/
docker.go
184 lines (156 loc) · 4.96 KB
/
docker.go
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package common
import (
"bufio"
"context"
"encoding/json"
"fmt"
"github.com/docker/docker/api/types"
"github.com/docker/docker/builder/dockerignore"
"github.com/docker/docker/client"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/fileutils"
"io"
"os"
"path/filepath"
)
// DockerImageBuilder for creating docker images
type DockerImageBuilder interface {
ImageBuild(contextDir string, serviceName string, relDockerfile string, tags []string, dockerOut io.Writer) error
}
// DockerImagePusher for pushing docker images
type DockerImagePusher interface {
ImagePush(image string, registryAuth string, dockerOut io.Writer) error
}
// DockerManager composite of all cluster capabilities
type DockerManager interface {
DockerImageBuilder
DockerImagePusher
}
type clientDockerManager struct {
dockerClient *client.Client
}
func newClientDockerManager() (DockerManager, error) {
log.Debug("Connecting to Docker daemon")
cli, err := client.NewEnvClient()
if err != nil {
return nil, err
}
return &clientDockerManager{
dockerClient: cli,
}, nil
}
func (d *clientDockerManager) ImageBuild(contextDir string, serviceName string, relDockerfile string, tags []string, dockerOut io.Writer) error {
options := types.ImageBuildOptions{
Tags: tags,
Labels: map[string]string{"SERVICE_NAME": serviceName},
}
buildContext, err := createBuildContext(contextDir, relDockerfile)
if err != nil {
return err
}
defer buildContext.Close()
log.Debugf("Creating image from context dir '%s' with tag '%s'", contextDir, tags)
resp, err := d.dockerClient.ImageBuild(context.Background(), buildContext, options)
if err != nil {
return err
}
return handleDockerResponse(resp.Body, dockerOut)
}
func createBuildContext(contextDir string, relDockerfile string) (io.ReadCloser, error) {
log.Debugf("Creating archive for build context dir '%s' with relative dockerfile '%s'", contextDir, relDockerfile)
// And canonicalize dockerfile name to a platform-independent one
relDockerfile, err := archive.CanonicalTarNameForPath(relDockerfile)
if err != nil {
return nil, fmt.Errorf("cannot canonicalize dockerfile path %s: %v", relDockerfile, err)
}
f, err := os.Open(filepath.Join(contextDir, ".dockerignore"))
if err != nil && !os.IsNotExist(err) {
return nil, err
}
defer f.Close()
var excludes []string
if err == nil {
excludes, err = dockerignore.ReadAll(f)
if err != nil {
return nil, err
}
}
// If .dockerignore mentions .dockerignore or the Dockerfile
// then make sure we send both files over to the daemon
// because Dockerfile is, obviously, needed no matter what, and
// .dockerignore is needed to know if either one needs to be
// removed. The daemon will remove them for us, if needed, after it
// parses the Dockerfile. Ignore errors here, as they will have been
// caught by validateContextDirectory above.
var includes = []string{"."}
keepThem1, _ := fileutils.Matches(".dockerignore", excludes)
keepThem2, _ := fileutils.Matches(relDockerfile, excludes)
if keepThem1 || keepThem2 {
includes = append(includes, ".dockerignore", relDockerfile)
}
compression := archive.Uncompressed
buildCtx, err := archive.TarWithOptions(contextDir, &archive.TarOptions{
Compression: compression,
ExcludePatterns: excludes,
IncludeFiles: includes,
})
if err != nil {
return nil, err
}
return buildCtx, nil
}
func (d *clientDockerManager) ImagePush(image string, registryAuth string, dockerOut io.Writer) error {
log.Debugf("Pushing image '%s' auth '%s'", image, registryAuth)
pushOptions := types.ImagePushOptions{
RegistryAuth: registryAuth,
}
resp, err := d.dockerClient.ImagePush(context.Background(), image, pushOptions)
if err != nil {
return err
}
return handleDockerResponse(resp, dockerOut)
}
type dockerMessage struct {
ID string `json:"id"`
Stream string `json:"stream"`
Error string `json:"error"`
ErrorDetail struct {
Message string
}
Status string `json:"status"`
Progress string `json:"progress"`
}
func handleDockerResponse(resp io.ReadCloser, dockerOut io.Writer) error {
defer resp.Close()
scanner := bufio.NewScanner(resp)
msg := dockerMessage{}
for scanner.Scan() {
line := scanner.Bytes()
msg.ID = ""
msg.Stream = ""
msg.Error = ""
msg.ErrorDetail.Message = ""
msg.Status = ""
msg.Progress = ""
if err := json.Unmarshal(line, &msg); err == nil {
if msg.Error != "" {
return fmt.Errorf("%s", msg.Error)
} else if dockerOut != nil {
if msg.Status != "" {
if msg.Progress != "" {
dockerOut.Write([]byte(fmt.Sprintf(" %s :: %s :: %s\n", msg.Status, msg.ID, msg.Progress)))
} else {
dockerOut.Write([]byte(fmt.Sprintf(" %s :: %s\n", msg.Status, msg.ID)))
}
} else if msg.Stream != "" {
dockerOut.Write([]byte(fmt.Sprintf(" %s", msg.Stream)))
} else {
log.Debugf("Unable to handle line: %s", string(line))
}
}
} else {
log.Debugf("Unable to unmarshal line [%s] ==> %v", string(line), err)
}
}
return nil
}