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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
// +build amd64,linux arm64,linux amd64,darwin arm64,darwin
package machine
import (
"crypto/sha256"
"io/ioutil"
url2 "net/url"
"os"
"path/filepath"
"runtime"
"strings"
digest "github.com/opencontainers/go-digest"
)
// These should eventually be moved into machine/qemu as
// they are specific to running qemu
var (
artifact string = "qemu"
Format string = "qcow2.xz"
)
type FcosDownload struct {
Download
}
func NewFcosDownloader(vmType, vmName string) (DistributionDownload, error) {
info, err := getFCOSDownload()
if err != nil {
return nil, err
}
urlSplit := strings.Split(info.Location, "/")
imageName := urlSplit[len(urlSplit)-1]
url, err := url2.Parse(info.Location)
if err != nil {
return nil, err
}
dataDir, err := GetDataDir(vmType)
if err != nil {
return nil, err
}
fcd := FcosDownload{
Download: Download{
Arch: getFcosArch(),
Artifact: artifact,
Format: Format,
ImageName: imageName,
LocalPath: filepath.Join(dataDir, imageName),
Sha256sum: info.Sha256Sum,
URL: url,
VMName: vmName,
},
}
fcd.Download.LocalUncompressedFile = fcd.getLocalUncompressedName()
return fcd, nil
}
func (f FcosDownload) getLocalUncompressedName() string {
uncompressedFilename := filepath.Join(filepath.Dir(f.LocalPath), f.VMName+"_"+f.ImageName)
return strings.TrimSuffix(uncompressedFilename, ".xz")
}
func (f FcosDownload) DownloadImage() error {
// check if the latest image is already present
ok, err := UpdateAvailable(&f.Download)
if err != nil {
return err
}
if !ok {
if err := DownloadVMImage(f.URL, f.LocalPath); err != nil {
return err
}
}
return Decompress(f.LocalPath, f.getLocalUncompressedName())
}
func (f FcosDownload) Get() *Download {
return &f.Download
}
type fcosDownloadInfo struct {
CompressionType string
Location string
Release string
Sha256Sum string
}
func UpdateAvailable(d *Download) (bool, error) {
// check the sha of the local image if it exists
// get the sha of the remote image
// == dont bother to pull
if _, err := os.Stat(d.LocalPath); os.IsNotExist(err) {
return false, nil
}
b, err := ioutil.ReadFile(d.LocalPath)
if err != nil {
return false, err
}
s := sha256.Sum256(b)
sum := digest.NewDigestFromBytes(digest.SHA256, s[:])
return sum.Encoded() == d.Sha256sum, nil
}
func getFcosArch() string {
var arch string
// TODO fill in more architectures
switch runtime.GOARCH {
case "arm64":
arch = "aarch64"
default:
arch = "x86_64"
}
return arch
}
|
