1 ÏȾöÌõ¼þ
È·±£ÔÚÄ㼯ȺÖеÄÿ¸ö½ÚµãÉ϶¼°²×°ÁËËùÓбØÐèÈí¼þ£ºsun-JDK £¬ssh£¬Hadoop
JavaTM1.5.x£¬±ØÐë°²×°£¬½¨ÒéÑ¡ÔñSun¹«Ë¾·¢ÐеÄJava°æ±¾¡£
ssh ±ØÐë°²×°²¢ÇÒ±£Ö¤ sshdÒ»Ö±ÔËÐУ¬ÒÔ±ãÓÃHadoop ½Å±¾¹ÜÀíÔ¶¶ËHadoopÊØ»¤½ø³Ì¡£
2 ʵÑé»·¾³´î½¨
2.1 ×¼±¸¹¤×÷
²Ù×÷ϵͳ£ºUbuntu
²¿Êð£ºVmvare
ÔÚvmvare°²×°ºÃһ̨UbuntuÐéÄâ»úºó£¬¿ÉÒÔµ¼³ö»òÕ߿ˡ³öÁíÍâÁ½Ì¨ÐéÄâ»ú¡£
˵Ã÷£º
±£Ö¤ÐéÄâ»úµÄipºÍÖ÷»úµÄipÔÚͬһ¸öip¶Î£¬ÕâÑù¼¸¸öÐéÄâ»úºÍÖ÷»úÖ®¼ä¿ÉÒÔÏ໥ͨÐÅ¡£
ΪÁ˱£Ö¤ÐéÄâ»úµÄipºÍÖ÷»úµÄipÔÚͬһ¸öip¶Î£¬ÐéÄâ»úÁ¬½ÓÉèÖÃΪÇÅÁ¬¡£
×¼±¸»úÆ÷£ºÒ»Ì¨master£¬Èô¸Ę́slave£¬ÅäÖÃÿ̨»úÆ÷µÄ/etc/hosts±£Ö¤¸÷̨»úÆ÷Ö®¼äͨ¹ý»úÆ÷Ãû¿ÉÒÔ»¥·Ã£¬ÀýÈ磺
10.64.56.76 node1£¨master£©
10.64.56.77 node2 £¨slave1£©
10.64.56.78 node3 £¨slave2£©
|
Ö÷»úÐÅÏ¢:

2.2 °²×°JDK
#°²×°JDK
$ sudo apt-get install sun-java6-jdk1.2.3 |
Õâ¸ö°²×°£¬javaÖ´ÐÐÎļþ×Ô¶¯Ìí¼Óµ½/usr/bin/Ŀ¼¡£
ÑéÖ¤ shellÃüÁî £ºjava -version ¿´ÊÇ·ñÓëÄãµÄ°æ±¾ºÅÒ»Ö¡£
2.3ÏÂÔØ¡¢´´½¨Óû§
$ useradd hadoop
$ cd /home/hadoop |
ÔÚËùÓеĻúÆ÷É϶¼½¨Á¢ÏàͬµÄĿ¼£¬Ò²¿ÉÒԾͽ¨Á¢ÏàͬµÄÓû§£¬×îºÃÊÇÒÔ¸ÃÓû§µÄhome·¾¶À´×öhadoopµÄ°²×°Â·¾¶¡£
ÀýÈçÔÚËùÓеĻúÆ÷Éϵݲװ·¾¶¶¼ÊÇ£º/home/hadoop/hadoop-0.20.203£¬Õâ¸ö²»ÐèÒªmkdir£¬ÔÚ/home/hadoop/Ͻâѹhadoop°üµÄʱºò£¬»á×Ô¶¯Éú³É£©
£¨µ±È»¿ÉÒÔ°²×°/usr/local/Ŀ¼Ï£¬ÀýÈç/usr/local/hadoop-0.20.203/
chown -R hadoop /usr/local/hadoop-0.20.203/
chgrp -R hadoop /usr/local/hadoop-0.20.203/£©
(×îºÃ²»ÒªÊ¹ÓÃroot°²×°,ÒòΪ²»ÍƼö¸÷¸ö»úÆ÷Ö®¼äʹÓÃroot·ÃÎÊ ) |
2.4 °²×°sshºÍÅäÖÃ
1£© °²×°£ºsudo apt-get install ssh
Õâ¸ö°²×°Íêºó£¬¿ÉÒÔÖ±½ÓʹÓÃsshÃüÁî ÁË¡£
