forked from gravitational/teleport
-
Notifications
You must be signed in to change notification settings - Fork 0
/
clusterconfig.go
448 lines (366 loc) · 13 KB
/
clusterconfig.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
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
/*
Copyright 2017 Gravitational, Inc.
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 services
import (
"encoding/json"
"fmt"
"strings"
"time"
"github.com/gravitational/teleport/lib/defaults"
"github.com/gravitational/teleport/lib/utils"
"github.com/gravitational/trace"
"github.com/jonboulle/clockwork"
)
// ClusterConfig defines cluster level configuration. This is a configuration
// resource, never create more than one instance of it.
type ClusterConfig interface {
// Resource provides common resource properties.
Resource
// GetSessionRecording gets where the session is being recorded.
GetSessionRecording() string
// SetSessionRecording sets where the session is recorded.
SetSessionRecording(string)
// GetClusterID returns the unique cluster ID
GetClusterID() string
// SetClusterID sets the cluster ID
SetClusterID(string)
// GetProxyChecksHostKeys sets if the proxy will check host keys.
GetProxyChecksHostKeys() string
// SetProxyChecksHostKeys gets if the proxy will check host keys.
SetProxyChecksHostKeys(string)
// CheckAndSetDefaults checks and set default values for missing fields.
CheckAndSetDefaults() error
// GetAuditConfig returns audit settings
GetAuditConfig() AuditConfig
// SetAuditConfig sets audit config
SetAuditConfig(AuditConfig)
// GetClientIdleTimeout returns client idle timeout setting
GetClientIdleTimeout() time.Duration
// SetClientIdleTimeout sets client idle timeout setting
SetClientIdleTimeout(t time.Duration)
// GetDisconnectExpiredCert returns disconnect expired certificate setting
GetDisconnectExpiredCert() bool
// SetDisconnectExpiredCert sets disconnect client with expired certificate setting
SetDisconnectExpiredCert(bool)
// Copy creates a copy of the resource and returns it.
Copy() ClusterConfig
}
// NewClusterConfig is a convenience wrapper to create a ClusterConfig resource.
func NewClusterConfig(spec ClusterConfigSpecV3) (ClusterConfig, error) {
cc := ClusterConfigV3{
Kind: KindClusterConfig,
Version: V3,
Metadata: Metadata{
Name: MetaNameClusterConfig,
Namespace: defaults.Namespace,
},
Spec: spec,
}
if err := cc.CheckAndSetDefaults(); err != nil {
return nil, trace.Wrap(err)
}
return &cc, nil
}
// DefaultClusterConfig is used as the default cluster configuration when
// one is not specified (record at node).
func DefaultClusterConfig() ClusterConfig {
return &ClusterConfigV3{
Kind: KindClusterConfig,
Version: V3,
Metadata: Metadata{
Name: MetaNameClusterConfig,
Namespace: defaults.Namespace,
},
Spec: ClusterConfigSpecV3{
SessionRecording: RecordAtNode,
ProxyChecksHostKeys: HostKeyCheckYes,
},
}
}
// AuditConfig represents audit log settings in the cluster
type AuditConfig struct {
// Type is audit backend type
Type string `json:"type,omitempty"`
// Region is a region setting for audit sessions used by cloud providers
Region string `json:"region,omitempty"`
// AuditSessionsURI is a parameter where to upload sessions
AuditSessionsURI string `json:"audit_sessions_uri,omitempty"`
// AuditEventsURI is a parameter with all supported outputs
// for audit events
AuditEventsURI utils.Strings `json:"audit_events_uri,omitempty"`
// AuditTableName is a DB table name used for audits
// Deprecated in favor of AuditEventsURI
// DELETE IN (3.1.0)
AuditTableName string `json:"audit_table_name,omitempty"`
}
// ShouldUploadSessions returns whether audit config
// instructs server to upload sessions
func (a AuditConfig) ShouldUploadSessions() bool {
return a.AuditSessionsURI != ""
}
// AuditConfigFromObject returns audit config from interface object
func AuditConfigFromObject(in interface{}) (*AuditConfig, error) {
var cfg AuditConfig
if in == nil {
return &cfg, nil
}
if err := utils.ObjectToStruct(in, &cfg); err != nil {
return nil, trace.Wrap(err)
}
return &cfg, nil
}
// ClusterConfigV3 implements the ClusterConfig interface.
type ClusterConfigV3 struct {
// Kind is a resource kind - always resource.
Kind string `json:"kind"`
// Version is a resource version.
Version string `json:"version"`
// Metadata is metadata about the resource.
Metadata Metadata `json:"metadata"`
// Spec is the specification of the resource.
Spec ClusterConfigSpecV3 `json:"spec"`
}
const (
// RecordAtNode is the default. Sessions are recorded at Teleport nodes.
