/
aws_ebs.go
164 lines (130 loc) · 3.47 KB
/
aws_ebs.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
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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
package infranetes_flex
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/apporbit/infranetes/pkg/infranetes_flex"
)
func init() {
infranetes_flex.DevProviders.RegisterProvider("aws_ebs", NewAWSEBSProvider)
}
type awsEbsConfig struct {
Region string
AvailZone string
AttachDevice string
SelfInstanceId string
}
type awsEbsProvider struct {
ec2Client *ec2.EC2
config *awsEbsConfig
}
func NewAWSEBSProvider() (infranetes_flex.DevProvider, error) {
var config awsEbsConfig
file, err := ioutil.ReadFile("/root/aws_ebs.conf")
if err != nil {
return nil, fmt.Errorf("File error: %v\n", err)
}
json.Unmarshal(file, &config)
creds := credentials.NewChainCredentials(
[]credentials.Provider{
&credentials.EnvProvider{}, // check environment
&credentials.SharedCredentialsProvider{}, // check home dir
},
)
ec2Client := ec2.New(session.New(&aws.Config{
Credentials: creds,
Region: &config.Region,
//CredentialsChainVerboseErrors: aws.Bool(true),
HTTPClient: &http.Client{Timeout: 30 * time.Second},
}))
return &awsEbsProvider{
ec2Client: ec2Client,
config: &config,
}, nil
}
func (p *awsEbsProvider) Provision(size uint64) (*string, error) {
isize := int64(size)
req := &ec2.CreateVolumeInput{
Size: &isize,
AvailabilityZone: &p.config.AvailZone,
}
resp, err := p.ec2Client.CreateVolume(req)
if err != nil {
return nil, fmt.Errorf("provision failed: %v", err)
}
return resp.VolumeId, nil
}
func (p *awsEbsProvider) Attach(vol *string) (*string, error) {
req := &ec2.AttachVolumeInput{
VolumeId: vol,
Device: &p.config.AttachDevice,
InstanceId: &p.config.SelfInstanceId,
}
_, err := p.ec2Client.AttachVolume(req)
if err != nil {
return nil, err
}
if err := p.wait_attach(vol); err != nil {
return nil, fmt.Errorf("do_attach: attach never being active: %v", err)
}
return &p.config.AttachDevice, nil
}
func (p *awsEbsProvider) wait_attach(vol *string) error {
req := &ec2.DescribeVolumesInput{
VolumeIds: []*string{vol},
}
for i := 1; i <= 5; i++ {
resp, err := p.ec2Client.DescribeVolumes(req)
if err != nil {
return err
}
if len(resp.Volumes) != 1 {
return fmt.Errorf("wait_attach: describe didn't return any volumes")
}
if len(resp.Volumes[0].Attachments) == 1 {
if "attached" == *resp.Volumes[0].Attachments[0].State {
return nil
}
}
time.Sleep(time.Duration(i) * time.Second)
}
return fmt.Errorf("timed out waiting for volume attachment")
}
func (p *awsEbsProvider) Detach(vol *string) error {
req := &ec2.DetachVolumeInput{
VolumeId: vol,
}
_, err := p.ec2Client.DetachVolume(req)
if err != nil {
return err
}
if err := p.wait_detach(vol); err != nil {
return fmt.Errorf("do_detach: detach never succeeded: %v", err)
}
return nil
}
func (p *awsEbsProvider) wait_detach(vol *string) error {
req := &ec2.DescribeVolumesInput{
VolumeIds: []*string{vol},
}
for i := 1; i <= 5; i++ {
resp, err := p.ec2Client.DescribeVolumes(req)
if err != nil {
return err
}
if len(resp.Volumes) != 1 {
return fmt.Errorf("wait_detach: describe didn't return any volumes")
}
if "available" == *resp.Volumes[0].State {
return nil
}
time.Sleep(time.Duration(i) * time.Second)
}
return fmt.Errorf("timed out waiting for volume detachment")
}