HDFS 구성에 대하여

Hadoop 구성하기 위해 NameNode 이중화 구성, 네트워크에 따른 구성 등을 고려할 필요가 있다.

참조 : https://www.popit.kr/hadoop-namenode-%EC%9D%B4%EC%A4%91%ED%99%94-%EC%8B%9C-fencing-%EC%97%AD%ED%95%A0/

별도의 DNS 서버를 두지 않으므로, /etc/hosts 에 내부 대역 IP와 FQDN 을 작성
DataNode 에는 JBOD 파일 포맷을 지정
=zookeeper는 master01, master02, master03 NameNode 에 설치
hdfs-site.xml 에서 dfs.namenode.rpc-bind-host, dfs.namenode.http-address, dfs.namenode.https-address, dfs.datanode.http.address, dfs.datanode.https.address, dfs.datanode.address, dfs.datanode.ipc.address 를 0.0.0.0 으로 둬서 외부 서비스 대응

아래는 core-site.xml 과 hdfs-site.xml 이다.

<?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>dfs.client.failover.proxy.provider.clustername</name>
        <value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
    </property>
    <property>
        <name>ha.zookeeper.quorum</name>
        <value>master01:2181,master02:2181,master03:2181</value>
    </property>
    <property>
        <name>dfs.namenode.name.dir</name>
        <value>/hadoop/nn</value>
    </property>
    <property>
        <name>dfs.datanode.data.dir</name>
        <value>/data01/dfs/dn,/data02/dfs/dn,/data03/dfs/dn,/data04/dfs/dn,/data05/dfs/dn,/data06/dfs/dn</value>
    </property>
    <property>
        <name>dfs.journalnode.edits.dir</name>
        <value>/hadoop/jn</value>
    </property>
    <property>
        <name>dfs.nameservices</name>
        <value>clustername</value>
    </property>
    <property>
        <name>dfs.ha.namenodes.clustername</name>
        <value>namenode148,namenode192</value>
    </property>
    <property>
        <name>dfs.namenode.rpc-bind-host</name>
        <value>0.0.0.0</value>
    </property>
    <property>
        <name>dfs.namenode.rpc-address.clustername.namenode148</name>
        <value>master01:8020</value>
    </property>
    <property>
        <name>dfs.namenode.servicerpc-address.clustername.namenode148</name>
        <value>master01:8022</value>
    </property>
    <property>
        <name>dfs.namenode.http-address.clustername.namenode148</name>
        <value>0.0.0.0:9870</value>
    </property>
    <property>
        <name>dfs.namenode.https-address.clustername.namenode148</name>
        <value>0.0.0.0:9871</value>
    </property>
    <property>
        <name>dfs.namenode.rpc-address.clustername.namenode192</name>
        <value>master01:8020</value>
    </property>
    <property>
        <name>dfs.namenode.servicerpc-address.clustername.namenode192</name>
        <value>master02:8022</value>
    </property>
    <property>
        <name>dfs.namenode.http-address.clustername.namenode192</name>
        <value>0.0.0.0:9870</value>
    </property>
    <property>
        <name>dfs.namenode.https-address.clustername.namenode192</name>
        <value>0.0.0.0:9871</value>
    </property>
    <property>
        <name>dfs.namenode.shared.edits.dir</name>
        <value>qjournal://master01:8485;master02:8485;master03/clustername</value>
    </property>
    <property>
        <name>dfs.ha.automatic-failover.enabled</name>
        <value>true</value>
    </property>
    <property>
        <name>dfs.ha.fencing.methods</name>
        <value>sshfence(user:22)</value>
    </property>
    <property>
        <name>dfs.ha.fencing.ssh.private-key-files</name>
        <value>/home/user/.ssh/id_rsa</value>
    </property>
    <property>
        <name>dfs.replication</name>
        <value>3</value>
    </property>
    <property>
        <name>dfs.datanode.http.address</name>
        <value>0.0.0.0:9864</value>
    </property>
    <property>
        <name>dfs.datanode.https.address</name>
        <value>0.0.0.0:9865</value>
    </property>
    <property>
        <name>dfs.datanode.address</name>
        <value>0.0.0.0:9866</value>
    </property>
    <property>
        <name>dfs.datanode.ipc.address</name>
        <value>0.0.0.0:9867</value>
    </property>
    <property>
        <name>dfs.client.use.datanode.hostname</name>
        <value>true</value>
    </property>
    <property>
        <name>dfs.webhdfs.enabled</name>
        <value>true</value>
    </property>
</configuration>

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