forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 1
/
aggregator.go
228 lines (200 loc) · 10 KB
/
aggregator.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
/*
Copyright 2017 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 app does all of the work necessary to create a Kubernetes
// APIServer by binding together the API, master and APIServer infrastructure.
// It can be configured and called directly or via the hyperkube framework.
package app
import (
"fmt"
"io/ioutil"
"net/http"
"strings"
"github.com/golang/glog"
apiextensionsinformers "k8s.io/apiextensions-apiserver/pkg/client/informers/internalversion"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime/schema"
genericapiserver "k8s.io/apiserver/pkg/server"
"k8s.io/apiserver/pkg/server/healthz"
genericoptions "k8s.io/apiserver/pkg/server/options"
kubeexternalinformers "k8s.io/client-go/informers"
"k8s.io/kube-aggregator/pkg/apis/apiregistration"
"k8s.io/kube-aggregator/pkg/apis/apiregistration/v1beta1"
aggregatorapiserver "k8s.io/kube-aggregator/pkg/apiserver"
apiregistrationclient "k8s.io/kube-aggregator/pkg/client/clientset_generated/internalclientset/typed/apiregistration/internalversion"
"k8s.io/kube-aggregator/pkg/controllers/autoregister"
"k8s.io/kubernetes/cmd/kube-apiserver/app/options"
informers "k8s.io/kubernetes/pkg/client/informers/informers_generated/internalversion"
"k8s.io/kubernetes/pkg/master/thirdparty"
)
func createAggregatorConfig(kubeAPIServerConfig genericapiserver.Config, commandOptions *options.ServerRunOptions, externalInformers kubeexternalinformers.SharedInformerFactory, serviceResolver aggregatorapiserver.ServiceResolver, proxyTransport *http.Transport) (*aggregatorapiserver.Config, error) {
// make a shallow copy to let us twiddle a few things
// most of the config actually remains the same. We only need to mess with a couple items related to the particulars of the aggregator
genericConfig := kubeAPIServerConfig
// the aggregator doesn't wire these up. It just delegates them to the kubeapiserver
genericConfig.EnableSwaggerUI = false
genericConfig.SwaggerConfig = nil
// copy the etcd options so we don't mutate originals.
etcdOptions := *commandOptions.Etcd
etcdOptions.StorageConfig.Codec = aggregatorapiserver.Codecs.LegacyCodec(v1beta1.SchemeGroupVersion)
etcdOptions.StorageConfig.Copier = aggregatorapiserver.Scheme
genericConfig.RESTOptionsGetter = &genericoptions.SimpleRestOptionsFactory{Options: etcdOptions}
var err error
var certBytes, keyBytes []byte
if len(commandOptions.ProxyClientCertFile) > 0 && len(commandOptions.ProxyClientKeyFile) > 0 {
certBytes, err = ioutil.ReadFile(commandOptions.ProxyClientCertFile)
if err != nil {
return nil, err
}
keyBytes, err = ioutil.ReadFile(commandOptions.ProxyClientKeyFile)
if err != nil {
return nil, err
}
}
aggregatorConfig := &aggregatorapiserver.Config{
GenericConfig: &genericConfig,
CoreKubeInformers: externalInformers,
ProxyClientCert: certBytes,
ProxyClientKey: keyBytes,
ServiceResolver: serviceResolver,
ProxyTransport: proxyTransport,
}
return aggregatorConfig, nil
}
func createAggregatorServer(aggregatorConfig *aggregatorapiserver.Config, delegateAPIServer genericapiserver.DelegationTarget, kubeInformers informers.SharedInformerFactory, apiExtensionInformers apiextensionsinformers.SharedInformerFactory) (*aggregatorapiserver.APIAggregator, error) {
aggregatorServer, err := aggregatorConfig.Complete().NewWithDelegate(delegateAPIServer)
if err != nil {
return nil, err
}
// create controllers for auto-registration
apiRegistrationClient, err := apiregistrationclient.NewForConfig(aggregatorConfig.GenericConfig.LoopbackClientConfig)
if err != nil {
return nil, err
}
autoRegistrationController := autoregister.NewAutoRegisterController(aggregatorServer.APIRegistrationInformers.Apiregistration().InternalVersion().APIServices(), apiRegistrationClient)
apiServices := apiServicesToRegister(delegateAPIServer, autoRegistrationController)
tprRegistrationController := thirdparty.NewAutoRegistrationController(
kubeInformers.Extensions().InternalVersion().ThirdPartyResources(),
apiExtensionInformers.Apiextensions().InternalVersion().CustomResourceDefinitions(),
autoRegistrationController)
aggregatorServer.GenericAPIServer.AddPostStartHook("kube-apiserver-autoregistration", func(context genericapiserver.PostStartHookContext) error {
go autoRegistrationController.Run(5, context.StopCh)
go tprRegistrationController.Run(5, context.StopCh)
return nil
})
aggregatorServer.GenericAPIServer.AddHealthzChecks(healthz.NamedCheck("autoregister-completion", func(r *http.Request) error {
items, err := aggregatorServer.APIRegistrationInformers.Apiregistration().InternalVersion().APIServices().Lister().List(labels.Everything())
if err != nil {
return err
}
missing := []apiregistration.APIService{}
for _, apiService := range apiServices {
found := false
for _, item := range items {
if item.Name != apiService.Name {
continue
}
if apiregistration.IsAPIServiceConditionTrue(item, apiregistration.Available) {
found = true
break
}
}
if !found {
missing = append(missing, *apiService)
}
}
if len(missing) > 0 {
return fmt.Errorf("missing APIService: %v", missing)
}
return nil
}))
return aggregatorServer, nil
}
func makeAPIService(gv schema.GroupVersion) *apiregistration.APIService {
apiServicePriority, ok := apiVersionPriorities[gv]
if !ok {
// if we aren't found, then we shouldn't register ourselves because it could result in a CRD group version
// being permanently stuck in the APIServices list.
