Imports k8s.io/apimachinery/pkg/util/validation/field k8s.io/kops/pkg/acls k8s.io/kops/pkg/apis/kops k8s.io/kops/pkg/client/simple k8s.io/kops/upup/pkg/fi/utils k8s.io/kops/util/pkg/vfs Standard library imports fmt os strings