75 lines
2.0 KiB
Go
75 lines
2.0 KiB
Go
package util
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import (
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"context"
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"fmt"
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corev1 "k8s.io/api/core/v1"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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kubeclient "k8s.io/client-go/kubernetes"
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)
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// IsNamespaceExist tells if specific already exists.
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func IsNamespaceExist(client kubeclient.Interface, namespace string) (bool, error) {
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_, err := client.CoreV1().Namespaces().Get(context.Background(), namespace, metav1.GetOptions{})
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if err != nil {
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if apierrors.IsNotFound(err) {
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return false, nil
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}
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return false, err
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}
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return true, nil
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}
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// CreateNamespace just try to create the namespace.
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func CreateNamespace(client kubeclient.Interface, namespaceObj *corev1.Namespace) (*corev1.Namespace, error) {
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_, err := client.CoreV1().Namespaces().Create(context.TODO(), namespaceObj, metav1.CreateOptions{})
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if err != nil {
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if apierrors.IsAlreadyExists(err) {
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return namespaceObj, nil
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}
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return nil, err
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}
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return namespaceObj, nil
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}
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// DeleteNamespace just try to delete the namespace.
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func DeleteNamespace(client kubeclient.Interface, namespace string) error {
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err := client.CoreV1().Namespaces().Delete(context.Background(), namespace, metav1.DeleteOptions{})
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if err != nil && !apierrors.IsNotFound(err) {
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return err
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}
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return nil
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}
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// EnsureNamespaceExist makes sure that the specific namespace exist in cluster.
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// If namespace not exit, just create it.
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func EnsureNamespaceExist(client kubeclient.Interface, namespace string, dryRun bool) (*corev1.Namespace, error) {
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namespaceObj := &corev1.Namespace{}
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namespaceObj.ObjectMeta.Name = namespace
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if dryRun {
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return namespaceObj, nil
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}
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exist, err := IsNamespaceExist(client, namespace)
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if err != nil {
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return nil, fmt.Errorf("failed to check if namespace exist. namespace: %s, error: %v", namespace, err)
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}
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if exist {
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return namespaceObj, nil
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}
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createdObj, err := CreateNamespace(client, namespaceObj)
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if err != nil {
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return nil, fmt.Errorf("ensure namespace failed due to create failed. namespace: %s, error: %v", namespace, err)
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}
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return createdObj, nil
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}
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