（02）Hadoop环境的搭建（伪分布模式）

[root@localhost src]# tar -zxvf hadoop-2.4.1.tar.gz -C /usr/local/

[root@localhost src]# vim /etc/profile

export HADOOP_HOME=/usr/local/hadoop-2.4.1
export PATH=$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH

[root@localhost src]# source /etc/profile

[root@localhost hadoop]# vim /usr/local/hadoop-2.4.1/etc/hadoop/hadoop-env.sh

[root@localhost hadoop]# vim /usr/local/hadoop-2.4.1/etc/hadoop/hdfs-site.xml 

<property>
        <name>dfs.replication</name>
        <value>1</value>
</property>
<property>
        <name>dfs.permissions</name>
        <value>false</value>
</property>

[root@localhost hadoop]# vim /usr/local/hadoop-2.4.1/etc/hadoop/core-site.xml 

<property>
    <name>fs.defaultFS</name>
    <value>hdfs://192.168.7.151:9000</value>
</property>
<property>
    <name>hadoop.tmp.dir</name>
    <value>/usr/local/hadoop-2.4.1/tmp</value>
</property>

[root@localhost hadoop]# mkdir /usr/local/hadoop-2.4.1/tmp

[root@localhost hadoop]# vim /usr/local/hadoop-2.4.1/etc/hadoop/mapred-site.xml

<property>
    <name>mapreduce.framework.name</name>
    <value>yarn</value>
</property>

[root@localhost hadoop]# vim /usr/local/hadoop-2.4.1/etc/hadoop/yarn-site.xml

<property>
    <name>yarn.resourcemanager.hostname</name>
    <value>192.168.7.151</value>
</property>
<property>
    <name>yarn.nodemanager.aux-services</name>
    <value>mapreduce_shuffle</value>
</property>

[root@localhost hadoop-2.4.1]# hdfs namenode -format

[root@localhost hadoop-2.4.1]# start-all.sh

[root@localhost hadoop-2.4.1]# start-all.sh 
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop-2.4.1/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
It‘s highly recommended that you fix the library with ‘execstack -c <libfile>‘, or link it with ‘-z noexecstack‘.
20/02/10 11:46:36 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [192.168.7.151]
The authenticity of host ‘192.168.7.151 (192.168.7.151)‘ can‘t be established.
ECDSA key fingerprint is SHA256:vfvHgc0RFlOQtUhI3pdFozBK3iehM6/GmwsFaXaYMyo.
ECDSA key fingerprint is MD5:aa:63:31:82:31:04:51:35:d5:4d:46:36:59:21:b2:0d.
Are you sure you want to continue connecting (yes/no)? yes
192.168.7.151: Warning: Permanently added ‘192.168.7.151‘ (ECDSA) to the list of known hosts.
root@192.168.7.151‘s password: 
192.168.7.151: starting namenode, logging to /usr/local/hadoop-2.4.1/logs/hadoop-root-namenode-localhost.localdomain.out
192.168.7.151: Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop-2.4.1/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
192.168.7.151: It‘s highly recommended that you fix the library with ‘execstack -c <libfile>‘, or link it with ‘-z noexecstack‘.
The authenticity of host ‘localhost (::1)‘ can‘t be established.
ECDSA key fingerprint is SHA256:vfvHgc0RFlOQtUhI3pdFozBK3iehM6/GmwsFaXaYMyo.
ECDSA key fingerprint is MD5:aa:63:31:82:31:04:51:35:d5:4d:46:36:59:21:b2:0d.
Are you sure you want to continue connecting (yes/no)? yes
localhost: Warning: Permanently added ‘localhost‘ (ECDSA) to the list of known hosts.
root@localhost‘s password: 
localhost: starting datanode, logging to /usr/local/hadoop-2.4.1/logs/hadoop-root-datanode-localhost.localdomain.out
Starting secondary namenodes [0.0.0.0]
The authenticity of host ‘0.0.0.0 (0.0.0.0)‘ can‘t be established.
ECDSA key fingerprint is SHA256:vfvHgc0RFlOQtUhI3pdFozBK3iehM6/GmwsFaXaYMyo.
ECDSA key fingerprint is MD5:aa:63:31:82:31:04:51:35:d5:4d:46:36:59:21:b2:0d.
Are you sure you want to continue connecting (yes/no)? yes
0.0.0.0: Warning: Permanently added ‘0.0.0.0‘ (ECDSA) to the list of known hosts.
root@0.0.0.0‘s password: 
0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop-2.4.1/logs/hadoop-root-secondarynamenode-localhost.localdomain.out
0.0.0.0: Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop-2.4.1/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
0.0.0.0: It‘s highly recommended that you fix the library with ‘execstack -c <libfile>‘, or link it with ‘-z noexecstack‘.
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop-2.4.1/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
It‘s highly recommended that you fix the library with ‘execstack -c <libfile>‘, or link it with ‘-z noexecstack‘.
20/02/10 11:47:53 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
starting yarn daemons
starting resourcemanager, logging to /usr/local/hadoop-2.4.1/logs/yarn-root-resourcemanager-localhost.localdomain.out
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop-2.4.1/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
It‘s highly recommended that you fix the library with ‘execstack -c <libfile>‘, or link it with ‘-z noexecstack‘.
root@localhost‘s password: 
localhost: starting nodemanager, logging to /usr/local/hadoop-2.4.1/logs/yarn-root-nodemanager-localhost.localdomain.out
localhost: Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /usr/local/hadoop-2.4.1/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
localhost: It‘s highly recommended that you fix the library with ‘execstack -c <libfile>‘, or link it with ‘-z noexecstack‘.