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Copy pathconfig.go
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234 lines (210 loc) · 6.93 KB
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// Copyright 2016 The etcd Authors
//
// 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 (
"encoding/hex"
"fmt"
"net/url"
"os"
"path/filepath"
"strings"
"time"
"github.com/eolinker/eosc/env"
"github.com/eolinker/eosc/log"
"github.com/google/uuid"
bolt "go.etcd.io/bbolt"
"go.etcd.io/etcd/client/pkg/v3/transport"
"go.etcd.io/etcd/client/pkg/v3/types"
"go.etcd.io/etcd/server/v3/config"
"go.etcd.io/etcd/server/v3/etcdserver"
"go.etcd.io/etcd/server/v3/etcdserver/api/v3compactor"
"go.etcd.io/etcd/server/v3/wal"
"go.uber.org/zap"
"golang.org/x/crypto/bcrypt"
)
const (
DefaultMaxSnapshots = 5
DefaultMaxWALs = 5
DefaultWarningApplyDuration = 100 * time.Millisecond
DefaultDowngradeCheckTime = 5 * time.Second
DefaultStrictReconfigCheck = true
// DefaultEnableV2 is the default value for "--enable-v2" flag.
// v2 API is disabled by default.
DefaultEnableV2 = false
)
type Config struct {
PeerAdvertiseUrls []string
ClientAdvertiseUrls []string
GatewayAdvertiseUrls []string
DataDir string
}
func (c *Config) CreatePeerUrl() (types.URLs, types.URLs, error) {
peerUrl, err := parseAndCheckURLs(c.PeerAdvertiseUrls)
if err != nil {
return nil, nil, err
}
clientUrl, err := parseAndCheckURLs(c.ClientAdvertiseUrls)
if err != nil {
return nil, nil, err
}
return peerUrl, clientUrl, nil
}
func (s *_Server) etcdServerConfig() config.ServerConfig {
dataDir := s.config.DataDir
peerUrl, clientUrl, err := s.config.CreatePeerUrl()
if err != nil {
log.Fatal(err)
}
name, InitialCluster, isNew := s.readCluster(peerUrl)
_ = os.Setenv("node_id", name)
var urlsmap types.URLsMap
var token string
if !wal.Exist(filepath.Join(dataDir, "member", "wal")) {
token = "APINTO_CLUSTER"
}
urlsmap, _ = types.NewURLsMap(InitialCluster)
srvCfg := config.ServerConfig{
ClientURLs: clientUrl,
PeerURLs: peerUrl,
DataDir: dataDir,
DedicatedWALDir: "",
MaxWALFiles: DefaultMaxWALs,
InitialPeerURLsMap: urlsmap,
InitialClusterToken: token,
NewCluster: isNew,
AutoCompactionRetention: time.Duration(10),
AutoCompactionMode: v3compactor.ModeRevision,
QuotaBackendBytes: quotaBackendBytes,
BackendFreelistType: bolt.FreelistMapType,
MaxTxnOps: maxTxnOps,
MaxRequestBytes: maxRequestBytes,
SocketOpts: transport.SocketOpts{},
Logger: zap.New(NewLogger()),
DowngradeCheckTime: DefaultDowngradeCheckTime,
WarningApplyDuration: DefaultWarningApplyDuration,
MaxSnapFiles: DefaultMaxSnapshots,
Name: name,
SnapshotCount: etcdserver.DefaultSnapshotCount,
SnapshotCatchUpEntries: etcdserver.DefaultSnapshotCatchUpEntries,
TickMs: 100,
ElectionTicks: 10,
InitialElectionTickAdvance: true,
StrictReconfigCheck: DefaultStrictReconfigCheck,
EnableGRPCGateway: true,
CORS: map[string]struct{}{"*": {}},
HostWhitelist: map[string]struct{}{"*": {}},
AuthToken: "simple",
BcryptCost: uint(bcrypt.DefaultCost),
TokenTTL: 300,
PreVote: true,
ExperimentalMemoryMlock: false,
ExperimentalTxnModeWriteWithSharedBuffer: true,
V2Deprecation: config.V2_DEPR_DEFAULT,
}
return srvCfg
}
// parseAndCheckURLs parses list of strings to url.URL objects.
func parseAndCheckURLs(urlStrings []string) ([]url.URL, error) {
urls := make([]url.URL, len(urlStrings))
for i, urlString := range urlStrings {
parsedURL, err := url.Parse(urlString)
if err != nil {
return nil, fmt.Errorf(" %s: %v", urlString, err)
}
urls[i] = *parsedURL
}
return urls, nil
}
func initialClusterString(clusters map[string][]string) string {
ss := make([]string, 0)
for name, urls := range clusters {
for _, u := range urls {
ss = append(ss, fmt.Sprintf("%s=%s", name, u))
}
}
return strings.Join(ss, ",")
}
func readClusterString(clusters string) map[string][]string {
its := strings.Split(clusters, ",")
vs := make(map[string][]string)
for _, it := range its {
f := strings.Split(it, "=")
if len(f) != 2 {
continue
}
vs[f[0]] = append(vs[f[0]], f[1])
}
return vs
}
func (s *_Server) resetCluster(InitialCluster string) {
etcdInitPath := filepath.Join(s.config.DataDir, "cluster", "etcd.init")
etcdConfig := env.NewConfig(etcdInitPath)
etcdConfig.ReadFile(etcdInitPath)
defer func() {
err := etcdConfig.Save()
if err != nil {
log.Warn("write args file fail:", err)
return
}
log.Info("write args file succeed!")
}()
etcdConfig.Set("cluster", InitialCluster)
}
func (s *_Server) clearCluster() {
s.resetCluster("")
}
func (s *_Server) readCluster(peerUrl types.URLs) (name, InitialCluster string, isNew bool) {
etcdInitPath := filepath.Join(s.config.DataDir, "cluster", "etcd.init")
etcdConfig := env.NewConfig(etcdInitPath)
etcdConfig.ReadFile(etcdInitPath)
defer func() {
err := etcdConfig.Save()
if err != nil {
log.Warn("write args file fail:", err)
return
}
log.Info("write args file succeed!")
}()
var has bool
name, has = etcdConfig.Get("name")
if !has {
nodeId, has := env.GetEnv("NODE_ID")
if !has || nodeId == "" {
name = createUUID()
} else {
name = nodeId
}
etcdConfig.Set("name", name)
}
InitialCluster, has = etcdConfig.Get("cluster")
if !has || InitialCluster == "" {
isNew = true
members := map[string][]string{
name: peerUrl.StringSlice(),
}
InitialCluster = initialClusterString(members)
} else {
members := readClusterString(InitialCluster)
members[name] = peerUrl.StringSlice()
InitialCluster = initialClusterString(members)
}
etcdConfig.Set("cluster", InitialCluster)
return name, InitialCluster, isNew
}
func createUUID() string {
u := uuid.New()
bs := make([]byte, 32)
hex.Encode(bs, u[:])
return string(bs)
}