hadoop http address绑定内网地址

hadoop默认配置里http address接口domain段均为0.0.0.0，表示可通过任一网卡访问http接口，对于双网卡服务器(一个内网，一个外网)，意味着公网用户可以随意访问hadoop系统开放的web资源，存在极大的安全隐患。
我们可以修改配置将domain段替换成内网IP，这对于dfs.http.address、mapred.job.tracker.http.address没什么问题，但dfs.datanode.http.address需要到每个datanode上去修改，这太不现实了，可以通过以下方法实现自动配置。
通过local.bind.address参数 为http address绑定内网IP：
1、修改$HADOOP_HOME/conf/hadoop-env.sh

#bind_ip=$(/sbin/ifconfig eth1:0 | grep 'inet addr:' | cut -d: -f2 | awk '{print $1}')
#replace eth1:0 with your NIC / alias  这种方式需要所有机器内外网对应的网卡顺序一致
#bind_ip=$(/sbin/ifconfig | fgrep 'inet addr:172.16' | cut -d: -f2 | awk '{print $1}')
#这种方式需要所有机器内网IP前缀一致
bind_ip=$(/bin/hostname)
#这种方式需要在/etc/hosts里将hostname指向内网IP
export BIND_OPTS="-Dlocal.bind.address=${bind_ip}"
# Command specific options appended to HADOOP_OPTS when specified
export HADOOP_NAMENODE_OPTS="-Dcom.sun.management.jmxremote $HADOOP_NAMENODE_OPTS $BIND_OPTS"
export HADOOP_SECONDARYNAMENODE_OPTS="-Dcom.sun.management.jmxremote $HADOOP_SECONDARYNAMENODE_OPTS $BIND_OPTS"
export HADOOP_DATANODE_OPTS="-Dcom.sun.management.jmxremote $HADOOP_DATANODE_OPTS $BIND_OPTS"
export HADOOP_BALANCER_OPTS="-Dcom.sun.management.jmxremote $HADOOP_BALANCER_OPTS $BIND_OPTS" 
export HADOOP_JOBTRACKER_OPTS="-Dcom.sun.management.jmxremote $HADOOP_JOBTRACKER_OPTS $BIND_OPTS"
export HADOOP_TASKTRACKER_OPTS="-Dcom.sun.management.jmxremote $HADOOP_TASKTRACKER_OPTS $BIND_OPTS"

2、修改$HADOOP_HOME/conf/hdfs-site.xml

<property>
<property>
     <name>dfs.http.address</name>
     <value>${local.bind.address}:50070</value>
</property>
<property>
     <name>dfs.https.address</name>
     <value>${local.bind.address}:50470</value>
</property>
<property>
     <name>dfs.secondary.http.address</name>
     <value>${local.bind.address}:50090</value>
</property>
<property>
     <name>dfs.datanode.address</name>
     <value>${local.bind.address}:50010</value>
</property>
<property>
     <name>dfs.datanode.ipc.address</name>
     <value>${local.bind.address}:50020</value>
</property>
<property>
     <name>dfs.datanode.http.address</name>
     <value>${local.bind.address}:50075</value>
</property>
<property>
     <name>dfs.datanode.https.address</name>
     <value>${local.bind.address}:50475</value>
</property>

3、修改$HADOOP_HOME/conf/mapred-site.xml

<property>
     <name>mapred.job.tracker.http.address</name>
     <value>${local.bind.address}:50030</value>
</property>
<property>
     <name>mapred.task.tracker.http.address</name>
     <value>${local.bind.address}:50060</value>
</property>

4、重启

$HADOOP_HOME/bin/stop-all.sh
$HADOOP_HOME/bin/start-all.sh