CentOS 搭建 Hadoop3 高可用集群

李昊哲小课2023-11-02 11:25

Hadoop FullyDistributed Mode 完全分布式

spark101 spark102 spark103
192.168.171.101 192.168.171.102 192.168.171.103
namenode namenode
journalnode journalnode journalnode
datanode datanode datanode
nodemanager nodemanager nodemanager
recource manager recource manager
job history
job log job log job log

1. 准备

1.1 升级操作系统和软件

bash 复制代码 
yum -y update

升级后建议重启

1.2 安装常用软件

bash 复制代码 
yum -y install gcc gcc-c++ autoconf automake cmake make rsync vim man zip unzip net-tools zlib zlib-devel openssl openssl-devel pcre-devel tcpdump lrzsz tar wget openssh-server

1.3 修改主机名

bash 复制代码 
hostnamectl set-hostname spark01
bash 复制代码 
hostnamectl set-hostname spark02
bash 复制代码 
hostnamectl set-hostname spark03

1.4 修改IP地址

bash 复制代码 
vim /etc/sysconfig/network-scripts/ifcfg-ens160

网卡 配置文件示例

TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="none"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens32"
DEVICE="ens32"
ONBOOT="yes"
IPADDR="192.168.171.101"
PREFIX="24"
GATEWAY="192.168.171.2"
DNS1="192.168.171.2"
IPV6_PRIVACY="no"

1.5 关闭防火墙

bash 复制代码 
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/configsetenforce 0
systemctl stop firewalld
systemctl disable firewalld

1.6 修改hosts配置文件

bash 复制代码 
vim /etc/hosts

修改内容如下：

bash 复制代码 
192.168.171.101	spark01
192.168.171.102	spark02
192.168.171.103	spark03

1.7 上传软件配置环境变量

在所有主机节点创建软件目录

bash 复制代码 
mkdir -p /opt/soft

以下操作在 hadoop101 主机上完成
进入软件目录

bash 复制代码 
cd /opt/soft

下载 JDK

bash 复制代码 
wget https://download.oracle.com/otn/java/jdk/8u391-b13/b291ca3e0c8548b5a51d5a5f50063037/jdk-8u391-linux-x64.tar.gz?AuthParam=1698206552_11c0bb831efdf87adfd187b0e4ccf970

下载 zookeeper

bash 复制代码 
wget https://dlcdn.apache.org/zookeeper/zookeeper-3.8.3/apache-zookeeper-3.8.3-bin.tar.gz

下载 hadoop

bash 复制代码 
wget https://dlcdn.apache.org/hadoop/common/hadoop-3.3.5/hadoop-3.3.5.tar.gz

解压 JDK 修改名称

解压 zookeeper 修改名称

解压 hadoop 修改名称

bash 复制代码 
tar -zxvf jdk-8u391-linux-x64.tar.gz -C /opt/soft/
mv jdk1.8.0_391/ jdk-8
tar -zxvf apache-zookeeper-3.8.3-bin.tar.gz
mv apache-zookeeper-3.8.3-bin zookeeper-3
tar -zxvf hadoop-3.3.5.tar.gz -C /opt/soft/
mv hadoop-3.3.5/ hadoop-3

配置环境变量

bash 复制代码 
vim /etc/profile.d/my_env.sh

编写以下内容：

bash 复制代码 
export JAVA_HOME=/opt/soft/jdk-8
export set JAVA_OPTS="--add-opens java.base/java.lang=ALL-UNNAMED"

export ZOOKEEPER_HOME=/opt/soft/zookeeper-3

export HDFS_NAMENODE_USER=root
export HDFS_SECONDARYNAMENODE_USER=root
export HDFS_DATANODE_USER=root
export HDFS_ZKFC_USER=root
export HDFS_JOURNALNODE_USER=root

export YARN_RESOURCEMANAGER_USER=root
export YARN_NODEMANAGER_USER=root

export HADOOP_HOME=/opt/soft/hadoop-3
export HADOOP_INSTALL=$HADOOP_HOME
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop

export PATH=$PATH:$JAVA_HOME/bin:$ZOOKEEPER_HOME/bin:$HADOOP_HOME/bin:$HADOOP_HOME/sbin

