add in docker service runner for corrosion

internal/machine/corroservice/docker.go

@@ -0,0 +1,91 @@
+package corroservice
+
+import (
+	"context"
+	"fmt"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/api/types/network"
+	"github.com/docker/docker/client"
+	"path/filepath"
+)
+
+const (
+	LatestImage = "corrosion:latest"
+)
+
+type DockerService struct {
+	Client  *client.Client
+	Image   string
+	Name    string
+	DataDir string
+	// TODO: uid/guid
+}
+
+func NewDockerService(cli *client.Client, image, name, dataDir string) *DockerService {
+	return &DockerService{
+		Client:  cli,
+		Image:   image,
+		Name:    name,
+		DataDir: dataDir,
+	}
+}
+
+func (s *DockerService) Start(ctx context.Context) error {
+	_, err := s.Client.ContainerInspect(ctx, s.Name)
+	if err != nil {
+		if client.IsErrNotFound(err) {
+			return s.startNewContainer(ctx)
+		}
+		return fmt.Errorf("inspect container %q: %w", s.Name, err)
+	}
+	// Container already exists, recreate it if its configuration has to be changed.
+	// TODO: check config equal to the new one
+	if err = s.Client.ContainerRemove(ctx, s.Name, container.RemoveOptions{Force: true}); err != nil {
+		return fmt.Errorf("remove container %q: %w", s.Name, err)
+	}
+
+	return s.startNewContainer(ctx)
+}
+
+func (s *DockerService) Restart(ctx context.Context) error {
+	if err := s.Client.ContainerRestart(ctx, s.Name, container.StopOptions{}); err != nil {
+		return fmt.Errorf("restart container %q: %w", s.Name, err)
+	}
+	return nil
+}
+
+func (s *DockerService) Running() bool {
+	c, err := s.Client.ContainerInspect(context.Background(), s.Name)
+	if err != nil {
+		return false
+	}
+
+	return c.State.Running
+}
+
+func (s *DockerService) containerConfig() *container.Config {
+	return &container.Config{
+		Image: s.Image,
+		Env: []string{
+			fmt.Sprintf("CONFIG_PATH=%s", filepath.Join(s.DataDir, "config.toml")),
+		},
+	}
+}
+
+func (s *DockerService) hostConfig() *container.HostConfig {
+	return &container.HostConfig{
+		NetworkMode: network.NetworkHost,
+	}
+}
+
+func (s *DockerService) startNewContainer(ctx context.Context) error {
+	_, err := s.Client.ContainerCreate(ctx, s.containerConfig(), s.hostConfig(), nil, nil, s.Name)
+	if err != nil {
+		return fmt.Errorf("create container: %w", err)
+	}
+	if err = s.Client.ContainerStart(ctx, s.Name, container.StartOptions{}); err != nil {
+		return fmt.Errorf("start container: %w", err)
+	}
+
+	return nil
+}