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// Copyright 2015 go-dockerclient authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package docker
import (
"encoding/json"
"errors"
"net/http"
)
var (
// ErrNoSuchVolume is the error returned when the volume does not exist.
ErrNoSuchVolume = errors.New("no such volume")
// ErrVolumeInUse is the error returned when the volume requested to be removed is still in use.
ErrVolumeInUse = errors.New("volume in use and cannot be removed")
)
// Volume represents a volume.
//
// See https://goo.gl/FZA4BK for more details.
type Volume struct {
Name string `json:"Name" yaml:"Name"`
Driver string `json:"Driver,omitempty" yaml:"Driver,omitempty"`
Mountpoint string `json:"Mountpoint,omitempty" yaml:"Mountpoint,omitempty"`
Labels map[string]string `json:"Labels,omitempty" yaml:"Labels,omitempty"`
}
// ListVolumesOptions specify parameters to the ListVolumes function.
//
// See https://goo.gl/FZA4BK for more details.
type ListVolumesOptions struct {
Filters map[string][]string
}
// ListVolumes returns a list of available volumes in the server.
//
// See https://goo.gl/FZA4BK for more details.
func (c *Client) ListVolumes(opts ListVolumesOptions) ([]Volume, error) {
resp, err := c.do("GET", "/volumes?"+queryString(opts), doOptions{})
if err != nil {
return nil, err
}
defer resp.Body.Close()
m := make(map[string]interface{})
if err := json.NewDecoder(resp.Body).Decode(&m); err != nil {
return nil, err
}
var volumes []Volume
volumesJSON, ok := m["Volumes"]
if !ok {
return volumes, nil
}
data, err := json.Marshal(volumesJSON)
if err != nil {
return nil, err
}
if err := json.Unmarshal(data, &volumes); err != nil {
return nil, err
}
return volumes, nil
}
// CreateVolumeOptions specify parameters to the CreateVolume function.
//
// See https://goo.gl/pBUbZ9 for more details.
type CreateVolumeOptions struct {
Name string
Driver string
DriverOpts map[string]string
}
// CreateVolume creates a volume on the server.
//
// See https://goo.gl/pBUbZ9 for more details.
func (c *Client) CreateVolume(opts CreateVolumeOptions) (*Volume, error) {
resp, err := c.do("POST", "/volumes/create", doOptions{data: opts})
if err != nil {
return nil, err
}
defer resp.Body.Close()
var volume Volume
if err := json.NewDecoder(resp.Body).Decode(&volume); err != nil {
return nil, err
}
return &volume, nil
}
// InspectVolume returns a volume by its name.
//
// See https://goo.gl/0g9A6i for more details.
func (c *Client) InspectVolume(name string) (*Volume, error) {
resp, err := c.do("GET", "/volumes/"+name, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return nil, ErrNoSuchVolume
}
return nil, err
}
defer resp.Body.Close()
var volume Volume
if err := json.NewDecoder(resp.Body).Decode(&volume); err != nil {
return nil, err
}
return &volume, nil
}
// RemoveVolume removes a volume by its name.
//
// See https://goo.gl/79GNQz for more details.
func (c *Client) RemoveVolume(name string) error {
resp, err := c.do("DELETE", "/volumes/"+name, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok {
if e.Status == http.StatusNotFound {
return ErrNoSuchVolume
}
if e.Status == http.StatusConflict {
return ErrVolumeInUse
}
}
return nil
}
defer resp.Body.Close()
return nil
}
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