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moby--moby/volume/local/local_unix.go
Brian Goff b05b237075 Support mount opts for local volume driver
Allows users to submit options similar to the `mount` command when
creating a volume with the `local` volume driver.

For example:

```go
$ docker volume create -d local --opt type=nfs --opt device=myNfsServer:/data --opt o=noatime,nosuid
```

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
2016-03-03 10:32:25 -05:00

69 lines
1.6 KiB
Go

// +build linux freebsd
// Package local provides the default implementation for volumes. It
// is used to mount data volume containers and directories local to
// the host server.
package local
import (
"fmt"
"path/filepath"
"strings"
"github.com/docker/docker/pkg/mount"
)
var (
oldVfsDir = filepath.Join("vfs", "dir")
validOpts = map[string]bool{
"type": true, // specify the filesystem type for mount, e.g. nfs
"o": true, // generic mount options
"device": true, // device to mount from
}
)
type optsConfig struct {
MountType string
MountOpts string
MountDevice string
}
// scopedPath verifies that the path where the volume is located
// is under Docker's root and the valid local paths.
func (r *Root) scopedPath(realPath string) bool {
// Volumes path for Docker version >= 1.7
if strings.HasPrefix(realPath, filepath.Join(r.scope, volumesPathName)) && realPath != filepath.Join(r.scope, volumesPathName) {
return true
}
// Volumes path for Docker version < 1.7
if strings.HasPrefix(realPath, filepath.Join(r.scope, oldVfsDir)) {
return true
}
return false
}
func setOpts(v *localVolume, opts map[string]string) error {
if len(opts) == 0 {
return nil
}
if err := validateOpts(opts); err != nil {
return err
}
v.opts = &optsConfig{
MountType: opts["type"],
MountOpts: opts["o"],
MountDevice: opts["device"],
}
return nil
}
func (v *localVolume) mount() error {
if v.opts.MountDevice == "" {
return fmt.Errorf("missing device in volume options")
}
return mount.Mount(v.opts.MountDevice, v.path, v.opts.MountType, v.opts.MountOpts)
}