diff --git a/components/engine/integration/container/nat_test.go b/components/engine/integration/container/nat_test.go new file mode 100644 index 0000000000..5ac838a2bd --- /dev/null +++ b/components/engine/integration/container/nat_test.go @@ -0,0 +1,147 @@ +package container + +import ( + "bytes" + "context" + "fmt" + "io" + "io/ioutil" + "net" + "strings" + "testing" + "time" + + "github.com/docker/docker/api/types" + "github.com/docker/docker/api/types/container" + "github.com/docker/docker/api/types/network" + "github.com/docker/docker/integration/util/request" + "github.com/docker/go-connections/nat" + "github.com/gotestyourself/gotestyourself/poll" + "github.com/gotestyourself/gotestyourself/skip" + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" +) + +func TestNetworkNat(t *testing.T) { + skip.If(t, !testEnv.IsLocalDaemon()) + + defer setupTest(t)() + + msg := "it works" + startServerContainer(t, msg, 8080) + + endpoint := getExternalAddress(t) + conn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", endpoint.String(), 8080)) + require.NoError(t, err) + defer conn.Close() + + data, err := ioutil.ReadAll(conn) + require.NoError(t, err) + assert.Equal(t, strings.TrimSpace(string(data)), msg) +} + +func TestNetworkLocalhostTCPNat(t *testing.T) { + skip.If(t, !testEnv.IsLocalDaemon()) + + defer setupTest(t)() + + msg := "hi yall" + startServerContainer(t, msg, 8081) + + conn, err := net.Dial("tcp", "localhost:8081") + require.NoError(t, err) + defer conn.Close() + + data, err := ioutil.ReadAll(conn) + require.NoError(t, err) + assert.Equal(t, strings.TrimSpace(string(data)), msg) +} + +func TestNetworkLoopbackNat(t *testing.T) { + skip.If(t, !testEnv.IsLocalDaemon()) + + msg := "it works" + startServerContainer(t, msg, 8080) + + endpoint := getExternalAddress(t) + + client := request.NewAPIClient(t) + ctx := context.Background() + c, err := client.ContainerCreate(ctx, + &container.Config{ + Image: "busybox", + Cmd: []string{"sh", "-c", fmt.Sprintf("stty raw && nc -w 5 %s 8080", endpoint.String())}, + Tty: true, + }, + &container.HostConfig{ + NetworkMode: "container:server", + }, + nil, + "") + require.NoError(t, err) + + err = client.ContainerStart(ctx, c.ID, types.ContainerStartOptions{}) + require.NoError(t, err) + + poll.WaitOn(t, containerIsStopped(ctx, client, c.ID), poll.WithDelay(100*time.Millisecond)) + + body, err := client.ContainerLogs(ctx, c.ID, types.ContainerLogsOptions{ + ShowStdout: true, + }) + require.NoError(t, err) + defer body.Close() + + var b bytes.Buffer + _, err = io.Copy(&b, body) + require.NoError(t, err) + + assert.Equal(t, strings.TrimSpace(b.String()), msg) +} + +func startServerContainer(t *testing.T, msg string, port int) string { + client := request.NewAPIClient(t) + ctx := context.Background() + + c, err := client.ContainerCreate(ctx, + &container.Config{ + Image: "busybox", + Cmd: []string{"sh", "-c", fmt.Sprintf("echo %q | nc -lp %d", msg, port)}, + ExposedPorts: map[nat.Port]struct{}{ + nat.Port(fmt.Sprintf("%d/tcp", port)): {}, + }, + }, + &container.HostConfig{ + PortBindings: nat.PortMap{ + nat.Port(fmt.Sprintf("%d/tcp", port)): []nat.PortBinding{ + { + HostPort: fmt.Sprintf("%d", port), + }, + }, + }, + }, + &network.NetworkingConfig{}, + "server", + ) + require.NoError(t, err) + + err = client.ContainerStart(ctx, c.ID, types.ContainerStartOptions{}) + require.NoError(t, err) + + poll.WaitOn(t, containerIsInState(ctx, client, c.ID, "running"), poll.WithDelay(100*time.Millisecond)) + + return c.ID +} + +func getExternalAddress(t *testing.T) net.IP { + iface, err := net.InterfaceByName("eth0") + skip.If(t, err != nil, "Test not running with `make test-integration`. Interface eth0 not found: %s", err) + + ifaceAddrs, err := iface.Addrs() + require.NoError(t, err) + assert.NotEqual(t, len(ifaceAddrs), 0) + + ifaceIP, _, err := net.ParseCIDR(ifaceAddrs[0].String()) + require.NoError(t, err) + + return ifaceIP +}