forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 1
/
discovery.go
146 lines (124 loc) · 5.02 KB
/
discovery.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
/*
Copyright 2016 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 master
import (
"crypto/x509"
"encoding/json"
"fmt"
"time"
kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
kubeadmapiext "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm/v1alpha1"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/apis/extensions"
clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
certutil "k8s.io/kubernetes/pkg/util/cert"
"k8s.io/kubernetes/pkg/util/wait"
)
type kubeDiscovery struct {
Deployment *extensions.Deployment
Secret *api.Secret
}
const (
kubeDiscoveryName = "kube-discovery"
kubeDiscoverySecretName = "clusterinfo"
)
func encodeKubeDiscoverySecretData(cfg *kubeadmapi.MasterConfiguration, caCert *x509.Certificate) map[string][]byte {
var (
data = map[string][]byte{}
endpointList = []string{}
tokenMap = map[string]string{}
)
for _, addr := range cfg.API.AdvertiseAddresses {
endpointList = append(endpointList, fmt.Sprintf("https://%s:%d", addr, cfg.API.BindPort))
}
tokenMap[cfg.Secrets.TokenID] = cfg.Secrets.BearerToken
data["endpoint-list.json"], _ = json.Marshal(endpointList)
data["token-map.json"], _ = json.Marshal(tokenMap)
data["ca.pem"] = certutil.EncodeCertPEM(caCert)
return data
}
func newKubeDiscoveryPodSpec(cfg *kubeadmapi.MasterConfiguration) api.PodSpec {
return api.PodSpec{
// We have to use host network namespace, as `HostPort`/`HostIP` are Docker's
// buisness and CNI support isn't quite there yet (except for kubenet)
// (see https://github.com/kubernetes/kubernetes/issues/31307)
// TODO update this when #31307 is resolved
SecurityContext: &api.PodSecurityContext{HostNetwork: true},
Containers: []api.Container{{
Name: kubeDiscoveryName,
Image: kubeadmapi.GlobalEnvParams.DiscoveryImage,
Command: []string{"/usr/local/bin/kube-discovery"},
VolumeMounts: []api.VolumeMount{{
Name: kubeDiscoverySecretName,
MountPath: "/tmp/secret", // TODO use a shared constant
ReadOnly: true,
}},
Ports: []api.ContainerPort{
// TODO when CNI issue (#31307) is resolved, we should consider adding
// `HostIP: s.API.AdvertiseAddrs[0]`, if there is only one address`
{Name: "http", ContainerPort: kubeadmapiext.DefaultDiscoveryBindPort, HostPort: cfg.Discovery.BindPort},
},
SecurityContext: &api.SecurityContext{
SELinuxOptions: &api.SELinuxOptions{
// TODO: This implies our discovery container is not being restricted by
// SELinux. This is not optimal and would be nice to adjust in future
// so it can read /tmp/secret, but for now this avoids recommending
// setenforce 0 system-wide.
Type: "unconfined_t",
},
},
}},
Volumes: []api.Volume{{
Name: kubeDiscoverySecretName,
VolumeSource: api.VolumeSource{
Secret: &api.SecretVolumeSource{SecretName: kubeDiscoverySecretName},
}},
},
}
}
func newKubeDiscovery(cfg *kubeadmapi.MasterConfiguration, caCert *x509.Certificate) kubeDiscovery {
kd := kubeDiscovery{
Deployment: NewDeployment(kubeDiscoveryName, 1, newKubeDiscoveryPodSpec(cfg)),
Secret: &api.Secret{
ObjectMeta: api.ObjectMeta{Name: kubeDiscoverySecretName},
Type: api.SecretTypeOpaque,
Data: encodeKubeDiscoverySecretData(cfg, caCert),
},
}
SetMasterTaintTolerations(&kd.Deployment.Spec.Template.ObjectMeta)
SetNodeAffinity(&kd.Deployment.Spec.Template.ObjectMeta, MasterNodeAffinity(), NativeArchitectureNodeAffinity())
return kd
}
func CreateDiscoveryDeploymentAndSecret(cfg *kubeadmapi.MasterConfiguration, client *clientset.Clientset, caCert *x509.Certificate) error {
kd := newKubeDiscovery(cfg, caCert)
if _, err := client.Extensions().Deployments(api.NamespaceSystem).Create(kd.Deployment); err != nil {
return fmt.Errorf("<master/discovery> failed to create %q deployment [%v]", kubeDiscoveryName, err)
}
if _, err := client.Secrets(api.NamespaceSystem).Create(kd.Secret); err != nil {
return fmt.Errorf("<master/discovery> failed to create %q secret [%v]", kubeDiscoverySecretName, err)
}
fmt.Println("<master/discovery> created essential addon: kube-discovery, waiting for it to become ready")
start := time.Now()
wait.PollInfinite(apiCallRetryInterval, func() (bool, error) {
d, err := client.Extensions().Deployments(api.NamespaceSystem).Get(kubeDiscoveryName)
if err != nil {
return false, nil
}
if d.Status.AvailableReplicas < 1 {
return false, nil
}
return true, nil
})
fmt.Printf("<master/discovery> kube-discovery is ready after %f seconds\n", time.Since(start).Seconds())
return nil
}