Hadoop的HA搭建

一、hdfs的HA

		ZK	NN	DN	RM	NM	JN	ZKFC
node1	1	1		1		1	1
node2	1	1	1	1	1	1	1
node3	1		1		1	1

1、关闭防火墙
service iptables stop

2、时间同步
yum install ntp
ntpdate -u s2c.time.edu.cn

或者
date -s 20180503

3、免**
在两个主节点生成**文件

ssh-****** -t rsa -P '' -f ~/.ssh/id_rsa
ssh-copy-id ip

node1-->node1,node2,node3
node2-->node1,node2,node3

4、修改hadoop配置文件
core-site.xml
hdfs-site.xml

同步到其它节点
	 scp * node2:`pwd`
	 scp * node3:`pwd`

5、删除hadoop数据存储目录下的文件 每个节点都需要删除
rm -rf /usr/local/soft/hadoop-2.6.0/tmp

6、启动zookeeper 三台都需要启动
zkServer.sh start
zkServer.sh status

7、启动JN
三台JN上执行 启动命令：
hadoop-daemon.sh start journalnode

8、格式化 在一台NN上执行
hdfs namenode -format
启动当前的NN
hadoop-daemon.sh start namenode

9、执行同步 没有格式化的NN上执行 在另外一个namenode上面执行
hdfs namenode -bootstrapStandby

10、格式化ZK 在已经启动的namenode上面执行
！！一定要先 把zk集群正常 启动起来
hdfs zkfc -formatZK

11、启动hdfs集群,在启动了namenode的节点上执行
start-dfs.sh

二、yarn 高可用

1、修改配置文件
yarn-site.xml
mapred-site.xml

同步到所有节点

2、启动yarn
start-yarn.sh

3、在另外一台主节点上启动RM
yarn-daemon.sh start resourcemanager

3、配置文件

core-site.xml

<?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>
	<property>
		<name>fs.defaultFS</name>
		<value>hdfs://cluster</value>
	</property>
	<property>
		<name>hadoop.tmp.dir</name>
		<value>/usr/local/soft/hadoop-2.6.0/tmp</value>
	</property>
	<property>
		<name>fs.trash.interval</name>
		<value>1440</value>
	</property>
	<property>
	      <name>ha.zookeeper.quorum</name>
	      <value>node1:2181,node2:2181,node3:2181</value>
	</property>
</configuration>

hdfs-site.xml

<?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>
<!-- 指定hdfs元数据存储的路径 -->
<property>
<name>dfs.namenode.name.dir</name>
<value>/usr/local/soft/hadoop-2.6.0/data/namenode</value>
</property>

<!-- 指定hdfs数据存储的路径 -->
<property>
<name>dfs.datanode.data.dir</name>
<value>/usr/local/soft/hadoop-2.6.0/data/datanode</value>
</property>

<!-- 数据备份的个数 -->
<property>
<name>dfs.replication</name>
<value>1</value>
</property>

<!-- 关闭权限验证 -->
<property>
<name>dfs.permissions.enabled</name>
<value>false</value>
</property>

<!-- 开启WebHDFS功能（基于REST的接口服务） -->
<property>
<name>dfs.webhdfs.enabled</name>
<value>true</value>
</property>

<!-- //////////////以下为HDFS HA的配置////////////// -->
<!-- 指定hdfs的nameservices名称为cluster -->
<property>
<name>dfs.nameservices</name>
<value>cluster</value>
</property>

<!-- 指定cluster的两个namenode的名称分别为nn1,nn2 -->
<property>
<name>dfs.ha.namenodes.cluster</name>
<value>nn1,nn2</value>
</property>

<!-- 配置nn1,nn2的rpc通信端口 -->
<property>
<name>dfs.namenode.rpc-address.cluster.nn1</name>
<value>node1:8020</value>
</property>
<property>
<name>dfs.namenode.rpc-address.cluster.nn2</name>
<value>node2:8020</value>
</property>

<!-- 配置nn1,nn2的http通信端口 -->
<property>
<name>dfs.namenode.http-address.cluster.nn1</name>
<value>node1:50070</value>
</property>
<property>
<name>dfs.namenode.http-address.cluster.nn2</name>
<value>node2:50070</value>
</property>

<!-- 指定namenode元数据存储在journalnode中的路径 -->
<property>
<name>dfs.namenode.shared.edits.dir</name>
<value>qjournal://node1:8485;node2:8485;node3:8485/cluster</value>
</property>

<!-- 指定journalnode日志文件存储的路径 -->
<property>
<name>dfs.journalnode.edits.dir</name>
<value>/usr/local/soft/hadoop-2.6.0/data/journal</value>
</property>

<!-- 指定HDFS客户端连接active namenode的java类 -->
<property>
<name>dfs.client.failover.proxy.provider.cluster</name>
<value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
</property>

