Initial commit

services/docker.go

@@ -0,0 +1,89 @@
+package services
+
+import (
+	"log"
+	"strings"
+
+	ptypes "github.com/xetorthio/play-with-docker/types"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/client"
+	"golang.org/x/net/context"
+)
+
+var c *client.Client
+
+func init() {
+	var err error
+	c, err = client.NewEnvClient()
+	if err != nil {
+		// this wont happen if daemon is offline, only for some critical errors
+		log.Fatal("Cannot initialize docker client")
+	}
+
+}
+
+func GetContainerInfo(id string) (types.ContainerJSON, error) {
+	return c.ContainerInspect(context.Background(), id)
+}
+
+func CreateNetwork(name string) error {
+	opts := types.NetworkCreate{Attachable: true}
+	_, err := c.NetworkCreate(context.Background(), name, opts)
+
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func GetExecConnection(id string, ctx context.Context) (*types.HijackedResponse, error) {
+	conf := types.ExecConfig{Tty: true, AttachStdin: true, AttachStderr: true, AttachStdout: true, Cmd: []string{"sh"}}
+	resp, err := c.ContainerExecCreate(ctx, id, conf)
+	if err != nil {
+		return nil, err
+	}
+
+	//err = c.ContainerExecStart(context.Background(), resp.ID, types.ExecStartCheck{Tty: true})
+	//if err != nil {
+	//return nil, err
+	//}
+
+	conn, err := c.ContainerExecAttach(ctx, resp.ID, conf)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &conn, nil
+
+}
+
+func CreateInstance(net string) (*ptypes.Instance, error) {
+
+	h := &container.HostConfig{NetworkMode: container.NetworkMode(net), Privileged: true}
+	conf := &container.Config{Image: "docker:dind"}
+	container, err := c.ContainerCreate(context.Background(), conf, h, nil, "")
+
+	if err != nil {
+		return nil, err
+	}
+
+	err = c.ContainerStart(context.Background(), container.ID, types.ContainerStartOptions{})
+	if err != nil {
+		return nil, err
+	}
+
+	cinfo, err := GetContainerInfo(container.ID)
+	if err != nil {
+		return nil, err
+	}
+
+	return &ptypes.Instance{Name: strings.Replace(cinfo.Name, "/", "", 1), IP: cinfo.NetworkSettings.Networks[net].IPAddress}, nil
+}
+
+func DeleteContainer(id string) error {
+	return c.ContainerRemove(context.Background(), id, types.ContainerRemoveOptions{Force: true})
+}