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97 lines
2.8 KiB
97 lines
2.8 KiB
5 years ago
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/*
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package etcd
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import (
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"crypto/tls"
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"crypto/x509"
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"strings"
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"time"
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"github.com/coreos/etcd/clientv3"
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"github.com/minio/minio/cmd/config"
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"github.com/minio/minio/pkg/env"
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xnet "github.com/minio/minio/pkg/net"
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)
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const (
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// Default values used while communicating with etcd.
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defaultDialTimeout = 30 * time.Second
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defaultDialKeepAlive = 30 * time.Second
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)
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// etcd environment values
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const (
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EnvEtcdEndpoints = "MINIO_ETCD_ENDPOINTS"
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EnvEtcdClientCert = "MINIO_ETCD_CLIENT_CERT"
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EnvEtcdClientCertKey = "MINIO_ETCD_CLIENT_CERT_KEY"
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)
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// New - Initialize new etcd client
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func New(rootCAs *x509.CertPool) (*clientv3.Client, error) {
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envEndpoints := env.Get(EnvEtcdEndpoints, "")
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if envEndpoints == "" {
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// etcd is not configured, nothing to do.
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return nil, nil
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}
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etcdEndpoints := strings.Split(envEndpoints, config.ValueSeparator)
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var etcdSecure bool
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for _, endpoint := range etcdEndpoints {
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u, err := xnet.ParseURL(endpoint)
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if err != nil {
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return nil, err
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}
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// If one of the endpoint is https, we will use https directly.
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etcdSecure = etcdSecure || u.Scheme == "https"
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}
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var err error
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var etcdClnt *clientv3.Client
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if etcdSecure {
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// This is only to support client side certificate authentication
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// https://coreos.com/etcd/docs/latest/op-guide/security.html
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etcdClientCertFile, ok1 := env.Lookup(EnvEtcdClientCert)
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etcdClientCertKey, ok2 := env.Lookup(EnvEtcdClientCertKey)
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var getClientCertificate func(*tls.CertificateRequestInfo) (*tls.Certificate, error)
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if ok1 && ok2 {
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getClientCertificate = func(unused *tls.CertificateRequestInfo) (*tls.Certificate, error) {
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cert, terr := tls.LoadX509KeyPair(etcdClientCertFile, etcdClientCertKey)
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return &cert, terr
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}
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}
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etcdClnt, err = clientv3.New(clientv3.Config{
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Endpoints: etcdEndpoints,
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DialTimeout: defaultDialTimeout,
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DialKeepAliveTime: defaultDialKeepAlive,
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TLS: &tls.Config{
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RootCAs: rootCAs,
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GetClientCertificate: getClientCertificate,
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},
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})
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} else {
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etcdClnt, err = clientv3.New(clientv3.Config{
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Endpoints: etcdEndpoints,
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DialTimeout: defaultDialTimeout,
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DialKeepAliveTime: defaultDialKeepAlive,
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})
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}
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return etcdClnt, err
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}
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