hadoop 新增数据节点，hbase 新增regionserver 步骤

本文详细介绍Hadoop集群的搭建过程，包括设置主机名、SSH免密登录、JDK及Hadoop安装步骤，并针对HDFS和YARN配置进行了具体说明。此外还介绍了HBase的安装配置方法。

1、设置主机名

sudo vi /etc/sysconfig/network

NETWORKING=yes

HOSTNAME=hadoop007

sudo hostnamectl set-hostname hadoop007

2、设置免密

生成秘钥：

ssh-keygen -t rsa

cd ~/.ssh/

cat id_rsa.pub >>authorized_keys

然后cat id_rsa.pub 内容到主节点 authorized_keys，，同时主节点的cat id_rsa.pub 到新增节点的 authorized_keys，然后分发主节点的 authorized_keys到集群的其他几台机器。

详见 xsync：集群批量同步文件命令

3、jdk 安装

一般从其他节点copy压缩包，然后解压到/opt/server/jdk1.8.0_331/

然后cd /usr/java/

sudo ln -s /opt/server/jdk1.8.0_331/ jdk1.8.0_331

设置java 环境变量 vi /etc/profile.d/java.sh

export JAVA_HOME=/usr/java/jdk1.8.0_331
export JRE_HOME=$JAVA_HOME/jre
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib

source /etc/profile 使环境变量生效

java -version

java version "1.8.0_331"
Java(TM) SE Runtime Environment (build 1.8.0_331-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.331-b09, mixed mode)

3、安装hadoop

1）从其他datanode节点copy hadoop，hbase 目录

2）配置文件修改

配置文件路径 /home/hadoop/hadoop/etc/hadoop/

hdfs-site.xml 改为硬盘比较大的分区路径

  <property>
            <name>dfs.data.dir</name>
            <value>/opt/data/hdfs/dn</value>
        </property>

yarn-site.xml 调整内存与核心数

 <property>
            <name>yarn.nodemanager.resource.memory-mb</name>
            <value>174080</value>
        </property>

        <property>
            <name>yarn.nodemanager.resource.cpu-vcores</name>
            <value>16</value>
        </property>

3)设置hadoop环境变量。

vi /etc/profile.d/hadoop.sh

# set hadoop path
export HADOOP_HOME=/home/hadoop/hadoop
export PATH=$PATH:$HADOOP_HOME/bin
export HADOOP_CONF_DIR=/home/hadoop/hadoop/etc/hadoop

# set hbase path
export HBASE_HOME=/home/hadoop/hbase
export PATH=$PATH:$HBASE_HOME/bin

# set hive path
export HIVE_HOME=/home/hadoop/hive
export PATH=$PATH:$HIVE_HOME/bin

#set sqoop path
export SQOOP_HOME=/home/hadoop/sqoop1
export PATH=$PATH:$SQOOP_HOME/bin


export SBIN_HOME=/home/hadoop/hadoop/sbin
export PATH=$PATH:$SBIN_HOME

# set mahout path
export MAHOUT_HOME=/home/hadoop/mahout
export MAHOUT_CONF_DIR=$MAHOUT_HOME/conf
export PATH=$MAHOUT_HOME/conf:$MAHOUT_HOME/bin:$PATH

# set maven path
#export M2_HOME=/home/hadoop/maven
#export PATH=$M2_HOME/bin:$PATH

# set kylin path
export KYLIN_HOME=/home/hadoop/kylin
export PATH=$KYLIN_HOME/bin:$PATH

#set java
#export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
# set history time
export HISTTIMEFORMAT="%F %T `whoami` "

4)主节点slaves 添加新增节点的主机名：hadoop007

然后分发到集群所有节点

查看进程并查看日志

4、启动hdfs yarn

./hadoop-daemon.sh start datanode
./yarn-daemon.sh start nodemanger

查看进程并查看日志

有错误日志如下：

2022-07-01 00:10:50,622 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool BP-585357159-10.0.0.153-1427075743287 (Datanode Uuid 3cb9deed-b682-41fa-b005-2ea5003a2893) service to hd.m1/10.0.0.123:8020 Datanode denied communication with namenode because the host is not in the include-list: DatanodeRegistration(10.0.0.154, datanodeUuid=3cb9deed-b682-41fa-b005-2ea5003a2893, infoPort=50075, ipcPort=50020, storageInfo=lv=-56;cid=CID-9bf6c3f9-da79-41f1-b511-88b6c8de3db4;nsid=119689889;c=0)
        at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager.registerDatanode(DatanodeManager.java:896)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.registerDatanode(FSNamesystem.java:4836)
        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.registerDatanode(NameNodeRpcServer.java:1038)
        at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.registerDatanode(DatanodeProtocolServerSideTranslatorPB.java:92)
        at org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:26378)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:587)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1026)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2013)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2009)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1642)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2007)