hadoop中secondarynamenode节点添加方法

超、凢脫俗 2022-08-06 01:29 222阅读 0赞

当时，hadoop已经安装成功，但是secondarynamenode没有启动

后来经过研究，原来是配置的目录有问题

首先修改一下shell文件

文件路径：/home/work/hadoop/bin

原来：master  现在：secondarynamenode

停止的shell文件也要修改：

原来：master  现在：secondarynamenode

\[work@master bin\]$ cat start-dfs.sh  
\#!/usr/bin/env bash  
  
  
\# Licensed to the Apache Software Foundation (ASF) under one or more  
\# contributor license agreements.  See the NOTICE file distributed with  
\# this work for additional information regarding copyright ownership.  
\# The ASF licenses this file to You 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.  
  
  
  
  
\# Start hadoop dfs daemons.  
\# Optinally upgrade or rollback dfs state.  
\# Run this on master node.  
  
  
usage="Usage: start-dfs.sh \[-upgrade|-rollback\]"  
  
  
bin=\`dirname "$0"\`  
bin=\`cd "$bin"; pwd\`  
  
  
if \[ -e "$bin/../libexec/hadoop-config.sh" \]; then  
  . "$bin"/../libexec/hadoop-config.sh  
else  
  . "$bin/hadoop-config.sh"  
fi  
  
  
\# get arguments  
if \[ $\# -ge 1 \]; then  
nameStartOpt=$1  
shift  
case $nameStartOpt in  
 (-upgrade)  
 ;;  
 (-rollback)   
 dataStartOpt=$nameStartOpt  
 ;;  
 (\*)  
 echo $usage  
 exit 1  
   ;;  
esac  
fi  
  
  
\# start dfs daemons  
\# start namenode after datanodes, to minimize time namenode is up w/o data  
\# note: datanodes will log connection errors until namenode starts  
"$bin"/hadoop-daemon.sh --config $HADOOP\_CONF\_DIR start namenode $nameStartOpt  
"$bin"/hadoop-daemons.sh --config $HADOOP\_CONF\_DIR start datanode $dataStartOpt  
"$bin"/hadoop-daemons.sh --config $HADOOP\_CONF\_DIR --hosts secondarynamenode start secondarynamenode  
\[work@master bin\]$ cat stop-dfs.sh  
\#!/usr/bin/env bash  
  
  
\# Licensed to the Apache Software Foundation (ASF) under one or more  
\# contributor license agreements.  See the NOTICE file distributed with  
\# this work for additional information regarding copyright ownership.  
\# The ASF licenses this file to You 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.  
  
  
  
  
\# Stop hadoop DFS daemons.  Run this on master node.  
  
  
bin=\`dirname "$0"\`  
bin=\`cd "$bin"; pwd\`  
  
  
if \[ -e "$bin/../libexec/hadoop-config.sh" \]; then  
  . "$bin"/../libexec/hadoop-config.sh  
else  
  . "$bin/hadoop-config.sh"  
fi  
  
  
"$bin"/hadoop-daemon.sh --config $HADOOP\_CONF\_DIR stop namenode  
"$bin"/hadoop-daemons.sh --config $HADOOP\_CONF\_DIR stop datanode  
"$bin"/hadoop-daemons.sh --config $HADOOP\_CONF\_DIR --hosts  secondarynamenode stop secondarynamenode  
  
  
\[work@master bin\]$

第二点修改文件内容

文件路径：/home/work/hadoop/conf

从节点原来是：slaves里面有node1节点

修改后为只有node2和node3.

\[work@master conf\]$ cat slaves  
node2  
node3  
\[work@master conf\]$

另外在追加一个secondarynamenode文件

里面单独放node1

\[work@master conf\]$ cat secondarynamenode  
node1  
\[work@master conf\]$

到此位置：secondarynamenode配置成功。

现在我把成功后运行的结果状态贴一下：

首先我是1个master，secondarynamenode是node1, node2和node3是datanode。

master情况：