Ö´ÐÐ$ netstat -nat ²é¿´22¶Ë¿ÚÊÇ·ñ¿ªÆôÁË¡£
²âÊÔ£ºssh localhost¡£
ÊäÈ뵱ǰÓû§µÄÃÜÂ룬»Ø³µ¾ÍokÁË¡£ËµÃ÷°²×°³É¹¦£¬Í¬Ê±sshµÇ¼ÐèÒªÃÜÂë¡£
£¨ÕâÖÖĬÈϰ²×°·½Ê½Íêºó£¬Ä¬ÈÏÅäÖÃÎļþÊÇÔÚ/etc/ssh/Ŀ¼Ï¡£sshdÅäÖÃÎļþÊÇ£º/etc/ssh/sshd_config£©£º
×¢Ò⣺ÔÚËùÓлú×Ó¶¼ÐèÒª°²×°ssh¡£
2£© ÅäÖãº
ÔÚHadoopÆô¶¯ÒÔºó£¬NamenodeÊÇͨ¹ýSSH£¨Secure Shell£©À´Æô¶¯ºÍÍ£Ö¹¸÷¸ödatanodeÉϵĸ÷ÖÖÊØ»¤½ø³ÌµÄ£¬Õâ¾ÍÐëÒªÔÚ½ÚµãÖ®¼äÖ´ÐÐÖ¸ÁîµÄʱºòÊDz»ÐëÒªÊäÈëÃÜÂëµÄÐÎʽ£¬¹ÊÎÒÃÇÐëÒªÅäÖÃSSHÔËÓÃÎÞÃÜÂ빫ԿÈÏÖ¤µÄÐÎʽ¡£
ÒÔ±¾ÎÄÖеÄÈý̨»úÆ÷ΪÀý£¬ÏÖÔÚnode1ÊÇÖ÷½Úµã£¬ËûÐëÒªÁ¬½Ónode2ºÍnode3¡£ÐëҪȷ¶¨Ã¿Ì¨»úÆ÷É϶¼°²×°ÁËssh£¬²¢ÇÒdatanode»úÆ÷ÉÏsshd·þÎñÒѾÆô¶¯¡£
( ˵Ã÷£ºhadoop@hadoop~]$ssh-keygen -t rsa
Õâ¸öÃüÁΪhadoopÉϵÄÓû§hadoopÉú³ÉÆäÃÜÔ¿¶Ô£¬Ñ¯ÎÊÆä±£´æÂ·¾¶Ê±Ö±½Ó»Ø³µ²ÉÓÃĬÈÏ·¾¶£¬µ±ÌáʾҪΪÉú³ÉµÄÃÜÔ¿ÊäÈëpassphraseµÄʱºò£¬Ö±½Ó»Ø³µ£¬Ò²¾ÍÊǽ«ÆäÉ趨Ϊ¿ÕÃÜÂë¡£Éú³ÉµÄÃÜÔ¿¶Ôid_rsa£¬id_rsa.pub£¬Ä¬ÈÏ´æ´¢ÔÚ/home/hadoop/.sshĿ¼ÏÂÈ»ºó½«id_rsa.pubµÄÄÚÈݸ´ÖƵ½Ã¿¸ö»úÆ÷(Ò²°üÀ¨±¾»ú)µÄ/home/dbrg/.ssh/authorized_keysÎļþÖУ¬Èç¹û»úÆ÷ÉÏÒѾÓÐauthorized_keysÕâ¸öÎļþÁË£¬¾ÍÔÚÎļþĩβ¼ÓÉÏid_rsa.pubÖеÄÄÚÈÝ£¬Èç¹ûûÓÐauthorized_keysÕâ¸öÎļþ£¬Ö±½Ó¸´ÖƹýÈ¥¾ÍÐÐ.)
3) Ê×ÏÈÉèÖÃnamenodeµÄsshΪÎÞÐèÃÜÂëµÄ¡¢×Ô¶¯µÇ¼¡£
Çл»µ½hadoopÓû§( ±£Ö¤Óû§hadoop¿ÉÒÔÎÞÐèÃÜÂëµÇ¼£¬ÒòΪÎÒÃǺóÃæ°²×°µÄhadoopÊôÖ÷ÊÇhadoopÓû§¡£)
$ su hadoop
cd /home/hadoop
$ ssh-keygen -t rsa |
È»ºóÒ»Ö±°´»Ø³µ
Íê³Éºó£¬ÔÚhome¸úĿ¼Ï»á²úÉúÒþ²ØÎļþ¼Ð.ssh
Ö®ºóls ²é¿´Îļþ
cp id_rsa.pub authorized_keys |
²âÊÔ£º
»òÕߣº
µÚÒ»´Îssh»áÓÐÌáʾÐÅÏ¢£º
The authenticity of host ¡®node1 (10.64.56.76)¡¯ can¡¯t be established.