RecordAtNode string = "node"
// RecordAtProxy enables the recording proxy which intercepts and records
// all sessions.
RecordAtProxy string = "proxy"
// RecordOff is used to disable session recording completely.
RecordOff string = "off"
)
const (
// HostKeyCheckYes is the default. The proxy will check the host key of the
// target node it connects to.
HostKeyCheckYes string = "yes"
// HostKeyCheckNo is used to disable host key checking. This is a insecure
// settings which makes MITM possible with no indications, use with caution.
HostKeyCheckNo string = "no"
)
// ClusterConfigSpecV3 is the actual data we care about for ClusterConfig.
type ClusterConfigSpecV3 struct {
// SessionRecording controls where (or if) the session is recorded.
SessionRecording string `json:"session_recording"`
// ClusterID is the unique cluster ID that is set once during the first auth
// server startup.
ClusterID string `json:"cluster_id"`
// ProxyChecksHostKeys is used to control if the proxy will check host keys
// when in recording mode.
ProxyChecksHostKeys string `json:"proxy_checks_host_keys"`
// Audit is a section with audit config
Audit AuditConfig `json:"audit"`
// ClientIdleTimeout sets global cluster default setting for client idle timeouts
ClientIdleTimeout Duration `json:"client_idle_timeout"`
// DisconnectExpiredCert provides disconnect expired certificate setting -
// if true, connections with expired client certificates will get disconnected
DisconnectExpiredCert Bool `json:"disconnect_expired_cert"`
}
// GetName returns the name of the cluster.
func (c *ClusterConfigV3) GetName() string {
return c.Metadata.Name
}
// SetName sets the name of the cluster.
func (c *ClusterConfigV3) SetName(e string) {
c.Metadata.Name = e
}
// Expires retuns object expiry setting
func (c *ClusterConfigV3) Expiry() time.Time {
return c.Metadata.Expiry()
}
// SetExpiry sets expiry time for the object
func (c *ClusterConfigV3) SetExpiry(expires time.Time) {
c.Metadata.SetExpiry(expires)
}
// SetTTL sets Expires header using realtime clock
func (c *ClusterConfigV3) SetTTL(clock clockwork.Clock, ttl time.Duration) {
c.Metadata.SetTTL(clock, ttl)
}
// GetMetadata returns object metadata
func (c *ClusterConfigV3) GetMetadata() Metadata {
return c.Metadata
}
// GetClusterConfig gets the name of the cluster.
func (c *ClusterConfigV3) GetSessionRecording() string {
return c.Spec.SessionRecording
}
// SetClusterConfig sets the name of the cluster.
func (c *ClusterConfigV3) SetSessionRecording(s string) {
c.Spec.SessionRecording = s
}
// GetClusterID returns the unique cluster ID
func (c *ClusterConfigV3) GetClusterID() string {
return c.Spec.ClusterID
}
// SetClusterID sets the cluster ID
func (c *ClusterConfigV3) SetClusterID(id string) {
c.Spec.ClusterID = id
}
// GetProxyChecksHostKeys sets if the proxy will check host keys.
func (c *ClusterConfigV3) GetProxyChecksHostKeys() string {
return c.Spec.ProxyChecksHostKeys
}
// SetProxyChecksHostKeys sets if the proxy will check host keys.
func (c *ClusterConfigV3) SetProxyChecksHostKeys(t string) {
c.Spec.ProxyChecksHostKeys = t
}
// GetAuditConfig returns audit settings
func (c *ClusterConfigV3) GetAuditConfig() AuditConfig {
return c.Spec.Audit
}
// SetAuditConfig sets audit config
func (c *ClusterConfigV3) SetAuditConfig(cfg AuditConfig) {
c.Spec.Audit = cfg
}
// GetClientIdleTimeout returns client idle timeout setting
func (c *ClusterConfigV3) GetClientIdleTimeout() time.Duration {
return c.Spec.ClientIdleTimeout.Duration
}
// SetClientIdleTimeout sets client idle timeout setting
func (c *ClusterConfigV3) SetClientIdleTimeout(d time.Duration) {
c.Spec.ClientIdleTimeout.Duration = d
}
// GetDisconnectExpiredCert returns disconnect expired certificate setting
func (c *ClusterConfigV3) GetDisconnectExpiredCert() bool {
return c.Spec.DisconnectExpiredCert.bool
}
// SetDisconnectExpiredCert sets disconnect client with expired certificate setting
func (c *ClusterConfigV3) SetDisconnectExpiredCert(b bool) {
c.Spec.DisconnectExpiredCert.bool = b
}
// CheckAndSetDefaults checks validity of all parameters and sets defaults.
