问题导读: 1.安装cdh5伪分布配置文件在什么位置? 2.不同的操作系统,cdh5的安装过程都包含哪些流程? 3.在yarn上运行wordcount都需要哪些准备? 4.CDH5是如何安装的? 简介: 如果安装过Cloudera Manager5,我们可能会知道,这个安装还是比较曲折的,因为一旦网络中断,那么我们的安装失败率还是比较高的。如果我们只想了解CDH,我们安装CDH5.CDH5该如何安装,而它的安装确实比hadoop要简单些,我们这里介绍单节点伪分布安装及如何在yarn上运行wordcount。 我们这里介绍了各个版本Linux系统,如何下载,如何安装,这里重点ubuntu12.04上的安装。 Red Hat/CentOS/Oracle 5 or Red Hat 6 系统
操作系统版本 | 下载链接 |
---|---|
Red Hat/CentOS/Oracle 5 | Red Hat/CentOS/Oracle 5 link |
Red Hat/CentOS/Oracle 6 | Red Hat/CentOS/Oracle 6 link |
安装 RPM Red Hat/CentOS/Oracle 5:
sudo yum --nogpgcheck localinstall cloudera-cdh-5-0.x86_64.rpm
Red Hat/CentOS/Oracle 6 (64-bit):
sudo yum --nogpgcheck localinstall cloudera-cdh-5-0.x86_64.rpm
安装 CDH 5 添加repository key Red Hat/CentOS/Oracle 5 系统:
sudo rpm --import http://archive.cloudera.com/cdh5/redhat/5/x86_64/cdh/RPM-GPG-KEY-cloudera
Red Hat/CentOS/Oracle 6 系统:
sudo rpm --import http://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/RPM-GPG-KEY-cloudera
安装yarn
sudo yum install hadoop-conf-pseudo
SLES 系统 下载 点此下载 安装rpm
sudo rpm -i cloudera-cdh-5-0.x86_64.rpm
安装CDH 5 添加repository key
sudo rpm --import http://archive.cloudera.com/cdh5/sles/11/x86_64/cdh/RPM-GPG-KEY-cloudera
安装YARN
sudo zypper install hadoop-conf-pseudo
Ubuntu and 其它 Debian 系统 1.下载
系统版本 | 下载链接 |
---|---|
Wheezy | Wheezy link |
Precise | Precise link |
2.复制到Linux操作系统 下载之后,我们使用wincp复制到Linux中
不会使用WinSCP,可以参考: 新手指导:使用 WinSCP(下载) 上文件到 Linux图文教程 3.安装package
sudo dpkg -i cdh5-repository_1.0_all.deb
4.安装 CDH 5
curl -s http://archive.cloudera.com/cdh5/ubuntu/precise/amd64/cdh/archive.key | sudo apt-key add -
5.安装Yarn
sudo apt-get update
sudo apt-get install hadoop-conf-pseudo
6.启动hadoop,验证是否正常工作 Red Hat、SLES 系统:
rpm -ql hadoop-conf-pseudo
Ubuntu 系统:
dpkg -L hadoop-conf-pseudo
注意的是配置文件目录为: /etc/hadoop/conf.pseudo
hadoop相关组件配置在
/etc/hadoop/conf.
第一步:格式化namenode:
sudo -u hdfs hdfs namenode -format
注意 所有的命令都是sudo -u hdfs 下面,如果执行这个命令需要输入密码,则说明安装有问题 在安装过程中会自动格式化hdfs,但是这里必须执行这一步
第二步:启动hdfs
for x in `cd /etc/init.d ; ls hadoop-hdfs-*` ; do sudo service $x start ; done
第三步:创建 /tmp, Staging and Log 目录 1.如果存在旧的 /tmp则移除
sudo -u hdfs hadoop fs -rm -r /tmp
2.创建新目录并设置权限:
sudo -u hdfs hadoop fs -mkdir -p /tmp/hadoop-yarn/staging/history/done_intermediate sudo -u hdfs hadoop fs -chown -R mapred:mapred /tmp/hadoop-yarn/staging sudo -u hdfs hadoop fs -chmod -R 1777 /tmp sudo -u hdfs hadoop fs -mkdir -p /var/log/hadoop-yarn sudo -u hdfs hadoop fs -chown yarn:mapred /var/log/hadoop-yarn
第四步:检查核实创建文件
drwxrwxrwt - hdfs supergroup 0 2012-05-31 15:31 /tmp drwxr-xr-x - hdfs supergroup 0 2012-05-31 15:31 /tmp/hadoop-yarn drwxrwxrwt - mapred mapred 0 2012-05-31 15:31 /tmp/hadoop-yarn/staging drwxr-xr-x - mapred mapred 0 2012-05-31 15:31 /tmp/hadoop-yarn/staging/history drwxrwxrwt - mapred mapred 0 2012-05-31 15:31 /tmp/hadoop-yarn/staging/history/done_intermediate drwxr-xr-x - hdfs supergroup 0 2012-05-31 15:31 /var drwxr-xr-x - hdfs supergroup 0 2012-05-31 15:31 /var/log drwxr-xr-x - yarn mapred 0 2012-05-31 15:31 /var/log/hadoop-yarn
第五步:启动 YARN
sudo service hadoop-yarn-resourcemanager start sudo service hadoop-yarn-nodemanager start sudo service hadoop-mapreduce-historyserver start
第六步:创建用户目录
sudo -u hdfs hadoop fs -mkdir /user/aboutyun sudo -u hdfs hadoop fs -chown aboutyun/user/aboutyun
我这里用的用户为aboutyun 在yarn上运行wordcount 这里的运行用户为aboutyun 1.创建运行job用户目录
sudo -u hdfs hadoop fs -mkdir /user/aboutyun
sudo -u hdfs hadoop fs -chown aboutyun /user/aboutyun
2.切换aboutyun用户
记得这一步很重要,否则会创建目录错误 3.创建hdfs输入目录,并上传数据
hadoop fs -mkdir input
hadoop fs -put /etc/hadoop/conf/*.xml input
hadoop fs -ls input Found 3 items: -rw-r--r-- 1 joe supergroup 1348 2012-02-13 12:21 input/core-site.xml -rw-r--r-- 1 joe supergroup 1913 2012-02-13 12:21 input/hdfs-site.xml -rw-r--r-- 1 joe supergroup 1001 2012-02-13 12:21 input/mapred-site.xml
4.设置HADOOP_MAPRED_HOME (在aboutyun用户下)
export HADOOP_MAPRED_HOME=/usr/lib/hadoop-mapreduce
5.运行wordcount程序
hadoop jar /usr/lib/hadoop-mapreduce/hadoop-mapreduce-examples.jar grep input output23 'dfs[a-z.] '
6.查看输出目录output23
<blockquote>hadoop fs -ls
7.列出输出文件
hadoop fs -ls output23 Found 2 items -rw-r--r-- 1 aboutyun aboutyun 0 2014-10-05 05:45 output23/_SUCCESS -rw-r--r-- 1 aboutyun aboutyun 244 2014-10-05 05:45 output23/part-r-00000
8.输出结果
$ hadoop fs -cat output23/part-r-00000 | head 1 dfs.safemode.min.datanodes 1 dfs.safemode.extension 1 dfs.replication 1 dfs.permissions.enabled 1 dfs.namenode.name.dir 1 dfs.namenode.checkpoint.dir 1 dfs.datanode.data.dir