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Ubuntu13.10下配置Nutch1.7和Solr4.6集成

1。系统准备安装Ubuntu13.10,设置源,之后sudoapt-getupdate和sudoapt-getupgrade2。相关软件准备(1)安装antsudoapt-getinstallant1.7,检查安装情况ant-version出现ApacheAntversion1.7.1compiledonSeptember32011表明安装成功。(

1。系统准备
安装Ubuntu13.10,设置源,之后sudo apt-get update和sudo apt-get upgrade

2。相关软件准备
(1)安装ant
sudo apt-get install ant1.7,检查安装情况ant -version出现


Apache Ant version 1.7.1 compiled on September 3 2011

表明安装成功。

(2)jdk安装配置
从官网下载jdk,解压到目录/opt/jdk

环境变量配置:sudo gedit /etc/profile文末添加内容

export JAVA_HOME=/opt/jdk
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

保存推出,source /etc/profile使配置生效。

检验:java -version和java均有内容(内容省了粘贴)

(3)nutch
下载nutch1.7,解压到/opt/nutch

cd /opt/nutch

bin/nutch
此时会出现用法帮助,表示安装成功了。下面进行相关配置。

step1:修改文件conf/nutch-site.xml,设置HTTP请求中agent的名字:




 
    http.agent.name
    Friendly Crawler
 


step2:创建种子文件夹
mkdir -p urls

step3:将种子URL写到文件urls/seed.txt中:sudo gedit seed.txt
http://www.linuxidc.com

step4:配置 conf/regex-urlfilter.txt
# accept anything else
# +.

# added by yoyo
+36kr.com

step5:修改conf/nutch-site.xml,在里面增加一个parser.skip.truncated属性:

  parser.skip.truncated
  false

这是因为用tcpdump或者wireshark抓包发现,该网站的页面内容采用truncate的方式分段返回,而nutch的默认设置是不处理这种方式的,需要打开之,
参考:http://lucene.472066.n3.nabble.com/Content-Truncation-in-Nutch-2-1-MySQL-td4038888.html

step6:爬取实验

bin/nutch crawl urls -dir crawl

(4)Solr安装
下载solr4.6,解压到/opt/solr

cd /opt/solr/example

java -jar start.jar

如能正常打开网页http://localhost:8983/solr/则说明成功。

3.Nutch与Solr集成
(1)环境变量设置:
sudo gedit /etc/profile 添加

export NUTCH_RUNTIME_HOME=/opt/nutch

export APACHE_SOLR_HOME=/opt/solr

(2)集成
mkdir ${APACHE_SOLR_HOME}/example/solr/conf
cp ${NUTCH_RUNTIME_HOME}/conf/schema.xml ${APACHE_SOLR_HOME}/example/solr/conf/

重启solr:

java -jar start.jar

建立索引:


bin/nutch crawl urls  -dir crawl -depth 2 -topN 5 -solrhttp://localhost:8983/solr/

出错:

Active IndexWriters :
SOLRIndexWriter
    solr.server.url : URL of the SOLR instance (mandatory)
    solr.commit.size : buffer size when sending to SOLR (default 1000)
    solr.mapping.file : name of the mapping file for fields (default solrindex-mapping.xml)
    solr.auth : use authentication (default false)
    solr.auth.username : use authentication (default false)
    solr.auth : username for authentication
    solr.auth.password : password for authentication


Exception in thread "main" java.io.IOException: Job failed!
    at org.apache.Hadoop.mapred.JobClient.runJob(JobClient.java:1357)
    at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:123)
    at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:81)
    at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:65)
    at org.apache.nutch.crawl.Crawl.run(Crawl.java:155)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
    at org.apache.nutch.crawl.Crawl.main(Crawl.java:55)

解决方法是参考http://stackoverflow.com/questions/13429481/error-while-indexing-in-solr-data-crawled-by-nutch

类似的还有其他一些字段需要补充,方法是编辑 ~/solr-4.4.0/example/solr/collection1/conf/schema.xml,在…中增加以下的字段:
 
 
 
 
 


(3)验证
rm crawl/ -Rf

bin/nutch crawl urls  -dir crawl -depth 2 -topN 5 -solrhttp://localhost:8983/solr/

…………

…………

CrawlDb update: Merging segment data into db.
CrawlDb update: finished at 2014-03-03 08:55:30, elapsed: 00:00:01
LinkDb: starting at 2014-03-03 08:55:30
LinkDb: linkdb: crawl/linkdb
LinkDb: URL normalize: true
LinkDb: URL filter: true
LinkDb: internal links will be ignored.
LinkDb: adding segment: file:/opt/nutch/crawl/segments/20140303085430
LinkDb: adding segment: file:/opt/nutch/crawl/segments/20140303085441
LinkDb: finished at 2014-03-03 08:55:31, elapsed: 00:00:01
Indexer: starting at 2014-03-03 08:55:31
Indexer: deleting gone documents: false
Indexer: URL filtering: false
Indexer: URL normalizing: false
Active IndexWriters :
SOLRIndexWriter
    solr.server.url : URL of the SOLR instance (mandatory)
    solr.commit.size : buffer size when sending to SOLR (default 1000)
    solr.mapping.file : name of the mapping file for fields (default solrindex-mapping.xml)
    solr.auth : use authentication (default false)
    solr.auth.username : use authentication (default false)
    solr.auth : username for authentication
    solr.auth.password : password for authentication


Indexer: finished at 2014-03-03 08:55:35, elapsed: 00:00:03
SolrDeleteDuplicates: starting at 2014-03-03 08:55:35
SolrDeleteDuplicates: Solr url: http://localhost:8983/solr/
SolrDeleteDuplicates: finished at 2014-03-03 08:55:36, elapsed: 00:00:01
crawl finished: crawl
检索抓取到的内容,用浏览器打开 http://localhost:8983/solr/#/collection1/query ,点击Excute Query即可。

Nutch的详细介绍:请点这里
Nutch的下载地址:请点这里

相关阅读

Nutch2.0完全分布式部署配置 http://www.linuxidc.com/Linux/2012-10/71977.htm

Nutch-2.0集群配置 http://www.linuxidc.com/Linux/2012-10/71976.htm

Nutch1.7学习笔记:基本环境搭建及使用 http://www.linuxidc.com/Linux/2013-11/92891.htm

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