RSA key fingerprint is 03:e0:30:cb:6e:13:a8:70:c9:7e:cf:ff:33:2a:67:30.
Are you sure you want to continue connecting (yes/no)?
|
ÊäÈë yes À´¼ÌÐø¡£Õâ»á°Ñ¸Ã·þÎñÆ÷Ìí¼Óµ½ÄãµÄÒÑÖªÖ÷»úµÄÁбíÖÐ
·¢ÏÖÁ´½Ó³É¹¦£¬²¢ÇÒÎÞÐèÃÜÂë¡£
4 ) ¸´ÖÆauthorized_keysµ½node2 ºÍnode3
ÉÏ
ΪÁ˱£Ö¤node1¿ÉÒÔÎÞÐèÃÜÂë×Ô¶¯µÇ¼µ½node2ºÍnode3£¬ÏÈÔÚnode2ºÍnode3ÉÏÖ´ÐÐ
$ su hadoop
cd /home/hadoop
$ ssh-keygen -t rsa |
һ·°´»Ø³µ.
È»ºó»Øµ½node1£¬¸´ÖÆauthorized_keysµ½node2 ºÍnode3
[hadoop@hadoop .ssh]$ scp authorized_keys node2:/home/hadoop/.ssh/
[hadoop@hadoop .ssh]$ scp authorized_keys node3:/home/hadoop/.ssh/ |
ÕâÀï»áÌáʾÊäÈëÃÜÂë,ÊäÈëhadoopÕ˺ÅÃÜÂë¾Í¿ÉÒÔÁË¡£
¸Ä¶¯ÄãµÄ authorized_keys ÎļþµÄÐí¿ÉȨÏÞ
[hadoop@hadoop .ssh]$chmod 644 authorized_keys |
²âÊÔ£ºssh node2»òÕßssh node3£¨µÚÒ»´ÎÐèÒªÊäÈëyes£©¡£
Èç¹û²»ÐëÒªÊäÈëÃÜÂëÔòÅäÖóɹ¦£¬Èç¹û»¹ÐëÒªÇë¼ì²éÉÏÃæµÄÅäÖÃÄܲ»ÄÜÕýÈ·¡£
2.5 °²×°Hadoop
#Çл»ÎªhadoopÓû§
su hadoop
wgethttp://apache.mirrors.tds.net//hadoop/common/hadoop-0.20.203.0/hadoop-0.20.203.0rc1.tar.gz
|
ÏÂÔØ°²×°°üºó£¬Ö±½Ó½âѹ°²×°¼´¿É£º
$ tar -zxvfhadoop-0.20.203.0rc1.tar.gz |
1 ) °²×°Hadoop¼¯ÈºÍ¨³£Òª½«°²×°Èí¼þ½âѹµ½¼¯ÈºÄÚµÄËùÓлúÆ÷ÉÏ¡£²¢ÇÒ°²×°Â·¾¶ÒªÒ»Ö£¬Èç¹ûÎÒÃÇÓÃHADOOP_HOMEÖ¸´ú°²×°µÄ¸ù·¾¶£¬Í¨³££¬¼¯ÈºÀïµÄËùÓлúÆ÷µÄHADOOP_HOME·¾¶Ïàͬ¡£
2 ) Èç¹û¼¯ÈºÄÚ»úÆ÷µÄ»·¾³ÍêȫһÑù£¬¿ÉÒÔÔÚһ̨»úÆ÷ÉÏÅäÖúã¬È»ºó°ÑÅäÖúõÄÈí¼þ¼´hadoop-0.20.203Õû¸öÎļþ¼Ð¿½±´µ½ÆäËû»úÆ÷µÄÏàͬλÖü´¿É¡£
3 ) ¿ÉÒÔ½«MasterÉϵÄHadoopͨ¹ýscp¿½±´µ½Ã¿Ò»¸öSlaveÏàͬµÄĿ¼Ï£¬Í¬Ê±¸ù¾Ýÿһ¸öSlaveµÄJava_HOME
µÄ²»Í¬ÐÞ¸ÄÆähadoop-env.sh ¡£
4) ΪÁË·½±ã£¬Ê¹ÓÃhadoopÃüÁî»òÕßstart-all.shµÈÃüÁÐÞ¸ÄMasterÉÏ/etc/profile
ÐÂÔöÒÔÏÂÄÚÈÝ£º
export HADOOP_HOME=/home/hadoop/hadoop-0.20.203
exportPATH=$PATH:$HADOOP_HOME/bin |
ÐÞ¸ÄÍê±Ïºó£¬Ö´ÐÐsource /etc/profile À´Ê¹ÆäÉúЧ¡£
6£©ÅäÖÃconf/hadoop-env.shÎļþ
ÅäÖÃconf/hadoop-env.shÎļþ
#Ìí¼Ó
export JAVA_HOME=/usr/lib/jvm/java-6-sun/ |
ÕâÀïÐÞ¸ÄΪÄãµÄjdkµÄ°²×°Î»Öá£
²âÊÔhadoop°²×°£º
