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// Copyright 2016 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"
"net/http"
"net/url"
"strconv"
"github.com/docker/docker/api/types/swarm"
)
// NoSuchNode is the error returned when a given node does not exist.
type NoSuchNode struct {
ID string
Err error
}
func (err *NoSuchNode) Error() string {
if err.Err != nil {
return err.Err.Error()
}
return "No such node: " + err.ID
}
// ListNodesOptions specify parameters to the ListNodes function.
//
// See http://goo.gl/3K4GwU for more details.
type ListNodesOptions struct {
Filters map[string][]string
Context context.Context
}
// ListNodes returns a slice of nodes matching the given criteria.
//
// See http://goo.gl/3K4GwU for more details.
func (c *Client) ListNodes(opts ListNodesOptions) ([]swarm.Node, error) {
path := "/nodes?" + queryString(opts)
resp, err := c.do(http.MethodGet, path, doOptions{context: opts.Context})
if err != nil {
return nil, err
}
defer resp.Body.Close()
var nodes []swarm.Node
if err := json.NewDecoder(resp.Body).Decode(&nodes); err != nil {
return nil, err
}
return nodes, nil
}
// InspectNode returns information about a node by its ID.
//
// See http://goo.gl/WjkTOk for more details.
func (c *Client) InspectNode(id string) (*swarm.Node, error) {
resp, err := c.do(http.MethodGet, "/nodes/"+id, doOptions{})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return nil, &NoSuchNode{ID: id}
}
return nil, err
}
defer resp.Body.Close()
var node swarm.Node
if err := json.NewDecoder(resp.Body).Decode(&node); err != nil {
return nil, err
}
return &node, nil
}
// UpdateNodeOptions specify parameters to the NodeUpdate function.
//
// See http://goo.gl/VPBFgA for more details.
type UpdateNodeOptions struct {
swarm.NodeSpec
Version uint64
Context context.Context
}
// UpdateNode updates a node.
//
// See http://goo.gl/VPBFgA for more details.
func (c *Client) UpdateNode(id string, opts UpdateNodeOptions) error {
params := make(url.Values)
params.Set("version", strconv.FormatUint(opts.Version, 10))
path := "/nodes/" + id + "/update?" + params.Encode()
resp, err := c.do(http.MethodPost, path, doOptions{
context: opts.Context,
forceJSON: true,
data: opts.NodeSpec,
})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return &NoSuchNode{ID: id}
}
return err
}
resp.Body.Close()
return nil
}
// RemoveNodeOptions specify parameters to the RemoveNode function.
//
// See http://goo.gl/0SNvYg for more details.
type RemoveNodeOptions struct {
ID string
Force bool
Context context.Context
}
// RemoveNode removes a node.
//
// See http://goo.gl/0SNvYg for more details.
func (c *Client) RemoveNode(opts RemoveNodeOptions) error {
params := make(url.Values)
params.Set("force", strconv.FormatBool(opts.Force))
path := "/nodes/" + opts.ID + "?" + params.Encode()
resp, err := c.do(http.MethodDelete, path, doOptions{context: opts.Context})
if err != nil {
if e, ok := err.(*Error); ok && e.Status == http.StatusNotFound {
return &NoSuchNode{ID: opts.ID}
}
return err
}
resp.Body.Close()
return nil
}
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