在ZooKeeper上部署Fabric8时出错

Question

我正在尝试在Fabric8中运行预先打包的Fabric8。三个实例作为一个整体被创建和链接。但是，当我从Pods打开其中一个日志时，我会看到如下所示的错误。有人知道怎么修吗？

16:59:39,387 [myid:2] - WARN [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@400] - Cannot open channel to 1 at election address zookeeper-1:3888
java.net.UnknownHostException: zookeeper-1
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:381)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:426)
at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:843)
at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:822)
2016-05-17 16:59:39,395 [myid:2] - WARN [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:QuorumPeer$QuorumServer@155] - Failed to resolve address: zookeeper-1
java.net.UnknownHostException: zookeeper-1: unknown error
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:907)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1302)
at java.net.InetAddress.getAllByName0(InetAddress.java:1255)
at java.net.InetAddress.getAllByName(InetAddress.java:1171)
at java.net.InetAddress.getAllByName(InetAddress.java:1105)
at java.net.InetAddress.getByName(InetAddress.java:1055)
at org.apache.zookeeper.server.quorum.QuorumPeer$QuorumServer.recreateSocketAddresses(QuorumPeer.java:148)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:407)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:426)
at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:843)
at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:822)
2016-05-17 16:59:39,395 [myid:2] - WARN [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@400] - Cannot open channel to 3 at election address zookeeper-3:3888
java.net.UnknownHostException: zookeeper-3
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:381)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:426)
at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:843)
at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:822)
2016-05-17 16:59:39,402 [myid:2] - WARN [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:QuorumPeer$QuorumServer@155] - Failed to resolve address: zookeeper-3
java.net.UnknownHostException: zookeeper-3: unknown error
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:907)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1302)
at java.net.InetAddress.getAllByName0(InetAddress.java:1255)
at java.net.InetAddress.getAllByName(InetAddress.java:1171)
at java.net.InetAddress.getAllByName(InetAddress.java:1105)
at java.net.InetAddress.getByName(InetAddress.java:1055)
at org.apache.zookeeper.server.quorum.QuorumPeer$QuorumServer.recreateSocketAddresses(QuorumPeer.java:148)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:407)
at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:426)
at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:843)
at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:822)
2016-05-17 16:59:39,402 [myid:2] - INFO [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:FastLeaderElection@852] - Notification time out: 60000
2016-05-17 17:00:39,402 [myid:2] - WARN         [QuorumPeer[myid=2]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@400] - Cannot open channel to 1 at election address zookeeper-1:3888

Answer 1

Failed to resolve address: zookeeper-3
...
Failed to resolve address: zookeeper-1

动物园管理员在尝试连接到所有可访问的实例之后，首先开始并尝试进行领导人选举。你的实例似乎都是不可触及的。

您可能忘记更新zoo.cfg文件中的条目。默认的zoo.cfg如下所示

tickTime=2000
dataDir=/var/lib/zookeeper/
clientPort=2181
initLimit=5
syncLimit=2
server.1=zoo1:2888:3888
server.2=zoo2:2888:3888
server.3=zoo3:2888:3888 

您需要用适当的主机名或解析为唯一主机名的ips更新zoo1、zoo2、zoo3。

Answer 2

• 通过更新每个节点上的本地DNS或hosts文件，确保所有节点都知道其他节点的主机名(而不是IP)。

或

• 将ZooKeeper配置(zoo.cfg)更改为使用IP地址而不是节点主机名。

ZooKeeper试图解析主机名，但无法解决，因此出现了错误。