// getImageByName tries to find the image info with the given image name.
func (r *runtime) getImageByName(imageName string) (image, error) {
// TODO(yifan): Print hash in rkt image?
images, err := r.listImages()
if err != nil {
return image{}, err
}
var name, version string
nameVersion := strings.Split(imageName, ":")
// TODO(yifan): Currently the name cannot include "_", it is replaced
// by "-". See the issue in appc/spec: https://github.com/appc/spec/issues/406.
name, err = appctypes.SanitizeACName(nameVersion[0])
if err != nil {
return image{}, err
}
if len(nameVersion) == 2 {
version = nameVersion[1]
}
for _, img := range images {
if img.name == name {
if version == "" || img.version == version {
return img, nil
}
}
}
return image{}, fmt.Errorf("cannot find the image %q", imageName)
}
func convertVolumesToMPs(dockerVolumes map[string]struct{}) ([]appctypes.MountPoint, error) {
mps := []appctypes.MountPoint{}
dup := make(map[string]int)
for p := range dockerVolumes {
n := filepath.Join("volume", p)
sn, err := appctypes.SanitizeACName(n)
if err != nil {
return nil, err
}
// check for duplicate names
if i, ok := dup[sn]; ok {
dup[sn] = i + 1
sn = fmt.Sprintf("%s-%d", sn, i)
} else {
dup[sn] = 1
}
mp := appctypes.MountPoint{
Name: *appctypes.MustACName(sn),
Path: p,
}
mps = append(mps, mp)
}
return mps, nil
}
func parseDockerPort(dockerPort string) (*appctypes.Port, error) {
var portString string
proto := "tcp"
sp := strings.Split(dockerPort, "/")
if len(sp) < 2 {
portString = dockerPort
} else {
proto = sp[1]
portString = sp[0]
}
port, err := strconv.ParseUint(portString, 10, 0)
if err != nil {
return nil, fmt.Errorf("error parsing port %q: %v", portString, err)
}
sn, err := appctypes.SanitizeACName(dockerPort)
if err != nil {
return nil, err
}
appcPort := &appctypes.Port{
Name: *appctypes.MustACName(sn),
Protocol: proto,
Port: uint(port),
}
return appcPort, nil
}
func imageNameToAppName(name types.ACIdentifier) (*types.ACName, error) {
parts := strings.Split(name.String(), "/")
last := parts[len(parts)-1]
sn, err := types.SanitizeACName(last)
if err != nil {
return nil, err
}
return types.MustACName(sn), nil
}
func (r *Runtime) newAppcRuntimeApp(pod *api.Pod, c api.Container, pullSecrets []api.Secret) (*appcschema.RuntimeApp, []kubecontainer.PortMapping, error) {
if err, _ := r.imagePuller.PullImage(pod, &c, pullSecrets); err != nil {
return nil, nil, err
}
imgManifest, err := r.getImageManifest(c.Image)
if err != nil {
return nil, nil, err
}
if imgManifest.App == nil {
imgManifest.App = new(appctypes.App)
}
imageID, err := r.getImageID(c.Image)
if err != nil {
return nil, nil, err
}
hash, err := appctypes.NewHash(imageID)
if err != nil {
return nil, nil, err
}
opts, err := r.generator.GenerateRunContainerOptions(pod, &c)
if err != nil {
return nil, nil, err
}
if err := setApp(imgManifest.App, &c, opts); err != nil {
return nil, nil, err
}
name, err := appctypes.SanitizeACName(c.Name)
if err != nil {
return nil, nil, err
}
appName := appctypes.MustACName(name)
kubehash := kubecontainer.HashContainer(&c)
return &appcschema.RuntimeApp{
Name: *appName,
Image: appcschema.RuntimeImage{ID: *hash},
App: imgManifest.App,
Annotations: []appctypes.Annotation{
{
Name: *appctypes.MustACIdentifier(k8sRktContainerHashAnno),
Value: strconv.FormatUint(kubehash, 10),
},
},
}, opts.PortMappings, nil
}
func (img *Image) RuntimeApp() schema.RuntimeApp {
nameStr, err := types.SanitizeACName(path.Base(img.Manifest.Name.String()))
if err != nil {
panic(err)
}
name := types.MustACName(nameStr)
app := schema.RuntimeApp{
Name: *name,
Image: schema.RuntimeImage{Name: &img.Manifest.Name},
}
app.Annotations.Set("jetpack/image-uuid", img.UUID.String())
if img.Hash != nil {
app.Image.ID = *img.Hash
} else {
// TODO: do we really need to store ACI tarballs to have an image ID on built images?
app.Image.ID.Set(fmt.Sprintf(
"sha512-000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%032x",
img.UUID,
))
}
return app
}
// makePodManifest transforms a kubelet pod spec to the rkt pod manifest.
