|NO.Z.00013|——————————|^^ 配置 ^^|——|Hadoop&Zookeeper.V13|——|Zookeeper.v13|Hadoop-HA-HDFS-HA搭建.v01|

一、[Hadoop-HA-HDFS-HA搭建]：HDFS-HA集群配置

### --- HDFS-HA集群配置地址

https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoophdfs/HDFSHighAvailabilityWithQJM.html

二、环境准备

### --- 环境准备流程

~~~     修改IP
~~~     修改主机名及主机名和IP地址的映射
~~~     关闭防火墙
~~~     ssh免密登录
~~~     安装JDK，配置环境变量等

三、集群规划

linux121	linux122	linux123
NameNode	NameNode
JournalNode	JournalNode	JournalNode
DataNode	DataNode	DataNode
ZK	ZK	ZK
	ResourceManager
NodeManager	NodeManager	NodeManager

四、启动Zookeeper集群

### --- 启动zookeeper集群

[root@linux121 bin]# zk.sh start

### --- 查看状态

[root@linux121 bin]# zk.sh status
Using config: /opt/yanqi/servers/zookeeper-3.4.14/bin/../conf/zoo.cfg
Mode: follower
Using config: /opt/yanqi/servers/zookeeper-3.4.14/bin/../conf/zoo.cfg
Mode: follower
Using config: /opt/yanqi/servers/zookeeper-3.4.14/bin/../conf/zoo.cfg
Mode: leader

### --- zookeeper进程

[root@linux121 bin]# jps
9561 QuorumPeerMain

五、配置HDFS-HA集群

### --- 停止原先HDFS集群

[root@linux121 ~]# stop-dfs.sh

### --- 在所有节点，/opt/yanqi/servers目录下创建一个ha文件夹

[root@localhost ~]# mkdir /opt/yanqi/servers/ha

### --- 将/opt/yanqi/servers/目录下的 hadoop-2.9.2复制到ha目录下

[root@linux121 servers]# pwd
/opt/yanqi/servers

[root@linux121 servers]# cp -r hadoop-2.9.2 ha

### --- 删除原集群data目录

[root@linux121 ~]# rm -rf /opt/yanqi/servers/ha/hadoop-2.9.2/data

### --- 配置hdfs-site.xml

[root@linux121 ~]# vim /opt/yanqi/servers/ha/hadoop-2.9.2/etc/hadoop/hdfs-site.xml

<configuration>

<property>
        <name>dfs.nameservices</name>
        <value>yanqicluster</value>
</property>
<property>
        <name>dfs.ha.namenodes.yanqicluster</name>
        <value>nn1,nn2</value>
</property>
<property>
        <name>dfs.namenode.rpc-address.yanqicluster.nn1</name>
        <value>linux121:9000</value>
</property>
<property>
        <name>dfs.namenode.rpc-address.yanqicluster.nn2</name>
        <value>linux122:9000</value>
</property>
<property>
        <name>dfs.namenode.http-address.yanqicluster.nn1</name>
        <value>linux121:50070</value>
</property>
<property>
        <name>dfs.namenode.http-address.yanqicluster.nn2</name>
        <value>linux122:50070</value>
</property>
<property>
        <name>dfs.namenode.shared.edits.dir</name>
        <value>qjournal://linux121:8485;linux122:8485;linux123:8485/yanqi</value>
</property>
<property>
        <name>dfs.client.failover.proxy.provider.yanqicluster</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_rsa</value>
</property>
<property>
        <name>dfs.journalnode.edits.dir</name>
        <value>/opt/journalnode</value>
</property>
<property>
        <name>dfs.ha.automatic-failover.enabled</name>
        <value>true</value>
</property>

### --- 配置core-site.xml

[root@linux121 ~]# vim /opt/yanqi/servers/ha/hadoop-2.9.2/etc/hadoop/core-site.xml

<property>
        <name>fs.defaultFS</name>
        <value>hdfs://yanqicluster</value>
</property>
<property>
        <name>hadoop.tmp.dir</name>
        <value>/opt/yanqi/servers/ha/hadoop-2.9.2/data/tmp</value>
</property>
<property>
        <name>ha.zookeeper.quorum</name>
        <value>linux121:2181,linux122:2181,linux123:2181</value>
</property>

### --- 拷贝配置好的hadoop环境到其他节点

[root@linux121 ~]# rsync-script /opt/yanqi/servers/ha/hadoop-2.9.2/

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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