Example #1
0
func (cmd *GuardianCommand) wireNetworker(log lager.Logger, propManager kawasaki.ConfigStore, portPool *ports.PortPool) (gardener.Networker, gardener.Starter, error) {
	externalIP, err := defaultExternalIP(cmd.Network.ExternalIP)
	if err != nil {
		return nil, nil, err
	}

	dnsServers := make([]net.IP, len(cmd.Network.DNSServers))
	for i, ip := range cmd.Network.DNSServers {
		dnsServers[i] = ip.IP()
	}

	if cmd.Network.Plugin.Path() != "" {
		resolvConfigurer := &kawasaki.ResolvConfigurer{
			HostsFileCompiler:  &dns.HostsFileCompiler{},
			ResolvFileCompiler: &dns.ResolvFileCompiler{},
			FileWriter:         &dns.RootfsWriter{},
			IDMapReader:        &kawasaki.RootIdMapReader{},
		}
		externalNetworker := netplugin.New(
			linux_command_runner.New(),
			propManager,
			externalIP,
			dnsServers,
			resolvConfigurer,
			cmd.Network.Plugin.Path(),
			cmd.Network.PluginExtraArgs,
		)
		return externalNetworker, externalNetworker, nil
	}

	var denyNetworksList []string
	for _, network := range cmd.Network.DenyNetworks {
		denyNetworksList = append(denyNetworksList, network.String())
	}

	interfacePrefix := fmt.Sprintf("w%s", cmd.Server.Tag)
	chainPrefix := fmt.Sprintf("w-%s-", cmd.Server.Tag)
	idGenerator := kawasaki.NewSequentialIDGenerator(time.Now().UnixNano())
	iptRunner := &logging.Runner{CommandRunner: linux_command_runner.New(), Logger: log.Session("iptables-runner")}
	locksmith := &locksmithpkg.FileSystem{}
	ipTables := iptables.New(cmd.Bin.IPTables.Path(), cmd.Bin.IPTablesRestore.Path(), iptRunner, locksmith, chainPrefix)
	ipTablesStarter := iptables.NewStarter(ipTables, cmd.Network.AllowHostAccess, interfacePrefix, denyNetworksList, cmd.Containers.DestroyContainersOnStartup)
	ruleTranslator := iptables.NewRuleTranslator()

	networker := kawasaki.New(
		kawasaki.SpecParserFunc(kawasaki.ParseSpec),
		subnets.NewPool(cmd.Network.Pool.CIDR()),
		kawasaki.NewConfigCreator(idGenerator, interfacePrefix, chainPrefix, externalIP, dnsServers, cmd.Network.Mtu),
		propManager,
		factory.NewDefaultConfigurer(ipTables),
		portPool,
		iptables.NewPortForwarder(ipTables),
		iptables.NewFirewallOpener(ruleTranslator, ipTables),
	)

	return networker, ipTablesStarter, nil
}
	BeforeEach(func() {
		logger = lagertest.NewTestLogger("test")

		fakeRuleTranslator = new(fakes.FakeRuleTranslator)
		fakeRuleTranslator.TranslateRuleReturns([]iptables.Rule{
			iptables.SingleFilterRule{},
		}, nil)

		fakeIPTablesController = new(fakes.FakeIPTables)
		fakeIPTablesController.InstanceChainStub = func(chain string) string {
			return "prefix-" + chain
		}

		opener = iptables.NewFirewallOpener(
			fakeRuleTranslator, fakeIPTablesController,
		)
	})

	Describe("Open", func() {
		It("builds the correct rules", func() {
			rule := garden.NetOutRule{Protocol: garden.ProtocolUDP}
			Expect(opener.Open(logger, "foo-bar-baz", rule)).To(Succeed())
			Expect(fakeRuleTranslator.TranslateRuleArgsForCall(0)).To(Equal(rule))
		})

		Context("when building the rules fails", func() {
			BeforeEach(func() {
				fakeRuleTranslator.TranslateRuleReturns(nil, errors.New("failed to build rules"))
			})