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configmap.go
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configmap.go
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package k8s
import (
"context"
"fmt"
"time"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/rest"
)
func PollForConfigMap(kubeconfig *rest.Config, namespace, name string, timeout time.Duration) error {
clientset, err := GetClientset(kubeconfig)
if err != nil {
return err
}
ctx, cancel := context.WithTimeout(context.Background(), timeout)
defer cancel()
for {
select {
case <-ctx.Done():
return fmt.Errorf("timed out waiting for configMap %s/%s", namespace, name)
default:
_, err = clientset.CoreV1().ConfigMaps(namespace).Get(context.Background(), name, metav1.GetOptions{})
if err == nil {
if !errors.IsNotFound(err) {
return nil
}
}
time.Sleep(1 * time.Second)
}
}
}
func GetConfigMapValue(kubeconfig *rest.Config, namespace, name, key string) (string, error) {
clientset, err := GetClientset(kubeconfig)
if err != nil {
return "", err
}
cm, err := clientset.CoreV1().ConfigMaps(namespace).Get(context.Background(), name, metav1.GetOptions{})
if err != nil {
if errors.IsNotFound(err) {
return "", fmt.Errorf("configMap %s/%s not found", namespace, name)
}
return "", err
}
value := cm.Data[key]
if value == "" {
return "", fmt.Errorf("key not found in ConfigMap")
}
return value, nil
}
func UpdateConfigMapValue(kubeconfig *rest.Config, namespace, name, key, value string) error {
clientset, err := GetClientset(kubeconfig)
if err != nil {
return err
}
cm, err := clientset.CoreV1().ConfigMaps(namespace).Get(context.Background(), name, metav1.GetOptions{})
if errors.IsNotFound(err) {
return fmt.Errorf("configMap not found")
}
cm.Data[key] = value
_, err = clientset.CoreV1().ConfigMaps(namespace).Update(context.Background(), cm, metav1.UpdateOptions{})
if err != nil {
return err
}
return nil
}