350 lines
7.7 KiB
Go
350 lines
7.7 KiB
Go
package docker
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import (
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"bytes"
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"fmt"
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"io"
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"log"
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"os"
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"os/exec"
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"regexp"
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"runtime"
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"strings"
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"sync"
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"github.com/hashicorp/go-version"
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"github.com/hashicorp/packer/packer"
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"github.com/hashicorp/packer/template/interpolate"
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)
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type DockerDriver struct {
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Ui packer.Ui
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Ctx *interpolate.Context
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l sync.Mutex
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}
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func (d *DockerDriver) DeleteImage(id string) error {
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var stderr bytes.Buffer
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cmd := exec.Command("docker", "rmi", id)
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cmd.Stderr = &stderr
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log.Printf("Deleting image: %s", id)
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if err := cmd.Start(); err != nil {
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return err
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}
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if err := cmd.Wait(); err != nil {
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err = fmt.Errorf("Error deleting image: %s\nStderr: %s",
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err, stderr.String())
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return err
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}
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return nil
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}
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func (d *DockerDriver) Commit(id string, author string, changes []string, message string) (string, error) {
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var stdout bytes.Buffer
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var stderr bytes.Buffer
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args := []string{"commit"}
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if author != "" {
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args = append(args, "--author", author)
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}
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for _, change := range changes {
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args = append(args, "--change", change)
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}
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if message != "" {
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args = append(args, "--message", message)
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}
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args = append(args, id)
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log.Printf("Committing container with args: %v", args)
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cmd := exec.Command("docker", args...)
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cmd.Stdout = &stdout
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cmd.Stderr = &stderr
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if err := cmd.Start(); err != nil {
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return "", err
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}
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if err := cmd.Wait(); err != nil {
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err = fmt.Errorf("Error committing container: %s\nStderr: %s",
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err, stderr.String())
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return "", err
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}
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return strings.TrimSpace(stdout.String()), nil
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}
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func (d *DockerDriver) Export(id string, dst io.Writer) error {
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var stderr bytes.Buffer
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cmd := exec.Command("docker", "export", id)
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cmd.Stdout = dst
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cmd.Stderr = &stderr
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log.Printf("Exporting container: %s", id)
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if err := cmd.Start(); err != nil {
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return err
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}
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if err := cmd.Wait(); err != nil {
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err = fmt.Errorf("Error exporting: %s\nStderr: %s",
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err, stderr.String())
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return err
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}
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return nil
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}
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func (d *DockerDriver) Import(path string, repo string) (string, error) {
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var stdout, stderr bytes.Buffer
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cmd := exec.Command("docker", "import", "-", repo)
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cmd.Stdout = &stdout
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cmd.Stderr = &stderr
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stdin, err := cmd.StdinPipe()
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if err != nil {
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return "", err
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}
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// There should be only one artifact of the Docker builder
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file, err := os.Open(path)
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if err != nil {
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return "", err
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}
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defer file.Close()
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if err := cmd.Start(); err != nil {
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return "", err
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}
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go func() {
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defer stdin.Close()
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io.Copy(stdin, file)
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}()
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if err := cmd.Wait(); err != nil {
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return "", fmt.Errorf("Error importing container: %s\n\nStderr: %s", err, stderr.String())
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}
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return strings.TrimSpace(stdout.String()), nil
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}
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func (d *DockerDriver) IPAddress(id string) (string, error) {
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var stderr, stdout bytes.Buffer
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cmd := exec.Command(
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"docker",
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"inspect",
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"--format",
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"{{ .NetworkSettings.IPAddress }}",
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id)
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cmd.Stdout = &stdout
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cmd.Stderr = &stderr
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if err := cmd.Run(); err != nil {
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return "", fmt.Errorf("Error: %s\n\nStderr: %s", err, stderr.String())
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}
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return strings.TrimSpace(stdout.String()), nil
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}
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func (d *DockerDriver) Login(repo, user, pass string) error {
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d.l.Lock()
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args := []string{"login"}
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if user != "" {
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args = append(args, "-u", user)
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}
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if pass != "" {
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args = append(args, "-p", pass)
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}
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if repo != "" {
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args = append(args, repo)
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}
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cmd := exec.Command("docker", args...)
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err := runAndStream(cmd, d.Ui)
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if err != nil {
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d.l.Unlock()
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}
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return err
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}
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func (d *DockerDriver) Logout(repo string) error {
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args := []string{"logout"}
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if repo != "" {
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args = append(args, repo)
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}
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cmd := exec.Command("docker", args...)
