github.com/zhouyu0/docker-note@v0.0.0-20190722021225-b8d3825084db/integration/build/build_squash_test.go (about)

     1  package build
     2  
     3  import (
     4  	"bytes"
     5  	"context"
     6  	"io"
     7  	"io/ioutil"
     8  	"strings"
     9  	"testing"
    10  
    11  	"github.com/docker/docker/api/types"
    12  	"github.com/docker/docker/integration/internal/container"
    13  	"github.com/docker/docker/internal/test/daemon"
    14  	"github.com/docker/docker/internal/test/fakecontext"
    15  	"github.com/docker/docker/pkg/stdcopy"
    16  	"gotest.tools/assert"
    17  	is "gotest.tools/assert/cmp"
    18  	"gotest.tools/skip"
    19  )
    20  
    21  func TestBuildSquashParent(t *testing.T) {
    22  	skip.If(t, testEnv.DaemonInfo.OSType == "windows")
    23  	skip.If(t, !testEnv.DaemonInfo.ExperimentalBuild)
    24  	skip.If(t, testEnv.IsRemoteDaemon, "cannot run daemon when remote daemon")
    25  	d := daemon.New(t, daemon.WithExperimental)
    26  	d.StartWithBusybox(t)
    27  	defer d.Stop(t)
    28  
    29  	client := d.NewClientT(t)
    30  
    31  	dockerfile := `
    32  		FROM busybox
    33  		RUN echo hello > /hello
    34  		RUN echo world >> /hello
    35  		RUN echo hello > /remove_me
    36  		ENV HELLO world
    37  		RUN rm /remove_me
    38  		`
    39  
    40  	// build and get the ID that we can use later for history comparison
    41  	ctx := context.Background()
    42  	source := fakecontext.New(t, "", fakecontext.WithDockerfile(dockerfile))
    43  	defer source.Close()
    44  
    45  	name := "test"
    46  	resp, err := client.ImageBuild(ctx,
    47  		source.AsTarReader(t),
    48  		types.ImageBuildOptions{
    49  			Remove:      true,
    50  			ForceRemove: true,
    51  			Tags:        []string{name},
    52  		})
    53  	assert.NilError(t, err)
    54  	_, err = io.Copy(ioutil.Discard, resp.Body)
    55  	resp.Body.Close()
    56  	assert.NilError(t, err)
    57  
    58  	inspect, _, err := client.ImageInspectWithRaw(ctx, name)
    59  	assert.NilError(t, err)
    60  	origID := inspect.ID
    61  
    62  	// build with squash
    63  	resp, err = client.ImageBuild(ctx,
    64  		source.AsTarReader(t),
    65  		types.ImageBuildOptions{
    66  			Remove:      true,
    67  			ForceRemove: true,
    68  			Squash:      true,
    69  			Tags:        []string{name},
    70  		})
    71  	assert.NilError(t, err)
    72  	_, err = io.Copy(ioutil.Discard, resp.Body)
    73  	resp.Body.Close()
    74  	assert.NilError(t, err)
    75  
    76  	cid := container.Run(t, ctx, client,
    77  		container.WithImage(name),
    78  		container.WithCmd("/bin/sh", "-c", "cat /hello"),
    79  	)
    80  	reader, err := client.ContainerLogs(ctx, cid, types.ContainerLogsOptions{
    81  		ShowStdout: true,
    82  	})
    83  	assert.NilError(t, err)
    84  
    85  	actualStdout := new(bytes.Buffer)
    86  	actualStderr := ioutil.Discard
    87  	_, err = stdcopy.StdCopy(actualStdout, actualStderr, reader)
    88  	assert.NilError(t, err)
    89  	assert.Check(t, is.Equal(strings.TrimSpace(actualStdout.String()), "hello\nworld"))
    90  
    91  	container.Run(t, ctx, client,
    92  		container.WithImage(name),
    93  		container.WithCmd("/bin/sh", "-c", "[ ! -f /remove_me ]"),
    94  	)
    95  	container.Run(t, ctx, client,
    96  		container.WithImage(name),
    97  		container.WithCmd("/bin/sh", "-c", `[ "$(echo $HELLO)" == "world" ]`),
    98  	)
    99  
   100  	origHistory, err := client.ImageHistory(ctx, origID)
   101  	assert.NilError(t, err)
   102  	testHistory, err := client.ImageHistory(ctx, name)
   103  	assert.NilError(t, err)
   104  
   105  	inspect, _, err = client.ImageInspectWithRaw(ctx, name)
   106  	assert.NilError(t, err)
   107  	assert.Check(t, is.Len(testHistory, len(origHistory)+1))
   108  	assert.Check(t, is.Len(inspect.RootFS.Layers, 2))
   109  }