<!-- 配置隔离机制为ssh -->
<property>
<name>dfs.ha.fencing.methods</name>
<value>sshfence</value>
</property>

<!-- 指定秘钥的位置 -->
<property>
<name>dfs.ha.fencing.ssh.private-key-files</name>
<value>/root/.ssh/id_rsa</value>
</property>

<!-- 开启自动故障转移 -->
<property>
<name>dfs.ha.automatic-failover.enabled</name>
<value>true</value>
</property>
</configuration>

mapred-site.xml

<?xml version="1.0"?>
<?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>
<!-- 指定MapReduce计算框架使用YARN -->
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>

<!-- 指定jobhistory server的rpc地址 -->
<property>
<name>mapreduce.jobhistory.address</name>
<value>node1:10020</value>
</property>

<!-- 指定jobhistory server的http地址 -->
<property>
<name>mapreduce.jobhistory.webapp.address</name>
<value>node1:19888</value>
</property>

<!-- 开启uber模式（针对小作业的优化） -->
<property>
<name>mapreduce.job.ubertask.enable</name>
<value>true</value>
</property>

<!-- 配置启动uber模式的最大map数 -->
<property>
<name>mapreduce.job.ubertask.maxmaps</name>
<value>9</value>
</property>

<!-- 配置启动uber模式的最大reduce数 -->
<property>
<name>mapreduce.job.ubertask.maxreduces</name>
<value>1</value>
</property>
</configuration>

yarn-site.xml

<?xml version="1.0"?>
<!--
  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.
-->
<configuration>
<!-- NodeManager上运行的附属服务，需配置成mapreduce_shuffle才可运行MapReduce程序 -->
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>

<!-- 配置Web Application Proxy安全代理（防止yarn被攻击） -->
<property>
<name>yarn.web-proxy.address</name>
<value>node2:8888</value>
</property>

<!-- 开启日志 -->
<property>
<name>yarn.log-aggregation-enable</name>
<value>true</value>
</property>

<!-- 配置日志删除时间为7天，-1为禁用，单位为秒 -->
<property>
<name>yarn.log-aggregation.retain-seconds</name>
<value>604800</value>
</property>

<!-- 修改日志目录 -->
<property>
<name>yarn.nodemanager.remote-app-log-dir</name>
<value>/logs</value>
</property>

<!-- 配置nodemanager可用的资源内存 -->
<property>
<name>yarn.nodemanager.resource.memory-mb</name>
<value>2048</value>
</property>

<!-- 配置nodemanager可用的资源CPU -->
<property>
<name>yarn.nodemanager.resource.cpu-vcores</name>
<value>2</value>
</property>

<!-- //////////////以下为YARN HA的配置////////////// -->
<!-- 开启YARN HA -->
<property>
<name>yarn.resourcemanager.ha.enabled</name>
<value>true</value>
</property>

<!-- 启用自动故障转移 -->
<property>
<name>yarn.resourcemanager.ha.automatic-failover.enabled</name>
<value>true</value>
</property>

<!-- 指定YARN HA的名称 -->
<property>
<name>yarn.resourcemanager.cluster-id</name>
<value>yarncluster</value>
</property>

<!-- 指定两个resourcemanager的名称 -->
<property>
<name>yarn.resourcemanager.ha.rm-ids</name>
<value>rm1,rm2</value>
</property>

<!-- 配置rm1，rm2的主机 -->
<property>
<name>yarn.resourcemanager.hostname.rm1</name>
<value>node1</value>
</property>
<property>
<name>yarn.resourcemanager.hostname.rm2</name>
<value>node2</value>
</property>

<!-- 配置YARN的http端口 -->
<property>
<name>yarn.resourcemanager.webapp.address.rm1</name>
<value>node1:8088</value>
</property>	
<property>
<name>yarn.resourcemanager.webapp.address.rm2</name>
<value>node2:8088</value>
</property>

<!-- 配置zookeeper的地址 -->
<property>
<name>yarn.resourcemanager.zk-address</name>
<value>node1:2181,node2:2181,node3:2181</value>
</property>

<!-- 配置zookeeper的存储位置 -->
<property>
<name>yarn.resourcemanager.zk-state-store.parent-path</name>
<value>/rmstore</value>
</property>

<!-- 开启yarn resourcemanager restart -->
<property>
<name>yarn.resourcemanager.recovery.enabled</name>
<value>true</value>
</property>

<!-- 配置resourcemanager的状态存储到zookeeper中 -->
<property>
<name>yarn.resourcemanager.store.class</name>
<value>org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore</value>
</property>

<!-- 开启yarn nodemanager restart -->
<property>
<name>yarn.nodemanager.recovery.enabled</name>
<value>true</value>
</property>

<!-- 配置nodemanager IPC的通信端口 -->
<property>
<name>yarn.nodemanager.address</name>
<value>0.0.0.0:45454</value>
</property>
</configuration>