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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 (
"context"
"encoding/json"
"errors"
"net/http"
"time"
)
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/3wgTsd for more details.
type Volume struct {
Name string `json:"Name" yaml:"Name" toml:"Name"`
Driver string `json:"Driver,omitempty" yaml:"Driver,omitempty" toml:"Driver,omitempty"`
Mountpoint string `json:"Mountpoint,omitempty" yaml:"Mountpoint,omitempty" toml:"Mountpoint,omitempty"`
Labels map[string]string `json:"Labels,omitempty" yaml:"Labels,omitempty" toml:"Labels,omitempty"`
Options map[string]string `json:"Options,omitempty" yaml:"Options,omitempty" toml:"Options,omitempty"`
CreatedAt time.Time `json:"CreatedAt,omitempty" yaml:"CreatedAt,omitempty" toml:"CreatedAt,omitempty"`
}
// ListVolumesOptions specify parameters to the ListVolumes function.
//
// See https://goo.gl/3wgTsd for more details.
type ListVolumesOptions struct {
Filters map[string][]string
Context context.Context
}
// ListVolumes returns a list of available volumes in the server.
//
// See https://goo.gl/3wgTsd for more details.
func (c *Client) ListVolumes(opts ListVolumesOptions) ([]Volume, error) {
resp, err := c.do(http.MethodGet, "/volumes?"+queryString(opts), doOptions{
context: opts.Context,
})
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/qEhmEC for more details.
type CreateVolumeOptions struct {
Name string
Driver string
DriverOpts map[string]string
Context context.Context `json:"-"`
Labels map[string]string
}
// CreateVolume creates a volume on the server.
//
// See https://goo.gl/qEhmEC for more details.
func (c *Client) CreateVolume(opts CreateVolumeOptions) (*Volume, error) {
resp, err := c.do(http.MethodPost, "/volumes/create", doOptions{
data: opts,
context: opts.Context,
})
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/GMjsMc for more details.
func (c *Client) InspectVolume(name string) (*Volume, error) {
resp, err := c.do(http.MethodGet, "/volumes/"+name, doOptions{})
if err != nil {
var e *Error
if errors.As(err, &e) && 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.
//
// Deprecated: Use RemoveVolumeWithOptions instead.
func (c *Client) RemoveVolume(name string) error {
return c.RemoveVolumeWithOptions(RemoveVolumeOptions{Name: name})
}
// RemoveVolumeOptions specify parameters to the RemoveVolumeWithOptions
// function.
//
// See https://goo.gl/nvd6qj for more details.
type RemoveVolumeOptions struct {
Context context.Context
Name string `qs:"-"`
Force bool
}
// RemoveVolumeWithOptions removes a volume by its name and takes extra
// parameters.
//
// See https://goo.gl/nvd6qj for more details.
func (c *Client) RemoveVolumeWithOptions(opts RemoveVolumeOptions) error {
path := "/volumes/" + opts.Name
resp, err := c.do(http.MethodDelete, path+"?"+queryString(opts), doOptions{context: opts.Context})
if err != nil {
var e *Error
if errors.As(err, &e) {
if e.Status == http.StatusNotFound {
return ErrNoSuchVolume
}
if e.Status == http.StatusConflict {
return ErrVolumeInUse
}
}
return err
}
defer resp.Body.Close()
return nil
}
// PruneVolumesOptions specify parameters to the PruneVolumes function.
//
// See https://goo.gl/f9XDem for more details.
type PruneVolumesOptions struct {
Filters map[string][]string
Context context.Context
}
// PruneVolumesResults specify results from the PruneVolumes function.
//
// See https://goo.gl/f9XDem for more details.
type PruneVolumesResults struct {
VolumesDeleted []string
SpaceReclaimed int64
}
// PruneVolumes deletes volumes which are unused.
//
// See https://goo.gl/f9XDem for more details.
func (c *Client) PruneVolumes(opts PruneVolumesOptions) (*PruneVolumesResults, error) {
path := "/volumes/prune?" + queryString(opts)
resp, err := c.do(http.MethodPost, path, doOptions{context: opts.Context})
if err != nil {
return nil, err
}
defer resp.Body.Close()
var results PruneVolumesResults
if err := json.NewDecoder(resp.Body).Decode(&results); err != nil {
return nil, err
}
return &results, nil
}
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