高可用hadoop分布式节点的扩容

解决方案

修改hdfs-site.xml 文件 
 

原xml文件

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!--
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License. See accompanying LICENSE file.
-->

<!-- Put site-specific property overrides in this file. -->
<configuration>
	<!-- NameNode存储元数据信息的路径，实际工作中，一般先确定磁盘的挂载目录，然后多个目录用，进行分割   --> 
	<!--   集群动态上下线 
	       	<property>
		<name>dfs.hosts</name>
		<value>/kkb/install/hadoop-2.6.0-cdh5.14.2/etc/hadoop/accept_host</value>
	</property>
	<property>
		<name>dfs.hosts.exclude</name>
		<value>/kkb/install/hadoop-2.6.0-cdh5.14.2/etc/hadoop/deny_host</value>
	</property>
	-->
	<property>
		<name>dfs.namenode.secondary.http-address</name>
		<value>node01:50090</value>
	</property>
	<property>
		<name>dfs.namenode.http-address</name>
		<value>node01:50070</value>
	</property>
	<property>
		<name>dfs.namenode.name.dir</name>
		<value>file:///kkb/install/hadoop-2.6.0-cdh5.14.2/hadoopDatas/namenodeDatas</value>
	</property>
	<!-- 定义dataNode数据存储的节点位置，实际工作中，一般先确定磁盘的挂载目录，然后多个目录用，进行分割 -->
	<property>
		<name>dfs.datanode.data.dir</name>
		<value>file:///kkb/install/hadoop-2.6.0-cdh5.14.2/hadoopDatas/datanodeDatas</value>
	</property>
	<property>
		<name>dfs.namenode.edits.dir</name>
		<value>file:///kkb/install/hadoop-2.6.0-cdh5.14.2/hadoopDatas/dfs/nn/edits</value>
	</property>
	<property>
		<name>dfs.namenode.checkpoint.dir</name>
		<value>file:///kkb/install/hadoop-2.6.0-cdh5.14.2/hadoopDatas/dfs/snn/name</value>
	</property>
	<property>
		<name>dfs.namenode.checkpoint.edits.dir</name>
		<value>file:///kkb/install/hadoop-2.6.0-cdh5.14.2/hadoopDatas/dfs/nn/snn/edits</value>
	</property>
	<property>
		<name>dfs.replication</name>
		<value>3</value>
	</property>
	<property>
		<name>dfs.permissions</name>
		<value>false</value>
	</property>
	<property>
		<name>dfs.blocksize</name>
		<value>134217728</value>
	</property>
        <!--hdfs web端ui取消ip限制-->
        <property>
                <name>dfs.namenode.http-address</name>
                <value>0.0.0.0:50070</value>
        </property>
</configuration>

修改部分：

修改为：

挂载磁盘目录：

修改路径权限命令：

##给某个路径赋权 给hadoop用户 
sudo chown hadoop:hadoop /home

路径：
/home/hadoop/hadoop-2.6.0-cdh5.14.2/hadoopDatas/datanodeDatas

重启集群