// Images returns a list of all the named images in the local repository
func Images() ([]*Image, error) {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return nil, err
}
imgs, err := dc.ListImages(false)
if err != nil {
return nil, err
}
re := regexp.MustCompile("<none>:<none>")
resp := []*Image{}
for _, img := range imgs {
for _, repotag := range img.RepoTags {
if len(re.FindString(repotag)) > 0 {
continue
}
iid, err := commons.ParseImageID(repotag)
if err != nil {
return resp, err
}
resp = append(resp, &Image{img.ID, *iid})
}
}
return resp, nil
}
// Stop stops the container specified by the id. If the container can't be stopped before the timeout
// expires an error is returned.
func (c *Container) Stop(timeout time.Duration) error {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return err
}
return dc.StopContainer(c.ID, uint(timeout.Seconds()))
}
// Inspect returns information about the container specified by id.
func (c *Container) Inspect() (*dockerclient.Container, error) {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return nil, err
}
return dc.InspectContainer(c.ID)
}
// Delete remove the image from the local repository
func (img *Image) Delete() error {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return err
}
return dc.RemoveImage(img.ID.String())
}
// Export writes the contents of the container's filesystem as a tar archive to outfile.
func (c *Container) Export(outfile *os.File) error {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return err
}
return dc.ExportContainer(dockerclient.ExportContainerOptions{c.ID, outfile})
}
// Kill sends a SIGKILL signal to the container. If the container is not started
// no action is taken.
func (c *Container) Kill() error {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return err
}
return dc.KillContainer(dockerclient.KillContainerOptions{ID: c.ID, Signal: dockerclient.SIGKILL})
}
// Delete removes the container.
func (c *Container) Delete(volumes bool) error {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return err
}
return dc.RemoveContainer(dockerclient.RemoveContainerOptions{ID: c.ID, RemoveVolumes: volumes})
}
// Commit creates a new Image from the containers changes.
func (c *Container) Commit(iidstr string) (*Image, error) {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return nil, err
}
iid, err := commons.ParseImageID(iidstr)
if err != nil {
return nil, err
}
img, err := dc.CommitContainer(
dockerclient.CommitContainerOptions{
Container: c.ID,
Repository: iid.BaseName(),
})
if err != nil {
glog.V(1).Infof("unable to commit container %s: %v", c.ID, err)
return nil, err
}
if useRegistry {
err = pushImage(iid.BaseName(), iid.Registry(), iid.Tag)
}
return &Image{img.ID, *iid}, err
}
func InspectImage(uuid string) (*dockerclient.Image, error) {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return nil, err
}
return dc.InspectImage(uuid)
}
// ImportImage creates a new image in the local repository from a file system archive.
func ImportImage(repotag, filename string) error {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return err
}
glog.V(1).Infof("importing image %s from %s", repotag, filename)
f, err := os.Open(filename)
if err != nil {
return err
}
defer f.Close()
iid, err := commons.ParseImageID(repotag)
if err != nil {
return err
}
opts := dockerclient.ImportImageOptions{
Repository: iid.BaseName(),
Source: "-",
InputStream: f,
Tag: iid.Tag,
}
if err = dc.ImportImage(opts); err != nil {
glog.V(1).Infof("unable to import %s: %v", repotag, err)
return err
}
return err
}
// Opens a connection to docker if not already connected
func (a *api) connectDocker() (*dockerclient.Client, error) {
if a.docker == nil {
const DockerEndpoint string = "unix:///var/run/docker.sock"
var err error
if a.docker, err = dockerclient.NewClient(DockerEndpoint); err != nil {
return nil, fmt.Errorf("could not create a client to docker: %s", err)
}
}
return a.docker, nil
}
// FindContainer looks up a container using its id or name.
func FindContainer(id string) (*Container, error) {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return nil, err
}
ctr, err := dc.InspectContainer(id)
if err != nil {
if _, ok := err.(*dockerclient.NoSuchContainer); ok {
return nil, ErrNoSuchContainer
}
return nil, err
}
return &Container{ctr, dockerclient.HostConfig{}}, nil
}
// init starts up the kernel loop that is responsible for handling all the API calls
// in a goroutine.
func init() {
trues := []string{"1", "true", "t", "yes"}
if v := strings.ToLower(os.Getenv(sdr)); v != "" {
for _, t := range trues {
if v == t {
useRegistry = true
}
}
}
client, err := dockerclient.NewClient(dockerep)
if err != nil {
panic(fmt.Sprintf("can't create Docker client: %v", err))
}
go kernel(client, done)
}
// Containers retrieves a list of all the Docker containers.