// TODO(yifan): Use the RunContainerOptions generated by GenerateRunContainerOptions().
func (r *runtime) makePodManifest(pod *api.Pod) (*appcschema.PodManifest, error) {
var globalPortMappings []kubecontainer.PortMapping
manifest := appcschema.BlankPodManifest()
for _, c := range pod.Spec.Containers {
imgManifest, err := r.getImageManifest(c.Image)
if err != nil {
return nil, err
}
if imgManifest.App == nil {
return nil, fmt.Errorf("no app section in image manifest for image: %q", c.Image)
}
img, err := r.getImageByName(c.Image)
if err != nil {
return nil, err
}
hash, err := appctypes.NewHash(img.id)
if err != nil {
return nil, err
}
opts, err := r.generator.GenerateRunContainerOptions(pod, &c)
if err != nil {
return nil, err
}
globalPortMappings = append(globalPortMappings, opts.PortMappings...)
if err := setApp(imgManifest.App, &c, opts); err != nil {
return nil, err
}
manifest.Apps = append(manifest.Apps, appcschema.RuntimeApp{
// TODO(yifan): We should allow app name to be different with
// image name. See https://github.com/coreos/rkt/pull/640.
Name: imgManifest.Name,
Image: appcschema.RuntimeImage{ID: *hash},
App: imgManifest.App,
})
}
volumeMap, ok := r.volumeGetter.GetVolumes(pod.UID)
if !ok {
return nil, fmt.Errorf("cannot get the volumes for pod %q", kubecontainer.GetPodFullName(pod))
}
// Set global volumes.
for name, volume := range volumeMap {
volName, err := appctypes.NewACName(name)
if err != nil {
return nil, fmt.Errorf("cannot use the volume's name %q as ACName: %v", name, err)
}
manifest.Volumes = append(manifest.Volumes, appctypes.Volume{
Name: *volName,
Kind: "host",
Source: volume.GetPath(),
})
}
// Set global ports.
for _, port := range globalPortMappings {
name, err := appctypes.SanitizeACName(port.Name)
if err != nil {
return nil, fmt.Errorf("cannot use the port's name %q as ACName: %v", port.Name, err)
}
portName := appctypes.MustACName(name)
manifest.Ports = append(manifest.Ports, appctypes.ExposedPort{
Name: *portName,
HostPort: uint(port.HostPort),
})
}
// TODO(yifan): Set pod-level isolators once it's supported in kubernetes.
return manifest, nil
}
// setApp overrides the app's fields if any of them are specified in the
// container's spec.
func setApp(app *appctypes.App, c *api.Container, opts *kubecontainer.RunContainerOptions) error {
// Override the exec.
// TOOD(yifan): Revisit this for the overriding rule.
if len(c.Command) > 0 || len(c.Args) > 0 {
app.Exec = append(c.Command, c.Args...)
}
// TODO(yifan): Use non-root user in the future, see:
// https://github.com/coreos/rkt/issues/820
app.User, app.Group = "0", "0"
// Override the working directory.
if len(c.WorkingDir) > 0 {
app.WorkingDirectory = c.WorkingDir
}
// Override the environment.
if len(opts.Envs) > 0 {
app.Environment = []appctypes.EnvironmentVariable{}
}
for _, env := range c.Env {
app.Environment = append(app.Environment, appctypes.EnvironmentVariable{
Name: env.Name,
Value: env.Value,
})
}
// Override the mount points.
if len(opts.Mounts) > 0 {
app.MountPoints = []appctypes.MountPoint{}
}
for _, m := range opts.Mounts {
mountPointName, err := appctypes.NewACName(m.Name)
if err != nil {
return err
}
app.MountPoints = append(app.MountPoints, appctypes.MountPoint{
Name: *mountPointName,
Path: m.ContainerPath,
ReadOnly: m.ReadOnly,
})
}
// Override the ports.
