Hadoop HA搭建步骤配置文件

Hadoop HA 搭建：

准备四台机器：

1.配置hdfs-site.xml 文件

<property>
        <name>dfs.replication</name>
        <value>2</value>
    </property>
<property>
  <name>dfs.nameservices</name>
  <value>mycluster</value>
</property>
<property>
  <name>dfs.ha.namenodes.mycluster</name>
  <value>nn1,nn2</value>
</property>
<property>
  <name>dfs.namenode.rpc-address.mycluster.nn1</name>
  <value>node1:8020</value>
</property>
<property>
  <name>dfs.namenode.rpc-address.mycluster.nn2</name>
  <value>node2:8020</value>
</property>
<property>
  <name>dfs.namenode.http-address.mycluster.nn1</name>
  <value>node1:50070</value>
</property>
<property>
  <name>dfs.namenode.http-address.mycluster.nn2</name>
  <value>node2:50070</value>
</property>
<property>
  <name>dfs.namenode.shared.edits.dir</name>
  <value>qjournal://node1:8485;node2:8485;node3:8485/mycluster</value>
</property>
<property>
  <name>dfs.journalnode.edits.dir</name>
  <value>/var/ftian/hadoop/ha/jn</value>
</property>
<property>
  <name>dfs.client.failover.proxy.provider.mycluster</name>
  <value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
</property>
<property>
  <name>dfs.ha.fencing.methods</name>
  <value>sshfence</value>
</property>
<property>
  <name>dfs.ha.fencing.ssh.private-key-files</name>
  <value>/root/.ssh/id_dsa</value>

</property>

<property>
   <name>dfs.ha.automatic-failover.enabled</name>
   <value>true</value>

 </property>

2.core-site.xml

<property>
  <name>fs.defaultFS</name>
  <value>hdfs://mycluster</value>
</property>
<property>
        <name>hadoop.tmp.dir</name>
        <value>/var/sxt/hadoop/local</value>
    </property>
<property>
   <name>ha.zookeeper.quorum</name>
   <value>node2:2181,node3:2181,node4:2181</value>
 </property>

配置完成后向node2,node3,node4分发 hdfs-site.xml,core-site.xml文件

3.配置zookeeper(node2)

把zoo_sample.cfg文件重新命名为zoo.cfg.

conf/zoo.cfg

dataDir=/var/sxt/zk

在zoo.cfg文件末尾加：

server.1=192.168.64.12:2888:3888

server.2=192.168.64.13:2888:3888

server.3=192.168.64.14:2888:3888

/var/sxt/zk

在zk文件下 执行：echo 1 > myid (在node2,node3,node4分别执行)

分发给node3,node4.

4.启动配置

1).zkServer.sh start(node2,node3,node4)   在node1上格式化 hdfs zkfc -formatZK

2).hadoop-daemon.sh start journalnode(node1,node2,node3)

3).node1 

hdfs namenode –format

hadoop-deamon.sh start namenode

node2: hdfs namenode  -bootstrapStandby

4).start-dfs.sh