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apply.go
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apply.go
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package configmap
import (
"fmt"
corev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
)
// Apply applies configmap from type string, []byte, *corev1.ConfigMap,
// corev1.ConfigMap, runtime.Object, *unstructured.Unstructured,
// unstructured.Unstructured or map[string]interface{}.
func (h *Handler) Apply(obj interface{}) (*corev1.ConfigMap, error) {
switch val := obj.(type) {
case string:
return h.ApplyFromFile(val)
case []byte:
return h.ApplyFromBytes(val)
case *corev1.ConfigMap:
return h.ApplyFromObject(val)
case corev1.ConfigMap:
return h.ApplyFromObject(&val)
case *unstructured.Unstructured:
return h.ApplyFromUnstructured(val)
case unstructured.Unstructured:
return h.ApplyFromUnstructured(&val)
case map[string]interface{}:
return h.ApplyFromMap(val)
case runtime.Object:
return h.ApplyFromObject(val)
default:
return nil, ErrInvalidApplyType
}
}
// ApplyFromFile applies configmap from yaml file.
func (h *Handler) ApplyFromFile(filename string) (cm *corev1.ConfigMap, err error) {
cm, err = h.CreateFromFile(filename)
if k8serrors.IsAlreadyExists(err) { // if configmap already exist, update it.
cm, err = h.UpdateFromFile(filename)
}
return
}
// ApplyFromBytes pply configmap from bytes.
func (h *Handler) ApplyFromBytes(data []byte) (cm *corev1.ConfigMap, err error) {
cm, err = h.CreateFromBytes(data)
if k8serrors.IsAlreadyExists(err) {
cm, err = h.UpdateFromBytes(data)
}
return
}
// ApplyFromObject applies configmap from runtime.Object.
func (h *Handler) ApplyFromObject(obj runtime.Object) (*corev1.ConfigMap, error) {
cm, ok := obj.(*corev1.ConfigMap)
if !ok {
return nil, fmt.Errorf("object type is not *corev1.ConfigMap")
}
return h.applyConfigmap(cm)
}
// ApplyFromUnstructured applies configmap from *unstructured.Unstructured.
func (h *Handler) ApplyFromUnstructured(u *unstructured.Unstructured) (*corev1.ConfigMap, error) {
cm := &corev1.ConfigMap{}
err := runtime.DefaultUnstructuredConverter.FromUnstructured(u.UnstructuredContent(), cm)
if err != nil {
return nil, err
}
return h.applyConfigmap(cm)
}
// ApplyFromMap applies configmap from map[string]interface{}.
func (h *Handler) ApplyFromMap(u map[string]interface{}) (*corev1.ConfigMap, error) {
cm := &corev1.ConfigMap{}
err := runtime.DefaultUnstructuredConverter.FromUnstructured(u, cm)
if err != nil {
return nil, err
}
return h.applyConfigmap(cm)
}
// applyConfigmap
func (h *Handler) applyConfigmap(cm *corev1.ConfigMap) (*corev1.ConfigMap, error) {
_, err := h.createConfigmap(cm)
if k8serrors.IsAlreadyExists(err) {
return h.updateConfigmap(cm)
}
return cm, err
}