Bin/hadoop jar hadoop-0.20.2-examples.jarwordcount
conf/ /tmp/out |
3. ¼¯ÈºÅäÖã¨ËùÓнڵãÏàͬ£©
3.1ÅäÖÃÎļþ£ºconf/core-site.xml
<?xml version="1.0"?> <?xml-stylesheet type="text/xsl"href="configuration.xsl"?> <configuration> <property> <name>fs.default.name</name> <value>hdfs://node1:49000</value> </property> <property> <name>hadoop.tmp.dir</name> <value>/home/hadoop/hadoop_home/var</value> </property> </configuration> |
1£©fs.default.nameÊÇNameNodeµÄURI¡£hdfs://Ö÷»úÃû:¶Ë¿Ú/
2£©hadoop.tmp.dir £ºHadoopµÄĬÈÏÁÙʱ·¾¶£¬Õâ¸ö×îºÃÅäÖã¬Èç¹ûÔÚÐÂÔö½Úµã»òÕ߯äËûÇé¿öÏÂĪÃûÆäÃîµÄDataNodeÆô¶¯²»ÁË£¬¾Íɾ³ý´ËÎļþÖеÄtmpĿ¼¼´¿É¡£²»¹ýÈç¹ûɾ³ýÁËNameNode»úÆ÷µÄ´ËĿ¼£¬ÄÇô¾ÍÐèÒªÖØÐÂÖ´ÐÐNameNode¸ñʽ»¯µÄÃüÁî¡£
3.2ÅäÖÃÎļþ£ºconf/mapred-site.xml
<?xmlversion="1.0"?> <?xml-stylesheettype="text/xsl" href="configuration.xsl"?> <configuration> <property> <name>mapred.job.tracker</name> <value>node1:49001</value> </property> <property> <name>mapred.local.dir</name> <value>/home/hadoop/hadoop_home/var</value> </property> </configuration> |
1£©mapred.job.trackerÊÇJobTrackerµÄÖ÷»ú£¨»òÕßIP£©ºÍ¶Ë¿Ú¡£Ö÷»ú:¶Ë¿Ú¡£
3.3ÅäÖÃÎļþ£ºconf/hdfs-site.xml
<?xmlversion="1.0"?> <?xml-stylesheettype="text/xsl" href="configuration.xsl"?> <configuration> <property> <name>dfs.name.dir</name> <value>/home/hadoop/name1, /home/hadoop/name2</value> #hadoopµÄnameĿ¼·¾¶ <description> </description> </property> <property> <name>dfs.data.dir</name> <value>/home/hadoop/data1, /home/hadoop/data2</value> <description> </description> </property> <property> <name>dfs.replication</name> <!-- ÎÒÃǵļ¯ÈºÓÖÁ½¸ö½áµã£¬ËùÒÔrepÁ½·Ý --> <value>2</vaue> </property> </configuration> |
1£© dfs.name.dirÊÇNameNode³Ö¾Ã´æ´¢Ãû×ֿռ估ÊÂÎñÈÕÖ¾µÄ±¾µØÎļþϵͳ·¾¶¡£
µ±Õâ¸öÖµÊÇÒ»¸ö¶ººÅ·Ö¸îµÄĿ¼Áбíʱ£¬nametableÊý¾Ý½«»á±»¸´ÖƵ½ËùÓÐĿ¼ÖÐ×öÈßÓ౸·Ý¡£
2£© dfs.data.dirÊÇDataNode´æ·Å¿éÊý¾ÝµÄ±¾µØÎļþϵͳ·¾¶£¬¶ººÅ·Ö¸îµÄÁÐ±í¡£
