https://github.com/etcd-io/etcd
Tip revision: d42e8589e1305d893eeec9e7db746f6f4a76c250 authored by Sam Batschelet on 03 October 2021, 15:47:37 UTC
version: 3.5.1
version: 3.5.1
Tip revision: d42e858
etcd.go
// Copyright 2018 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 main
import (
"context"
"fmt"
"io/ioutil"
"net/url"
"os"
"strings"
"time"
clientv3 "go.etcd.io/etcd/client/v3"
"go.etcd.io/etcd/server/v3/embed"
"go.uber.org/zap"
)
func newEmbedURLs(n int) (urls []url.URL) {
urls = make([]url.URL, n)
for i := 0; i < n; i++ {
u, _ := url.Parse(fmt.Sprintf("unix://localhost:%d%06d", os.Getpid(), i))
urls[i] = *u
}
return urls
}
func setupEmbedCfg(cfg *embed.Config, curls, purls, ics []url.URL) {
cfg.Logger = "zap"
cfg.LogOutputs = []string{"/dev/null"}
// []string{"stderr"} to enable server logging
var err error
cfg.Dir, err = ioutil.TempDir(os.TempDir(), fmt.Sprintf("%016X", time.Now().UnixNano()))
if err != nil {
panic(err)
}
os.RemoveAll(cfg.Dir)
cfg.ClusterState = "new"
cfg.LCUrls, cfg.ACUrls = curls, curls
cfg.LPUrls, cfg.APUrls = purls, purls
cfg.InitialCluster = ""
for i := range ics {
cfg.InitialCluster += fmt.Sprintf(",%d=%s", i, ics[i].String())
}
cfg.InitialCluster = cfg.InitialCluster[1:]
}
func getCommand(exec, name, dir, cURL, pURL, cluster string) (args []string) {
if !strings.Contains(exec, "etcd") {
panic(fmt.Errorf("%q doesn't seem like etcd binary", exec))
}
return []string{
exec,
"--name", name,
"--data-dir", dir,
"--listen-client-urls", cURL,
"--advertise-client-urls", cURL,
"--listen-peer-urls", pURL,
"--initial-advertise-peer-urls", pURL,
"--initial-cluster", cluster,
"--initial-cluster-token=tkn",
"--initial-cluster-state=new",
}
}
func write(ep string) {
cli, err := clientv3.New(clientv3.Config{Endpoints: []string{strings.Replace(ep, "/metrics", "", 1)}})
if err != nil {
lg.Panic("failed to create client", zap.Error(err))
}
defer cli.Close()
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
_, err = cli.Put(ctx, "____test", "")
if err != nil {
lg.Panic("failed to write test key", zap.Error(err))
}
_, err = cli.Get(ctx, "____test")
if err != nil {
lg.Panic("failed to read test key", zap.Error(err))
}
_, err = cli.Delete(ctx, "____test")
if err != nil {
lg.Panic("failed to delete test key", zap.Error(err))
}
cli.Watch(ctx, "____test", clientv3.WithCreatedNotify())
}