70ffb12c1b
Put the overlay plugin in a separate package to allow the overlay package to be used without needing to import and initialize the plugin. Signed-off-by: Derek McGowan <derek@mcg.dev>
58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
// +build linux
|
|
|
|
/*
|
|
Copyright The containerd Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package overlay
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/containerd/containerd/platforms"
|
|
"github.com/containerd/containerd/plugin"
|
|
"github.com/containerd/containerd/snapshots/overlay"
|
|
)
|
|
|
|
// Config represents configuration for the overlay plugin.
|
|
type Config struct {
|
|
// Root directory for the plugin
|
|
RootPath string `toml:"root_path"`
|
|
}
|
|
|
|
func init() {
|
|
plugin.Register(&plugin.Registration{
|
|
Type: plugin.SnapshotPlugin,
|
|
ID: "overlayfs",
|
|
Config: &Config{},
|
|
InitFn: func(ic *plugin.InitContext) (interface{}, error) {
|
|
ic.Meta.Platforms = append(ic.Meta.Platforms, platforms.DefaultSpec())
|
|
|
|
config, ok := ic.Config.(*Config)
|
|
if !ok {
|
|
return nil, errors.New("invalid overlay configuration")
|
|
}
|
|
|
|
root := ic.Root
|
|
if config.RootPath != "" {
|
|
root = config.RootPath
|
|
}
|
|
|
|
ic.Meta.Exports["root"] = root
|
|
return overlay.NewSnapshotter(root, overlay.AsynchronousRemove)
|
|
},
|
|
})
|
|
}
|