µ±Õâ¸öÖµÊǶººÅ·Ö¸îµÄĿ¼Áбíʱ£¬Êý¾Ý½«±»´æ´¢ÔÚËùÓÐĿ¼Ï£¬Í¨³£·Ö²¼ÔÚ²»Í¬É豸ÉÏ¡£
3£©dfs.replicationÊÇÊý¾ÝÐèÒª±¸·ÝµÄÊýÁ¿£¬Ä¬ÈÏÊÇ3£¬Èç¹û´ËÊý´óÓÚ¼¯ÈºµÄ»úÆ÷Êý»á³ö´í¡£
×¢Ò⣺´Ë´¦µÄname1¡¢name2¡¢data1¡¢data2Ŀ¼²»ÄÜÔ¤ÏÈ´´½¨£¬hadoop¸ñʽ»¯Ê±»á×Ô¶¯´´½¨£¬Èç¹ûÔ¤ÏÈ´´½¨·´¶ø»áÓÐÎÊÌâ¡£
3.4ÅäÖÃmastersºÍslavesÖ÷´Ó½áµã
ÅäÖÃconf/mastersºÍconf/slavesÀ´ÉèÖÃÖ÷´Ó½áµã£¬×¢Òâ×îºÃʹÓÃÖ÷»úÃû£¬²¢ÇÒ±£Ö¤»úÆ÷Ö®¼äͨ¹ýÖ÷»úÃû¿ÉÒÔ»¥Ïà·ÃÎÊ£¬Ã¿¸öÖ÷»úÃûÒ»ÐС£
vi masters£º
ÊäÈ룺
vi slaves£º
ÊäÈ룺
ÅäÖýáÊø£¬°ÑÅäÖúõÄhadoopÎļþ¼Ð¿½±´µ½ÆäËû¼¯ÈºµÄ»úÆ÷ÖУ¬²¢ÇÒ±£Ö¤ÉÏÃæµÄÅäÖöÔÓÚÆäËû»úÆ÷¶øÑÔÕýÈ·£¬ÀýÈ磺Èç¹ûÆäËû»úÆ÷µÄJava°²×°Â·¾¶²»Ò»Ñù£¬ÒªÐÞ¸Äconf/hadoop-env.sh
$ scp -r /home/hadoop/hadoop-0.20.203 root@node2: /home/hadoop/ |
4 hadoopÆô¶¯
4.1 ¸ñʽ»¯Ò»¸öеķֲ¼Ê½Îļþϵͳ
Ïȸñʽ»¯Ò»¸öеķֲ¼Ê½Îļþϵͳ
$ cd hadoop-0.20.203
$ bin/hadoop namenode -format |
³É¹¦Çé¿öÏÂϵͳÊä³ö£º
12/02/06 00:46:50 INFO namenode.NameNode:STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG: host = ubuntu/127.0.1.1
STARTUP_MSG: args = [-format]
STARTUP_MSG: version = 0.20.203.0
STARTUP_MSG: build =http://svn.apache.org/repos/asf/hadoop/common
/branches/branch-0.20-security-203-r 1099333; compiled by 'oom' on Wed May 4 07:57:50 PDT 2011
************************************************************/
12/02/0600:46:50 INFO namenode.FSNamesystem: fsOwner=root,root
12/02/06 00:46:50 INFO namenode.FSNamesystem:supergroup=supergroup
12/02/06 00:46:50 INFO namenode.FSNamesystem:isPermissionEnabled=true
12/02/06 00:46:50 INFO common.Storage: Imagefile of size 94 saved in 0 seconds.
12/02/06 00:46:50 INFO common.Storage: Storagedirectory /opt/hadoop/hadoopfs/name1 has been successfully formatted.
12/02/06 00:46:50 INFO common.Storage: Imagefile of size 94 saved in 0 seconds.
12/02/06 00:46:50 INFO common.Storage: Storagedirectory /opt/hadoop/hadoopfs/name2 has been successfully formatted.
