forked from coreos/coreos-kubernetes
/
metadata.go
71 lines (59 loc) · 1.79 KB
/
metadata.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metadata
import (
"strings"
"github.com/coreos/coreos-cloudinit/pkg"
)
type MetadataService struct {
Root string
Client pkg.Getter
ApiVersion string
UserdataPath string
MetadataPath string
}
func NewDatasource(root, apiVersion, userdataPath, metadataPath string) MetadataService {
if !strings.HasSuffix(root, "/") {
root += "/"
}
return MetadataService{root, pkg.NewHttpClient(), apiVersion, userdataPath, metadataPath}
}
func (ms MetadataService) IsAvailable() bool {
_, err := ms.Client.Get(ms.Root + ms.ApiVersion)
return (err == nil)
}
func (ms MetadataService) AvailabilityChanges() bool {
return true
}
func (ms MetadataService) ConfigRoot() string {
return ms.Root
}
func (ms MetadataService) FetchUserdata() ([]byte, error) {
return ms.FetchData(ms.UserdataUrl())
}
func (ms MetadataService) FetchData(url string) ([]byte, error) {
if data, err := ms.Client.GetRetry(url); err == nil {
return data, err
} else if _, ok := err.(pkg.ErrNotFound); ok {
return []byte{}, nil
} else {
return data, err
}
}
func (ms MetadataService) MetadataUrl() string {
return (ms.Root + ms.MetadataPath)
}
func (ms MetadataService) UserdataUrl() string {
return (ms.Root + ms.UserdataPath)
}