生成新的环境变量

注意：分发软件和配置文件后 在所有主机执行该步骤

bash 复制代码 
source /etc/profile

2. zookeeper

2.1 编辑配置文件

bash 复制代码 
cd $ZOOKEEPER_HOME/conf
bash 复制代码 
vim zoo.cfg
bash 复制代码 
# 心跳单位，2s
tickTime=2000
# zookeeper-3初始化的同步超时时间，10个心跳单位，也即20s
initLimit=10
# 普通同步：发送一个请求并得到响应的超时时间，5个心跳单位也即10s
syncLimit=5
# 内存快照数据的存储位置
dataDir=/home/zookeeper-3/data
# 事务日志的存储位置
dataLogDir=/home/zookeeper-3/datalog
# 当前zookeeper-3节点的端口 
clientPort=2181
# 单个客户端到集群中单个节点的并发连接数，通过ip判断是否同一个客户端，默认60
maxClientCnxns=1000
# 保留7个内存快照文件在dataDir中，默认保留3个
autopurge.snapRetainCount=7
# 清除快照的定时任务，默认1小时，如果设置为0，标识关闭清除任务
autopurge.purgeInterval=1
#允许客户端连接设置的最小超时时间，默认2个心跳单位
minSessionTimeout=4000
#允许客户端连接设置的最大超时时间，默认是20个心跳单位，也即40s，
maxSessionTimeout=300000
#zookeeper-3 3.5.5启动默认会把AdminService服务启动，这个服务默认是8080端口
admin.serverPort=9001
#集群地址配置
server.1=spark01:2888:3888
server.2=spark02:2888:3888
server.3=spark03:2888:3888
bash 复制代码 
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/home/zookeeper-3/data
dataLogDir=/home/zookeeper-3/datalog 
clientPort=2181
maxClientCnxns=1000
autopurge.snapRetainCount=7
autopurge.purgeInterval=1
minSessionTimeout=4000
maxSessionTimeout=300000
admin.serverPort=9001
server.1=spark01:2888:3888
server.2=spark02:2888:3888
server.3=spark03:2888:3888

2.2 保存后根据配置文件创建目录

在每台服务器上执行

bash 复制代码 
mkdir -p /home/zookeeper-3/data
mkdir -p /home/zookeeper-3/datalog

2.3 myid

spark01

bash 复制代码 
echo 1 > /home/zookeeper-3/data/myid
more /home/zookeeper-3/data/myid

spark02

bash 复制代码 
echo 2 > /home/zookeeper-3/data/myid
more /home/zookeeper-3/data/myid

spark03

bash 复制代码 
echo 3 > /home/zookeeper-3/data/myid
more /home/zookeeper-3/data/myid

2.4 编写zookeeper-3开机启动脚本

在/etc/systemd/system/文件夹下创建一个启动脚本zookeeper-3.service

注意：在每台服务器上编写

bash 复制代码 
cd /etc/systemd/system
vim zookeeper.service

内容如下：

bash 复制代码 
[Unit]
Description=zookeeper
After=syslog.target network.target

[Service]
Type=forking
# 指定zookeeper-3 日志文件路径，也可以在zkServer.sh 中定义
Environment=ZOO_LOG_DIR=/home/zookeeper-3/datalog
# 指定JDK路径，也可以在zkServer.sh 中定义
Environment=JAVA_HOME=/opt/soft/jdk-8
ExecStart=/opt/soft/zookeeper-3/bin/zkServer.sh start
ExecStop=/opt/soft/zookeeper-3/bin/zkServer.sh stop
Restart=always
User=root
Group=root

[Install]
WantedBy=multi-user.target
bash 复制代码 
[Unit]
Description=zookeeper
After=syslog.target network.target

[Service]
Type=forking
Environment=ZOO_LOG_DIR=/home/zookeeper-3/datalog
Environment=JAVA_HOME=/opt/soft/jdk-8
ExecStart=/opt/soft/zookeeper-3/bin/zkServer.sh start
ExecStop=/opt/soft/zookeeper-3/bin/zkServer.sh stop
Restart=always
User=root
Group=root

[Install]
WantedBy=multi-user.target
bash 复制代码 
systemctl daemon-reload
# 等所有主机配置好后再执行以下命令
systemctl start zookeeper
systemctl enable zookeeper
systemctl status zookeeper

