zookeeper集群搭建

分类：Zookeeper作者：编程之家用户

文章目录

zookeeper集群搭建

一、环境

  • 三台主机
hostnameip
zk01192.168.80.10
zk02192.168.80.11
zk03192.168.80.12

二、搭建zookeeper集群

2.1 准备java环境

            Linux配置JDK环境

2.2 下载解压zookeeper

wget --no-check-certificate https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/stable/apache-zookeeper-3.6.3-bin.tar.gz
tar zxvf zookeeper-3.6.3-bin.tar.gz
mv apache-zookeeper-3.6.3-bin zookeeper-3.6
mv zookeeper-3.6 /usr/local/
cd /usr/local/zookeeper-3.6/

2.3 创建数据目录和日志目录

cd /usr/local/zookeeper-3.6/
mkdir data
mkdir logs

2.4 更改配置文件

cd conf/
cp zoo_sample.cfg zoo.cfg

vim zoo.cfg
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/usr/local/zookeeper-3.6/data
dataLogDir=/usr/local/zookeeper-3.6/logs
# the port at which the clients will connect
clientPortAdress=192.168.80.10
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1

## Metrics Providers
#
# https://prometheus.io Metrics Exporter
#metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider
#metricsProvider.httpPort=7000
#metricsProvider.exportJvmInfo=true
server.0=192.168.80.10:2888:3888
server.1=192.168.80.11:2888:3888
server.2=192.168.80.12:2888:3888

配置说明：clientPortAdress=主机ip
server.0 其中0是myid

2.5 输入myid

cd /usr/local/zookeeper-3.6/
echo "0" > data/myid               //0要和配置文件里面的0对应起来
							       //zk02输入命令就是   echo "1" > data/myid   zk03同理

2.6 配置zookeeper环境变量

vim /etc/profile
//末尾添加
export ZOOKEEPER_HOME=/usr/local/zookeeper-3.6
export PATH=$ZOOKEEPER_HOME/bin:$PATH

source /etc/profile

三、启动zookeeper集群

3.1 常用命令

zkServer.sh start
zkServer.sh stop
zkServer.sh start-foreground
zkServer.sh status

