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",
},