/
pki.go
240 lines (210 loc) · 7.13 KB
/
pki.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
/*
Copyright 2019 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 model
import (
"fmt"
"strings"
"k8s.io/kops/pkg/rbac"
"k8s.io/kops/pkg/tokens"
"k8s.io/kops/upup/pkg/fi"
"k8s.io/kops/upup/pkg/fi/fitasks"
"k8s.io/kops/util/pkg/vfs"
)
// PKIModelBuilder configures PKI keypairs, as well as tokens
type PKIModelBuilder struct {
*KopsModelContext
Lifecycle *fi.Lifecycle
}
var _ fi.ModelBuilder = &PKIModelBuilder{}
// Build is responsible for generating the various pki assets.
func (b *PKIModelBuilder) Build(c *fi.ModelBuilderContext) error {
// TODO: Only create the CA via this task
defaultCA := &fitasks.Keypair{
Name: fi.String(fi.CertificateIDCA),
Lifecycle: b.Lifecycle,
Subject: "cn=kubernetes",
Type: "ca",
}
c.AddTask(defaultCA)
{
// @check if kops-controller bootstrap or bootstrap tokens are enabled. If so, disable the creation of the kubelet certificate - we also
// block at the IAM level for AWS cluster for pre-existing clusters.
if !b.UseKopsControllerForNodeBootstrap() && !b.UseBootstrapTokens() {
c.AddTask(&fitasks.Keypair{
Name: fi.String("kubelet"),
Lifecycle: b.Lifecycle,
Subject: "o=" + rbac.NodesGroup + ",cn=kubelet",
Type: "client",
Signer: defaultCA,
})
}
}
if !b.UseKopsControllerForNodeBootstrap() {
t := &fitasks.Keypair{
Name: fi.String("kube-proxy"),
Lifecycle: b.Lifecycle,
Subject: "cn=" + rbac.KubeProxy,
Type: "client",
Signer: defaultCA,
}
c.AddTask(t)
}
if b.UseEtcdManager() {
// We generate keypairs in the etcdmanager task itself
} else if b.UseEtcdTLS() {
// check if we need to generate certificates for etcd peers certificates from a different CA?
// @question i think we should use another KeyStore for this, perhaps registering a EtcdKeyStore given
// that mutual tls used to verify between the peers we don't want certificates for kubernetes able to act as a peer.
// For clients assuming we are using etcdv3 is can switch on user authentication and map the common names for auth.
servingNames := []string{fmt.Sprintf("*.internal.%s", b.ClusterName()), "localhost", "127.0.0.1"}
// @question should wildcard's be here instead of generating per node. If we ever provide the
// ability to resize the master, this will become a blocker
c.AddTask(&fitasks.Keypair{
AlternateNames: servingNames,
Lifecycle: b.Lifecycle,
Name: fi.String("etcd"),
Subject: "cn=etcd",
// TODO: Can this be "server" now that we're not using it for peer connectivity?
Type: "clientServer",
Signer: defaultCA,
})
// For peer authentication, the same cert is used both as a client
// cert and as a server cert (which is unusual). Moreover, etcd
// 3.2 introduces some breaking changes to certificate validation
// where it tries to match any IP or DNS names to the client IP
// (including reverse DNS lookups!) We _could_ include a wildcard
// reverse DNS name e.g. *.ec2.internal for EC2, but it seems
// better just to list the names that we expect peer connectivity
// to happen on.
var peerNames []string
for _, etcdCluster := range b.Cluster.Spec.EtcdClusters {
prefix := "etcd-" + etcdCluster.Name + "-"
if prefix == "etcd-main-" {
prefix = "etcd-"
}
for _, m := range etcdCluster.Members {
peerNames = append(peerNames, prefix+m.Name+".internal."+b.ClusterName())
}
}
c.AddTask(&fitasks.Keypair{
AlternateNames: peerNames,
Lifecycle: b.Lifecycle,
Name: fi.String("etcd-peer"),
Subject: "cn=etcd-peer",
Type: "clientServer",
Signer: defaultCA,
})
c.AddTask(&fitasks.Keypair{
Name: fi.String("etcd-client"),
Lifecycle: b.Lifecycle,
Subject: "cn=etcd-client",
Type: "client",
Signer: defaultCA,
})
// @check if calico is enabled as the CNI provider
if b.KopsModelContext.Cluster.Spec.Networking.Calico != nil {
c.AddTask(&fitasks.Keypair{
Name: fi.String("calico-client"),
Lifecycle: b.Lifecycle,
Subject: "cn=calico-client",
Type: "client",
Signer: defaultCA,
})
}
}
if b.KopsModelContext.Cluster.Spec.Networking.Kuberouter != nil && !b.UseKopsControllerForNodeBootstrap() {
t := &fitasks.Keypair{
Name: fi.String("kube-router"),
Subject: "cn=" + rbac.KubeRouter,
Type: "client",
Signer: defaultCA,
}
c.AddTask(t)
}
{
aggregatorCA := &fitasks.Keypair{
Name: fi.String("apiserver-aggregator-ca"),
Lifecycle: b.Lifecycle,
Subject: "cn=apiserver-aggregator-ca",
Type: "ca",
}
c.AddTask(aggregatorCA)
}
{
serviceAccount := &fitasks.Keypair{
// We only need the private key, but it's easier to create a certificate as well.
// The strange name is because Kops prior to 1.19 used the api-server TLS key for this.
Name: fi.String("master"),
Lifecycle: b.Lifecycle,
Subject: "cn=service-account",
Type: "ca",
}
c.AddTask(serviceAccount)
}
// @TODO this is VERY presumptuous, i'm going on the basis we can make it configurable in the future.
// But I'm conscious not to do too much work on bootstrap tokens as it might overlay further down the
// line with the machines api
if b.UseBootstrapTokens() {
serviceName := "node-authorizer-internal"
alternateNames := []string{
"127.0.0.1",
"localhost",
serviceName,
strings.Join([]string{serviceName, b.Cluster.Name}, "."),
strings.Join([]string{serviceName, b.Cluster.Spec.DNSZone}, "."),
}
// @note: the certificate used by the node authorizers
c.AddTask(&fitasks.Keypair{
Name: fi.String("node-authorizer"),
Subject: "cn=node-authorizaer",
Type: "server",
AlternateNames: alternateNames,
Signer: defaultCA,
})
// @note: we use this for mutual tls between node and authorizer
c.AddTask(&fitasks.Keypair{
Name: fi.String("node-authorizer-client"),
Subject: "cn=node-authorizer-client",
Type: "client",
Signer: defaultCA,
})
}
// Create auth tokens (though this is deprecated)
for _, x := range tokens.GetKubernetesAuthTokens_Deprecated() {
c.AddTask(&fitasks.Secret{Name: fi.String(x), Lifecycle: b.Lifecycle})
}
{
mirrorPath, err := vfs.Context.BuildVfsPath(b.Cluster.Spec.SecretStore)
if err != nil {
return err
}
t := &fitasks.MirrorSecrets{
Name: fi.String("mirror-secrets"),
MirrorPath: mirrorPath,
}
c.AddTask(t)
}
{
mirrorPath, err := vfs.Context.BuildVfsPath(b.Cluster.Spec.KeyStore)
if err != nil {
return err
}
// Keypair used by the kubelet
t := &fitasks.MirrorKeystore{
Name: fi.String("mirror-keystore"),
MirrorPath: mirrorPath,
}
c.AddTask(t)
}
return nil
}