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configmap.go
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configmap.go
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package storage
import (
"context"
"fmt"
logr "github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
)
type ConfigMap struct {
name string
nameSpace string
kubeClient *kubernetes.Clientset
}
func (cm *ConfigMap) GetName() string {
return cm.name
}
func (cm *ConfigMap) GetNameSpace() string {
return cm.nameSpace
}
func (cm *ConfigMap) SetKubeClient(cli *kubernetes.Clientset) *ConfigMap {
cm.kubeClient = cli
return cm
}
func NewConfigMap(name, ns string) *ConfigMap {
return &ConfigMap{name: name, nameSpace: ns}
}
func (cm *ConfigMap) Read() (map[string]string, error) {
obj, err := cm.get()
if err != nil {
return nil, err
}
return obj.Data, nil
}
func (cm *ConfigMap) ReadByKey(key string) (string, error) {
obj, err := cm.get()
if err != nil {
return "", err
}
return obj.Data[key], nil
}
func (cm *ConfigMap) SetKV(key, value string) error {
return cm.updateOrCreate(key, value)
}
func (cm *ConfigMap) get() (*v1.ConfigMap, error) {
return cm.kubeClient.CoreV1().ConfigMaps(cm.nameSpace).Get(context.TODO(), cm.name, metav1.GetOptions{})
}
func (cm *ConfigMap) updateOrCreate(key, value string) error {
obj, err := cm.get()
if err != nil {
// not found, create it
if errors.IsNotFound(err) {
return cm.create(map[string]string{
key: value,
})
}
return err
}
newObj := obj.DeepCopy()
newObj.Data[key] = value
logr.WithField("name", fmt.Sprintf("%s/%s", obj.Namespace, obj.Name)).
Info("Update configmap")
_, err = cm.kubeClient.CoreV1().ConfigMaps(cm.nameSpace).Update(context.TODO(), newObj, metav1.UpdateOptions{})
return err
}
func (cm *ConfigMap) create(data map[string]string) error {
obj := v1.ConfigMap{
TypeMeta: metav1.TypeMeta{
Kind: "ConfigMap",
},
ObjectMeta: metav1.ObjectMeta{
Name: cm.name,
Namespace: cm.nameSpace,
},
Data: data,
}
logr.WithField("name", fmt.Sprintf("%s/%s", obj.Namespace, obj.Name)).
Info("Create configmap")
_, err := cm.kubeClient.CoreV1().ConfigMaps(obj.Namespace).Create(context.TODO(), &obj, metav1.CreateOptions{})
return err
}