))
name = fmt.Sprintf("gdn-test-%d", GinkgoParallelNode())
link := &netlink.GenericLink{
LinkAttrs: netlink.LinkAttrs{Name: name},
LinkType: "dummy",
}
Expect(netlink.LinkAdd(link)).To(Succeed())
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)
}
})
}