Linux下部署Hadoop伪分布模式

　Hadoop版本为1.2.1

　　Linux使用Fedora19并使用hadoop账号安装

　　第一步：配置ssh本地登录证书（虽然为伪分布模式，Hadoop依然会使用SSH进行通信）

[hadoop@promote ~]$ which ssh /usr/bin/ssh [hadoop@promote ~]$ which ssh-keygen /usr/bin/ssh-keygen [hadoop@promote ~]$ which sshd /usr/sbin/sshd [hadoop@promote ~]$ ssh-keygen -t rsa

　　然后一路回车

Generating public/private rsa key pair. Enter file in which to save the key (/home/hadoop/.ssh/id_rsa): Created directory '/home/hadoop/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Passphrases do not match.  Try again. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/hadoop/.ssh/id_rsa. Your public key has been saved in /home/hadoop/.ssh/id_rsa.pub. The key fingerprint is: 2f:a9:60:c7:dc:38:8f:c7:bb:70:de:d4:39:c3:39:87 hadoop@promote.cache-dns.local The key's randomart image is: +--[ RSA 2048]----+ |                 | |                 | |                 | |                 | |        S        | |     o o o o +   | |    o B.= o E .  | |   . o Oo+   =   | |      o.=o.      | +-----------------+

　　最终将在/home/hadoop/.ssh/路径下生成私钥id_rsa和公钥id_rsa.pub

　　[hadoop@promote .ssh]$ cd /home/hadoop/.ssh/

　　[hadoop@promote .ssh]$ ls

　　id_rsa  id_rsa.pub

　　修改sshd服务配置文件：

　　[hadoop@promote .ssh]$ su root

　　密码：

　　[root@promote .ssh]# vi /etc/ssh/sshd_config

　　启用RSA加密算法验证（去掉前面的#号）

RSAAuthentication yes PubkeyAuthentication yes # The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2 # but this is overridden so installations will only check .ssh/authorized_keys AuthorizedKeysFile      .ssh/authorized_keys

　修改mapred-site.xml：

<?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <configuration> <property> <name>mapred.job.tracker</name> <value>localhost:9001</value> </property> </configuration>

　　修改hdfs-site.xml：

<?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <configuration> <property> <name>dfs.replication</name> <value>1</value> </property> </configuration>

　　master中指定的SNN节点和slaves中指定的从节点位置均为本地

[hadoop@promote conf]$ cat masters localhost [hadoop@promote conf]$ cat slaves localhost

　　第五步：启动Hadoop

[hadoop@promote bin]$ cd ../conf/ [hadoop@promote conf]$ cd ../bin [hadoop@promote bin]$ sh start-all.sh starting namenode, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-namenode-promote.cache-dns.local.out localhost: starting datanode, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-datanode-promote.cache-dns.local.out localhost: starting secondarynamenode, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-secondarynamenode-promote.cache-dns.local.out starting jobtracker, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-jobtracker-promote.cache-dns.local.out localhost: starting tasktracker, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-tasktracker-promote.cache-dns.local.out

　　可以看到所有Hadoop守护进程均已启动

　保存并退出，然后重启sshd服务

[root@promote .ssh]# service sshd restart Redirecting to /bin/systemctl restart  sshd.service [root@promote .ssh]# ps -ef|grep sshd root      1995     1  0 22:33 ?        00:00:00 sshd: hadoop [priv] hadoop    2009  1995  0 22:33 ?        00:00:00 sshd: hadoop@pts/0 root      4171     1  0 23:11 ?        00:00:00 /usr/sbin/sshd -D root      4175  3397  0 23:12 pts/0    00:00:00 grep --color=auto sshd

　　然后切换回hadoop用户，将ssh证书公钥拷贝至/home/hadoop/.ssh/authorized_keys文件中

　　[root@promote .ssh]# su hadoop

　　[hadoop@promote .ssh]$ cat id_rsa.pub >> authorized_keys

　　修改authorized_keys文件的权限为644（这步一定要有）

　　[hadoop@promote .ssh]$ chmod 644 authorized_keys

　　[hadoop@promote .ssh]$ ssh localhost

　　The authenticity of host 'localhost (127.0.0.1)' can't be established.

　　RSA key fingerprint is 25:1f:be:72:7b:83:8e:c7:96:b6:71:35:fc:5d:2e:7d.

　　Are you sure you want to continue connecting (yes/no)? yes

　　Warning: Permanently added 'localhost' (RSA) to the list of known hosts.

　　Last login: Thu Feb 13 23:42:43 2014

　　第一次登陆将会将证书内容保存在/home/hadoop/.ssh/known_hosts文件中，以后再次登陆将不需要输入密码

　　[hadoop@promote .ssh]$ ssh localhost

　　Last login: Thu Feb 13 23:46:04 2014 from localhost.localdomain

　　至此ssh证书部分配置完成

　　第二步：安装JDK

　　[hadoop@promote ~]$ java -version

　　java version "1.7.0_25"

　　OpenJDK Runtime Environment (fedora-2.3.10.3.fc19-i386)

　　OpenJDK Client VM (build 23.7-b01, mixed mode)

　　将OpenJDK换为Oracle的Java SE

　　[hadoop@promote .ssh]$ cd ~

　　[hadoop@promote ~]$ uname -i

　　i386

　　在Oracle的官网下载jdk-6u45-linux-i586.bin后上传至服务器，赋予权限并进行安装，最后删除安装包

　　[hadoop@promote ~]$ chmod u+x jdk-6u45-linux-i586.bin

　　[hadoop@promote ~]$ ./jdk-6u45-linux-i586.bin

　　[hadoop@promote ~]$ rm -rf jdk-6u45-linux-i586.bin

　　[hadoop@promote conf]$ export PATH=$PATH:/home/hadoop/jdk1.6.0_45/bin

　　出现以下结果说明JDK成功安装：

　　[hadoop@promote ~]$ java -version

　　java version "1.6.0_45"

　　Java(TM) SE Runtime Environment (build 1.6.0_45-b06)

　　Java HotSpot(TM) Client VM (build 20.45-b01, mixed mode, sharing)

　　第三步：安装Hadoop

　　在Hadoop官网下载hadoop-1.2.1.tar.gz并上传至服务器/home/hadoop路径下

　　[hadoop@promote ~]$ tar -xzf hadoop-1.2.1.tar.gz

　　[hadoop@promote ~]$ rm -rf hadoop-1.2.1.tar.gz

　　[hadoop@promote ~]$ cd hadoop-1.2.1/conf/

　　[hadoop@promote conf]$ vi hadoop-env.sh

　　将JAVA_HOME指向第二步安装的JDK所在目录片

　　# The java implementation to use.  Required.

　　export JAVA_HOME=/home/hadoop/jdk1.6.0_45

　　保存并退出

　　第四步：修改Hadoop配置文件

　　修改core-site.xml：

<?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <configuration> <property> <name>fs.default.name</name> <value>hdfs://localhost:9000</value> </property> </configuration>

posted on 2014-02-19 11:23 顺其自然EVO 阅读(1320) 评论(0)  编辑  收藏 所属分类: linux