=================== ===============================
----------------hadoop集群搭建 -----------------------
====================== ===========================
192.168.75.7 255.255.255.0 192.168.75.2
00:50:56:27:0C:F1
----------------------虚拟机基础配置 -------------------
1.编辑硬件设备，设共享目录
2-添加hosts头
--------------------hosts头-----------------------
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
----------------------------------------------------
------------------------------System eth0 网络配置 ------root---------
----------------------- VM tool 安装 -----------------root-----------
1-虚拟机/安装VMware tool、双击打开VMwareTool tar包/解压到文件系统tmp
./tmp/vmware-tools-distrib/vmware-install.pl
reboot
1.网络桥接 设置物理地址
vi /etc/sysconfig/network
2.面板删连接配置，只剩System eth0
rm -rf /etc/udev/rules.d/70-persistent-net.rules
cp /mnt/hgfs/setup/hosts /etc/hosts
reboot
vi /etc/udev/rules.d/70-persistent-net.rules
vi /etc/sysconfig/network-scripts/ifcfg-eth0 物理地址大写
-------------------------ifcfg-eth0文件---------------------
DEVICE="eth0"
BOOTPROTO=none
IPV6INIT="yes"
NM_CONTROLLED="yes"
ONBOOT="yes"
TYPE="Ethernet"
IPADDR=192.168.1.120
PREFIX=24
GATEWAY=192.168.1.1
DNS1=192.168.1.1
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
NAME="System eth0"
HWADDR=00:50:56:2A:C2:8D
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
--------------------------------------------------------
service iptables stop
chkconfig iptables off
service network restart
-------------------- jdk 安装 -----------------root-------
cp /mnt/hgfs/setup/jdk-8u211-linux-x64.rpm /opt/
rpm -ivh /mnt/hgfs/setup/jdk-8u211-linux-x64.rpm
which java
ll /usr/java/jdk1.8.0_161/bin/java Java路径：/usr/java/jdk1.8.0_161
vi /etc/profile
----------------------profile 文件---------------
export JAVA_HOME=/usr/java/jdk1.8.0_161
export JRE_HOME=$JAVA/jre
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
-----------------------------------------------
***********************卸载JDK***********************************
rpm -qa|grep jdk
---看到：jdk-1.6.0_22-fcs
rpm -e --nodeps jdk-1.6.0_22-fcs
***************************************************************
source /etc/profile
java -version
=============== Hadoop 安装 ------先root后分配权限给Hadoop =========
cp /mnt/hgfs/setup/hadoop-2.7.6.tar.gz /opt/
tar -zxvf /opt/hadoop-2.7.6.tar.gz -C /opt/
vi /etc/profile
----------------------profile 文件---------------
export HADOOP_DEV_HOME=/opt/hadoop-2.7.6
export PATH=$PATH:$HADOOP_DEV_HOME/bin
export PATH=$PATH:$HADOOP_DEV_HOME/sbin
export HADOOP_MAPARED_HOME=${HADOOP_DEV_HOME}
export HADOOP_COMMON_HOME=${HADOOP_DEV_HOME}
export HADOOP_HDFS_HOME=${HADOOP_DEV_HOME}
export YARN_HOME=${HADOOP_DEV_HOME}
export HADOOP_CONF_DIR=${HADOOP_DEV_HOME}/etc/hadoop
-----------------------------------------------
source /etc/profile
vi /opt/hadoop-2.7.6/etc/hadoop/hadoop-env.sh
----------------------hadoop-env.sh 文件---------------
export JAVA_HOME=/usr/java/jdk1.8.0_161
------------------------------------------------------------
vi /opt/hadoop-2.7.6/etc/hadoop/core-site.xml
-------- core-site.xml 文件-------要在/opt/hadoop-2.7.6/新建目录 /data/tmp---
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://cMater:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/root/bigdata/hadoop-2.6.5/data/tmp</value>
</property>
</configuration>
-----------------------------------------------------------------------------
vi /opt/hadoop-2.7.6/etc/hadoop/hdfs-site.xml
------ hdfs-site.xml 文件----要在/opt/hadoop-2.7.6/新建目录 /data/cMater /data/namenode /data/checkpoint -------
<configuration>
<property>
<name>dfs.datanode.data.dir</name>
<value>/opt/hadoop-2.7.6/data/cMater</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>/opt/hadoop-2.7.6/data/namenode</value>
</property>
<property>
<name>dfs.namenode.checkpoint.dir</name>
<value>/opt/hadoop-2.7.6/data/checkpoint</value>
</property>
<property>
<name>dfs.replication</name>
<value>2</value>
</property>
</configuration>
------------------------------------------------------------
mkdir -p /opt/hadoop-2.7.6/data/tmp
mkdir -p /opt/hadoop-2.7.6/data/cMater
mkdir -p /opt/hadoop-2.7.6/data/namenode
mkdir -p /opt/hadoop-2.7.6/data/checkpoint
vi /opt/hadoop-2.7.6/etc/hadoop/yarn-site.xml
---------------------- yarn-site.xml 文件---------------
<configuration>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<property>
<name>yarn.resourcemanager.hostname</name>
<value>cMater</value>
</property>
</configuration>
------------------------------------------------------------
cp /opt/hadoop-2.7.6/etc/hadoop/mapred-site.xml.template /opt/hadoop-2.7.6/etc/hadoop/mapred-site.xml
