func wireNetworker( log lager.Logger, tag string, networkPoolCIDR *net.IPNet, externalIP net.IP, iptablesMgr kawasaki.IPTablesConfigurer, interfacePrefix string, chainPrefix string, propManager *properties.Manager, networkModulePath string) gardener.Networker { runner := &logging.Runner{CommandRunner: linux_command_runner.New(), Logger: log.Session("network-runner")} hostConfigurer := &configure.Host{ Veth: &devices.VethCreator{}, Link: &devices.Link{Name: "guardian"}, Bridge: &devices.Bridge{}, Logger: log.Session("network-host-configurer"), } containerCfgApplier := &configure.Container{ Logger: log.Session("network-container-configurer"), Link: &devices.Link{Name: "guardian"}, } idGenerator := kawasaki.NewSequentialIDGenerator(time.Now().UnixNano()) portPool, err := ports.NewPool(uint32(*portPoolStart), uint32(*portPoolSize), ports.State{}) if err != nil { log.Fatal("invalid pool range", err) } switch networkModulePath { case "": return kawasaki.New( kawasaki.NewManager(runner, "/var/run/netns"), kawasaki.SpecParserFunc(kawasaki.ParseSpec), subnets.NewPool(networkPoolCIDR), kawasaki.NewConfigCreator(idGenerator, interfacePrefix, chainPrefix, externalIP), kawasaki.NewConfigurer( hostConfigurer, containerCfgApplier, iptablesMgr, &netns.Execer{}, ), propManager, iptables.NewPortForwarder(runner), portPool, ) default: if _, err := os.Stat(networkModulePath); err != nil { log.Fatal("failed-to-stat-network-module", err) return nil } return gardener.ForeignNetworkAdaptor{ ForeignNetworker: genclient.New(networkModulePath), } } }
var _ = Describe("NetnsMgr", func() { var ( fakeRunner *fake_command_runner.FakeCommandRunner netnsDir string mgr kawasaki.NetnsMgr logger lager.Logger ) BeforeEach(func() { netnsDir = tmpDir() logger = lagertest.NewTestLogger("test") }) JustBeforeEach(func() { fakeRunner = fake_command_runner.New() mgr = kawasaki.NewManager(fakeRunner, netnsDir) }) AfterEach(func() { os.RemoveAll(netnsDir) }) Describe("Creating a Network Namespace", func() { It("creates a namespace using 'ip netns add'", func() { Expect(mgr.Create(logger, "my-namespace")).To(Succeed()) Expect(fakeRunner).To(HaveExecutedSerially(fake_command_runner.CommandSpec{ Path: "ip", Args: []string{ "netns", "add", "my-namespace", },