if len(opts.PortMappings) > 0 {
app.Ports = []appctypes.Port{}
}
for _, p := range opts.PortMappings {
name, err := appctypes.SanitizeACName(p.Name)
if err != nil {
return err
}
portName := appctypes.MustACName(name)
app.Ports = append(app.Ports, appctypes.Port{
Name: *portName,
Protocol: string(p.Protocol),
Port: uint(p.ContainerPort),
})
}
// Override isolators.
return setIsolators(app, c)
}
// makePodManifest transforms a kubelet pod spec to the rkt pod manifest.
func (r *runtime) makePodManifest(pod *api.Pod, pullSecrets []api.Secret) (*appcschema.PodManifest, error) {
var globalPortMappings []kubecontainer.PortMapping
manifest := appcschema.BlankPodManifest()
for _, c := range pod.Spec.Containers {
if err := r.imagePuller.PullImage(pod, &c, pullSecrets); err != nil {
return nil, err
}
imgManifest, err := r.getImageManifest(c.Image)
if err != nil {
return nil, err
}
if imgManifest.App == nil {
imgManifest.App = new(appctypes.App)
}
img, err := r.getImageByName(c.Image)
if err != nil {
return nil, err
}
hash, err := appctypes.NewHash(img.ID)
if err != nil {
return nil, err
}
opts, err := r.generator.GenerateRunContainerOptions(pod, &c)
if err != nil {
return nil, err
}
globalPortMappings = append(globalPortMappings, opts.PortMappings...)
if err := setApp(imgManifest.App, &c, opts); err != nil {
return nil, err
}
name, err := appctypes.SanitizeACName(c.Name)
if err != nil {
return nil, err
}
appName := appctypes.MustACName(name)
manifest.Apps = append(manifest.Apps, appcschema.RuntimeApp{
Name: *appName,
Image: appcschema.RuntimeImage{ID: *hash},
App: imgManifest.App,
})
}
volumeMap, ok := r.volumeGetter.GetVolumes(pod.UID)
if !ok {
return nil, fmt.Errorf("cannot get the volumes for pod %q", kubeletUtil.FormatPodName(pod))
}
// Set global volumes.
for name, volume := range volumeMap {
volName, err := appctypes.NewACName(name)
if err != nil {
return nil, fmt.Errorf("cannot use the volume's name %q as ACName: %v", name, err)
}
manifest.Volumes = append(manifest.Volumes, appctypes.Volume{
Name: *volName,
Kind: "host",
Source: volume.GetPath(),
})
}
// Set global ports.
for _, port := range globalPortMappings {
name, err := appctypes.SanitizeACName(port.Name)
if err != nil {
return nil, fmt.Errorf("cannot use the port's name %q as ACName: %v", port.Name, err)
}
portName := appctypes.MustACName(name)
manifest.Ports = append(manifest.Ports, appctypes.ExposedPort{
Name: *portName,
HostPort: uint(port.HostPort),
})
}
// TODO(yifan): Set pod-level isolators once it's supported in kubernetes.
return manifest, nil
}
// setApp overrides the app's fields if any of them are specified in the
// container's spec.
func setApp(app *appctypes.App, c *api.Container, opts *kubecontainer.RunContainerOptions) error {
// Override the exec.
if len(c.Command) > 0 {
app.Exec = c.Command
}
if len(c.Args) > 0 {
app.Exec = append(app.Exec, c.Args...)
}
// TODO(yifan): Use non-root user in the future, see:
// https://github.com/coreos/rkt/issues/820
app.User, app.Group = "0", "0"
// Override the working directory.
if len(c.WorkingDir) > 0 {
app.WorkingDirectory = c.WorkingDir
}
// Merge the environment. Override the image with the ones defined in the spec if necessary.
for _, env := range opts.Envs {
if ix := findEnvInList(app.Environment, env); ix >= 0 {
app.Environment[ix].Value = env.Value
continue
}
app.Environment = append(app.Environment, appctypes.EnvironmentVariable{
Name: env.Name,
Value: env.Value,
})
}
// Override the mount points.
if len(opts.Mounts) > 0 {
app.MountPoints = []appctypes.MountPoint{}
}
for _, m := range opts.Mounts {
mountPointName, err := appctypes.NewACName(m.Name)
if err != nil {
return err
}
app.MountPoints = append(app.MountPoints, appctypes.MountPoint{
Name: *mountPointName,
Path: m.ContainerPath,
ReadOnly: m.ReadOnly,
})
}
// Override the ports.
