// iterate performs a single iteration of all the templates, executing each template in order
func (l *OptionsLoader) iterate(userConfig interface{}, current interface{}) (interface{}, error) {
sort.Sort(l.templates)
t := reflect.TypeOf(current).Elem()
next := reflect.New(t).Interface()
// Copy the current state before applying rules; they act as defaults
utils.JsonMergeStruct(next, current)
for _, t := range l.templates {
glog.V(2).Infof("executing template %s (tags=%s)", t.Name, t.Tags)
var buffer bytes.Buffer
err := t.Template.ExecuteTemplate(&buffer, t.Name, current)
if err != nil {
return nil, fmt.Errorf("error executing template %q: %v", t.Name, err)
}
yamlBytes := buffer.Bytes()
jsonBytes, err := utils.YamlToJson(yamlBytes)
if err != nil {
// TODO: It would be nice if yaml returned us the line number here
glog.Infof("error parsing yaml. yaml follows:")
for i, line := range strings.Split(string(yamlBytes), "\n") {
fmt.Fprintf(os.Stderr, "%3d: %s\n", i, line)
}
return nil, fmt.Errorf("error parsing yaml %q: %v", t.Name, err)
}
err = json.Unmarshal(jsonBytes, next)
if err != nil {
return nil, fmt.Errorf("error parsing yaml (converted to JSON) %q: %v", t.Name, err)
}
}
// Also copy the user-provided values after applying rules; they act as overrides now
utils.JsonMergeStruct(next, userConfig)
return next, nil
}
func (l *Loader) BuildCompleteSpec(clusterSpec *api.ClusterSpec, modelStore string, models []string) (*api.ClusterSpec, error) {
// First pass: load options
tw := &loader.TreeWalker{
DefaultHandler: ignoreHandler,
Contexts: map[string]loader.Handler{
"resources": ignoreHandler,
},
Extensions: map[string]loader.Handler{
".options": l.OptionsLoader.HandleOptions,
},
Tags: l.Tags,
}
for _, model := range models {
modelDir := path.Join(modelStore, model)
err := tw.Walk(modelDir)
if err != nil {
return nil, err
}
}
loaded, err := l.OptionsLoader.Build(clusterSpec)
if err != nil {
return nil, err
}
completed := &api.ClusterSpec{}
*completed = *(loaded.(*api.ClusterSpec))
// Master kubelet config = (base kubelet config + master kubelet config)
masterKubelet := &api.KubeletConfig{}
utils.JsonMergeStruct(masterKubelet, completed.Kubelet)
utils.JsonMergeStruct(masterKubelet, completed.MasterKubelet)
completed.MasterKubelet = masterKubelet
glog.V(1).Infof("options: %s", fi.DebugAsJsonStringIndent(completed))
return completed, nil
}