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services.go
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services.go
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package pki
import (
"context"
"crypto/rsa"
"fmt"
"reflect"
"github.com/rancher/rke/hosts"
"github.com/rancher/rke/log"
"github.com/rancher/types/apis/management.cattle.io/v3"
"k8s.io/client-go/util/cert"
)
func GenerateKubeAPICertificate(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
// generate API certificate and key
caCrt := certs[CACertName].Certificate
caKey := certs[CACertName].Key
kubernetesServiceIP, err := GetKubernetesServiceIP(rkeConfig.Services.KubeAPI.ServiceClusterIPRange)
if err != nil {
return fmt.Errorf("Failed to get Kubernetes Service IP: %v", err)
}
clusterDomain := rkeConfig.Services.Kubelet.ClusterDomain
cpHosts := hosts.NodesToHosts(rkeConfig.Nodes, controlRole)
kubeAPIAltNames := GetAltNames(cpHosts, clusterDomain, kubernetesServiceIP, rkeConfig.Authentication.SANs)
kubeAPICert := certs[KubeAPICertName].Certificate
if kubeAPICert != nil &&
reflect.DeepEqual(kubeAPIAltNames.DNSNames, kubeAPICert.DNSNames) &&
deepEqualIPsAltNames(kubeAPIAltNames.IPs, kubeAPICert.IPAddresses) {
return nil
}
log.Infof(ctx, "[certificates] Generating Kubernetes API server certificates")
kubeAPICrt, kubeAPIKey, err := GenerateSignedCertAndKey(caCrt, caKey, true, KubeAPICertName, kubeAPIAltNames, certs[KubeAPICertName].Key, nil)
if err != nil {
return err
}
certs[KubeAPICertName] = ToCertObject(KubeAPICertName, "", "", kubeAPICrt, kubeAPIKey)
// handle service account tokens in old clusters
apiCert := certs[KubeAPICertName]
if certs[ServiceAccountTokenKeyName].Key == nil {
log.Infof(ctx, "[certificates] Generating Service account token key")
certs[ServiceAccountTokenKeyName] = ToCertObject(ServiceAccountTokenKeyName, ServiceAccountTokenKeyName, "", apiCert.Certificate, apiCert.Key)
}
return nil
}
func GenerateKubeControllerCertificate(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
// generate Kube controller-manager certificate and key
log.Infof(ctx, "[certificates] Generating Kube Controller certificates")
caCrt := certs[CACertName].Certificate
caKey := certs[CACertName].Key
kubeControllerCrt, kubeControllerKey, err := GenerateSignedCertAndKey(caCrt, caKey, false, getDefaultCN(KubeControllerCertName), nil, nil, nil)
if err != nil {
return err
}
certs[KubeControllerCertName] = ToCertObject(KubeControllerCertName, "", "", kubeControllerCrt, kubeControllerKey)
return nil
}
func GenerateKubeSchedulerCertificate(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
// generate Kube scheduler certificate and key
log.Infof(ctx, "[certificates] Generating Kube Scheduler certificates")
caCrt := certs[CACertName].Certificate
caKey := certs[CACertName].Key
kubeSchedulerCrt, kubeSchedulerKey, err := GenerateSignedCertAndKey(caCrt, caKey, false, getDefaultCN(KubeSchedulerCertName), nil, nil, nil)
if err != nil {
return err
}
certs[KubeSchedulerCertName] = ToCertObject(KubeSchedulerCertName, "", "", kubeSchedulerCrt, kubeSchedulerKey)
return nil
}
func GenerateKubeProxyCertificate(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
// generate Kube Proxy certificate and key
log.Infof(ctx, "[certificates] Generating Kube Proxy certificates")
caCrt := certs[CACertName].Certificate
