1.集群规划:
主机名 IP 安装的软件
执行的进程
drguo1 192.168.80.149 jdk、hadoop
NameNode、DFSZKFailoverController(zkfc)、ResourceManager
drguo2 192.168.80.150 jdk、hadoop
NameNode、DFSZKFailoverController(zkfc)、ResourceManager
drguo3 192.168.80.151 jdk、hadoop、zookeeper
DataNode、NodeManager、JournalNode、QuorumPeerMain
drguo4 192.168.80.152 jdk、hadoop、zookeeper
DataNode、NodeManager、JournalNode、QuorumPeerMain
drguo5 192.168.80.153 jdk、hadoop、zookeeper
DataNode、NodeManager、JournalNode、QuorumPeerMain
排的好好的,显示出来就乱了!!
!
2.前期准备:
准备五台机器,改动静态IP、主机名、主机名与IP的映射。关闭防火墙。安装JDK并配置环境变量(不会请看这http://blog.csdn.net/dr_guo/article/details/50886667),创建用户:用户组,SSH免password登录SSH免password登录(报错请看这http://blog.csdn.net/dr_guo/article/details/50967442)。
注意:要把127.0.1.1那一行凝视掉。要不然会出现jps显示有datanode,但网页显示live nodes为0。
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凝视之后就正常了。好像有人没凝视也正常,我也不知道为什么0.0
3.搭建zookeeper集群(drguo3/drguo4/drguo5)
4.正式開始搭建Hadoop HA集群
去官网下最新的Hadoop(http://apache.opencas.org/hadoop/common/stable/),眼下最新的是2.7.2,下载完之后把它放到/opt/Hadoop下
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- guo@guo:~/下载$ mv ./hadoop-2.7.2.tar.gz /opt/Hadoop/
- mv: 无法创建普通文件"/opt/Hadoop/hadoop-2.7.2.tar.gz": 权限不够
- guo@guo:~/下载$ su root
- password:
- root@guo:/home/guo/下载# mv ./hadoop-2.7.2.tar.gz /opt/Hadoop/
解压
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- guo@guo:/opt/Hadoop$ sudo tar -zxf hadoop-2.7.2.tar.gz
- [sudo] guo 的password:
解压jdk的时候我用的是tar -zxvf。当中的v呢就是看一下解压的过程。不想看你能够不写。
改动opt文件夹全部者(用户:用户组)直接把opt文件夹的全部者/组换成了guo。详细情况在ZooKeeper全然分布式集群搭建说过。
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- root@guo:/opt/Hadoop# chown -R guo:guo /opt
环境变量设置
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- guo@guo:/opt/Hadoop$ sudo gedit /etc/profile
在最后加上(这样设置在运行bin/sbin文件夹下的脚本时就不用进入该文件夹用了)
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- #hadoop
- export HADOOP_HOME=/opt/Hadoop/hadoop-2.7.2
- export PATH=$PATH:$HADOOP_HOME/sbin
- export PATH=$PATH:$HADOOP_HOME/bin
然后更新配置
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- guo@guo:/opt/Hadoop$ source /etc/profile
改动/opt/Hadoop/hadoop-2.7.2/etc/hadoop下的hadoop-env.sh
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- guo@guo:/opt/Hadoop$ cd hadoop-2.7.2
- guo@guo:/opt/Hadoop/hadoop-2.7.2$ cd etc/hadoop/
- guo@guo:/opt/Hadoop/hadoop-2.7.2/etc/hadoop$ sudo gedit ./hadoop-env.sh
进入文件后
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- export JAVA_HOME=${JAVA_HOME}#将这个改成JDK路径,例如以下
- export JAVA_HOME=/opt/Java/jdk1.8.0_73
然后更新文件配置
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- guo@guo:/opt/Hadoop/hadoop-2.7.2/etc/hadoop$ source ./hadoop-env.sh
前面配置和单机模式一样。我就直接复制了。
<configuration>
<!-- 指定hdfs的nameservice为ns1 -->
<property>
<name>fs.defaultFS</name>
<value>hdfs://ns1/</value>
</property>
<!-- 指定hadoop暂时文件夹 -->
<property>
<name>hadoop.tmp.dir</name>
<value>/opt/Hadoop/hadoop-2.7.2/tmp</value>
</property>
<!-- 指定zookeeper地址 -->
<property>
<name>ha.zookeeper.quorum</name>
<value>drguo3:2181,drguo4:2181,drguo5:2181</value>
</property>
</configuration>
改动hdfs-site.xml
<configuration>
<!--指定hdfs的nameservice为ns1,须要和core-site.xml中的保持一致 -->
<property>
<name>dfs.nameservices</name>
<value>ns1</value>
</property>
<!-- ns1以下有两个NameNode,各自是nn1,nn2 -->
