使用主机系统上的客户端访问在虚拟机中运行的HBase

Question

我试着用一个客户端程序把一些数据写入hbase

HBase @ Hadoop在来自Cloudera @ ubuntu的预配置虚拟机中运行。

客户端在托管虚拟机的系统上运行，并直接在虚拟机中运行客户端。

因此，现在我想使用虚拟机外部的客户端来访问虚拟机上的服务器

我正在使用NAT。为了能够访问像HBase主服务器这样的服务器，我在虚拟机器中配置了端口转发的虚拟机上的HUE..running：

​

因此，我可以访问HBase大师的概述网站，色调..

为了在vm上的服务器上运行客户机，我创建了hbase-site.xml，其中包含以下内容：

<configuration>
    <property>
        <name>hbase.zookeeper.quorum</name>
        <value>localhost</value>
    </property>
    <property>
        <name>hbase.zookeeper.property.clientPort</name>
        <value>9997</value>
    </property>
    <property>
        <name>hbase.master</name>
        <value>localhost:9999</value>
    </property>
</configuration>

所以我认为转发是可行的：

运行客户端时，日志中的错误消息如下所示：

11/09/07 17:48:00 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:2181 sessionTimeout=180000 watcher=hconnection
11/09/07 17:48:00 INFO zookeeper.ClientCnxn: Opening socket connection to server localhost/127.0.0.1:2181
11/09/07 17:48:01 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused: no further information
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
11/09/07 17:48:01 INFO zookeeper.ClientCnxn: Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181
11/09/07 17:48:01 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.SocketException: Address family not supported by protocol family: connect
    at sun.nio.ch.Net.connect(Native Method)
    at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:500)
    at org.apache.zookeeper.ClientCnxn$SendThread.startConnect(ClientCnxn.java:1050)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1077)
11/09/07 17:48:03 INFO zookeeper.ClientCnxn: Opening socket connection to server localhost/127.0.0.1:2181
11/09/07 17:48:04 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused: no further information
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
11/09/07 17:48:04 INFO zookeeper.ClientCnxn: Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181
11/09/07 17:48:04 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.SocketException: Address family not supported by protocol family: connect
    at sun.nio.ch.Net.connect(Native Method)
    at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:500)
    at org.apache.zookeeper.ClientCnxn$SendThread.startConnect(ClientCnxn.java:1050)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1077)
11/09/07 17:48:05 INFO zookeeper.ClientCnxn: Opening socket connection to server localhost/127.0.0.1:2181

正确的连接日志(直接在虚拟机上运行客户端时)如下所示：

11/09/07 09:05:29 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:2181 sessionTimeout=180000 watcher=hconnection
11/09/07 09:05:29 INFO zookeeper.ClientCnxn: Opening socket connection to server localhost/0:0:0:0:0:0:0:1:2181
11/09/07 09:05:29 INFO zookeeper.ClientCnxn: Socket connection established to localhost/0:0:0:0:0:0:0:1:2181, initiating session
11/09/07 09:05:29 INFO zookeeper.ClientCnxn: Session establishment complete on server localhost/0:0:0:0:0:0:0:1:2181, sessionid = 0x132449d36df0006, negotiated timeout = 40000

因此，我现在只在第一个问题之前的日志行中看到连接url不正确，因为端口被正确转发，但IP仍然是localhost，而不是端口转发设置中配置的10.0.2.15：

Opening socket connection to server localhost/127.0.0.1:2181

我发现的唯一提示是在主机(Win7)和虚拟机(Ubuntu)中禁用IPV6 ->，并检查端口->它们是否被正确转发

有谁有主意吗？

Answer 1

为了给阅读这篇文章的用户增加价值，这里有一个解决方案：

Could not resolve the DNS name of cloudera-vm

要解决这个问题，我只需添加到C:\Windows\System32\drivers\etc\hosts：

192.168.56.101  cloudera-vm

因此，每当使用cloudera-vm时，都会将其解析为适当的IP。虚拟机现在以仅主机网络模式运行，并且现在已分配给192.168.56.101。因此不需要端口转发。

仅供比较：

hbase-site.xml

<configuration>
  <property>
    <name>hbase.zookeeper.quorum</name>
    <value>cloudera-vm</value>
  </property>
</configuration>

persistence.xml

<persistence
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
    version="1.0">

    <persistence-unit name="hbase-addressbook"
        transaction-type="RESOURCE_LOCAL">

        <properties>
            <property name="datanucleus.ConnectionURL" value="hbase:cloudera-vm" />
            <property name="datanucleus.ConnectionUserName" value="" />
            <property name="datanucleus.ConnectionPassword" value="" />
            <property name="datanucleus.autoCreateSchema" value="true" />
            <property name="datanucleus.validateTables" value="false" />
            <property name="datanucleus.Optimistic" value="false" />
            <property name="datanucleus.validateConstraints" value="false" />
        </properties>
    </persistence-unit>
</persistence>

在那之后，我得到了另一个错误(连接被拒绝，尽管所有的连接字符串都是正确的)，所以我花了几天的时间寻找原因。

解决方案是通过将以下内容附加到文件中来禁用在虚拟机上运行的Ubuntu的IPV6 : /etc/sysctl.conf

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

重新启动后，一切正常连接并正常工作:)

Answer 2

我认为您可以在代码中清楚地设置配置，如下面的HbaseConfiguration conf = HbaseConfiguration.create()；conf.set("hbase.zookeeper.quorum"，"ubuntu1，ubuntu2")；...也许能帮你..。

Answer 3

你有没有尝试过一个简单的方法：

<property name="connectionURL" value="hbase:master.standalone.hostname:60000"/>