func (c *ClusterConfigV3) CheckAndSetDefaults() error {
// make sure we have defaults for all metadata fields
err := c.Metadata.CheckAndSetDefaults()
if err != nil {
return trace.Wrap(err)
}
if c.Spec.SessionRecording == "" {
c.Spec.SessionRecording = RecordAtNode
}
if c.Spec.ProxyChecksHostKeys == "" {
c.Spec.ProxyChecksHostKeys = HostKeyCheckYes
}
// check if the recording type is valid
all := []string{RecordAtNode, RecordAtProxy, RecordOff}
ok := utils.SliceContainsStr(all, c.Spec.SessionRecording)
if !ok {
return trace.BadParameter("session_recording must either be: %v", strings.Join(all, ","))
}
// check if host key checking mode is valid
all = []string{HostKeyCheckYes, HostKeyCheckNo}
ok = utils.SliceContainsStr(all, c.Spec.ProxyChecksHostKeys)
if !ok {
return trace.BadParameter("proxy_checks_host_keys must be one of: %v", strings.Join(all, ","))
}
return nil
}
// Copy creates a copy of the resource and returns it.
func (c *ClusterConfigV3) Copy() ClusterConfig {
out := *c
return &out
}
// String represents a human readable version of the cluster name.
func (c *ClusterConfigV3) String() string {
return fmt.Sprintf("ClusterConfig(SessionRecording=%v, ClusterID=%v, ProxyChecksHostKeys=%v)",
c.Spec.SessionRecording, c.Spec.ClusterID, c.Spec.ProxyChecksHostKeys)
}
// ClusterConfigSpecSchemaTemplate is a template for ClusterConfig schema.
const ClusterConfigSpecSchemaTemplate = `{
"type": "object",
"additionalProperties": false,
"properties": {
"session_recording": {
"type": "string"
},
"proxy_checks_host_keys": {
"type": "string"
},
"cluster_id": {
"type": "string"
},
"audit": {
"type": "object",
"additionalProperties": false,
"properties": {
"type": {
"type": "string"
},
"region": {
"type": "string"
},
"audit_sessions_uri": {
"type": "string"
},
"audit_table_name": {
"type": "string"
}
}
}%v
}
}`
// GetClusterConfigSchema returns the schema with optionally injected
// schema for extensions.
func GetClusterConfigSchema(extensionSchema string) string {
var clusterConfigSchema string
if clusterConfigSchema == "" {
clusterConfigSchema = fmt.Sprintf(ClusterConfigSpecSchemaTemplate, "")
} else {
clusterConfigSchema = fmt.Sprintf(ClusterConfigSpecSchemaTemplate, ","+extensionSchema)
}
return fmt.Sprintf(V2SchemaTemplate, MetadataSchema, clusterConfigSchema, DefaultDefinitions)
}
// ClusterConfigMarshaler implements marshal/unmarshal of ClusterConfig implementations
// mostly adds support for extended versions.
type ClusterConfigMarshaler interface {
Marshal(c ClusterConfig, opts ...MarshalOption) ([]byte, error)
Unmarshal(bytes []byte) (ClusterConfig, error)
}
var clusterConfigMarshaler ClusterConfigMarshaler = &TeleportClusterConfigMarshaler{}
// SetClusterConfigMarshaler sets the marshaler.
func SetClusterConfigMarshaler(m ClusterConfigMarshaler) {
marshalerMutex.Lock()
defer marshalerMutex.Unlock()
clusterConfigMarshaler = m
}
// GetClusterConfigMarshaler gets the marshaler.
func GetClusterConfigMarshaler() ClusterConfigMarshaler {
marshalerMutex.Lock()
defer marshalerMutex.Unlock()
return clusterConfigMarshaler
}
// TeleportClusterConfigMarshaler is used to marshal and unmarshal ClusterConfig.
type TeleportClusterConfigMarshaler struct{}
// Unmarshal unmarshals ClusterConfig from JSON.
func (t *TeleportClusterConfigMarshaler) Unmarshal(bytes []byte) (ClusterConfig, error) {
var clusterConfig ClusterConfigV3
if len(bytes) == 0 {
return nil, trace.BadParameter("missing resource data")
}
err := utils.UnmarshalWithSchema(GetClusterConfigSchema(""), &clusterConfig, bytes)
if err != nil {
return nil, trace.BadParameter(err.Error())
}
err = clusterConfig.CheckAndSetDefaults()
if err != nil {
return nil, trace.Wrap(err)
}
return &clusterConfig, nil
}
// Marshal marshals ClusterConfig to JSON.
func (t *TeleportClusterConfigMarshaler) Marshal(c ClusterConfig, opts ...MarshalOption) ([]byte, error) {
b, err := json.Marshal(c)
if err != nil {
return nil, trace.Wrap(err)
}
return b, nil
}