<property>
<name>dfs.ha.namenodes.ns1</name>
<value>nn1,nn2</value>
</property>
<!-- nn1的RPC通信地址 -->
<property>
<name>dfs.namenode.rpc-address.ns1.nn1</name>
<value>drguo1:9000</value>
</property>
<!-- nn1的http通信地址 -->
<property>
<name>dfs.namenode.http-address.ns1.nn1</name>
<value>drguo1:50070</value>
</property>
<!-- nn2的RPC通信地址 -->
<property>
<name>dfs.namenode.rpc-address.ns1.nn2</name>
<value>drguo2:9000</value>
</property>
<!-- nn2的http通信地址 -->
<property>
<name>dfs.namenode.http-address.ns1.nn2</name>
<value>drguo2:50070</value>
</property>
<!-- 指定NameNode的元数据在JournalNode上的存放位置 -->
<property>
<name>dfs.namenode.shared.edits.dir</name>
<value>qjournal://drguo3:8485;drguo4:8485;drguo5:8485/ns1</value>
</property>
<!-- 指定JournalNode在本地磁盘存放数据的位置 -->
<property>
<name>dfs.journalnode.edits.dir</name>
<value>/opt/Hadoop/hadoop-2.7.2/journaldata</value>
</property>
<!-- 开启NameNode失败自己主动切换 -->
<property>
<name>dfs.ha.automatic-failover.enabled</name>
<value>true</value>
</property>
<!-- 配置失败自己主动切换实现方式 -->
<property>
<name>dfs.client.failover.proxy.provider.ns1</name>
<value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
</property>
<!-- 配置隔离机制方法。多个机制用换行切割,即每一个机制暂用一行-->
<property>
<name>dfs.ha.fencing.methods</name>
<value>
sshfence
shell(/bin/true)
</value>
</property>
<!-- 使用sshfence隔离机制时须要ssh免登陆 -->
<property>
<name>dfs.ha.fencing.ssh.private-key-files</name>
<value>/home/guo/.ssh/id_rsa</value>
</property>
<!-- 配置sshfence隔离机制超时时间 -->
<property>
<name>dfs.ha.fencing.ssh.connect-timeout</name>
<value>30000</value>
</property>
</configuration>
先将mapred-site.xml.template改名为mapred-site.xml然后改动mapred-site.xml
<configuration>
<!-- 指定mr框架为yarn方式 -->
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
</configuration>
<configuration>
<!-- 开启RM高可用 -->
<property>
<name>yarn.resourcemanager.ha.enabled</name>
<value>true</value>
</property>
<!-- 指定RM的cluster id -->
<property>
<name>yarn.resourcemanager.cluster-id</name>
<value>yrc</value>
</property>
<!-- 指定RM的名字 -->
<property>
<name>yarn.resourcemanager.ha.rm-ids</name>
<value>rm1,rm2</value>
</property>
<!-- 分别指定RM的地址 -->
<property>
<name>yarn.resourcemanager.hostname.rm1</name>
<value>drguo1</value>
</property>
<property>
<name>yarn.resourcemanager.hostname.rm2</name>
<value>drguo2</value>
</property>
<!-- 指定zk集群地址 -->
<property>
<name>yarn.resourcemanager.zk-address</name>
<value>drguo3:2181,drguo4:2181,drguo5:2181</value>
</property>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
</configuration>
改动slaves
drguo3
drguo4
drguo5
把Hadoop整个文件夹复制到drguo2/3/4/5,拷之前把share下doc删了(文档不用拷)。这样会快点。
5.启动zookeeper集群(分别在drguo3、drguo4、drguo5上启动zookeeper)
guo@drguo3:~$ zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.8/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
guo@drguo3:~$ jps
2005 Jps
1994 QuorumPeerMain
guo@drguo3:~$ ssh drguo4
Welcome to Ubuntu 15.10 (GNU/Linux 4.2.0-16-generic x86_64) * Documentation: https://help.ubuntu.com/ Last login: Fri Mar 25 14:04:43 2016 from 192.168.80.151
guo@drguo4:~$ zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.8/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
guo@drguo4:~$ jps
1977 Jps
1966 QuorumPeerMain
guo@drguo4:~$ exit
注销
Connection to drguo4 closed.
