github.com/lacework-dev/go-moby@v20.10.12+incompatible/integration/container/run_linux_test.go (about)

     1  package container // import "github.com/docker/docker/integration/container"
     2  
     3  import (
     4  	"context"
     5  	"strings"
     6  	"testing"
     7  	"time"
     8  
     9  	containertypes "github.com/docker/docker/api/types/container"
    10  	"github.com/docker/docker/api/types/versions"
    11  	"github.com/docker/docker/integration/internal/container"
    12  	net "github.com/docker/docker/integration/internal/network"
    13  	"gotest.tools/v3/assert"
    14  	is "gotest.tools/v3/assert/cmp"
    15  	"gotest.tools/v3/poll"
    16  	"gotest.tools/v3/skip"
    17  )
    18  
    19  func TestNISDomainname(t *testing.T) {
    20  	// Older versions of the daemon would concatenate hostname and domainname,
    21  	// so hostname "foobar" and domainname "baz.cyphar.com" would produce
    22  	// `foobar.baz.cyphar.com` as hostname.
    23  	skip.If(t, versions.LessThan(testEnv.DaemonAPIVersion(), "1.40"), "skip test from new feature")
    24  	skip.If(t, testEnv.DaemonInfo.OSType != "linux")
    25  
    26  	// Rootless supports custom Hostname but doesn't support custom Domainname
    27  	//  OCI runtime create failed: container_linux.go:349: starting container process caused "process_linux.go:449: container init caused \
    28  	//  "write sysctl key kernel.domainname: open /proc/sys/kernel/domainname: permission denied\"": unknown.
    29  	skip.If(t, testEnv.IsRootless, "rootless mode doesn't support setting Domainname (TODO: https://github.com/moby/moby/issues/40632)")
    30  
    31  	defer setupTest(t)()
    32  	client := testEnv.APIClient()
    33  	ctx := context.Background()
    34  
    35  	const (
    36  		hostname   = "foobar"
    37  		domainname = "baz.cyphar.com"
    38  	)
    39  
    40  	cID := container.Run(ctx, t, client, func(c *container.TestContainerConfig) {
    41  		c.Config.Hostname = hostname
    42  		c.Config.Domainname = domainname
    43  	})
    44  
    45  	poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond))
    46  
    47  	inspect, err := client.ContainerInspect(ctx, cID)
    48  	assert.NilError(t, err)
    49  	assert.Check(t, is.Equal(hostname, inspect.Config.Hostname))
    50  	assert.Check(t, is.Equal(domainname, inspect.Config.Domainname))
    51  
    52  	// Check hostname.
    53  	res, err := container.Exec(ctx, client, cID,
    54  		[]string{"cat", "/proc/sys/kernel/hostname"})
    55  	assert.NilError(t, err)
    56  	assert.Assert(t, is.Len(res.Stderr(), 0))
    57  	assert.Equal(t, 0, res.ExitCode)
    58  	assert.Check(t, is.Equal(hostname, strings.TrimSpace(res.Stdout())))
    59  
    60  	// Check domainname.
    61  	res, err = container.Exec(ctx, client, cID,
    62  		[]string{"cat", "/proc/sys/kernel/domainname"})
    63  	assert.NilError(t, err)
    64  	assert.Assert(t, is.Len(res.Stderr(), 0))
    65  	assert.Equal(t, 0, res.ExitCode)
    66  	assert.Check(t, is.Equal(domainname, strings.TrimSpace(res.Stdout())))
    67  }
    68  
    69  func TestHostnameDnsResolution(t *testing.T) {
    70  	skip.If(t, testEnv.DaemonInfo.OSType != "linux")
    71  
    72  	defer setupTest(t)()
    73  	client := testEnv.APIClient()
    74  	ctx := context.Background()
    75  
    76  	const (
    77  		hostname = "foobar"
    78  	)
    79  
    80  	// using user defined network as we want to use internal DNS
    81  	netName := "foobar-net"
    82  	net.CreateNoError(context.Background(), t, client, netName, net.WithDriver("bridge"))
    83  
    84  	cID := container.Run(ctx, t, client, func(c *container.TestContainerConfig) {
    85  		c.Config.Hostname = hostname
    86  		c.HostConfig.NetworkMode = containertypes.NetworkMode(netName)
    87  	})
    88  
    89  	poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond))
    90  
    91  	inspect, err := client.ContainerInspect(ctx, cID)
    92  	assert.NilError(t, err)
    93  	assert.Check(t, is.Equal(hostname, inspect.Config.Hostname))
    94  
    95  	// Clear hosts file so ping will use DNS for hostname resolution
    96  	res, err := container.Exec(ctx, client, cID,
    97  		[]string{"sh", "-c", "echo 127.0.0.1 localhost | tee /etc/hosts && ping -c 1 foobar"})
    98  	assert.NilError(t, err)
    99  	assert.Check(t, is.Equal("", res.Stderr()))
   100  	assert.Equal(t, 0, res.ExitCode)
   101  }