caKey := certs[CACertName].Key
kubeProxyCrt, kubeProxyKey, err := GenerateSignedCertAndKey(caCrt, caKey, false, getDefaultCN(KubeProxyCertName), nil, nil, nil)
if err != nil {
return err
}
certs[KubeProxyCertName] = ToCertObject(KubeProxyCertName, "", "", kubeProxyCrt, kubeProxyKey)
return nil
}
func GenerateKubeNodeCertificate(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
// generate kubelet certificate
log.Infof(ctx, "[certificates] Generating Node certificate")
caCrt := certs[CACertName].Certificate
caKey := certs[CACertName].Key
nodeCrt, nodeKey, err := GenerateSignedCertAndKey(caCrt, caKey, false, KubeNodeCommonName, nil, nil, []string{KubeNodeOrganizationName})
if err != nil {
return err
}
certs[KubeNodeCertName] = ToCertObject(KubeNodeCertName, KubeNodeCommonName, KubeNodeOrganizationName, nodeCrt, nodeKey)
return nil
}
func GenerateKubeAdminCertificate(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
// generate Admin certificate and key
log.Infof(ctx, "[certificates] Generating admin certificates and kubeconfig")
caCrt := certs[CACertName].Certificate
caKey := certs[CACertName].Key
cpHosts := hosts.NodesToHosts(rkeConfig.Nodes, controlRole)
if len(configPath) == 0 {
configPath = ClusterConfig
}
localKubeConfigPath := GetLocalKubeConfig(configPath, configDir)
kubeAdminCrt, kubeAdminKey, err := GenerateSignedCertAndKey(caCrt, caKey, false, KubeAdminCertName, nil, nil, []string{KubeAdminOrganizationName})
if err != nil {
return err
}
kubeAdminCertObj := ToCertObject(KubeAdminCertName, KubeAdminCertName, KubeAdminOrganizationName, kubeAdminCrt, kubeAdminKey)
if len(cpHosts) > 0 {
kubeAdminConfig := GetKubeConfigX509WithData(
"https://"+cpHosts[0].Address+":6443",
rkeConfig.ClusterName,
KubeAdminCertName,
string(cert.EncodeCertPEM(caCrt)),
string(cert.EncodeCertPEM(kubeAdminCrt)),
string(cert.EncodePrivateKeyPEM(kubeAdminKey)))
kubeAdminCertObj.Config = kubeAdminConfig
kubeAdminCertObj.ConfigPath = localKubeConfigPath
} else {
kubeAdminCertObj.Config = ""
}
certs[KubeAdminCertName] = kubeAdminCertObj
return nil
}
func GenerateAPIProxyClientCertificate(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
//generate API server proxy client key and certs
log.Infof(ctx, "[certificates] Generating Kubernetes API server proxy client certificates")
caCrt := certs[RequestHeaderCACertName].Certificate
caKey := certs[RequestHeaderCACertName].Key
apiserverProxyClientCrt, apiserverProxyClientKey, err := GenerateSignedCertAndKey(caCrt, caKey, true, APIProxyClientCertName, nil, nil, nil)
if err != nil {
return err
}
certs[APIProxyClientCertName] = ToCertObject(APIProxyClientCertName, "", "", apiserverProxyClientCrt, apiserverProxyClientKey)
return nil
}
func GenerateExternalEtcdCertificates(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
clientCert, err := cert.ParseCertsPEM([]byte(rkeConfig.Services.Etcd.Cert))
if err != nil {
return err
}
clientKey, err := cert.ParsePrivateKeyPEM([]byte(rkeConfig.Services.Etcd.Key))
if err != nil {
return err
}
certs[EtcdClientCertName] = ToCertObject(EtcdClientCertName, "", "", clientCert[0], clientKey.(*rsa.PrivateKey))
caCert, err := cert.ParseCertsPEM([]byte(rkeConfig.Services.Etcd.CACert))
if err != nil {
return err
}
certs[EtcdClientCACertName] = ToCertObject(EtcdClientCACertName, "", "", caCert[0], nil)
return nil
}