3.2 日志

日志在 /usr/local/zookeeper-3.6/logs/ 目录下

3.3 启动

zkServer.sh start
zkServer.sh status

zkServer.sh status 可以查看主机状态：follower或者leader

3.4 测试

可以关闭一台leader主机，然后zookeeper会从剩余的两台follower中选举一台主机位leader。

zkServer.sh stop

3.5 详细日志

2021-10-20 18:35:00,872 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):Follower@143] - Disconnected from leader (with address: /192.168.80.11:2888). Was connected for 2347196ms. Sync state: true
2021-10-20 18:35:00,872 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):Follower@292] - shutdown Follower
2021-10-20 18:35:00,872 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ZooKeeperServer@811] - shutting down
2021-10-20 18:35:00,872 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):RequestThrottler@244] - Shutting down
2021-10-20 18:35:00,875 [myid:2] - INFO  [RequestThrottler:RequestThrottler@205] - Draining request throttler queue
2021-10-20 18:35:00,875 [myid:2] - INFO  [RequestThrottler:RequestThrottler@181] - RequestThrottler shutdown. Dropped 0 requests
2021-10-20 18:35:00,876 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@389] - Notification: my state:FOLLOWING; n.sid:0, n.state:LOOKING, n.leader:0, n.round:0x4, n.peerEpoch:0x3, n.zxid:0x100000000, message format version:0x2, n.config version:0x0
2021-10-20 18:35:00,877 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@389] - Notification: my state:FOLLOWING; n.sid:0, n.state:LOOKING, n.leader:0, n.round:0x4, n.peerEpoch:0x3, n.zxid:0x100000000, message format version:0x2, n.config version:0x0
2021-10-20 18:35:00,878 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@389] - Notification: my state:FOLLOWING; n.sid:0, n.state:LOOKING, n.leader:0, n.round:0x4, n.peerEpoch:0x3, n.zxid:0x100000000, message format version:0x2, n.config version:0x0
2021-10-20 18:35:00,879 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@389] - Notification: my state:FOLLOWING; n.sid:0, n.state:LOOKING, n.leader:0, n.round:0x4, n.peerEpoch:0x3, n.zxid:0x100000000, message format version:0x2, n.config version:0x0
2021-10-20 18:35:00,880 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@389] - Notification: my state:FOLLOWING; n.sid:0, n.state:LOOKING, n.leader:0, n.round:0x4, n.peerEpoch:0x3, n.zxid:0x100000000, message format version:0x2, n.config version:0x0
2021-10-20 18:35:00,899 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):FollowerRequestProcessor@148] - Shutting down
2021-10-20 18:35:00,899 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):CommitProcessor@617] - Shutting down
2021-10-20 18:35:00,899 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):FinalRequestProcessor@661] - shutdown of request processor complete
2021-10-20 18:35:00,900 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):QuorumPeer@864] - Peer state changed: looking
2021-10-20 18:35:00,900 [myid:2] - WARN  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):QuorumPeer@1513] - PeerState set to LOOKING
2021-10-20 18:35:00,900 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):QuorumPeer@1383] - LOOKING
2021-10-20 18:35:00,900 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):FastLeaderElection@944] - New election. My id = 2, proposed zxid=0x300000000
2021-10-20 18:35:00,901 [myid:2] - INFO  [FollowerRequestProcessor:2:FollowerRequestProcessor@112] - FollowerRequestProcessor exited loop!
2021-10-20 18:35:00,901 [myid:2] - INFO  [CommitProcessor:2:CommitProcessor@406] - CommitProcessor exited loop!
2021-10-20 18:35:00,908 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@389] - Notification: my state:LOOKING; n.sid:2, n.state:LOOKING, n.leader:2, n.round:0x4, n.peerEpoch:0x3, n.zxid:0x300000000, message format version:0x2, n.config version:0x0
2021-10-20 18:35:00,908 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@389] - Notification: my state:LOOKING; n.sid:0, n.state:LOOKING, n.leader:2, n.round:0x4, n.peerEpoch:0x3, n.zxid:0x300000000, message format version:0x2, n.config version:0x0
2021-10-20 18:35:01,109 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):QuorumPeer@858] - Peer state changed: leading
2021-10-20 18:35:01,110 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):QuorumPeer@1477] - LEADING
2021-10-20 18:35:01,113 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):LearnerMaster@47] - zookeeper.leader.maxConcurrentSnapSyncs = 10
2021-10-20 18:35:01,114 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):LearnerMaster@50] - zookeeper.leader.maxConcurrentDiffSyncs = 100
2021-10-20 18:35:01,114 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):Leader@84] - TCP NoDelay set to: true
2021-10-20 18:35:01,114 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):Leader@105] - zookeeper.leader.ackLoggingFrequency = 1000
2021-10-20 18:35:01,114 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):Leader@1354] - zookeeper.leader.maxTimeToWaitForEpoch = -1ms
2021-10-20 18:35:01,115 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ZooKeeperServer@1273] - minSessionTimeout set to 4000
2021-10-20 18:35:01,116 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ZooKeeperServer@1282] - maxSessionTimeout set to 40000
2021-10-20 18:35:01,116 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ResponseCache@45] - Response cache size is initialized with value 400.
2021-10-20 18:35:01,116 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ResponseCache@45] - Response cache size is initialized with value 400.
2021-10-20 18:35:01,116 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):RequestPathMetricsCollector@109] - zookeeper.pathStats.slotCapacity = 60
