1// Copyright 2015 Google Inc. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15// Handler for /validate content.
16// Validates cadvisor dependencies - kernel, os, docker setup.
17
18package docker
19
20import (
21	"sync"
22
23	dclient "github.com/fsouza/go-dockerclient"
24)
25
26var (
27	dockerClient    *dclient.Client
28	dockerClientErr error
29	once            sync.Once
30)
31
32func Client() (*dclient.Client, error) {
33	once.Do(func() {
34		dockerClient, dockerClientErr = dclient.NewClient(*ArgDockerEndpoint)
35	})
36	return dockerClient, dockerClientErr
37}
38