github.com/ncdc/docker@v0.10.1-0.20160129113957-6c6729ef5b74/integration-cli/docker_cli_nat_test.go (about)

     1  package main
     2  
     3  import (
     4  	"fmt"
     5  	"io/ioutil"
     6  	"net"
     7  	"strings"
     8  
     9  	"github.com/docker/docker/pkg/integration/checker"
    10  	"github.com/go-check/check"
    11  )
    12  
    13  func startServerContainer(c *check.C, msg string, port int) string {
    14  	name := "server"
    15  	cmd := []string{
    16  		"-d",
    17  		"-p", fmt.Sprintf("%d:%d", port, port),
    18  		"busybox",
    19  		"sh", "-c", fmt.Sprintf("echo %q | nc -lp %d", msg, port),
    20  	}
    21  	c.Assert(waitForContainer(name, cmd...), check.IsNil)
    22  	return name
    23  }
    24  
    25  func getExternalAddress(c *check.C) net.IP {
    26  	iface, err := net.InterfaceByName("eth0")
    27  	if err != nil {
    28  		c.Skip(fmt.Sprintf("Test not running with `make test`. Interface eth0 not found: %v", err))
    29  	}
    30  
    31  	ifaceAddrs, err := iface.Addrs()
    32  	c.Assert(err, check.IsNil)
    33  	c.Assert(ifaceAddrs, checker.Not(checker.HasLen), 0)
    34  
    35  	ifaceIP, _, err := net.ParseCIDR(ifaceAddrs[0].String())
    36  	c.Assert(err, check.IsNil)
    37  
    38  	return ifaceIP
    39  }
    40  
    41  func getContainerLogs(c *check.C, containerID string) string {
    42  	out, _ := dockerCmd(c, "logs", containerID)
    43  	return strings.Trim(out, "\r\n")
    44  }
    45  
    46  func getContainerStatus(c *check.C, containerID string) string {
    47  	out, err := inspectField(containerID, "State.Running")
    48  	c.Assert(err, check.IsNil)
    49  	return out
    50  }
    51  
    52  func (s *DockerSuite) TestNetworkNat(c *check.C) {
    53  	testRequires(c, DaemonIsLinux, SameHostDaemon)
    54  	msg := "it works"
    55  	startServerContainer(c, msg, 8080)
    56  	endpoint := getExternalAddress(c)
    57  	conn, err := net.Dial("tcp", fmt.Sprintf("%s:%d", endpoint.String(), 8080))
    58  	c.Assert(err, check.IsNil)
    59  
    60  	data, err := ioutil.ReadAll(conn)
    61  	conn.Close()
    62  	c.Assert(err, check.IsNil)
    63  
    64  	final := strings.TrimRight(string(data), "\n")
    65  	c.Assert(final, checker.Equals, msg)
    66  }
    67  
    68  func (s *DockerSuite) TestNetworkLocalhostTCPNat(c *check.C) {
    69  	testRequires(c, DaemonIsLinux, SameHostDaemon)
    70  	var (
    71  		msg = "hi yall"
    72  	)
    73  	startServerContainer(c, msg, 8081)
    74  	conn, err := net.Dial("tcp", "localhost:8081")
    75  	c.Assert(err, check.IsNil)
    76  
    77  	data, err := ioutil.ReadAll(conn)
    78  	conn.Close()
    79  	c.Assert(err, check.IsNil)
    80  
    81  	final := strings.TrimRight(string(data), "\n")
    82  	c.Assert(final, checker.Equals, msg)
    83  }
    84  
    85  func (s *DockerSuite) TestNetworkLoopbackNat(c *check.C) {
    86  	testRequires(c, DaemonIsLinux, SameHostDaemon, NotUserNamespace)
    87  	msg := "it works"
    88  	startServerContainer(c, msg, 8080)
    89  	endpoint := getExternalAddress(c)
    90  	out, _ := dockerCmd(c, "run", "-t", "--net=container:server", "busybox",
    91  		"sh", "-c", fmt.Sprintf("stty raw && nc -w 5 %s 8080", endpoint.String()))
    92  	final := strings.TrimRight(string(out), "\n")
    93  	c.Assert(final, checker.Equals, msg)
    94  }