micro/runtime/package/docker/docker.go

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// Package docker builds docker images
package docker
import (
"archive/tar"
"bytes"
"io/ioutil"
"os"
"path/filepath"
"github.com/fsouza/go-dockerclient"
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"github.com/micro/go-micro/runtime/package"
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"github.com/micro/go-micro/util/log"
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)
type Packager struct {
Options packager.Options
Client *docker.Client
}
func (d *Packager) Compile(s *packager.Source) (*packager.Binary, error) {
image := filepath.Join(s.Repository.Path, s.Repository.Name)
buf := new(bytes.Buffer)
tw := tar.NewWriter(buf)
defer tw.Close()
dockerFile := "Dockerfile"
// open docker file
f, err := os.Open(filepath.Join(s.Repository.Path, s.Repository.Name, dockerFile))
if err != nil {
return nil, err
}
// read docker file
by, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
tarHeader := &tar.Header{
Name: dockerFile,
Size: int64(len(by)),
}
err = tw.WriteHeader(tarHeader)
if err != nil {
return nil, err
}
_, err = tw.Write(by)
if err != nil {
return nil, err
}
tr := bytes.NewReader(buf.Bytes())
err = d.Client.BuildImage(docker.BuildImageOptions{
Name: image,
Dockerfile: dockerFile,
InputStream: tr,
OutputStream: ioutil.Discard,
RmTmpContainer: true,
SuppressOutput: true,
})
if err != nil {
return nil, err
}
return &packager.Binary{
Name: image,
Path: image,
Type: "docker",
Source: s,
}, nil
}
func (d *Packager) Delete(b *packager.Binary) error {
image := filepath.Join(b.Path, b.Name)
return d.Client.RemoveImage(image)
}
func NewPackager(opts ...packager.Option) packager.Packager {
options := packager.Options{}
for _, o := range opts {
o(&options)
}
endpoint := "unix:///var/run/docker.sock"
client, err := docker.NewClient(endpoint)
if err != nil {
log.Fatal(err)
}
return &Packager{
Options: options,
Client: client,
}
}