12/02/06 00:46:50 INFO namenode.NameNode:SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode atv-jiwan-ubuntu-0/127.0.0.1
************************************************************/
|
²é¿´Êä³ö±£Ö¤·Ö²¼Ê½Îļþϵͳ¸ñʽ»¯³É¹¦
Ö´ÐÐÍêºó¿ÉÒÔµ½master»úÆ÷ÉÏ¿´µ½/home/hadoop//name1ºÍ/home/hadoop//name2Á½¸öĿ¼¡£ÔÚÖ÷½ÚµãmasterÉÏÃæÆô¶¯hadoop£¬Ö÷½Úµã»áÆô¶¯ËùÓдӽڵãµÄhadoop¡£
4.2 Æô¶¯ËùÓнڵã
Æô¶¯·½Ê½1£º
$ bin/start-all.sh £¨Í¬Ê±Æô¶¯HDFSºÍMap/Reduce£© |
ϵͳÊä³ö£º
starting namenode, logging to /usr/local/hadoop/logs/hadoop-hadoop-namenode-ubuntu.out
node2: starting datanode, loggingto /usr/local/hadoop/logs/hadoop-hadoop-datanode-ubuntu.out
node3: starting datanode, loggingto /usr/local/hadoop/logs/hadoop-hadoop-datanode-ubuntu.out
node1: starting secondarynamenode,logging to /usr/local/hadoop/logs/hadoop-hadoop-secondarynamenode-ubuntu.out
starting jobtracker, logging to/usr/local/hadoop/logs/hadoop-hadoop-jobtracker-ubuntu.out
node2: starting tasktracker,logging to /usr/local/hadoop/logs/hadoop-hadoop-tasktracker-ubuntu.out
node3: starting tasktracker,logging to /usr/local/hadoop/logs/hadoop-hadoop-tasktracker-ubuntu.out
As you can see in slave's output above, it will automatically format it's storage directory
(specified by dfs.data.dir) if it is not formattedalready. It will also create the directory if it does not exist yet.
|
Ö´ÐÐÍêºó¿ÉÒÔµ½master£¨node1£©ºÍslave£¨node1£¬node2£©»úÆ÷ÉÏ¿´µ½/home/hadoop/hadoopfs/data1ºÍ/home/hadoop/data2Á½¸öĿ¼¡£
Æô¶¯·½Ê½2£º
Æô¶¯Hadoop¼¯ÈºÐèÒªÆô¶¯HDFS¼¯ÈººÍMap/Reduce¼¯Èº¡£
ÔÚ·ÖÅäµÄNameNodeÉÏ£¬ÔËÐÐÏÂÃæµÄÃüÁîÆô¶¯HDFS£º
$ bin/start-dfs.sh£¨µ¥¶ÀÆô¶¯HDFS¼¯Èº£© |
bin/start-dfs.sh½Å±¾»á²ÎÕÕNameNodeÉÏ${HADOOP_CONF_DIR}/slavesÎļþµÄÄÚÈÝ£¬ÔÚËùÓÐÁгöµÄslaveÉÏÆô¶¯DataNodeÊØ»¤½ø³Ì¡£
ÔÚ·ÖÅäµÄJobTrackerÉÏ£¬ÔËÐÐÏÂÃæµÄÃüÁîÆô¶¯Map/Reduce£º
$bin/start-mapred.sh £¨µ¥¶ÀÆô¶¯Map/Reduce£© |
bin/start-mapred.sh½Å±¾»á²ÎÕÕJobTrackerÉÏ${HADOOP_CONF_DIR}/slavesÎļþµÄÄÚÈÝ£¬ÔÚËùÓÐÁгöµÄslaveÉÏÆô¶¯TaskTrackerÊØ»¤½ø³Ì¡£
4.3 ¹Ø±ÕËùÓнڵã
´ÓÖ÷½Úµãmaster¹Ø±Õhadoop£¬Ö÷½Úµã»á¹Ø±ÕËùÓдӽڵãµÄhadoop¡£
HadoopÊØ»¤½ø³ÌµÄÈÕ־дÈëµ½ ${HADOOP_LOG_DIR} Ŀ¼
(ĬÈÏÊÇ ${HADOOP_HOME}/logs).
