-
Notifications
You must be signed in to change notification settings - Fork 300
/
kas.go
174 lines (151 loc) · 6.45 KB
/
kas.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
package pki
import (
"fmt"
"net"
corev1 "k8s.io/api/core/v1"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/apiserver/pkg/authentication/serviceaccount"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
hyperv1 "github.com/openshift/hypershift/api/hypershift/v1beta1"
"github.com/openshift/hypershift/control-plane-operator/controllers/hostedcontrolplane/manifests"
"github.com/openshift/hypershift/support/certs"
"github.com/openshift/hypershift/support/config"
"github.com/openshift/hypershift/support/util"
utilsnet "k8s.io/utils/net"
)
const (
// Service signer secret keys
ServiceSignerPrivateKey = "service-account.key"
ServiceSignerPublicKey = "service-account.pub"
)
func ReconcileKASServerCertSecret(secret, ca *corev1.Secret, ownerRef config.OwnerRef, externalAPIAddress, internalAPIAddress string, serviceCIDRs []string, nodeInternalAPIServerIP string) error {
svc := manifests.KubeAPIServerService(secret.Namespace)
svcAddresses := make([]string, 0)
for _, serviceCIDR := range serviceCIDRs {
serviceIP, err := util.FirstUsableIP(serviceCIDR)
if err != nil {
return fmt.Errorf("cannot get the first usable IP from CIDR %s: %w", serviceIP, err)
}
svcAddresses = append(svcAddresses, serviceIP)
}
dnsNames := []string{
"localhost",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster.local",
svc.Name,
fmt.Sprintf("%s.%s.svc", svc.Name, svc.Namespace),
fmt.Sprintf("%s.%s.svc.cluster.local", svc.Name, svc.Namespace),
}
apiServerIPs := []string{
"127.0.0.1",
"0:0:0:0:0:0:0:1",
}
apiServerIPs = append(apiServerIPs, svcAddresses...)
apiServerIPs = append(apiServerIPs, nodeInternalAPIServerIP)
if isNumericIP(externalAPIAddress) {
apiServerIPs = append(apiServerIPs, externalAPIAddress)
} else {
dnsNames = append(dnsNames, externalAPIAddress)
}
if isNumericIP(internalAPIAddress) {
apiServerIPs = append(apiServerIPs, internalAPIAddress)
} else {
dnsNames = append(dnsNames, internalAPIAddress)
}
return reconcileSignedCertWithAddresses(secret, ca, ownerRef, "kubernetes", []string{"kubernetes"}, X509UsageServerAuth, dnsNames, apiServerIPs)
}
func ReconcileKASKubeletClientCertSecret(secret, ca *corev1.Secret, ownerRef config.OwnerRef) error {
return reconcileSignedCert(secret, ca, ownerRef, "system:kube-apiserver", []string{"kubernetes"}, X509UsageClientAuth)
}
func ReconcileKASMachineBootstrapClientCertSecret(secret, ca *corev1.Secret, ownerRef config.OwnerRef) error {
return reconcileSignedCert(secret, ca, ownerRef, "system:serviceaccount:openshift-machine-config-operator:node-bootstrapper", []string{"system:serviceaccounts:openshift-machine-config-operator", "system:serviceaccounts"}, X509UsageClientAuth)
}
func ReconcileKASAggregatorCertSecret(secret, ca *corev1.Secret, ownerRef config.OwnerRef) error {
return reconcileSignedCert(secret, ca, ownerRef, "system:openshift-aggregator", []string{"kubernetes"}, X509UsageClientAuth)
}
func ReconcileKubeSchedulerClientCertSecret(secret, ca *corev1.Secret, ownerRef config.OwnerRef) error {
return reconcileSignedCert(secret, ca, ownerRef, "system:kube-scheduler", []string{"kubernetes"}, X509UsageClientAuth)
