Zookeeper合奏不出现 [英] Zookeeper ensemble not coming up

问题描述

我正在尝试根据文档.所有这些都在Linux Ubuntu上. 在所有三个节点上的配置文件如下所示:

I am trying to configure the ensemble of 3 nodes following the documentation. All of them are on Linux Ubuntu. on all the three nodes configuration file looks like this :

zoo.cfg在$ ZOOKEEPER_HOME/conf下

tickTime=2000
dataDir=/home/zkuser/zookeeper_data
clientPort=2181
initLimit=5
syncLimit=2
server.1=ip.of.zk1:2888:3888
server.2=ip.of.zk2:2888:3888
server.3=ip.of.zk3:2888:3888

我还分别在/home/zkuser/zookeeper_data/目录下放置了"myid"文件. 此myid文件包含位于节点(ip.of.zk1)上的1，依此类推.

I've also placed respective "myid" files under /home/zkuser/zookeeper_data/ directory. This myid files contain 1 which is on node (ip.of.zk1), so on and so forth.

当我使用bin/zkServer.sh启动zk服务器时，启动时不会在控制台上显示任何异常. 但是，当我打开bin目录下的zookeeper.out文件时，看到以下错误.

When I start the zk server using bin/zkServer.sh start without showing any exception on the console. However when I open the zookeeper.out files under bin directory I see the following errors.

2014-11-04 00:23:49,120 [myid:3] - WARN  [WorkerSender[myid=3]:QuorumCnxManager@382] - Cannot open channel to 1 at election address /ip.of.zk1:3888
java.net.NoRouteToHostException: No route to host
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:385)
    at java.net.Socket.connect(Socket.java:546)
    at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:368)
    at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:341)
    at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:449)
    at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:430)
    at java.lang.Thread.run(Thread.java:701)
2014-11-04 00:23:49,123 [myid:3] - WARN  [WorkerSender[myid=3]:QuorumCnxManager@382] - Cannot open channel to 2 at election address /ip.of.zk2:3888
java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:385)
    at java.net.Socket.connect(Socket.java:546)
    at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:368)
    at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:341)
    at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:449)
    at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:430)
    at java.lang.Thread.run(Thread.java:701)

注意:我已经在每台计算机上使用iptables打开了相应的端口. 例如 : 链输入(接受政策)

Note :I've opened the appropriate ports using iptables on each machines. For example : Chain INPUT (policy ACCEPT)

target     prot opt source               destination         
ACCEPT     all  --  IP.of.ZK1       anywhere            
ACCEPT     all  --  IP.of.ZK2       anywhere            
ACCEPT     all  --  IP.of.ZK3       anywhere            

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination    

有人可以告诉我我一直在想什么吗?

Can anyone please tell me what I've been missing ?

关于， JE

推荐答案

确保:

• 您已经在所有3台服务器上启动了Zookeeper服务器
• 所有服务器通过运行echo ruok | netcat ip.of.zk2 2181以非错误模式运行.如果可以，则服务器应使用imok响应(仅供参考，这是一个列表支持的所有4个字母的命令)
• /home/zkuser/zookeeper_data/myid分别为每个服务器包含值1/2/3
• 您可以从第一台服务器ping其他2台服务器

• you have started the Zookeeper server on all 3 servers
• all servers run in non-error mode by running echo ruok | netcat ip.of.zk2 2181. If ok, the server should respond with imok (FYI, here's a list of all supported 4-letter commands)
• /home/zkuser/zookeeper_data/myid contains values 1/2/3 for each server, respectively
• you can ping other 2 servers from the first server

如果有兴趣，我已经创建了一个vagrant + ansible脚本来创建3节点虚拟Zookeeper集群，请参见

If interested, I have created a vagrant+ansible script to create a 3-node virtual Zookeeper cluster, see https://github.com/mkrcah/virtual-zookeeper-cluster

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