glog.Infof("Skipping APIService creation for %v", gv)
return nil
}
return &apiregistration.APIService{
ObjectMeta: metav1.ObjectMeta{Name: gv.Version + "." + gv.Group},
Spec: apiregistration.APIServiceSpec{
Group: gv.Group,
Version: gv.Version,
GroupPriorityMinimum: apiServicePriority.group,
VersionPriority: apiServicePriority.version,
},
}
}
type priority struct {
group int32
version int32
}
// The proper way to resolve this letting the aggregator know the desired group and version-within-group order of the underlying servers
// is to refactor the genericapiserver.DelegationTarget to include a list of priorities based on which APIs were installed.
// This requires the APIGroupInfo struct to evolve and include the concept of priorities and to avoid mistakes, the core storage map there needs to be updated.
// That ripples out every bit as far as you'd expect, so for 1.7 we'll include the list here instead of being built up during storage.
var apiVersionPriorities = map[schema.GroupVersion]priority{
{Group: "", Version: "v1"}: {group: 18000, version: 1},
// extensions is above the rest for CLI compatibility, though the level of unqalified resource compatibility we
// can reasonably expect seems questionable.
{Group: "extensions", Version: "v1beta1"}: {group: 17900, version: 1},
// to my knowledge, nothing below here collides
{Group: "apps", Version: "v1beta1"}: {group: 17800, version: 1},
{Group: "authentication.k8s.io", Version: "v1"}: {group: 17700, version: 15},
{Group: "authentication.k8s.io", Version: "v1beta1"}: {group: 17700, version: 9},
{Group: "authorization.k8s.io", Version: "v1"}: {group: 17600, version: 15},
{Group: "authorization.k8s.io", Version: "v1beta1"}: {group: 17600, version: 9},
{Group: "autoscaling", Version: "v1"}: {group: 17500, version: 15},
{Group: "autoscaling", Version: "v2alpha1"}: {group: 17500, version: 9},
{Group: "batch", Version: "v1"}: {group: 17400, version: 15},
{Group: "batch", Version: "v2alpha1"}: {group: 17400, version: 9},
{Group: "certificates.k8s.io", Version: "v1beta1"}: {group: 17300, version: 9},
{Group: "networking.k8s.io", Version: "v1"}: {group: 17200, version: 15},
{Group: "policy", Version: "v1beta1"}: {group: 17100, version: 9},
{Group: "rbac.authorization.k8s.io", Version: "v1beta1"}: {group: 17000, version: 12},
{Group: "rbac.authorization.k8s.io", Version: "v1alpha1"}: {group: 17000, version: 9},
{Group: "settings.k8s.io", Version: "v1alpha1"}: {group: 16900, version: 9},
{Group: "storage.k8s.io", Version: "v1"}: {group: 16800, version: 15},
{Group: "storage.k8s.io", Version: "v1beta1"}: {group: 16800, version: 9},
{Group: "apiextensions.k8s.io", Version: "v1beta1"}: {group: 16700, version: 9},
{Group: "admissionregistration.k8s.io", Version: "v1alpha1"}: {group: 16700, version: 9},
}
func apiServicesToRegister(delegateAPIServer genericapiserver.DelegationTarget, registration autoregister.AutoAPIServiceRegistration) []*apiregistration.APIService {
apiServices := []*apiregistration.APIService{}
for _, curr := range delegateAPIServer.ListedPaths() {
if curr == "/api/v1" {
apiService := makeAPIService(schema.GroupVersion{Group: "", Version: "v1"})
registration.AddAPIServiceToSync(apiService)
apiServices = append(apiServices, apiService)
continue
}
if !strings.HasPrefix(curr, "/apis/") {
continue
}
// this comes back in a list that looks like /apis/rbac.authorization.k8s.io/v1alpha1
tokens := strings.Split(curr, "/")
if len(tokens) != 4 {
continue
}
apiService := makeAPIService(schema.GroupVersion{Group: tokens[2], Version: tokens[3]})
if apiService == nil {
continue
}
registration.AddAPIServiceToSync(apiService)
apiServices = append(apiServices, apiService)
}
return apiServices
}