${HADOOP_HOME}¾ÍÊǰ²×°Â·¾¶. |
5 .²âÊÔ
1£©ä¯ÀÀNameNodeºÍJobTrackerµÄÍøÂç½Ó¿Ú£¬ËüÃǵĵØÖ·Ä¬ÈÏΪ£º
NameNode - http://node1:50070/
JobTracker - http://node2:50030/ |
3£© ʹÓÃnetstat ¨Cnat²é¿´¶Ë¿Ú49000ºÍ49001ÊÇ·ñÕýÔÚʹÓá£
4£© ʹÓÃjps²é¿´½ø³Ì
ÒªÏë¼ì²éÊØ»¤½ø³ÌÊÇ·ñÕýÔÚÔËÐУ¬¿ÉÒÔʹÓà jps ÃüÁÕâÊÇÓÃÓÚ JVM ½ø³ÌµÄps ʵÓóÌÐò£©¡£Õâ¸öÃüÁîÁгö
5 ¸öÊØ»¤½ø³Ì¼°Æä½ø³Ì±êʶ·û¡£
5£©½«ÊäÈëÎļþ¿½±´µ½·Ö²¼Ê½Îļþϵͳ£º
$ bin/hadoop fs -mkdir input
$ bin/hadoop fs -put conf/core-site.xml input |
ÔËÐз¢ÐаæÌṩµÄʾÀý³ÌÐò£º
$ bin/hadoop jar hadoop-0.20.2-examples.jar grep input output 'dfs[a-z.]+' |
6.²¹³ä
Q: bin/hadoop jar hadoop-0.20.2-examples.jar
grep input output 'dfs[a-z.]+' ʲôÒâ˼°¡£¿
A: bin/hadoop jar£¨Ê¹ÓÃhadoopÔËÐÐjar°ü£© hadoop-0.20.2_examples.jar£¨jar°üµÄÃû×Ö£©
grep £¨ÒªÊ¹ÓõÄÀ࣬ºó±ßµÄÊDzÎÊý£©input output 'dfs[a-z.]+'
Õû¸ö¾ÍÊÇÔËÐÐhadoopʾÀý³ÌÐòÖеÄgrep£¬¶ÔÓ¦µÄhdfsÉϵÄÊäÈëĿ¼Ϊinput¡¢Êä³öĿ¼Ϊoutput¡£
Q: ʲôÊÇgrep?
A: A map/reduce program that counts
the matches of a regex in the input.
²é¿´Êä³öÎļþ£º
½«Êä³öÎļþ´Ó·Ö²¼Ê½Îļþϵͳ¿½±´µ½±¾µØÎļþϵͳ²é¿´£º
$ bin/hadoop fs -get output output
$ cat output/* |
»òÕß
ÔÚ·Ö²¼Ê½ÎļþϵͳÉϲ鿴Êä³öÎļþ£º
$ bin/hadoop fs -cat output/* |
ͳ¼Æ½á¹û£º
root@v-jiwan-ubuntu-0:~/hadoop/hadoop-0.20.2-bak/hadoop-0.20.2#bin/hadoop fs -cat output/part-00000 3 dfs.class 2 dfs.period 1 dfs.file 1 dfs.replication 1 dfs.servers 1 dfsadmin |
7. HDFS³£ÓòÙ×÷
hadoopdfs -ls ÁгöHDFSϵÄÎļþ hadoop dfs -ls in ÁгöHDFSÏÂij¸öÎĵµÖеÄÎļþ hadoop dfs -put test1.txt test ÉÏ´«Îļþµ½Ö¸¶¨Ä¿Â¼²¢ÇÒÖØÐÂÃüÃû£¬Ö»ÓÐËùÓеÄDataNode¶¼½ÓÊÕÍêÊý¾Ý²ÅËã³É¹¦ hadoop dfs -get in getin ´ÓHDFS»ñÈ¡Îļþ²¢ÇÒÖØÐÂÃüÃûΪgetin£¬Í¬putÒ»Ñù¿É²Ù×÷ÎļþÒ²¿É²Ù×÷Ŀ¼ hadoop dfs -rmr out ɾ³ýÖ¸¶¨Îļþ´ÓHDFSÉÏ hadoop dfs -cat in/* ²é¿´HDFSÉÏinĿ¼µÄÄÚÈÝ hadoop dfsadmin -report ²é¿´HDFSµÄ»ù±¾Í³¼ÆÐÅÏ¢£¬½á¹ûÈçÏ hadoop dfsadmin -safemode leave Í˳ö°²È«Ä£Ê½ hadoop dfsadmin -safemode enter ½øÈ밲ȫģʽ |
8.Ìí¼Ó½Úµã
¿ÉÀ©Õ¹ÐÔÊÇHDFSµÄÒ»¸öÖØÒªÌØÐÔ£¬Ê×ÏÈÔÚмӵĽڵãÉϰ²×°hadoop£¬È»ºóÐÞ¸Ä$HADOOP_HOME/conf/masterÎļþ£¬¼ÓÈë
NameNodeÖ÷»úÃû£¬È»ºóÔÚNameNode½ÚµãÉÏÐÞ¸Ä$HADOOP_HOME/conf/slavesÎļþ£¬¼ÓÈëмӽڵãÖ÷»úÃû£¬ÔÙ½¨Á¢µ½Ð¼ӽڵãÎÞÃÜÂëµÄSSHÁ¬½Ó
ÔËÐÐÆô¶¯ÃüÁ
È»ºó¿ÉÒÔͨ¹ýhttp://(MasternodeµÄÖ÷»úÃû):50070²é¿´ÐÂÌí¼ÓµÄDataNode
9¸ºÔؾùºâ
start-balancer.sh£¬¿ÉÒÔʹDataNode½ÚµãÉÏÑ¡Ôñ²ßÂÔÖØÐÂÆ½ºâDataNodeÉϵÄÊý¾Ý¿éµÄ·Ö²¼
½áÊøÓï:Óöµ½ÎÊÌâʱ£¬ÏȲ鿴logs£¬ºÜÓаïÖú¡£
10 SHell×Ô¶¯°²×°½Å±¾
#!/bin/bash
#validate user or group
validate() {
if [ 'id -u' == 0 ];then
echo "must not be root!"
