// BuildAndPushImageOfSizeWithDocker tries to build an image of wanted size and number of layers. It instructs
// Docker daemon directly. Built image is stored as an image stream tag <name>:<tag>. If shouldSucceed is
// false, a push is expected to fail with a denied error. Note the size is only approximate. Resulting image
// size will be different depending on used compression algorithm and metadata overhead.
func BuildAndPushImageOfSizeWithDocker(
oc *exutil.CLI,
dClient *dockerclient.Client,
name, tag string,
size uint64,
numberOfLayers int,
outSink io.Writer,
shouldSucceed bool,
) (imageDigest string, err error) {
registryURL, err := GetDockerRegistryURL(oc)
if err != nil {
return "", err
}
tempDir, err := ioutil.TempDir("", "name-build")
if err != nil {
return "", err
}
dataSize := calculateRoughDataSize(oc.Stdout(), size, numberOfLayers)
lines := make([]string, numberOfLayers+1)
lines[0] = "FROM scratch"
for i := 1; i <= numberOfLayers; i++ {
blobName := fmt.Sprintf("data%d", i)
if err := createRandomBlob(path.Join(tempDir, blobName), dataSize); err != nil {
return "", err
}
lines[i] = fmt.Sprintf("COPY %s /%s", blobName, blobName)
}
if err := ioutil.WriteFile(path.Join(tempDir, "Dockerfile"), []byte(strings.Join(lines, "\n")+"\n"), 0644); err != nil {
return "", err
}
imageName := fmt.Sprintf("%s/%s/%s", registryURL, oc.Namespace(), name)
taggedName := fmt.Sprintf("%s:%s", imageName, tag)
err = dClient.BuildImage(dockerclient.BuildImageOptions{
Name: taggedName,
RmTmpContainer: true,
ForceRmTmpContainer: true,
ContextDir: tempDir,
OutputStream: outSink,
})
if err != nil {
return "", fmt.Errorf("failed to build %q image: %v", taggedName, err)
}
image, err := dClient.InspectImage(taggedName)
if err != nil {
return "", err
}
defer dClient.RemoveImageExtended(image.ID, dockerclient.RemoveImageOptions{Force: true})
digest := ""
if len(image.RepoDigests) == 1 {
digest = image.RepoDigests[0]
}
out, err := oc.Run("whoami").Args("-t").Output()
if err != nil {
return "", err
}
token := strings.TrimSpace(out)
var buf bytes.Buffer
err = dClient.PushImage(dockerclient.PushImageOptions{
Name: imageName,
Tag: tag,
Registry: registryURL,
OutputStream: &buf,
}, dockerclient.AuthConfiguration{
Username: "******",
Password: token,
Email: "*****@*****.**",
ServerAddress: registryURL,
})
out = buf.String()
outSink.Write([]byte(out))
if shouldSucceed {
if err != nil {
return "", fmt.Errorf("Got unexpected push error: %v", err)
}
if len(digest) == 0 {
outSink.Write([]byte("matching digest string\n"))
match := rePushedImageDigest.FindStringSubmatch(out)
if len(match) < 2 {
return "", fmt.Errorf("Failed to parse digest")
}
digest = match[1]
}
return digest, nil
}
if err == nil {
return "", fmt.Errorf("Push unexpectedly succeeded")
}
if !reExpectedDeniedError.MatchString(err.Error()) {
return "", fmt.Errorf("Failed to match expected %q in: %q", reExpectedDeniedError.String(), err.Error())
}
return "", nil
}
