/
client.go
111 lines (89 loc) · 2.65 KB
/
client.go
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// Copyright 2019 Shanghai JingDuo Information Technology co., Ltd.
//
// 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 etcd
import (
"crypto/tls"
"crypto/x509"
"encoding/pem"
"fmt"
"github.com/coreos/etcd/clientv3"
pb "github.com/kpaas-io/kpaas/pkg/deploy/protos"
)
func newCertPool(caCrt *x509.Certificate) (*x509.CertPool, error) {
certPool := x509.NewCertPool()
_, pemByte, err := ToByte(caCrt, nil)
if err != nil {
return nil, err
}
for {
var block *pem.Block
block, pemByte = pem.Decode(pemByte)
if block == nil {
break
}
cert, err := x509.ParseCertificate(block.Bytes)
if err != nil {
return nil, err
}
certPool.AddCert(cert)
}
return certPool, nil
}
func newCert(d *deployEtcdOperation) (*tls.Certificate, error) {
tlsCert, err := tls.X509KeyPair(d.encodedPeerCert, d.encodedPeerKey)
if err != nil {
return nil, fmt.Errorf("failed to parse certificate for etcd client:%v, error: %v", d.machine.GetName(), err)
}
return &tlsCert, nil
}
func getClientV3TLS(d *deployEtcdOperation) (*tls.Config, error) {
var err error
cfg := &tls.Config{
MinVersion: tls.VersionTLS12,
ServerName: d.machine.GetName(),
}
cfg.GetCertificate = func(clientHello *tls.ClientHelloInfo) (*tls.Certificate, error) {
return newCert(d)
}
cfg.GetClientCertificate = func(unused *tls.CertificateRequestInfo) (*tls.Certificate, error) {
return newCert(d)
}
cfg.RootCAs, err = newCertPool(d.caCrt)
if err != nil {
return nil, fmt.Errorf("failed to get cert pool for etcd client:%v, error:%v", d.machine.GetName(), err)
}
return cfg, nil
}
func composeEndpoints(nodes []*pb.Node) (endpoints []string) {
for i := range nodes {
endpoints = append(endpoints, fmt.Sprintf("https://%v:%v", nodes[i].Ip, defaultEtcdServerPort))
}
return
}
func newEtcdV3SecureClient(d *deployEtcdOperation) (*clientv3.Client, error) {
tlsCfg, err := getClientV3TLS(d)
if err != nil {
return nil, err
}
// check etcd cluster health
cli, err := clientv3.New(clientv3.Config{
Endpoints: composeEndpoints(d.clusterNodes),
DialTimeout: defaultEtcdDialTimeout,
TLS: tlsCfg,
})
if err != nil {
return nil, err
}
return cli, nil
}