}
func ReconcileKubeControllerManagerClientCertSecret(secret, ca *corev1.Secret, ownerRef config.OwnerRef) error {
return reconcileSignedCert(secret, ca, ownerRef, "system:kube-controller-manager", []string{"kubernetes"}, X509UsageClientAuth)
}
func ReconcileSystemAdminClientCertSecret(secret, ca *corev1.Secret, ownerRef config.OwnerRef) error {
return reconcileSignedCert(secret, ca, ownerRef, "system:admin", []string{"system:masters"}, X509UsageClientAuth)
}
func ReconcileServiceAccountKubeconfig(secret, csrSigner *corev1.Secret, ca *corev1.ConfigMap, hcp *hyperv1.HostedControlPlane, serviceAccountNamespace, serviceAccountName string) error {
cn := serviceaccount.MakeUsername(serviceAccountNamespace, serviceAccountName)
if err := reconcileSignedCert(secret, csrSigner, config.OwnerRef{}, cn, serviceaccount.MakeGroupNames(serviceAccountNamespace), X509UsageClientAuth); err != nil {
return fmt.Errorf("failed to reconcile serviceaccount client cert: %w", err)
}
svcURL := inClusterKASURL(hcp.Spec.Platform.Type)
return ReconcileKubeConfig(secret, secret, ca, svcURL, "", manifests.KubeconfigScopeLocal, config.OwnerRef{})
}
func isNumericIP(s string) bool {
return net.ParseIP(s) != nil
}
func ReconcileKubeConfig(secret, cert *corev1.Secret, ca *corev1.ConfigMap, url string, key string, scope manifests.KubeconfigScope, ownerRef config.OwnerRef) error {
ownerRef.ApplyTo(secret)
caPEM := ca.Data[certs.CASignerCertMapKey]
crtBytes, keyBytes := cert.Data[corev1.TLSCertKey], cert.Data[corev1.TLSPrivateKeyKey]
kubeCfgBytes, err := generateKubeConfig(url, crtBytes, keyBytes, []byte(caPEM))
if err != nil {
return fmt.Errorf("failed to generate kubeconfig: %w", err)
}
if secret.Data == nil {
secret.Data = map[string][]byte{}
}
if key == "" {
key = util.KubeconfigKey
}
if secret.Labels == nil {
secret.Labels = map[string]string{}
}
secret.Labels[manifests.KubeconfigScopeLabel] = string(scope)
secret.Data[key] = kubeCfgBytes
return nil
}
func generateKubeConfig(url string, crtBytes, keyBytes, caBytes []byte) ([]byte, error) {
kubeCfg := clientcmdapi.Config{
Kind: "Config",
APIVersion: "v1",
}
kubeCfg.Clusters = map[string]*clientcmdapi.Cluster{
"cluster": {
Server: AddBracketsIfIPv6(url),
CertificateAuthorityData: caBytes,
},
}
kubeCfg.AuthInfos = map[string]*clientcmdapi.AuthInfo{
"admin": {
ClientCertificateData: crtBytes,
ClientKeyData: keyBytes,
},
}
kubeCfg.Contexts = map[string]*clientcmdapi.Context{
"admin": {
Cluster: "cluster",
AuthInfo: "admin",
Namespace: "default",
},
}
kubeCfg.CurrentContext = "admin"
return clientcmd.Write(kubeCfg)
}
func inClusterKASURL(platformType hyperv1.PlatformType) string {
if platformType == hyperv1.IBMCloudPlatform {
return fmt.Sprintf("https://%s:%d", manifests.KubeAPIServerServiceName, config.KASSVCIBMCloudPort)
}
return fmt.Sprintf("https://%s:%d", manifests.KubeAPIServerServiceName, config.KASSVCPort)
}
// AddBracketsIfIPv6 function is needed to build the serverAPI url for every kubeconfig created.
// The function returns a string in 3 ways.
// - Without brackets if it's an URL or an IPv4
// - With brackets if it's a valid IPv6
func AddBracketsIfIPv6(apiAddress string) string {
if utilsnet.IsIPv6String(apiAddress) {
return fmt.Sprintf("[%s]", apiAddress)
}
return apiAddress
}