package network // import "github.com/docker/docker/integration/network" import ( "context" "testing" "time" "github.com/docker/docker/api/types" "github.com/docker/docker/integration/internal/container" "github.com/docker/docker/integration/internal/network" "github.com/docker/docker/testutil/daemon" "gotest.tools/v3/poll" "gotest.tools/v3/skip" ) func TestDaemonDNSFallback(t *testing.T) { skip.If(t, testEnv.IsRemoteDaemon, "cannot start daemon on remote test run") skip.If(t, testEnv.DaemonInfo.OSType != "linux") skip.If(t, IsUserNamespace()) d := daemon.New(t) d.StartWithBusybox(t, "-b", "none", "--dns", "127.127.127.1", "--dns", "8.8.8.8") defer d.Stop(t) c := d.NewClientT(t) ctx := context.Background() network.CreateNoError(ctx, t, c, "test") defer c.NetworkRemove(ctx, "test") cid := container.Run(ctx, t, c, container.WithNetworkMode("test"), container.WithCmd("nslookup", "docker.com")) defer c.ContainerRemove(ctx, cid, types.ContainerRemoveOptions{Force: true}) poll.WaitOn(t, container.IsSuccessful(ctx, c, cid), poll.WithDelay(100*time.Millisecond), poll.WithTimeout(10*time.Second)) }