hadoop2集群搭建+HA配置
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linux环境:redhat6.3 master slave1,slave2,slave3四台机器
zookeeper3.4.5集群:slave1,slave2,slave3三个节点
journalnode集群:slave1,slave2,slave3三个节点
hadoop namenode HA:master,slave1两个节点
hadoop datanode:master slave1,slave2,slave3四个节点
1.首先需要安装jdk,配置免秘钥登录,安装zookeeper集群,前面的博客有写过这里就不写了。
2.下载安装hadoop2.7.1
tar -zxvf hadoop-2.7.1-src.tar.gz
3.配置环境变量
vi /etc/profile
4.进入hadoop的配置文件目录
cd /home/hadoop/hadoop-2.7.1/etc/hadoop
5.修改hadoop-env.sh导入JAVA_HOME
vi hadoop-env.sh
6.修改core-site.xml加入如下配置
vi core-site.xml
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://mycluster</value> #这里的mycluster是hdfs-site.xml里的dfs.nameservices的值,如果配置的是具体的节点名+端口的话hadoop的HA是不可用的。
</property>
<property>
<name>ha.zookeeper.quorum</name>
<value>slave1:2181,slave2:2181,slave3:2181</value>
</property>
</configuration>
7.修改hdfs-site.xml加入如下配置,配置太多了只能上代码了。
vi hdfs-site.xml
<configuration>
<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>master:8020</value>
</property>
<property>
<name>dfs.namenode.rpc-address.mycluster.nn2</name>
<value>slave1:8020</value>
</property>
<property>
<name>dfs.namenode.http-address.mycluster.nn1</name>
<value>master:50070</value>
</property>
<property>
<name>dfs.namenode.http-address.mycluster.nn2</name>
<value>slave1:50070</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:///home/hadoop/hdfs/name</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:///home/hadoop/hdfs/data</value>
</property>
<property>
<name>dfs.namenode.shared.edits.dir</name>
<value>qjournal://slave1:8485;slave2:8485;slave3:8485/mycluster</value>
</property>
<property>
<name>dfs.journalnode.edits.dir</name>
<value>/home/hadoop/hdfs/journal</value>
</property>
<property>
<name>dfs.ha.automatic-failover.enabled</name>
<value>true</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>/home/hadoop/.ssh/id_rsa</value>
</property>
<property>
<name>dfs.replication</name>
<value>2</value>
</property>
</configuration>
8.修改mapred-site.xml加入如下配置
9.修改yarn-site.xml加入如下配置
vi yarn-site.xml
<configuration>
<property>
<name>yarn.resourcemanager.hostname</name>
<value>master</value>
</property>
<property>
<name>yarn.resourcemanager.address</name>
<value>master:8032</value>
</property>
<property>
<name>yarn.resourcemanager.scheduler.address</name>
<value>master:8030</value>
</property>
<property>
<name>yarn.resourcemanager.webapp.address</name>
<value>master:8088</value>
</property>
<property>
<name>yarn.resourcemanager.webapp.https.address</name>
<value>master:8090</value>
</property>
<property>
<name>yarn.resourcemanager.resource-tracker.address</name>
<value>master:8031</value>
</property>
<property>
<name>yarn.resourcemanager.admin.address</name>
<value>master:8033</value>
</property>
<property>
<name>yarn.resourcemanager.scheduler.class</name>
<value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler</value>
</property>
<property>
<name>yarn.scheduler.fair.allocation.file</name>
<value>/home/hadoop/hadoop-2.7.1/etc/hadoop/fairscheduler.xml</value>
</property>
<property>
<name>yarn.nodemanager.local-dirs</name>
<value>/home/hadoop/yarn/local</value>
</property>
<property>
<name>yarn.log-aggregation-enable</name>
<value>true</value>
</property>
<property>
<name>yarn.nodemanager.remote-app-log-dir</name>
<value>/tmp/logs</value>
</property>
<property>
<name>yarn.nodemanager.resource.memory-mb</name>
<value>4096</value>
</property>
<property>
<name>yarn.nodemanager.resource.cpu-vcores</name>
<value>4</value>
</property>
<!-- Site specific YARN configuration properties -->
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
</configuration>
10.修改slaves把datanode节点机器全部加进去
vi slaves
11.启动zookeeper集群(slave1,slave2,slave3节点)
cd /home/hadoop/zookeeper-3.4.5/bin/
./zkServer.sh start
./zkServer.sh status验证是否启动成功
12.启动journalnode集群,在slave1,slave2,slave3节点的hadoop目录下分别执行如下命令
sbin/hadoop-daemon.sh start journalnode
13.格式化第一个namenode并启动(master节点)
bin/hdfs namenode -format
sbin/hadoop-daemon.sh start namenode
14.将第一个namenode节点的数据同步到第二个namenode节点(slave1节点)并启动
bin/hdfs namenode -bootstrapStandby
sbin/hadoop-daemon.sh start namenode
15.在两个namenode节点启动zookeeperFailoverCotroller
sbin/hadoop-daemon.sh start zkfc
16.在master节点启动所有的datanode
sbin/hadoop-daemons.sh start datanode
17.在master节点上启动yarn
sbin/start-yarn.sh
18.最后验证HA是否可用
kill掉处于active状态的namenode节点,看standby节点的namenode是否能切换成active状态。
OK,暂时没上传图哈哈,先写到这!
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