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options.go
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options.go
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// Copyright 2023 Linka Cloud All rights reserved.
//
// 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 replication
import (
"crypto/tls"
"crypto/x509"
"errors"
"time"
"github.com/shaj13/raft"
)
type Option func(o *Options)
type Options struct {
Mode Mode
Name string
Addrs []string
GRPCPort int
Tick time.Duration
GossipPort int
EncryptionKey string
StartOptions []raft.StartOption
serverCert []byte
serverKey []byte
clientCert []byte
clientKey []byte
clientCA []byte
tlsConfig *tls.Config
}
func WithMode(mode Mode) Option {
return func(o *Options) {
o.Mode = mode
}
}
func WithName(name string) Option {
return func(o *Options) {
o.Name = name
}
}
func WithAddrs(addrs ...string) Option {
return func(o *Options) {
o.Addrs = addrs
}
}
func WithGossipPort(port int) Option {
return func(o *Options) {
o.GossipPort = port
}
}
func WithGRPCPort(port int) Option {
return func(o *Options) {
o.GRPCPort = port
}
}
func WithTick(ms int) Option {
return func(o *Options) {
if ms > 100 {
o.Tick = time.Duration(ms) * time.Millisecond
}
}
}
func WithRaftStartOptions(opts ...raft.StartOption) Option {
return func(o *Options) {
o.StartOptions = append(o.StartOptions, opts...)
}
}
func WithServerCert(cert []byte) Option {
return func(o *Options) {
o.serverCert = cert
}
}
func WithServerKey(key []byte) Option {
return func(o *Options) {
o.serverKey = key
}
}
func WithClientCert(cert []byte) Option {
return func(o *Options) {
o.clientCert = cert
}
}
func WithClientKey(key []byte) Option {
return func(o *Options) {
o.clientKey = key
}
}
func WithClientCA(ca []byte) Option {
return func(o *Options) {
o.clientCA = ca
}
}
func WithTLSConfig(config *tls.Config) Option {
return func(o *Options) {
o.tlsConfig = config
}
}
func WithEncryptionKey(key string) Option {
return func(o *Options) {
o.EncryptionKey = key
}
}
func (o *Options) TLS() (*tls.Config, error) {
if o.tlsConfig != nil {
return o.tlsConfig, nil
}
if o.serverKey == nil && o.serverCert == nil {
return nil, nil
}
if o.serverKey == nil {
return nil, errors.New("missing server key")
}
if o.serverCert == nil {
return nil, errors.New("missing server certificate")
}
cert, err := tls.X509KeyPair(o.serverCert, o.serverKey)
if err != nil {
return nil, err
}
var (
clientCA *x509.CertPool
clientCert tls.Certificate
auth tls.ClientAuthType
)
if o.clientCA != nil {
clientCA = x509.NewCertPool()
clientCA.AppendCertsFromPEM(o.clientCA)
auth = tls.RequireAndVerifyClientCert
}
if o.clientCert != nil && o.clientKey != nil {
clientCert, err = tls.X509KeyPair(o.clientCert, o.clientKey)
if err != nil {
return nil, err
}
}
// TODO(adphi): client certs
return &tls.Config{
Certificates: []tls.Certificate{cert, clientCert},
ClientCAs: clientCA,
ClientAuth: auth,
}, nil
}