minifaas/engine/docker/docker.go

package docker

import (
	"context"
	"io"

	"github.com/docker/docker/api/types"
	"github.com/docker/docker/api/types/container"
	"github.com/docker/docker/api/types/mount"
	"github.com/docker/docker/api/types/network"
	"github.com/docker/docker/client"
	oci "github.com/opencontainers/image-spec/specs-go/v1"
)

func newCli() (*client.Client, error) {
	return client.NewClientWithOpts(client.FromEnv)
}

func Ps(opts types.ContainerListOptions) ([]types.Container, error) {
	cli, err := newCli()
	if err != nil {
		return nil, err
	}

	return cli.ContainerList(context.Background(), opts)
}

func PsName() (ret map[string]string, err error) {
	containers, err := Ps(types.ContainerListOptions{})
	if err != nil {
		return nil, err
	}

	ret = map[string]string{}
	for _, container := range containers {
		for _, name := range container.Names {
			ret[name] = container.ID
		}
	}

	return ret, err
}

func GetContainer(containerID string) (ctr types.ContainerJSON, err error) {
	cli, err := newCli()
	if err != nil {
		return types.ContainerJSON{}, err
	}

	return cli.ContainerInspect(context.Background(), containerID)
}

func HasStarted(containerID string) bool {
	ctr, err := GetContainer(containerID)
	if err != nil {
		return false
	}

	return ctr.State.Status == "running" || ctr.State.Status == "paused" || ctr.State.Status == "restarting" || ctr.State.Status == "removing" || ctr.State.Status == "exited" || ctr.State.Status == "dead"
}

func Create(jobtype string, image string, cmd []string, mounts []mount.Mount) (string, error) {
	cli, err := newCli()
	if err != nil {
		return "", err
	}

	ctnr, err := cli.ContainerCreate(
		context.Background(),
		&container.Config{
			AttachStdout: true,
			AttachStderr: true,
			Image:        image,
			Cmd:          cmd,
		},
		&container.HostConfig{
			Mounts: mounts,
		},
		&network.NetworkingConfig{},
		&oci.Platform{
			Architecture: "amd64",
			OS:           "linux",
		},
		genContainerName(jobtype),
	)
	if err != nil {
		return "", err
	}

	return ctnr.ID, nil
}

func Start(id string) error {
	cli, err := newCli()
	if err != nil {
		return err
	}

	err = cli.ContainerStart(context.Background(), id, types.ContainerStartOptions{})
	if err != nil {
		return err
	}

	return nil
}

func Run(jobtype string, image string, cmd []string, mounts []mount.Mount) (string, error) {
	ctrid, err := Create(jobtype, image, cmd, mounts)
	if err != nil {
		return ctrid, err
	}

	return ctrid, Start(ctrid)
}

func Logs(id string) (io.ReadCloser, error) {
	cli, err := newCli()
	if err != nil {
		return nil, err
	}

	return cli.ContainerLogs(context.Background(), id, types.ContainerLogsOptions{
		ShowStdout: true,
		ShowStderr: true,
		Follow:     true,
	})
}