3. hadoop

修改配置文件

bash 复制代码 
cd  $HADOOP_HOME/etc/hadoop
  • hadoop-env.sh
  • core-site.xml
  • hdfs-site.xml
  • workers
  • mapred-site.xml
  • yarn-site.xml

hadoop-env.sh 文件末尾追加

bash 复制代码 
export JAVA_HOME=/opt/soft/jdk-8
export HADOOP_OPTS="--add-opens java.base/java.lang=ALL-UNNAMED"

export HDFS_NAMENODE_USER=root
export HDFS_SECONDARYNAMENODE_USER=root
export HDFS_DATANODE_USER=root
export HDFS_ZKFC_USER=root
export HDFS_JOURNALNODE_USER=root

export YARN_RESOURCEMANAGER_USER=root
export YARN_NODEMANAGER_USER=root

core-site.xml

xml 复制代码 
<?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://lihaozhe</value>
    </property>
    <property>
        <name>hadoop.tmp.dir</name>
        <value>/home/hadoop/data</value>
    </property>
     <property>
       <name>ha.zookeeper.quorum</name>
       <value>spark01:2181,spark02:2181,spark03:2181</value>
    </property>
    <property>
        <name>hadoop.http.staticuser.user</name>
        <value>root</value>
    </property>
    <property>
        <name>dfs.permissions.enabled</name>
        <value>false</value>
    </property>
    <property>
        <name>hadoop.proxyuser.root.hosts</name>
        <value>*</value>
    </property>
    <property>
        <name>hadoop.proxyuser.root.groups</name>
        <value>*</value>
    </property>
</configuration>

hdfs-site.xml

xml 复制代码 
<?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.nameservices</name>
		<value>lihaozhe</value>
    </property>
    <property>
		<name>dfs.ha.namenodes.lihaozhe</name>
		<value>nn1,nn2</value>
    </property>
    <property>
		<name>dfs.namenode.rpc-address.lihaozhe.nn1</name>
		<value>spark01:8020</value>
    </property>
    <property>
		<name>dfs.namenode.rpc-address.lihaozhe.nn2</name>
		<value>spark02:8020</value>
    </property>
    <property>
		<name>dfs.namenode.http-address.lihaozhe.nn1</name>
		<value>spark01:9870</value>
    </property>
    <property>
		<name>dfs.namenode.http-address.lihaozhe.nn2</name>
		<value>spark02:9870</value>
    </property>
    <property>
		<name>dfs.namenode.shared.edits.dir</name>
		<value>qjournal://spark01:8485;spark02:8485;spark03:8485/lihaozhe</value>
    </property>
    <property>
		<name>dfs.client.failover.proxy.provider.lihaozhe</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>/home/hadoop/journalnode/data</value>
    </property>
    <property>
       <name>dfs.ha.automatic-failover.enabled</name>
       <value>true</value>
     </property>
    <property>
      <name>dfs.safemode.threshold.pct</name>
      <value>1</value>
    </property>
</configuration>

workers

bash 复制代码 
spark01
spark02
spark03

mapred-site.xml

xml 复制代码 
<?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>
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>
    <property>
        <name>mapreduce.application.classpath</name>
            <value>$HADOOP_MAPRED_HOME/share/hadoop/mapreduce/*:$HADOOP_MAPRED_HOME/share/hadoop/mapreduce/lib/*</value>
    </property>
	<!-- yarn历史服务端口 -->
    <property>
        <name>mapreduce.jobhistory.address</name>
        <value>spark01:10020</value>
    </property>
    <!-- yarn历史服务web访问端口 -->
    <property>
        <name>mapreduce.jobhistory.webapp.address</name>
        <value>hadoop102:19888</value>
    </property>
</configuration>

yarn-site.xml

xml 复制代码 
<?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>

    <!-- Site specific YARN configuration properties -->
    <property>
		<name>yarn.resourcemanager.ha.enabled</name>
		<value>true</value>
    </property>
    <property>
		<name>yarn.resourcemanager.cluster-id</name>
		<value>cluster1</value>
    </property>
    <property>
		<name>yarn.resourcemanager.ha.rm-ids</name>
		<value>rm1,rm2</value>
    </property>
    <property>
		<name>yarn.resourcemanager.hostname.rm1</name>
		<value>spark01</value>
    </property>
    <property>
		<name>yarn.resourcemanager.hostname.rm2</name>
		<value>spark02</value>
    </property>
    <property>
		<name>yarn.resourcemanager.webapp.address.rm1</name>
		<value>spark01:8088</value>
    </property>
    <property>
		<name>yarn.resourcemanager.webapp.address.rm2</name>
		<value>spark02:8088</value>
    </property>
    <property>
		<name>yarn.resourcemanager.zk-address</name>
		<value>spark01:2181,spark02:2181,spark03:2181</value>
    </property>
    <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>
    <property>
        <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
		<value>org.apache.hadoop.mapred.ShuffleHandler</value>
    </property>
    <property>
		<name>yarn.nodemanager.env-whitelist</name>
		<value>JAVA_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,HADOOP_CONF_DIR,CLASSPATH_PREPEND_DISTCACHE,HADOOP_YARN_HOME,HADOOP_MAPRED_HOME</value>
    </property>
    <!-- 是否将对容器实施物理内存限制 -->
    <property>
		<name>yarn.nodemanager.pmem-check-enabled</name>
		<value>false</value>
    </property>