2021-10-20 18:35:01,116 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):RequestPathMetricsCollector@110] - zookeeper.pathStats.slotDuration = 15
2021-10-20 18:35:01,116 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):RequestPathMetricsCollector@111] - zookeeper.pathStats.maxDepth = 6
2021-10-20 18:35:01,116 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):RequestPathMetricsCollector@112] - zookeeper.pathStats.initialDelay = 5
2021-10-20 18:35:01,116 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):RequestPathMetricsCollector@113] - zookeeper.pathStats.delay = 5
2021-10-20 18:35:01,116 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):RequestPathMetricsCollector@114] - zookeeper.pathStats.enabled = false
2021-10-20 18:35:01,117 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ZooKeeperServer@1498] - The max bytes for all large requests are set to 104857600
2021-10-20 18:35:01,117 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ZooKeeperServer@1512] - The large request threshold is set to -1
2021-10-20 18:35:01,117 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ZooKeeperServer@339] - Created server with tickTime 2000 minSessionTimeout 4000 maxSessionTimeout 40000 clientPortListenBacklog -1 datadir /usr/local/zookeeper-3.6/logs/version-2 snapdir /usr/local/zookeeper-3.6/data/version-2
2021-10-20 18:35:01,123 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):Leader@581] - LEADING - LEADER ELECTION TOOK - 223 MS
2021-10-20 18:35:01,125 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):QuorumPeer@864] - Peer state changed: leading - discovery
2021-10-20 18:35:01,126 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):FileTxnSnapLog@470] - Snapshotting: 0x300000000 to /usr/local/zookeeper-3.6/data/version-2/snapshot.300000000
2021-10-20 18:35:01,126 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ZooKeeperServer@529] - Snapshot taken in 1 ms
2021-10-20 18:35:01,222 [myid:2] - INFO  [LearnerHandler-/192.168.80.10:53406:LearnerHandler@504] - Follower sid: 0 : info : 192.168.80.10:2888:3888:participant
2021-10-20 18:35:01,240 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):QuorumPeer@1820] - Dynamic reconfig is disabled, we don't store the last seen config.
2021-10-20 18:35:01,949 [myid:2] - INFO  [LearnerHandler-/192.168.80.10:53406:ZKDatabase@345] - On disk txn sync enabled with snapshotSizeFactor 0.33
2021-10-20 18:35:01,949 [myid:2] - INFO  [LearnerHandler-/192.168.80.10:53406:LearnerHandler@807] - Synchronizing with Learner sid: 0 maxCommittedLog=0x0 minCommittedLog=0x0 lastProcessedZxid=0x300000000 peerLastZxid=0x100000000
2021-10-20 18:35:01,951 [myid:2] - INFO  [LearnerHandler-/192.168.80.10:53406:LearnerHandler@566] - Sending snapshot last zxid of peer is 0x100000000, zxid of leader is 0x400000000, send zxid of db as 0x300000000, 1 concurrent snapshot sync, snapshot sync was exempt from throttle
2021-10-20 18:35:01,954 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):QuorumPeer@864] - Peer state changed: leading - synchronization
2021-10-20 18:35:01,957 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):Leader@1504] - Have quorum of supporters, sids: [[0, 2]]; starting up and setting last processed zxid: 0x400000000
2021-10-20 18:35:01,957 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):Leader@1526] - Dynamic reconfig feature is disabled, skip designatedLeader calculation and reconfig processing.
2021-10-20 18:35:01,959 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):CommitProcessor@476] - Configuring CommitProcessor with readBatchSize -1 commitBatchSize 1
2021-10-20 18:35:01,959 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):CommitProcessor@438] - Configuring CommitProcessor with 1 worker threads.
2021-10-20 18:35:01,963 [myid:2] - INFO  [ProcessThread(sid:2 cport:-1)::PrepRequestProcessor@136] - PrepRequestProcessor (sid:2) started, reconfigEnabled=false
2021-10-20 18:35:01,963 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):ContainerManager@83] - Using checkIntervalMs=60000 maxPerMinute=10000 maxNeverUsedIntervalMs=0
2021-10-20 18:35:01,965 [myid:2] - INFO  [QuorumPeer[myid=2](plain=[0:0:0:0:0:0:0:0]:2181)(secure=disabled):QuorumPeer@864] - Peer state changed: leading - broadcast
2021-10-20 18:35:02,124 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@389] - Notification: my state:LEADING; n.sid:1, n.state:LEADING, n.leader:1, n.round:0x3, n.peerEpoch:0x3, n.zxid:0x100000000, message format version:0x2, n.config version:0x0
2021-10-20 18:35:03,122 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@389] - Notification: my state:LEADING; n.sid:1, n.state:LOOKING, n.leader:1, n.round:0x4, n.peerEpoch:0x3, n.zxid:0x300000000, message format version:0x2, n.config version:0x0
2021-10-20 18:35:03,139 [myid:2] - INFO  [LearnerHandler-/192.168.80.11:55826:LearnerHandler@504] - Follower sid: 1 : info : 192.168.80.11:2888:3888:participant
2021-10-20 18:35:03,144 [myid:2] - INFO  [LearnerHandler-/192.168.80.11:55826:ZKDatabase@345] - On disk txn sync enabled with snapshotSizeFactor 0.33
2021-10-20 18:35:03,144 [myid:2] - INFO  [LearnerHandler-/192.168.80.11:55826:LearnerHandler@807] - Synchronizing with Learner sid: 1 maxCommittedLog=0x0 minCommittedLog=0x0 lastProcessedZxid=0x400000000 peerLastZxid=0x300000000
2021-10-20 18:35:03,145 [myid:2] - INFO  [LearnerHandler-/192.168.80.11:55826:LearnerHandler@566] - Sending snapshot last zxid of peer is 0x300000000, zxid of leader is 0x400000000, send zxid of db as 0x400000000, 1 concurrent snapshot sync, snapshot sync was exempt from throttle
2021-10-20 19:19:13,698 [myid:2] - INFO  [NIOWorkerThread-2:NIOServerCnxn@507] - Processing srvr command from /127.0.0.1:34368

