add control for auto delete unused template

Author: qianjun1993

pkg/apis/tappcontroller/v1/types.go

@@ -84,6 +84,10 @@ type TAppSpec struct {
 	// Default values is false.
 	ForceDeletePod bool `json:"forceDeletePod,omitempty"`
 
+	// AutoDeleteUnusedTemplate indicates whether auto delete templates when it is unused.
+	// Default values is false.
+	AutoDeleteUnusedTemplate bool `json:"autoDeleteUnusedTemplate,omitempty"`
+
 	// NeverMigrate indicates whether to migrate pods. If it is true, pods will never be migrated to
 	// other nodes, otherwise it depends on other conditions(e.g. pod restart policy).
 	NeverMigrate bool `json:"neverMigrate,omitempty"`

pkg/tapp/controller.go

@@ -491,6 +491,9 @@ func (c *Controller) setDefaultValue(tapp *tappv1.TApp) {
 }
 
 func (c *Controller) removeUnusedTemplate(tapp *tappv1.TApp) error {
+	if !tapp.Spec.AutoDeleteUnusedTemplate {
+		return nil
+	}
 	templateMap := make(map[string]bool, len(tapp.Spec.TemplatePool))
 	for k := range tapp.Spec.TemplatePool {
 		templateMap[k] = true