    <!-- 是否将对容器实施虚拟内存限制。 -->
    <property>
		<name>yarn.nodemanager.vmem-check-enabled</name>
		<value>false</value>
    </property>
    <!-- 开启日志聚集 -->
    <property>
		<name>yarn.log-aggregation-enable</name>
		<value>true</value>
    </property>

    <!-- 设置yarn历史服务器地址 -->
    <property>
		<name>yarn.log.server.url</name>
		<value>http://spark01:19888/jobhistory/logs</value>
    </property>

    <!-- 保存的时间7天 -->
    <property>
		<name>yarn.log-aggregation.retain-seconds</name>
		<value>604800</value>
    </property>
</configuration>

4. 配置ssh免密钥登录

创建本地秘钥并将公共秘钥写入认证文件

bash 复制代码 
ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
bash 复制代码 
ssh-copy-id root@spark01
bash 复制代码 
ssh-copy-id root@spark02
bash 复制代码 
ssh-copy-id root@spark03
bash 复制代码 
ssh root@spark01
exit
bash 复制代码 
ssh root@spark02
exit
bash 复制代码 
ssh root@spark03
exit

5. 分发软件和配置文件

bash 复制代码 
scp -r /etc/profile.d root@spark02:/etc
scp -r /etc/profile.d root@spark03:/etc
scp -r /opt/soft/zookeeper-3 root@spark02:/opt/soft
scp -r /opt/soft/zookeeper-3 root@spark03:/opt/soft
scp -r /opt/soft/hadoop-3/etc/hadoop/* root@spark02:/opt/soft/hadoop-3/etc/hadoop/
scp -r /opt/soft/hadoop-3/etc/hadoop/* root@spark03:/opt/soft/hadoop-3/etc/hadoop/

6. 在各服务器上使环境变量生效

bash 复制代码 
source /etc/profile

7. 启动zookeeper

7.1 myid

spark01

bash 复制代码 
echo 1 > /home/zookeeper-3/data/myid
more /home/zookeeper-3/data/myid

spark02

bash 复制代码 
echo 2 > /home/zookeeper-3/data/myid
more /home/zookeeper-3/data/myid

spark03

bash 复制代码 
echo 3 > /home/zookeeper-3/data/myid
more /home/zookeeper-3/data/myid

7.2 启动服务

在各节点执行以下命令

bash 复制代码 
systemctl daemon-reload
systemctl start zookeeper
systemctl enable zookeeper
systemctl status zookeeper

7.3 验证

bash 复制代码 
jps
bash 复制代码 
zkServer.sh status

8. Hadoop初始化

bash 复制代码 
1.	启动三个zookeeper：zkServer.sh start
2.	启动三个JournalNode：hadoop-daemon.sh start journalnode 或者 hdfs --daemon start journalnode
7.	在其中一个namenode上格式化：hdfs namenode -format
8.	把刚刚格式化之后的元数据拷贝到另外一个namenode上
    a)	启动刚刚格式化的namenode :hadoop-daemon.sh start namenode
    b)	在没有格式化的namenode上执行：hdfs namenode -bootstrapStandby
    c)	启动第二个namenode: hadoop-daemon.sh start namenode
9.	在其中一个namenode上初始化hdfs zkfc -formatZK
10.	停止上面节点：stop-dfs.sh
11.	全面启动：start-all.sh
12. 启动resourcemanager节点 yarn-daemon.sh start resourcemanager
start-yarn.sh

http://dl.bintray.com/sequenceiq/sequenceiq-bin/hadoop-native-64-2.5.0.tar

高版本不需要执行第 12 步

13. 启动历史服务
mapred --daemon start historyserver
14 15 16 不需要执行
14、安全模式

hdfs dfsadmin -safemode enter  
hdfs dfsadmin -safemode leave


15、查看哪些节点是namenodes并获取其状态
hdfs getconf -namenodes
hdfs haadmin -getServiceState spark01