if len(opts.PortMappings) > 0 {
app.Ports = []appctypes.Port{}
}
for _, p := range opts.PortMappings {
name, err := appctypes.SanitizeACName(p.Name)
if err != nil {
return err
}
portName := appctypes.MustACName(name)
app.Ports = append(app.Ports, appctypes.Port{
Name: *portName,
Protocol: string(p.Protocol),
Port: uint(p.ContainerPort),
})
}
// Override isolators.
return setIsolators(app, c)
}
// convertToACName converts a string into ACName.
func convertToACName(name string) appctypes.ACName {
// Note that as the 'name' already matches 'DNS_LABEL'
// defined in pkg/api/types.go, there shouldn't be error or panic.
acname, _ := appctypes.SanitizeACName(name)
return *appctypes.MustACName(acname)
}
// makePodManifest transforms a kubelet pod spec to the rkt pod manifest.
func (r *Runtime) makePodManifest(pod *api.Pod, pullSecrets []api.Secret) (*appcschema.PodManifest, error) {
var globalPortMappings []kubecontainer.PortMapping
manifest := appcschema.BlankPodManifest()
listResp, err := r.apisvc.ListPods(context.Background(), &rktapi.ListPodsRequest{
Detail: true,
Filters: kubernetesPodFilters(pod.UID),
})
if err != nil {
return nil, fmt.Errorf("couldn't list pods: %v", err)
}
restartCount := 0
for _, pod := range listResp.Pods {
manifest := &appcschema.PodManifest{}
err = json.Unmarshal(pod.Manifest, manifest)
if err != nil {
glog.Warningf("rkt: error unmatshaling pod manifest: %v", err)
continue
}
if countString, ok := manifest.Annotations.Get(k8sRktRestartCountAnno); ok {
num, err := strconv.Atoi(countString)
if err != nil {
glog.Warningf("rkt: error reading restart count on pod: %v", err)
continue
}
if num+1 > restartCount {
restartCount = num + 1
}
}
}
manifest.Annotations.Set(*appctypes.MustACIdentifier(k8sRktKubeletAnno), k8sRktKubeletAnnoValue)
manifest.Annotations.Set(*appctypes.MustACIdentifier(k8sRktUIDAnno), string(pod.UID))
manifest.Annotations.Set(*appctypes.MustACIdentifier(k8sRktNameAnno), pod.Name)
manifest.Annotations.Set(*appctypes.MustACIdentifier(k8sRktNamespaceAnno), pod.Namespace)
manifest.Annotations.Set(*appctypes.MustACIdentifier(k8sRktCreationTimeAnno), strconv.FormatInt(time.Now().Unix(), 10))
manifest.Annotations.Set(*appctypes.MustACIdentifier(k8sRktRestartCountAnno), strconv.Itoa(restartCount))
for _, c := range pod.Spec.Containers {
app, portMappings, err := r.newAppcRuntimeApp(pod, c, pullSecrets)
if err != nil {
return nil, err
}
manifest.Apps = append(manifest.Apps, *app)
globalPortMappings = append(globalPortMappings, portMappings...)
}
volumeMap, ok := r.volumeGetter.GetVolumes(pod.UID)
if !ok {
return nil, fmt.Errorf("cannot get the volumes for pod %q", format.Pod(pod))
}
// Set global volumes.
for name, volume := range volumeMap {
volName, err := appctypes.NewACName(name)
if err != nil {
return nil, fmt.Errorf("cannot use the volume's name %q as ACName: %v", name, err)
}
manifest.Volumes = append(manifest.Volumes, appctypes.Volume{
Name: *volName,
Kind: "host",
Source: volume.Builder.GetPath(),
})
}
// Set global ports.
for _, port := range globalPortMappings {
name, err := appctypes.SanitizeACName(port.Name)
if err != nil {
return nil, fmt.Errorf("cannot use the port's name %q as ACName: %v", port.Name, err)
}
portName := appctypes.MustACName(name)
manifest.Ports = append(manifest.Ports, appctypes.ExposedPort{
Name: *portName,
HostPort: uint(port.HostPort),
})
}
// TODO(yifan): Set pod-level isolators once it's supported in kubernetes.
return manifest, nil
}