exit 0
else
echo "---------welcome to hadoop---------"
fi
}
#hadoop install
hd-dir() {
if [ ! -d /home/hadoop/ ];then
mkdir /home/hadoop/
else
echo "download hadoop will begin"
fi
}
download-hd() {
wget -c http://archive.apache.org/dist/hadoop/core/stable/hadoop-1.0.4.tar.gz -O /home/hadoop/hadoop-1.0.4.tar.gz
tar -xzvf /home/hadoop/hadoop-1.0.4.tar.gz -C /home/hadoop
rm /home/hadoop/hadoop-1.0.4.tar.gz
Ln -s /home/hadoop/hadoop-1.0.4 /home/hadoop/hadoop1.0.4
}
#hadoop conf
hd-conf() {
echo "export JAVA_HOME=/usr/lib/jvm/java-6-openjdk-i386" >> /home/hadoop/hadoop1.0.4/conf/hadoop-env.sh
echo "#set path jdk" >> /home/hadoop/.profile
echo "export JAVA_HOME=/usr/lib/jvm/java-6-openjdk-i386" >> /home/hadoop/.profile
echo "#hadoop path" >> /home/hadoop/.profile
echo "export HADOOP_HOME=/home/hadoop/hadoop1.0.4" >> /home/hadoop/.profile
echo "PATH=$PATH:$HADOOP_HOME/bin:$JAVA_HOME/bin" >> /home/hadoop/.profile
echo "HADOOP_HOME_WARN_SUPPRESS=1" >> /home/hadoop/.profile
#hadoop core-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/core-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/core-site.xml
echo "fs.default.name" >> /home/hadoop/hadoop1.0.4/conf/core-site.xml
echo "hdfs://hadoop-master:9000" >> /home/hadoop/hadoop1.0.4/conf/core-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/core-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/core-site.xml
echo "hadoop.tmp.dir" >> /home/hadoop/hadoop1.0.4/conf/core-site.xml
echo "/home/hadoop/tmp" >> /home/hadoop/hadoop1.0.4/conf/core-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/core-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/core-site.xml
#hadoop hdfs-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "dfs.name.dir" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "/home/hadoop/name" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "dfs.data.dir" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "/home/hadoop/data" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "dfs.replication" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "1" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/hdfs-site.xml
# hadoop mapred-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/mapred-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/mapred-site.xml
echo "mapred.job.tracker" >> /home/hadoop/hadoop1.0.4/conf/mapred-site.xml
echo "hadoop-master:9001" >> /home/hadoop/hadoop1.0.4/conf/mapred-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/mapred-site.xml
echo "" >> /home/hadoop/hadoop1.0.4/conf/mapred-site.xml
#hadoop master
echo "hadoop-master" >> /home/hadoop/hadoop1.0.4/conf/masters
#hadoop slaves
echo "hadoop-master" >> /home/hadoop/hadoop1.0.4/conf/slaves
source /home/hadoop/.profile
}
hd-start() {
hadoop namenode -format
}
yes-or-no() {
echo "Is your name $* ?"
while true
do
echo -n "Enter yes or no: "
read x
case "$x" in
y | yes ) return 0;;
n | no ) return 1;;
* ) echo "Answer yes or no";;
esac
done
}
echo "Original params are $*"
if yes-or-no "$1"
then
echo "HI $1,nice name!"
validate
hd-dir
download-hd
hd-conf
else
echo "Never mind!"
fi
|
|