原文地址：https://blog.csdn.net/qq_46480020/article/details/120872764

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由于只有一台电脑，所以搭建一个伪集群（伪集群就是在一台电脑上模拟搭建集群，走不同端口启动，真实的情况在每台机器上搭建一个zookeeper或者每台机器两个zookeeper等），道理是一样的，只不过要注意别被防火墙或者安全组规则挡住了zookeeper节点间的通信，每个节点直接的网络要是通的。集群数
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常用命令总结（linux运行.sh结尾的脚本，window运行.cmd结尾的脚本，一下均为linux运行的，直接将.sh改为.cmd即可）：linux环境：1.启动ZK服务:bin/zkServer.shstart2.查看ZK服务状态:bin/zkServer.shstatus3.停止ZK服务:bin/zkServer.shstop4.重启ZK服务:bin/zkServer.shrest
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###正文ZooKeeper很流行，有个基本的疑问：*ZooKeeper是用来做什么的？*之前没有ZK，为什么会诞生ZK？OK，解答一下上面的疑问：（下面是凭直觉说的）*ZooKeeper是用于简化分布式应用开发的，对开发者屏蔽一些分布式应用开发过程中的底层细节*ZooKeeper对外暴露简单的API，用于支持分
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#一、什么是ZooKeeper**ZooKeeper是一个分布式服务协调框架**，提供了分布式数据一致性的解决方案，基于ZooKeeper的**数据结构，Watcher，选举机制**等特点，可以**实现数据的发布/订阅，软负载均衡，命名服务，统一配置管理，分布式锁，集群管理**等等。#二、为什么使用ZooKeeperZooKeeper能保证：*
zookeeper篇-zoo.cfg配置
点赞再看，养成习惯，微信搜索「小大白日志」关注这个搬砖人。文章不定期同步公众号，还有各种一线大厂面试原题、我的学习系列笔记。zoo.cfg即/usr/local/java/zookeeper/conf下的zoo_sample.cfgzoo.cfg内含参数：tickTime、initLimit、syncLimit、dataDir、dataLogDir、clientPort
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正文ZooKeeper很流行，有个基本的疑问：ZooKeeper是用来做什么的？之前没有ZK，为什么会诞生ZK？OK，解答一下上面的疑问：（下面是凭直觉说的）ZooKeeper是用于简化分布式应用开发的，对开发者屏蔽一些分布式应用开发过程中的底层细节ZooKeeper对外暴露简单的API，用于支持分布式应用开
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#**NO1：说说zookeeper是什么？**ZooKeeper是一个分布式的，开放源码的分布式应用程序协调服务，是Google的Chubby一个开源的实现（Chubby是不开源的），它是集群的管理者，监视着集群中各个节点的状态根据节点提交的反馈进行下一步合理操作。最终，将简单易用的接口和性能高效、功能稳定的系统提供
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正文ZooKeeper很流行，有个基本的疑问：ZooKeeper是用来做什么的？之前没有ZK，为什么会诞生ZK？OK，解答一下上面的疑问：（下面是凭直觉说的）ZooKeeper是用于简化分布式应用开发的，对开发者屏蔽一些分布式应用开发过程中的底层细节ZooKeeper对外暴露简单的API，用于支持分布式应用开
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#**NO1：说说zookeeper是什么？**ZooKeeper是一个分布式的，开放源码的分布式应用程序协调服务，是Google的Chubby一个开源的实现（Chubby是不开源的），它是集群的管理者，监视着集群中各个节点的状态根据节点提交的反馈进行下一步合理操作。最终，将简单易用的接口和性能高效、功能稳定的系统提供
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一、什么是ZooKeeperZooKeeper是一个分布式服务协调框架，提供了分布式数据一致性的解决方案，基于ZooKeeper的数据结构，Watcher，选举机制等特点，可以实现数据的发布/订阅，软负载均衡，命名服务，统一配置管理，分布式锁，集群管理等等。二、为什么使用ZooKeeperZooKeeper能保证：更新请求
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#**NO1：说说zookeeper是什么？**ZooKeeper是一个分布式的，开放源码的分布式应用程序协调服务，是Google的Chubby一个开源的实现（Chubby是不开源的），它是集群的管理者，监视着集群中各个节点的状态根据节点提交的反馈进行下一步合理操作。最终，将简单易用的接口和性能高效、功能稳定的系统提供
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