func Containers() ([]*Container, error) {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return nil, err
}
apictrs, err := dc.ListContainers(dockerclient.ListContainersOptions{All: true})
if err != nil {
return nil, err
}
resp := []*Container{}
for _, apictr := range apictrs {
ctr, err := dc.InspectContainer(apictr.ID)
if err != nil {
continue
}
resp = append(resp, &Container{ctr, dockerclient.HostConfig{}})
}
return resp, nil
}
// Start uses the information provided in the container definition cd to start a new Docker
// container. If a container can't be started before the timeout expires an error is returned.
func (c *Container) Start(timeout time.Duration) error {
if c.State.Running != false {
return nil
}
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return err
}
args := struct {
id string
hostConfig *dockerclient.HostConfig
}{c.ID, &c.HostConfig}
// check to see if the container is already running
ctr, err := dc.InspectContainer(args.id)
if err != nil {
glog.V(1).Infof("unable to inspect container %s prior to starting it: %v", args.id, err)
return err
}
if ctr.State.Running {
return ErrAlreadyStarted
}
glog.V(2).Infof("starting container %s: %+v", args.id, args.hostConfig)
err = dc.StartContainer(args.id, args.hostConfig)
if err != nil {
glog.V(2).Infof("unable to start %s: %v", args.id, err)
return err
}
glog.V(2).Infof("update container %s state post start", args.id)
ctr, err = dc.InspectContainer(args.id)
if err != nil {
glog.V(2).Infof("failed to update container %s state post start: %v", args.id, err)
return err
}
c.Container = ctr
return nil
}
func pullImage(repo, registry, tag string) error {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return err
}
glog.V(2).Info("pulling image: ", repo)
opts := dockerclient.PullImageOptions{
Repository: repo,
Registry: registry,
Tag: tag,
}
// FIXME: Need to populate AuthConfiguration (eventually)
err = dc.PullImage(opts, dockerclient.AuthConfiguration{})
if err != nil {
glog.V(2).Infof("failed to pull %s: %v", repo, err)
return err
}
return nil
}
// Tag tags an image in the local repository
func (img *Image) Tag(tag string) (*Image, error) {
iid, err := commons.ParseImageID(tag)
if err != nil {
return nil, err
}
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return nil, err
}
args := struct {
uuid string
name string
repo string
registry string
tag string
}{img.UUID, img.ID.String(), iid.BaseName(), iid.Registry(), iid.Tag}
glog.V(1).Infof("tagging image %s as: %s", args.repo, args.tag)
opts := dockerclient.TagImageOptions{Repo: args.repo, Tag: args.tag, Force: true}
err = dc.TagImage(args.name, opts)
if err != nil {
glog.V(1).Infof("unable to tag image %s: %v", args.repo, err)
return nil, err
}
if useRegistry {
pushImage(args.repo, args.registry, args.tag)
}
iid, err = commons.ParseImageID(fmt.Sprintf("%s:%s", args.repo, args.tag))
if err != nil {
return nil, err
}
return &Image{args.uuid, *iid}, nil
}
// Wait blocks until the container stops or the timeout expires and then returns its exit code.
func (c *Container) Wait(timeout time.Duration) (int, error) {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return -127, err
}
type waitResult struct {
rc int
err error
}
errc := make(chan waitResult, 1)
go func() {
rc, err := dc.WaitContainer(c.ID)
errc <- waitResult{rc, err}
}()
select {
case <-time.After(timeout):
case result := <-errc:
return result.rc, result.err
}
return -127, ErrRequestTimeout
}
func pushImage(repo, registry, tag string) error {
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return err
}
glog.V(0).Infof("pushing image from repo: %s to registry: %s with tag: %s", repo, registry, tag)
opts := dockerclient.PushImageOptions{
Name: repo,
Registry: registry,
Tag: tag,
}
// FIXME: Need to populate AuthConfiguration (eventually)
err = dc.PushImage(opts, dockerclient.AuthConfiguration{})
if err != nil {
glog.V(2).Infof("failed to push %s: %v", repo, err)
return err
}
glog.V(0).Infof("finished pushing image from repo: %s to registry: %s with tag: %s", repo, registry, tag)
return nil
}
"github.com/control-center/serviced/commons"
"github.com/control-center/serviced/commons/docker"
"github.com/control-center/serviced/dao"
"github.com/control-center/serviced/datastore"
"github.com/control-center/serviced/domain/service"
"github.com/control-center/serviced/domain/servicedefinition"
"github.com/control-center/serviced/domain/servicetemplate"
"github.com/control-center/serviced/isvcs"
)
type reloadLogstashContainer func(ctx datastore.Context, f *Facade) error
var LogstashContainerReloader reloadLogstashContainer = reloadLogstashContainerImpl
var getDockerClient = func() (*dockerclient.Client, error) { return dockerclient.NewClient("unix:///var/run/docker.sock") }
//AddServiceTemplate adds a service template to the system. Returns the id of the template added
func (f *Facade) AddServiceTemplate(ctx datastore.Context, serviceTemplate servicetemplate.ServiceTemplate) (string, error) {
hash, err := serviceTemplate.Hash()
if err != nil {
return "", err
}
serviceTemplate.ID = hash
if st, _ := f.templateStore.Get(ctx, hash); st != nil {
// This id already exists in the system
glog.Infof("Not replacing existing template %s", hash)
return hash, nil
}
// NewContainer creates a new container and returns its id. The supplied create action, if
// any, will be executed on successful creation of the container. If a start action is specified
// it will be executed after the container has been started. Note, if the start parameter is
// false the container won't be started and the start action will not be executed.