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err := runAndStream(cmd, d.Ui)
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d.l.Unlock()
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return err
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}
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func (d *DockerDriver) Pull(image string) error {
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cmd := exec.Command("docker", "pull", image)
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return runAndStream(cmd, d.Ui)
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}
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func (d *DockerDriver) Push(name string) error {
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cmd := exec.Command("docker", "push", name)
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return runAndStream(cmd, d.Ui)
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}
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func (d *DockerDriver) SaveImage(id string, dst io.Writer) error {
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var stderr bytes.Buffer
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cmd := exec.Command("docker", "save", id)
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cmd.Stdout = dst
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cmd.Stderr = &stderr
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log.Printf("Exporting image: %s", id)
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if err := cmd.Start(); err != nil {
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return err
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}
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if err := cmd.Wait(); err != nil {
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err = fmt.Errorf("Error exporting: %s\nStderr: %s",
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err, stderr.String())
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return err
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}
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return nil
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}
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func (d *DockerDriver) StartContainer(config *ContainerConfig) (string, error) {
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// Build up the template data
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var tplData startContainerTemplate
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tplData.Image = config.Image
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ctx := *d.Ctx
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ctx.Data = &tplData
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// Args that we're going to pass to Docker
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args := []string{"run"}
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if config.Privileged {
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args = append(args, "--privileged")
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}
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for host, guest := range config.Volumes {
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if runtime.GOOS == "windows" {
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// docker-toolbox can't handle the normal C:\filepath format in CLI
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host = strings.Replace(host, "\\", "/", -1)
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host = strings.Replace(host, "C:/", "/c/", 1)
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}
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args = append(args, "-v", fmt.Sprintf("%s:%s", host, guest))
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}
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for _, v := range config.RunCommand {
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v, err := interpolate.Render(v, &ctx)
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if err != nil {
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return "", err
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}
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args = append(args, v)
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}
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d.Ui.Message(fmt.Sprintf(
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"Run command: docker %s", strings.Join(args, " ")))
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// Start the container
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var stdout, stderr bytes.Buffer
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cmd := exec.Command("docker", args...)
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cmd.Stdout = &stdout
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cmd.Stderr = &stderr
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log.Printf("Starting container with args: %v", args)
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if err := cmd.Start(); err != nil {
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return "", err
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}
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log.Println("Waiting for container to finish starting")
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if err := cmd.Wait(); err != nil {
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if _, ok := err.(*exec.ExitError); ok {
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err = fmt.Errorf("Docker exited with a non-zero exit status.\nStderr: %s",
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stderr.String())
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}
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return "", err
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}
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// Capture the container ID, which is alone on stdout
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return strings.TrimSpace(stdout.String()), nil
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}
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func (d *DockerDriver) StopContainer(id string) error {
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if err := exec.Command("docker", "kill", id).Run(); err != nil {
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return err
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}
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return exec.Command("docker", "rm", id).Run()
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}
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func (d *DockerDriver) TagImage(id string, repo string, force bool) error {
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args := []string{"tag"}
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// detect running docker version before tagging
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// flag `force` for docker tagging was removed after Docker 1.12.0
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// to keep its backward compatibility, we are not going to remove `force`
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// option, but to ignore it when Docker version >= 1.12.0
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//
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// for more detail, please refer to the following links:
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// - https://docs.docker.com/engine/deprecated/#/f-flag-on-docker-tag
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// - https://github.com/docker/docker/pull/23090
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version_running, err := d.Version()
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if err != nil {
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return err
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}
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version_deprecated, err := version.NewVersion(string("1.12.0"))
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if err != nil {
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// should never reach this line
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return err
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}
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if force {
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if version_running.LessThan(version_deprecated) {
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args = append(args, "-f")
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} else {
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// do nothing if Docker version >= 1.12.0
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log.Printf("[WARN] option: \"force\" will be ignored here")
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log.Printf("since it was removed after Docker 1.12.0 released")
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}
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}
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args = append(args, id, repo)
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var stderr bytes.Buffer
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cmd := exec.Command("docker", args...)
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cmd.Stderr = &stderr
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if err := cmd.Start(); err != nil {
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return err
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}
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if err := cmd.Wait(); err != nil {
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err = fmt.Errorf("Error tagging image: %s\nStderr: %s",
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err, stderr.String())
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return err
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}
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return nil
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}
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func (d *DockerDriver) Verify() error {
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if _, err := exec.LookPath("docker"); err != nil {
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return err
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}
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return nil
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}
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func (d *DockerDriver) Version() (*version.Version, error) {
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output, err := exec.Command("docker", "-v").Output()
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if err != nil {
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return nil, err
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}
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match := regexp.MustCompile(version.VersionRegexpRaw).FindSubmatch(output)
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if match == nil {
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return nil, fmt.Errorf("unknown version: %s", output)
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}
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return version.NewVersion(string(match[0]))
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}
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