func GenerateEtcdCertificates(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
caCrt := certs[CACertName].Certificate
caKey := certs[CACertName].Key
kubernetesServiceIP, err := GetKubernetesServiceIP(rkeConfig.Services.KubeAPI.ServiceClusterIPRange)
if err != nil {
return fmt.Errorf("Failed to get Kubernetes Service IP: %v", err)
}
clusterDomain := rkeConfig.Services.Kubelet.ClusterDomain
etcdHosts := hosts.NodesToHosts(rkeConfig.Nodes, etcdRole)
etcdAltNames := GetAltNames(etcdHosts, clusterDomain, kubernetesServiceIP, []string{})
for _, host := range etcdHosts {
etcdName := GetEtcdCrtName(host.InternalAddress)
if _, ok := certs[etcdName]; ok && !rotate {
continue
}
log.Infof(ctx, "[certificates] Generating etcd-%s certificate and key", host.InternalAddress)
etcdCrt, etcdKey, err := GenerateSignedCertAndKey(caCrt, caKey, true, EtcdCertName, etcdAltNames, nil, nil)
if err != nil {
return err
}
certs[etcdName] = ToCertObject(etcdName, "", "", etcdCrt, etcdKey)
}
return nil
}
func GenerateServiceTokenKey(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
// generate service account token key
var privateAPIKey *rsa.PrivateKey
caCrt := certs[CACertName].Certificate
caKey := certs[CACertName].Key
// handle rotation on old clusters
if certs[ServiceAccountTokenKeyName].Key == nil {
privateAPIKey = certs[KubeAPICertName].Key
}
tokenCrt, tokenKey, err := GenerateSignedCertAndKey(caCrt, caKey, false, ServiceAccountTokenKeyName, nil, privateAPIKey, nil)
if err != nil {
return fmt.Errorf("Failed to generate private key for service account token: %v", err)
}
certs[ServiceAccountTokenKeyName] = ToCertObject(ServiceAccountTokenKeyName, ServiceAccountTokenKeyName, "", tokenCrt, tokenKey)
return nil
}
func GenerateRKECACerts(ctx context.Context, certs map[string]CertificatePKI, configPath, configDir string) error {
// generate kubernetes CA certificate and key
log.Infof(ctx, "[certificates] Generating CA kubernetes certificates")
caCrt, caKey, err := GenerateCACertAndKey(CACertName, certs[CACertName].Key)
if err != nil {
return err
}
certs[CACertName] = ToCertObject(CACertName, "", "", caCrt, caKey)
// generate request header client CA certificate and key
log.Infof(ctx, "[certificates] Generating Kubernetes API server aggregation layer requestheader client CA certificates")
requestHeaderCACrt, requestHeaderCAKey, err := GenerateCACertAndKey(RequestHeaderCACertName, nil)
if err != nil {
return err
}
certs[RequestHeaderCACertName] = ToCertObject(RequestHeaderCACertName, "", "", requestHeaderCACrt, requestHeaderCAKey)
return nil
}
func GenerateRKEServicesCerts(ctx context.Context, certs map[string]CertificatePKI, rkeConfig v3.RancherKubernetesEngineConfig, configPath, configDir string, rotate bool) error {
RKECerts := []GenFunc{
GenerateKubeAPICertificate,
GenerateServiceTokenKey,
GenerateKubeControllerCertificate,
GenerateKubeSchedulerCertificate,
GenerateKubeProxyCertificate,
GenerateKubeNodeCertificate,
GenerateKubeAdminCertificate,
GenerateAPIProxyClientCertificate,
GenerateEtcdCertificates,
}
for _, gen := range RKECerts {
if err := gen(ctx, certs, rkeConfig, configPath, configDir, rotate); err != nil {
return err
}
}
if len(rkeConfig.Services.Etcd.ExternalURLs) > 0 {
return GenerateExternalEtcdCertificates(ctx, certs, rkeConfig, configPath, configDir, false)
}
return nil
}