16、强制切换状态
hdfs haadmin -transitionToActive --forcemanual spark01

重点提示：

bash 复制代码 
# 关机之前 依关闭服务
stop-yarn.sh
stop-dfs.sh
# 开机后 依次开启服务
start-dfs.sh
start-yarn.sh

或者

bash 复制代码 
# 关机之前关闭服务
stop-all.sh
# 开机后开启服务
start-all.sh
bash 复制代码 
#jps 检查进程正常后开启胡哦关闭在再做其它操作

9. 修改windows下hosts文件

C:\Windows\System32\drivers\etc\hosts

追加以下内容：

bash 复制代码 
192.168.171.101	hadoop101
192.168.171.102	hadoop102
192.168.171.103	hadoop103

Windows11 注意 修改权限

  1. 开始搜索 cmd

    找到命令头提示符 以管理身份运行

  2. 进入 C:\Windows\System32\drivers\etc 目录

    cmd 复制代码 
    cd drivers/etc

  3. 去掉 hosts文件只读属性

    cmd 复制代码 
    attrib -r hosts

  4. 打开 hosts 配置文件

    cmd 复制代码 
    start hosts

  5. 追加以下内容后保存

    bash 复制代码 
    192.168.171.101	spark01
192.168.171.102	spark02
192.168.171.103	spark03

10. 测试

12.1 浏览器访问hadoop集群

浏览器访问: http://spark01:9870

浏览器访问:http://spark01:8088

浏览器访问:http://spark01:19888/

12.2 测试 hdfs

本地文件系统创建 测试文件 wcdata.txt

bash 复制代码 
vim wcdata.txt
bash 复制代码 
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive
FlinkHBase Flink
Hive StormHive Flink HadoopHBase
HiveHadoop Spark HBase StormHBase
Hadoop Hive FlinkHBase Flink Hive StormHive
Flink HadoopHBase Hive
Spark HBaseHive Flink
Storm Hadoop HBase SparkFlinkHBase
StormHBase Hadoop Hive

在 HDFS 上创建目录 /wordcount/input

bash 复制代码 
hdfs dfs -mkdir -p /wordcount/input

查看 HDFS 目录结构

bash 复制代码 
hdfs dfs -ls /
bash 复制代码 
hdfs dfs -ls /wordcount
bash 复制代码 
hdfs dfs -ls /wordcount/input

上传本地测试文件 wcdata.txt 到 HDFS 上 /wordcount/input

bash 复制代码 
hdfs dfs -put wcdata.txt /wordcount/input

检查文件是否上传成功

bash 复制代码 
hdfs dfs -ls /wordcount/input
bas 复制代码 
hdfs dfs -cat /wordcount/input/wcdata.txt

12.2 测试 mapreduce

计算 PI 的值

bash 复制代码 
hadoop jar $HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.3.5.jar pi 10 10

单词统计

bash 复制代码 
hadoop jar $HADOOP_HOME/share/hadoop/mapreduce/hadoop-mapreduce-examples-3.3.5.jar wordcount /wordcount/input/wcdata.txt /wordcount/result
bash 复制代码 
hdfs dfs -ls /wordcount/result
bash 复制代码 
hdfs dfs -cat /wordcount/result/part-r-00000

11. 元数据

hadoop101

bash 复制代码 
cd /home/hadoop_data/dfs/name/current
bash 复制代码 
ls

看到如下内容:

bash 复制代码 
edits_0000000000000000001-0000000000000000009  edits_inprogress_0000000000000000299  fsimage_0000000000000000298      VERSION
edits_0000000000000000010-0000000000000000011  fsimage_0000000000000000011           fsimage_0000000000000000298.md5
edits_0000000000000000012-0000000000000000298  fsimage_0000000000000000011.md5       seen_txid

查看fsimage

bash 复制代码 
hdfs oiv -p XML -i fsimage_0000000000000000011

将元数据内容按照指定格式读取后写入到新文件中

bash 复制代码 
hdfs oiv -p XML -i fsimage_0000000000000000011 -o /opt/soft/fsimage.xml

查看edits
将元数据内容按照指定格式读取后写入到新文件中

bash 复制代码 
hdfs oev -p XML -i edits_inprogress_0000000000000000299  -o /opt/soft/edit.xml
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