/
update_scale.go
107 lines (97 loc) · 3.39 KB
/
update_scale.go
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package statefulset
import (
"encoding/json"
"fmt"
"io/ioutil"
appsv1 "k8s.io/api/apps/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/yaml"
)
// Scale set statefulset replicas from type string, []byte, *appsv1.StatefulSet,
// appsv1.StatefulSet, metav1.Object, runtime.Object, *unstructured.Unstructured,
// unstructured.Unstructured or map[string]interface{}.
//
// If passed parameter type is string, it will simply call ScaleByName instead of ScaleFromFile.
// You should always explicitly call ScaleFromFile to set statefulset replicas from file path.
func (h *Handler) Scale(obj interface{}, replicas int32) (*appsv1.StatefulSet, error) {
switch val := obj.(type) {
case string:
return h.ScaleByName(val, replicas)
case []byte:
return h.ScaleFromBytes(val, replicas)
case *appsv1.StatefulSet:
return h.ScaleFromObject(val, replicas)
case appsv1.StatefulSet:
return h.ScaleFromObject(&val, replicas)
case *unstructured.Unstructured:
return h.ScaleFromUnstructured(val, replicas)
case unstructured.Unstructured:
return h.ScaleFromUnstructured(&val, replicas)
case map[string]interface{}:
return h.ScaleFromMap(val, replicas)
case metav1.Object, runtime.Object:
return h.ScaleFromObject(val, replicas)
default:
return nil, ErrInvalidScaleType
}
}
// ScaleByName scale statefulset by name.
func (h *Handler) ScaleByName(name string, replicas int32) (*appsv1.StatefulSet, error) {
sts, err := h.Get(name)
if err != nil {
return nil, err
}
copiedSts := sts.DeepCopy()
if copiedSts.Spec.Replicas != nil {
copiedSts.Spec.Replicas = &replicas
}
return h.Update(copiedSts)
}
// ScaleFromFile scale statefulset from yaml or json file.
func (h *Handler) ScaleFromFile(filename string, replicas int32) (*appsv1.StatefulSet, error) {
data, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
return h.ScaleFromBytes(data, replicas)
}
// ScaleFromBytes scale statefulset from bytes data.
func (h *Handler) ScaleFromBytes(data []byte, replicas int32) (*appsv1.StatefulSet, error) {
stsJson, err := yaml.ToJSON(data)
if err != nil {
return nil, err
}
sts := &appsv1.StatefulSet{}
if err = json.Unmarshal(stsJson, sts); err != nil {
return nil, err
}
return h.ScaleByName(sts.Name, replicas)
}
// ScaleFromObject scale statefulset from metav1.Object or runtime.Object.
func (h *Handler) ScaleFromObject(obj interface{}, replicas int32) (*appsv1.StatefulSet, error) {
sts, ok := obj.(*appsv1.StatefulSet)
if !ok {
return nil, fmt.Errorf("object type is not *appsv1.StatefulSet")
}
return h.ScaleByName(sts.Name, replicas)
}
// ScaleFromUnstructured scale statefulset from *unstructured.Unstructured.
func (h *Handler) ScaleFromUnstructured(u *unstructured.Unstructured, replicas int32) (*appsv1.StatefulSet, error) {
sts := &appsv1.StatefulSet{}
err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.UnstructuredContent(), sts)
if err != nil {
return nil, err
}
return h.ScaleByName(sts.Name, replicas)
}
// ScaleFromMap scale statefulset from map[string]interface{}.
func (h *Handler) ScaleFromMap(u map[string]interface{}, replicas int32) (*appsv1.StatefulSet, error) {
sts := &appsv1.StatefulSet{}
err := runtime.DefaultUnstructuredConverter.FromUnstructured(u, sts)
if err != nil {
return nil, err
}
return h.ScaleByName(sts.Name, replicas)
}