github.com/scorpionis/docker@v1.6.0-rc7/integration-cli/docker_cli_nat_test.go (about)

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  	"net"
     6  	"os/exec"
     7  	"strings"
     8  	"testing"
     9  )
    10  
    11  func TestNetworkNat(t *testing.T) {
    12  	testRequires(t, SameHostDaemon, NativeExecDriver)
    13  	defer deleteAllContainers()
    14  
    15  	iface, err := net.InterfaceByName("eth0")
    16  	if err != nil {
    17  		t.Skipf("Test not running with `make test`. Interface eth0 not found: %s", err)
    18  	}
    19  
    20  	ifaceAddrs, err := iface.Addrs()
    21  	if err != nil || len(ifaceAddrs) == 0 {
    22  		t.Fatalf("Error retrieving addresses for eth0: %v (%d addresses)", err, len(ifaceAddrs))
    23  	}
    24  
    25  	ifaceIP, _, err := net.ParseCIDR(ifaceAddrs[0].String())
    26  	if err != nil {
    27  		t.Fatalf("Error retrieving the up for eth0: %s", err)
    28  	}
    29  
    30  	runCmd := exec.Command(dockerBinary, "run", "-dt", "-p", "8080:8080", "busybox", "nc", "-lp", "8080")
    31  	out, _, err := runCommandWithOutput(runCmd)
    32  	if err != nil {
    33  		t.Fatal(out, err)
    34  	}
    35  
    36  	cleanedContainerID := stripTrailingCharacters(out)
    37  
    38  	runCmd = exec.Command(dockerBinary, "run", "busybox", "sh", "-c", fmt.Sprintf("echo hello world | nc -w 30 %s 8080", ifaceIP))
    39  	out, _, err = runCommandWithOutput(runCmd)
    40  	if err != nil {
    41  		t.Fatal(out, err)
    42  	}
    43  
    44  	runCmd = exec.Command(dockerBinary, "logs", cleanedContainerID)
    45  	out, _, err = runCommandWithOutput(runCmd)
    46  	if err != nil {
    47  		t.Fatalf("failed to retrieve logs for container: %s, %v", out, err)
    48  	}
    49  
    50  	out = strings.Trim(out, "\r\n")
    51  
    52  	if expected := "hello world"; out != expected {
    53  		t.Fatalf("Unexpected output. Expected: %q, received: %q for iface %s", expected, out, ifaceIP)
    54  	}
    55  
    56  	killCmd := exec.Command(dockerBinary, "kill", cleanedContainerID)
    57  	if out, _, err = runCommandWithOutput(killCmd); err != nil {
    58  		t.Fatalf("failed to kill container: %s, %v", out, err)
    59  	}
    60  
    61  	logDone("network - make sure nat works through the host")
    62  }