// generatePodManifest creates the pod manifest from the command line input.
// It returns the pod manifest as []byte on success.
// This is invoked if no pod manifest is specified at the command line.
func generatePodManifest(cfg PrepareConfig, dir string) ([]byte, error) {
pm := schema.PodManifest{
ACKind: "PodManifest",
Apps: make(schema.AppList, 0),
}
v, err := types.NewSemVer(version.Version)
if err != nil {
return nil, errwrap.Wrap(errors.New("error creating version"), err)
}
pm.ACVersion = *v
if err := cfg.Apps.Walk(func(app *apps.App) error {
img := app.ImageID
am, err := cfg.Store.GetImageManifest(img.String())
if err != nil {
return errwrap.Wrap(errors.New("error getting the manifest"), err)
}
var appName *types.ACName
if app.Name != "" {
appName, err = types.NewACName(app.Name)
if err != nil {
return errwrap.Wrap(errors.New("invalid app name format"), err)
}
} else {
appName, err = imageNameToAppName(am.Name)
if err != nil {
return errwrap.Wrap(errors.New("error converting image name to app name"), err)
}
}
if _, err := prepareAppImage(cfg, *appName, img, dir, cfg.UseOverlay); err != nil {
return errwrap.Wrap(fmt.Errorf("error preparing image %s", img), err)
}
if pm.Apps.Get(*appName) != nil {
return fmt.Errorf("error: multiple apps with name %s", am.Name)
}
if am.App == nil && app.Exec == "" {
return fmt.Errorf("error: image %s has no app section and --exec argument is not provided", img)
}
ra := schema.RuntimeApp{
// TODO(vc): leverage RuntimeApp.Name for disambiguating the apps
Name: *appName,
App: am.App,
Image: schema.RuntimeImage{
Name: &am.Name,
ID: img,
Labels: am.Labels,
},
Mounts: MergeMounts(cfg.Apps.Mounts, app.Mounts),
ReadOnlyRootFS: app.ReadOnlyRootFS,
}
if app.Exec != "" {
// Create a minimal App section if not present
if am.App == nil {
ra.App = &types.App{
User: strconv.Itoa(os.Getuid()),
Group: strconv.Itoa(os.Getgid()),
}
}
ra.App.Exec = []string{app.Exec}
}
if app.Args != nil {
ra.App.Exec = append(ra.App.Exec, app.Args...)
}
if app.WorkingDir != "" {
ra.App.WorkingDirectory = app.WorkingDir
}
if err := prepareIsolators(app, ra.App); err != nil {
return err
}
if app.User != "" {
ra.App.User = app.User
}
if app.Group != "" {
ra.App.Group = app.Group
}
if app.SupplementaryGIDs != nil {
ra.App.SupplementaryGIDs = app.SupplementaryGIDs
}
if app.UserAnnotations != nil {
ra.App.UserAnnotations = app.UserAnnotations
}
if app.UserLabels != nil {
ra.App.UserLabels = app.UserLabels
}
// loading the environment from the lowest priority to highest
if cfg.InheritEnv {
// Inherit environment does not override app image environment
mergeEnvs(&ra.App.Environment, os.Environ(), false)
}
mergeEnvs(&ra.App.Environment, cfg.EnvFromFile, true)
mergeEnvs(&ra.App.Environment, cfg.ExplicitEnv, true)
if app.Environments != nil {
envs := make([]string, 0, len(app.Environments))
for name, value := range app.Environments {
envs = append(envs, fmt.Sprintf("%s=%s", name, value))
}
mergeEnvs(&ra.App.Environment, envs, true)
}
pm.Apps = append(pm.Apps, ra)
return nil
}); err != nil {
return nil, err
}
// TODO(jonboulle): check that app mountpoint expectations are
// satisfied here, rather than waiting for stage1
pm.Volumes = cfg.Apps.Volumes
// Check to see if ports have any errors
pm.Ports = cfg.Ports
if _, err := commonnet.ForwardedPorts(&pm); err != nil {
return nil, err
}
pm.Annotations = append(pm.Annotations, types.Annotation{
Name: "coreos.com/rkt/stage1/mutable",
Value: strconv.FormatBool(cfg.Mutable),
})
pm.UserAnnotations = cfg.UserAnnotations
pm.UserLabels = cfg.UserLabels
pmb, err := json.Marshal(pm)
if err != nil {
return nil, errwrap.Wrap(errors.New("error marshalling pod manifest"), err)
}
return pmb, nil
}