-
Notifications
You must be signed in to change notification settings - Fork 15
/
vault_init.go
314 lines (272 loc) · 6.26 KB
/
vault_init.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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
package cmd
import (
"bufio"
"context"
"fmt"
"io/ioutil"
"os"
"path"
"github.com/cybozu-go/cke"
"github.com/cybozu-go/well"
vault "github.com/hashicorp/vault/api"
"github.com/howeyc/gopass"
"github.com/spf13/cobra"
)
const (
ttl100Year = "876000h"
ttl10Year = "87600h"
)
type caParams struct {
commonName string
key string
}
var (
cas = []caParams{
{
commonName: "server CA",
key: cke.CAServer,
},
{
commonName: "etcd peer CA",
key: cke.CAEtcdPeer,
},
{
commonName: "etcd client CA",
key: cke.CAEtcdClient,
},
{
commonName: "kubernetes CA",
key: cke.CAKubernetes,
},
{
commonName: "kubernetes aggregation CA",
key: cke.CAKubernetesAggregation,
},
{
commonName: "kubernetes webhook CA",
key: cke.CAWebhook,
},
}
ckePolicy = `
path "cke/*"
{
capabilities = ["create", "read", "update", "delete", "list", "sudo"]
}`
)
func connectVault(ctx context.Context) (*vault.Client, error) {
cfg := vault.DefaultConfig()
if len(vaultInitCfg.endpoint) > 0 {
cfg.Address = vaultInitCfg.endpoint
}
if len(vaultInitCfg.caCertFile) > 0 {
tlsCfg := &vault.TLSConfig{
CACert: vaultInitCfg.caCertFile,
}
err := cfg.ConfigureTLS(tlsCfg)
if err != nil {
return nil, err
}
}
vc, err := vault.NewClient(cfg)
if err != nil {
return nil, err
}
if vc.Token() != "" {
return vc, nil
}
reader := bufio.NewReader(os.Stdin)
fmt.Print("Vault username: ")
username, err := reader.ReadString('\n')
if err != nil {
return nil, err
}
username = username[0 : len(username)-1]
pass, err := gopass.GetPasswdPrompt("Vault password: ", false, os.Stdin, os.Stdout)
if err != nil {
return nil, err
}
password := string(pass)
secret, err := vc.Logical().Write("/auth/userpass/login/"+username,
map[string]interface{}{"password": password})
if err != nil {
return nil, err
}
vc.SetToken(secret.Auth.ClientToken)
return vc, nil
}
func initVault(ctx context.Context) error {
vc, err := connectVault(ctx)
if err != nil {
return err
}
for _, ca := range cas {
err = createPKI(ctx, vc, ca)
if err != nil {
return err
}
}
err = createKV(ctx, vc)
if err != nil {
return err
}
err = vc.Sys().PutPolicy("cke", ckePolicy)
if err != nil {
return err
}
cfg, err := storage.GetVaultConfig(ctx)
switch err {
case nil:
case cke.ErrNotFound:
_, err = vc.Logical().Write("auth/approle/role/cke", map[string]interface{}{
"policies": "cke",
"period": "1h",
})
if err != nil {
return err
}
secret, err := vc.Logical().Read("auth/approle/role/cke/role-id")
if err != nil {
return err
}
roleID := secret.Data["role_id"].(string)
secret, err = vc.Logical().Write("auth/approle/role/cke/secret-id", map[string]interface{}{})
if err != nil {
return err
}
secretID := secret.Data["secret_id"].(string)
cfg = new(cke.VaultConfig)
cfg.Endpoint = vc.Address()
cfg.RoleID = roleID
cfg.SecretID = secretID
if len(vaultInitCfg.caCertFile) > 0 {
data, err := ioutil.ReadFile(vaultInitCfg.caCertFile)
if err != nil {
return err
}
cfg.CACert = string(data)
}
err = storage.PutVaultConfig(ctx, cfg)
if err != nil {
return err
}
default:
return err
}
vc2, _, err := cke.VaultClient(cfg)
if err != nil {
return err
}
for _, ca := range cas {
err = createRootCA(ctx, vc2, ca)
if err != nil {
return err
}
}
secret, err := vc2.Logical().Read(cke.K8sSecret)
if err != nil {
return err
}
if secret != nil && secret.Data != nil {
return nil
}
return rotateK8sEncryptionKey(vc2)
}
func createPKI(ctx context.Context, vc *vault.Client, ca caParams) error {
mounts, err := vc.Sys().ListMounts()
if err != nil {
return err
}
pkiKey := cke.VaultPKIKey(ca.key)
if _, ok := mounts[pkiKey]; ok {
return nil
}
if _, ok := mounts[pkiKey+"/"]; ok {
return nil
}
err = vc.Sys().Mount(pkiKey, &vault.MountInput{
Type: "pki",
Config: vault.MountConfigInput{
MaxLeaseTTL: ttl100Year,
DefaultLeaseTTL: ttl10Year,
},
})
if err != nil {
return err
}
fmt.Printf("mounted pki on %s\n", pkiKey)
return nil
}
func createRootCA(ctx context.Context, vc *vault.Client, ca caParams) error {
_, err := storage.GetCACertificate(ctx, ca.key)
if err == nil {
return nil
}
if err != cke.ErrNotFound {
return err
}
pkiKey := cke.VaultPKIKey(ca.key)
secret, err := vc.Logical().Write(path.Join(pkiKey, "/root/generate/internal"), map[string]interface{}{
"common_name": ca.commonName,
"ttl": ttl100Year,
"format": "pem",
})
if err != nil {
return err
}
_, ok := secret.Data["certificate"]
if !ok {
return fmt.Errorf("failed to issue ca: %#v", secret.Warnings)
}
fmt.Printf("issued root certificate for %s\n", pkiKey)
return storage.PutCACertificate(ctx, ca.key, secret.Data["certificate"].(string))
}
func createKV(ctx context.Context, vc *vault.Client) error {
mounts, err := vc.Sys().ListMounts()
if err != nil {
return err
}
if _, ok := mounts[cke.CKESecret]; ok {
return nil
}
if _, ok := mounts[cke.CKESecret+"/"]; ok {
return nil
}
kv1 := &vault.MountInput{
Type: "kv",
Options: map[string]string{"version": "1"},
}
err = vc.Sys().Mount(cke.CKESecret, kv1)
if err != nil {
return err
}
fmt.Printf("mounted kv version 1 on %s\n", cke.CKESecret)
return nil
}
var vaultInitCfg struct {
caCertFile string
endpoint string
}
// vaultInitCmd represents the "vault init" command
var vaultInitCmd = &cobra.Command{
Use: "init",
Short: "configure Vault for CKE",
Long: `Configure HashiCorp Vault for CKE.
Vault will be configured to:
* have "cke" policy that can use secrets under cke/.
* have "ca-server", "ca-etcd-peer", "ca-etcd-client", "ca-kubernetes"
PKI secrets under cke/.
* creates AppRole for CKE.
* have initial encryption key for Kubernetes Secrets.
This command will ask username and password for Vault authentication
when VAULT_TOKEN environment variable is not set.`,
RunE: func(cmd *cobra.Command, args []string) error {
well.Go(initVault)
well.Stop()
return well.Wait()
},
}
func init() {
vaultInitCmd.Flags().StringVar(&vaultInitCfg.caCertFile, "cacert", "", "x509 CA certificate file")
vaultInitCmd.Flags().StringVar(&vaultInitCfg.endpoint, "endpoint", "", "Vault URL")
vaultCmd.AddCommand(vaultInitCmd)
}