forked from kubernetes/cloud-provider-vsphere
-
Notifications
You must be signed in to change notification settings - Fork 0
/
credentialmanager.go
205 lines (178 loc) · 6.71 KB
/
credentialmanager.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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
/*
Copyright 2018 The Kubernetes Authors.
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 credentialmanager
import (
"errors"
"io/ioutil"
"net/http"
"strings"
"github.com/golang/glog"
corev1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
)
// Error Messages
const (
CredentialsNotFoundErrMsg = "Credentials not found"
CredentialMissingErrMsg = "Username/Password is missing"
UnknownSecretKeyErrMsg = "Unknown secret key"
)
// Error constants
var (
ErrCredentialsNotFound = errors.New(CredentialsNotFoundErrMsg)
ErrCredentialMissing = errors.New(CredentialMissingErrMsg)
ErrUnknownSecretKey = errors.New(UnknownSecretKeyErrMsg)
)
// GetCredential returns credentials for the given vCenter Server.
// GetCredential returns error if Secret is not added or SecretDirectory is not set (ie No Creds).
func (secretCredentialManager *SecretCredentialManager) GetCredential(server string) (*Credential, error) {
//get the creds using the K8s listener if it exists
if secretCredentialManager.SecretLister != nil {
err := secretCredentialManager.updateCredentialsMapK8s()
if err != nil {
statusErr, ok := err.(*apierrors.StatusError)
if (ok && statusErr.ErrStatus.Code != http.StatusNotFound) || !ok {
return nil, err
}
// Handle secrets deletion by finding credentials from cache
glog.Warningf("secret %q not found in namespace %q", secretCredentialManager.SecretName, secretCredentialManager.SecretNamespace)
}
}
//get the creds using the Secrets File if it exists
if secretCredentialManager.SecretsDirectory != "" {
err := secretCredentialManager.updateCredentialsMapFile()
if err != nil {
glog.Warningf("Failed parsing SecretsDirectory %q: %q", secretCredentialManager.SecretsDirectory, err)
}
}
credential, found := secretCredentialManager.Cache.GetCredential(server)
if !found {
glog.Errorf("credentials not found for server %q", server)
return nil, ErrCredentialsNotFound
}
return &credential, nil
}
func (secretCredentialManager *SecretCredentialManager) updateCredentialsMapK8s() error {
secret, err := secretCredentialManager.SecretLister.Secrets(secretCredentialManager.SecretNamespace).Get(secretCredentialManager.SecretName)
if err != nil {
glog.Warningf("Cannot get secret %s in namespace %s. error: %q", secretCredentialManager.SecretName, secretCredentialManager.SecretNamespace, err)
return err
}
cacheSecret := secretCredentialManager.Cache.GetSecret()
if cacheSecret != nil &&
cacheSecret.GetResourceVersion() == secret.GetResourceVersion() {
glog.V(2).Infof("VCP SecretCredentialManager: Secret %q will not be updated in cache. Since, secrets have same resource version %q", secretCredentialManager.SecretName, cacheSecret.GetResourceVersion())
return nil
}
secretCredentialManager.Cache.UpdateSecret(secret)
return secretCredentialManager.Cache.parseSecret()
}
func (secretCredentialManager *SecretCredentialManager) updateCredentialsMapFile() error {
//Secretsdirectory was parsed before, no need to do it again
if secretCredentialManager.SecretsDirectoryParse {
return nil
}
//take the mounted secrets in the form of files and make it looks like we
//parsed it from a k8s secret so we can reuse the SecretCache.parseSecret() func
data := make(map[string][]byte)
files, err := ioutil.ReadDir(secretCredentialManager.SecretsDirectory)
if err != nil {
secretCredentialManager.SecretsDirectoryParse = true
glog.Warningf("Failed to find secrets directory %s. error: %q", secretCredentialManager.SecretsDirectory, err)
return err
}
for _, f := range files {
if f.IsDir() {
glog.Warningf("Skipping parse of directory: %s", f.Name())
continue
}
fullFilePath := secretCredentialManager.SecretsDirectory + "/" + f.Name()
contents, err := ioutil.ReadFile(fullFilePath)
if err != nil {
glog.Warningf("Cannot read file %s. error: %q", fullFilePath, err)
continue
}
data[f.Name()] = contents
}
secretCredentialManager.SecretsDirectoryParse = true
secretCredentialManager.Cache.UpdateSecretFile(data)
return secretCredentialManager.Cache.parseSecret()
}
func (cache *SecretCache) GetSecret() *corev1.Secret {
cache.cacheLock.Lock()
defer cache.cacheLock.Unlock()
return cache.Secret
}
func (cache *SecretCache) UpdateSecret(secret *corev1.Secret) {
cache.cacheLock.Lock()
defer cache.cacheLock.Unlock()
cache.Secret = secret
}
func (cache *SecretCache) UpdateSecretFile(data map[string][]byte) {
cache.cacheLock.Lock()
defer cache.cacheLock.Unlock()
cache.SecretFile = data
}
func (cache *SecretCache) GetCredential(server string) (Credential, bool) {
cache.cacheLock.Lock()
defer cache.cacheLock.Unlock()
credential, found := cache.VirtualCenter[server]
if !found {
return Credential{}, found
}
return *credential, found
}
func (cache *SecretCache) parseSecret() error {
cache.cacheLock.Lock()
defer cache.cacheLock.Unlock()
var data map[string][]byte
if cache.Secret != nil {
glog.V(3).Infof("parseSecret using k8s secret")
data = cache.Secret.Data
} else if cache.SecretFile != nil {
glog.V(3).Infof("parseSecret using secrets directory")
data = cache.SecretFile
}
return parseConfig(data, cache.VirtualCenter)
}
// parseConfig returns vCenter ip/fdqn mapping to its credentials viz. Username and Password.
func parseConfig(data map[string][]byte, config map[string]*Credential) error {
if len(data) == 0 {
return ErrCredentialMissing
}
for credentialKey, credentialValue := range data {
credentialKey = strings.ToLower(credentialKey)
if strings.HasSuffix(credentialKey, "password") {
vcServer := strings.Split(credentialKey, ".password")[0]
if _, ok := config[vcServer]; !ok {
config[vcServer] = &Credential{}
}
config[vcServer].Password = string(credentialValue)
} else if strings.HasSuffix(credentialKey, "username") {
vcServer := strings.Split(credentialKey, ".username")[0]
if _, ok := config[vcServer]; !ok {
config[vcServer] = &Credential{}
}
config[vcServer].User = string(credentialValue)
} else {
glog.Errorf("Unknown secret key %s", credentialKey)
return ErrUnknownSecretKey
}
}
for vcServer, credential := range config {
if credential.User == "" || credential.Password == "" {
glog.Errorf("Username/Password is missing for server %s", vcServer)
return ErrCredentialMissing
}
}
return nil
}