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109 lines
2.9 KiB
109 lines
2.9 KiB
// Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
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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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// http://www.apache.org/licenses/LICENSE-2.0
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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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package main
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import (
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"net"
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"net/http"
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"net/rpc"
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"os"
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"os/signal"
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"strconv"
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"time"
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"github.com/namsral/flag"
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"github.com/topicai/candy"
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"github.com/PaddlePaddle/Paddle/go/pserver"
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log "github.com/inconshreveable/log15"
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)
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func main() {
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port := flag.Int("port", 8001, "port of the pserver")
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index := flag.Int("index", -1, "index of the pserver, set to -1 if use etcd for auto pserver index registry")
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etcdEndpoint := flag.String("etcd-endpoint", "http://127.0.0.1:2379",
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"comma separated endpoint string for pserver to connect to etcd")
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dialTimeout := flag.Duration("dial-timeout", 5*time.Second, "dial timeout")
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etcdTTL := flag.Int("etcd-ttl", 5, "etcd time to live in seconds")
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numPservers := flag.Int("num-pservers", 1, "total pserver count in a training job")
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checkpointPath := flag.String("checkpoint-path", "/checkpoints/", "save checkpoint path")
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checkpointInterval := flag.Duration("checkpoint-interval", 600*time.Second, "save checkpoint per interval seconds")
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logLevel := flag.String("log-level", "info",
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"log level, possible values: debug, info, warn, error, crit")
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flag.Parse()
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lvl, err := log.LvlFromString(*logLevel)
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if err != nil {
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panic(err)
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}
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log.Root().SetHandler(
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log.LvlFilterHandler(lvl, log.CallerStackHandler("%+v", log.StderrHandler)),
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)
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var idx int
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var cp pserver.Checkpoint
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var e *pserver.EtcdClient
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if *index >= 0 {
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idx = *index
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} else {
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e = pserver.NewEtcdClient(*etcdEndpoint, *numPservers, *dialTimeout, *etcdTTL)
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idx, err = e.Register(*port)
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candy.Must(err)
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cp, err = pserver.LoadCheckpoint(e, idx)
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if err != nil {
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if err == pserver.ErrCheckpointNotFound {
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log.Info("load checkpoint error", "error", err)
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} else {
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panic(err)
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}
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}
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}
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shutdown := func() {
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log.Info("shutting down gracefully")
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sErr := e.Shutdown()
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if sErr != nil {
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log.Error("error shutting down", log.Ctx{"error": sErr})
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}
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}
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// Guaranteed to run even panic happens.
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defer shutdown()
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c := make(chan os.Signal, 1)
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signal.Notify(c, os.Interrupt)
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s, err := pserver.NewService(idx, *checkpointInterval, *checkpointPath, e, cp)
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candy.Must(err)
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err = rpc.Register(s)
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candy.Must(err)
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rpc.HandleHTTP()
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l, err := net.Listen("tcp", ":"+strconv.Itoa(*port))
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candy.Must(err)
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go func() {
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log.Info("serving pserver", log.Ctx{"port": *port})
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err = http.Serve(l, nil)
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candy.Must(err)
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}()
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<-c
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}
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