func NewContainer(cd *ContainerDefinition, start bool, timeout time.Duration, oncreate ContainerActionFunc, onstart ContainerActionFunc) (*Container, error) {
args := struct {
containerOptions *dockerclient.CreateContainerOptions
hostConfig *dockerclient.HostConfig
start bool
createaction ContainerActionFunc
startaction ContainerActionFunc
}{&cd.CreateContainerOptions, &cd.HostConfig, start, oncreate, onstart}
timeoutc := time.After(timeout)
dc, err := dockerclient.NewClient(dockerep)
if err != nil {
return nil, err
}
em, err := dc.MonitorEvents()
if err != nil {
return nil, fmt.Errorf("can't monitor Docker events: %v", err)
}
iid, err := commons.ParseImageID(args.containerOptions.Config.Image)
if err != nil {
return nil, err
}
if useRegistry {
if err := PullImage(iid.String()); err != nil {
glog.V(2).Infof("Unable to pull image %s: %v", iid.String(), err)
if _, err2 := lookupImage(iid.String()); err2 != nil {
return nil, err2
}
}
}
glog.V(2).Infof("creating container: %#v", *args.containerOptions)
ctr, err := dc.CreateContainer(*args.containerOptions)
switch {
case err == dockerclient.ErrNoSuchImage:
if err := PullImage(iid.String()); err != nil {
glog.V(2).Infof("Unable to pull image %s: %v", iid.String(), err)
return nil, err
}
ctr, err = dc.CreateContainer(*args.containerOptions)
if err != nil {
glog.V(2).Infof("container creation failed %+v: %v", *args.containerOptions, err)
return nil, err
}
case err != nil:
glog.V(2).Infof("container creation failed %+v: %v", *args.containerOptions, err)
return nil, err
}
glog.V(2).Infof("created container: %+v", *ctr)
if args.createaction != nil {
args.createaction(ctr.ID)
}
if args.start {
ss, err := em.Subscribe(ctr.ID)
if err != nil {
return nil, err
}
sc := make(chan struct{})
ss.Handle(Start, func(e dockerclient.Event) error {
if args.startaction != nil {
args.startaction(ctr.ID)
}
glog.V(2).Infof("handling event: %+v for %s", e, ctr.ID)
close(sc)
return nil
})
defer ss.Cancel()
glog.V(2).Infof("post creation start of %s: %+v", ctr.ID, args.hostConfig)
err = dc.StartContainer(ctr.ID, args.hostConfig)
if err != nil {
glog.V(1).Infof("post creation start of %s failed: %v", ctr.ID, err)
return nil, err
}
glog.V(2).Infof("======= wait for %s to start =======", ctr.ID)
attempts := 0
WaitForContainerStart:
for {
select {
case <-timeoutc:
glog.V(2).Infof("timeout starting container")
return nil, fmt.Errorf("docker timeout starting container after %s", timeout)
case <-sc:
glog.V(2).Infof("update container %s state post start", ctr.ID)
ctrID := ctr.ID
ctr, err = dc.InspectContainer(ctrID)
if err != nil {
glog.V(1).Infof("failed to update container %s state post start: %v", ctrID, err)
return nil, err
}
glog.V(2).Infof("container %s is started", ctr.ID)
break WaitForContainerStart
case <-time.After(5 * time.Second):
nctr, err := dc.InspectContainer(ctr.ID)
if err != nil {
glog.V(2).Infof("can't inspect container %s: %v", ctr.ID, err)
return nil, err
}
ctr = nctr
switch {
case !ctr.State.Running && attempts > maxStartAttempts:
glog.V(2).Infof("timed out starting container")
return nil, fmt.Errorf("timed out starting container: %s", ctr.ID)
case !ctr.State.Running:
attempts = attempts + 1
continue WaitForContainerStart
default:
glog.V(2).Infof("container %s is running", ctr.ID)
break WaitForContainerStart
}
}
}
}
return &Container{ctr, cd.HostConfig}, nil
}