vi /opt/hadoop-2.7.6/etc/hadoop/mapred-site.xml
---------------------- mapred-site.xml 文件---------------
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
<property>
<name>mapreduce.jobtracker.staging.root.dir</name>
<value>/user</value>
</property>
</configuration>
------------------------------------------------------------
========================用户 权限======================
useradd hadoop
passwd hadoop
chmod u+w /etc/sudoers
vi /etc/sudoers
------------sudoers 文件配置---root ALL=(ALL) ALL下添加一行----
hadoop ALL=(ALL) ALL
----------------------------------------------------------------------
chmod u-w /etc/sudoers
chown -R hadoop:hadoop /opt/hadoop-2.7.6
============启动 Hadoop ========切换Hadoop用户=============
su hadoop
******格式化 HDFS****************
hdfs namenode -format
*******单点重复格式化处理********
rm -rf 进行清空
/data/tmp
/data/cMater
/data/namenode
/data/checkpoint
内的缓存
***********单点启动失败*********
检查core-site.xml、hdfs-site.xml 、yarn-site.xml、mapred-site.xml文件格式
source /etc/hosts 失败
--------------------单节点启动--------------------------------namenode----
//hadoop-daemon.sh start secondarynamenode
hadoop-daemon.sh start namenode
hadoop-daemon.sh start datanode
yarn-daemon.sh start resourcemanager
yarn-daemon.sh start nodemanager
mr-jobhistory-daemon.sh start historyserver
yarn-daemon.sh start proxyserver
//hadoop-daemon.sh stop secondarynamenode
hadoop-daemon.sh stop namenode
hadoop-daemon.sh stop datanode
yarn-daemon.sh stop resourcemanager
yarn-daemon.sh stop nodemanager
mr-jobhistory-daemon.sh stop historyserver
yarn-daemon.sh stop proxyserver
----------------
./opt/hadoop-2.7.6/sbin/hadoop-daemon.sh start namenode
-----------datanode----Hadoop找不到类时检查nodemanager是否拼写正确--------
hadoop-daemon.sh start datanode
yarn-daemon.sh start nodemanager
hadoop-daemon.sh stop datanode
yarn-daemon.sh stop nodemanager
-------------------端口解析-----------------
HDFS 50070 http服务的端口
yarn 8088 http服务的端口
proxyserver WebAppProxyServer
history JobHistoryServer
===========================================
--------------------HDFS 权限问题---------------------
useradd 20160216048 # root操作
passwd 20160216048 #root操作
sudo usermod -a -G hadoop 20160216048 # root操作 20160216048添加到Hadoop组
hadoop fs -put /opt/hadoop-2.7.6.tar.gz /root/ #hadoop操作,root无法上传
hadoop fs -chown -R 20160216048:hadoop /root/ #hadoop操作
hadoop dfs -chmod -R 755 /abc #hadoop操作
hadoop dfsadmin -safemode leave #解除hadoop的安全模式
hadoop dfs -chmod -R 777 /abc #hadoop操作,修改权限，让组外用户进行操作
__________________________权限比重_______________________
drwxr-xr-x -rw-r--r--
d:文件夹 r:4 w:2 x:1
注意：hadoop fs -rm -r /tmp/ 与hadoop fs -rm -r /tmp没有区别！
========================== ==========================
------------------- HDFS 使用 ----------------------
===================== ==========================
------------------杀掉当前正在执行的hadoop任务---------------
列出当前hadoop正在执行的jobs: hadoop job -list
杀掉job: job_201212111628_11166：
[hadoop@192.168.10.11 bin]$ ./hadoop job -kill job_201212111628_11166
-----------------------Linux自定义命令----------------------
vi /root/.bashrc
alias 你自定的命令=系统原来的命令 如：alias hf='hadoop fs'
-----------------------------HDFS文件回传----------------------
hadoop fs -get /user/root/ds_out /mnt/hgfs/setup/data/
*****************************Linux补充 免密码登录***************
方法一：主从主机间要相互做一次
ssh-keygen -t rsa
ssh-copy-id -i ~/.ssh/id_rsa.pub cSlave01
方法二：
全部会话 ：
ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
ssh-copy-id node11/node12/node13
------------------------------禁用IPV6-----------------------
## 禁用IPv6
echo " " >> /etc/modprobe.d/dist.conf
echo "alias net-pf-10 off" >> /etc/modprobe.d/dist.conf
echo "alias ipv6 off" >> /etc/modprobe.d/dist.conf
## 查看是否追加成功
tail /etc/modprobe.d/dist.conf
---------------------设置文件打开数目和用户最大进程数---------------
## 设置用户最大进程数
vim /etc/security/limits.conf
## 结尾添加以下内容
* soft nofile 32768
* hard nofile 1048576
* soft nproc 65536
* hard nproc unlimited
* soft memlock unlimited
* hard memlock unlimited
---------------------------时区设置-------------------------
统一时区为东八区
我们国家的时区为东八区（+0800）：
#查看当前时区
date -R;cat /etc/sysconfig/clock
不是北京时间，要设置一下时区，方法如下，执行命令：
# 设置东八区时区为当前时区
rm -rf /etc/localtime
cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
# 手动同步下网络时间
ntpdate -u cn.pool.ntp.org
vim /etc/sysconfig/clock
ZONE="Asia/Shanghai"
在次查看
date -R;cat /etc/sysconfig/clock
----------------------------Linux操作系统系统语言采用------------------
-------------转英文---------------
# 查看操作系统系统语言
echo $LANG
# 修改操作系统系统语言
vim /etc/sysconfig/i18n
LANG="en_US.UTF-8"
----------------转中文------------
# 查看操作系统系统语言
echo $LANG
# 修改操作系统系统语言
vim /etc/sysconfig/i18n
LANG="zh_CN.UTF-8"