Imports k8s.io/api/core/v1 k8s.io/apimachinery/pkg/apis/meta/v1 k8s.io/client-go/kubernetes Imports in module “github.com/pingcap/tidb-operator” github.com/pingcap/tidb-operator/pkg/apis/pingcap/v1alpha1 github.com/pingcap/tidb-operator/pkg/backup/constants Standard library imports errors fmt net/url strings