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
|
// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package utilization
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
)
const (
azureHostname = "169.254.169.254"
azureEndpointPath = "/metadata/instance/compute?api-version=2017-03-01"
azureEndpoint = "http://" + azureHostname + azureEndpointPath
)
type azure struct {
Location string `json:"location,omitempty"`
Name string `json:"name,omitempty"`
VMID string `json:"vmId,omitempty"`
VMSize string `json:"vmSize,omitempty"`
}
func gatherAzure(util *Data, client *http.Client) error {
az, err := getAzure(client)
if err != nil {
// Only return the error here if it is unexpected to prevent
// warning customers who aren't running Azure about a timeout.
if _, ok := err.(unexpectedAzureErr); ok {
return err
}
return nil
}
util.Vendors.Azure = az
return nil
}
type unexpectedAzureErr struct{ e error }
func (e unexpectedAzureErr) Error() string {
return fmt.Sprintf("unexpected Azure error: %v", e.e)
}
func getAzure(client *http.Client) (*azure, error) {
req, err := http.NewRequest("GET", azureEndpoint, nil)
if err != nil {
return nil, err
}
req.Header.Add("Metadata", "true")
response, err := client.Do(req)
if err != nil {
// No unexpectedAzureErr here: a timeout isusually going to
// happen.
return nil, err
}
defer response.Body.Close()
if response.StatusCode != 200 {
return nil, unexpectedAzureErr{e: fmt.Errorf("response code %d", response.StatusCode)}
}
data, err := ioutil.ReadAll(response.Body)
if err != nil {
return nil, unexpectedAzureErr{e: err}
}
az := &azure{}
if err := json.Unmarshal(data, az); err != nil {
return nil, unexpectedAzureErr{e: err}
}
if err := az.validate(); err != nil {
return nil, unexpectedAzureErr{e: err}
}
return az, nil
}
func (az *azure) validate() (err error) {
az.Location, err = normalizeValue(az.Location)
if err != nil {
return fmt.Errorf("Invalid location: %v", err)
}
az.Name, err = normalizeValue(az.Name)
if err != nil {
return fmt.Errorf("Invalid name: %v", err)
}
az.VMID, err = normalizeValue(az.VMID)
if err != nil {
return fmt.Errorf("Invalid VM ID: %v", err)
}
az.VMSize, err = normalizeValue(az.VMSize)
if err != nil {
return fmt.Errorf("Invalid VM size: %v", err)
}
return
}
|