guo@drguo3:~$ ssh drguo5
Welcome to Ubuntu 15.10 (GNU/Linux 4.2.0-16-generic x86_64) * Documentation: https://help.ubuntu.com/ Last login: Fri Mar 25 14:04:56 2016 from 192.168.80.151
guo@drguo5:~$ zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.8/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
guo@drguo5:~$ jps
2041 Jps
2030 QuorumPeerMain
guo@drguo5:~$ exit
注销
Connection to drguo5 closed.
guo@drguo3:~$ zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.8/bin/../conf/zoo.cfg
Mode: leader
6.启动journalnode(分别在drguo3、drguo4、drguo5上启动journalnode)注意仅仅有第一次须要这么启动,之后启动hdfs会包括journalnode。
guo@drguo3:~$ hadoop-daemon.sh start journalnode
starting journalnode, logging to /opt/Hadoop/hadoop-2.7.2/logs/hadoop-guo-journalnode-drguo3.out
guo@drguo3:~$ jps
2052 Jps
2020 JournalNode
1963 QuorumPeerMain
guo@drguo3:~$ ssh drguo4
Welcome to Ubuntu 15.10 (GNU/Linux 4.2.0-16-generic x86_64) * Documentation: https://help.ubuntu.com/ Last login: Fri Mar 25 00:09:08 2016 from 192.168.80.149
guo@drguo4:~$ hadoop-daemon.sh start journalnode
starting journalnode, logging to /opt/Hadoop/hadoop-2.7.2/logs/hadoop-guo-journalnode-drguo4.out
guo@drguo4:~$ jps
2103 Jps
2071 JournalNode
1928 QuorumPeerMain
guo@drguo4:~$ exit
注销
Connection to drguo4 closed.
guo@drguo3:~$ ssh drguo5
Welcome to Ubuntu 15.10 (GNU/Linux 4.2.0-16-generic x86_64) * Documentation: https://help.ubuntu.com/ Last login: Thu Mar 24 23:52:17 2016 from 192.168.80.152
guo@drguo5:~$ hadoop-daemon.sh start journalnode
starting journalnode, logging to /opt/Hadoop/hadoop-2.7.2/logs/hadoop-guo-journalnode-drguo5.out
guo@drguo5:~$ jps
2276 JournalNode
2308 Jps
1959 QuorumPeerMain
guo@drguo5:~$ exit
注销
Connection to drguo5 closed.
镜像都是复制的。咋还变异了呢。
7.格式化HDFS(在drguo1上运行)
guo@drguo1:/opt$ hdfs namenode -format
这回又出问题了,还是汉语凝视闹得,drguo1/2/3也全删了,问题解决。
guo@drguo1:/opt/Hadoop/hadoop-2.7.2$ scp -r tmp/ drguo2:/opt/Hadoop/hadoop-2.7.2/
guo@drguo1:/opt$ hdfs zkfc -formatZK
guo@drguo1:/opt$ start-dfs.sh
guo@drguo1:/opt$ start-yarn.sh
1.drguo2的resourcemanager须要手动单独启动:
3.NN 由standby转化成active
hdfs haadmin -transitionToActive nn1 --forcemanual
大功告成!!
!
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