feat(jobs): add the job execution API

* feat(jobs): add job service interface

* feat(jobs): create job execution api

* style(jobs): remove comment

* feat(jobs): add bindings

* feat(jobs): validate payload different cases

* refactor(jobs): rename endpointJob method

* refactor(jobs): return original error

* feat(jobs): pull image before creating container

* feat(jobs): run jobs with sh

* style(jobs): remove comment

* refactor(jobs): change error names

* feat(jobs): sync pull image

* fix(jobs): close image reader after error check

* style(jobs): remove comment and add docs

* refactor(jobs): inline script command

* fix(jobs): handle pul image error

* refactor(jobs): handle image pull output

* fix(docker): set http client timeout to 100s

* fix(client): remove timeout from http client

api/docker/client.go

@@ -3,7 +3,6 @@ package docker
 import (
 	"net/http"
 	"strings"
-	"time"
 
 	"github.com/docker/docker/client"
 	"github.com/portainer/portainer"
@@ -97,7 +96,6 @@ func httpClient(endpoint *portainer.Endpoint) (*http.Client, error) {
 	}
 
 	return &http.Client{
-		Timeout:   time.Second * 10,
 		Transport: transport,
 	}, nil
 }

api/docker/jobservice.go

@@ -0,0 +1,103 @@
+package docker
+
+import (
+	"bytes"
+	"context"
+	"io"
+	"io/ioutil"
+	"strconv"
+
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/api/types/network"
+	"github.com/docker/docker/api/types/strslice"
+	"github.com/docker/docker/client"
+	"github.com/portainer/portainer"
+	"github.com/portainer/portainer/archive"
+)
+
+// JobService represnts a service that handles jobs on the host
+type JobService struct {
+	DockerClientFactory *ClientFactory
+}
+
+// NewJobService returns a pointer to a new job service
+func NewJobService(dockerClientFactory *ClientFactory) *JobService {
+	return &JobService{
+		DockerClientFactory: dockerClientFactory,
+	}
+}
+
+// Execute will execute a script on the endpoint host with the supplied image as a container
+func (service *JobService) Execute(endpoint *portainer.Endpoint, image string, script []byte) error {
+	buffer, err := archive.TarFileInBuffer(script, "script.sh", 0700)
+	if err != nil {
+		return err
+	}
+
+	cli, err := service.DockerClientFactory.CreateClient(endpoint)
+	if err != nil {
+		return err
+	}
+	defer cli.Close()
+
+	err = pullImage(cli, image)
+	if err != nil {
+		return err
+	}
+
+	containerConfig := &container.Config{
+		AttachStdin:  true,
+		AttachStdout: true,
+		AttachStderr: true,
+		Tty:          true,
+		WorkingDir:   "/tmp",
+		Image:        image,
+		Labels: map[string]string{
+			"io.portainer.job.endpoint": strconv.Itoa(int(endpoint.ID)),
+		},
+		Cmd: strslice.StrSlice([]string{"sh", "/tmp/script.sh"}),
+	}
+
+	hostConfig := &container.HostConfig{
+		Binds:       []string{"/:/host", "/etc:/etc:ro", "/usr:/usr:ro", "/run:/run:ro", "/sbin:/sbin:ro", "/var:/var:ro"},
+		NetworkMode: "host",
+		Privileged:  true,
+	}
+
+	networkConfig := &network.NetworkingConfig{}
+
+	body, err := cli.ContainerCreate(context.Background(), containerConfig, hostConfig, networkConfig, "")
+	if err != nil {
+		return err
+	}
+
+	copyOptions := types.CopyToContainerOptions{}
+	err = cli.CopyToContainer(context.Background(), body.ID, "/tmp", bytes.NewReader(buffer), copyOptions)
+	if err != nil {
+		return err
+	}
+
+	startOptions := types.ContainerStartOptions{}
+	err = cli.ContainerStart(context.Background(), body.ID, startOptions)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func pullImage(cli *client.Client, image string) error {
+	imageReadCloser, err := cli.ImagePull(context.Background(), image, types.ImagePullOptions{})
+	if err != nil {
+		return err
+	}
+
+	defer imageReadCloser.Close()
+	_, err = io.Copy(ioutil.Discard, imageReadCloser)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}