github.com/containerd/containerd@v22.0.0-20200918172823-438c87b8e050+incompatible/snapshotter_opts_unix.go (about)

     1  // +build !windows
     2  
     3  /*
     4     Copyright The containerd Authors.
     5  
     6     Licensed under the Apache License, Version 2.0 (the "License");
     7     you may not use this file except in compliance with the License.
     8     You may obtain a copy of the License at
     9  
    10         http://www.apache.org/licenses/LICENSE-2.0
    11  
    12     Unless required by applicable law or agreed to in writing, software
    13     distributed under the License is distributed on an "AS IS" BASIS,
    14     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    15     See the License for the specific language governing permissions and
    16     limitations under the License.
    17  */
    18  
    19  package containerd
    20  
    21  import (
    22  	"fmt"
    23  
    24  	"github.com/containerd/containerd/snapshots"
    25  )
    26  
    27  // WithRemapperLabels creates the labels used by any supporting snapshotter
    28  // to shift the filesystem ownership (user namespace mapping) automatically; currently
    29  // supported by the fuse-overlayfs snapshotter
    30  func WithRemapperLabels(ctrUID, hostUID, ctrGID, hostGID, length uint32) snapshots.Opt {
    31  	return snapshots.WithLabels(map[string]string{
    32  		"containerd.io/snapshot/uidmapping": fmt.Sprintf("%d:%d:%d", ctrUID, hostUID, length),
    33  		"containerd.io/snapshot/gidmapping": fmt.Sprintf("%d:%d:%d", ctrGID, hostGID, length),
    34  	})
    35  }