官方網址：https://www.elastic.co/products/elasticsearch/
1、支持中文分詞
2、支持多種數據源的全文檢索引擎
3、分布式
4、基於lucene的開源搜索引擎
5、Restful api
smartcn, 默認的中文分詞 ：https://github.com/elasticsearch/elasticsearch-analysis-smartcn
mmseg ：https://github.com/medcl/elasticsearch-analysis-mmseg
ik：https://github.com/medcl/elasticsearch-analysis-ik
pinyin, 拼音分詞可用於輸入拼音提示中文 ：https://github.com/medcl/elasticsearch-analysis-pinyin
stconvert, 中文簡繁體互換 ：https://github.com/medcl/elasticsearch-analysis-stconvert
elasticsearch-servicewrapper：https://github.com/elasticsearch/elasticsearch-servicewrapper
Elastic HQ，elasticsearch的監控工具：http://www.elastichq.org
elasticsearch-rtf ：https://github.com/medcl/elasticsearch-rtf
服務器：Linux（centos 6.x）
java環境：JDK 1.8.0
elasticsearch：2.3.1
elasticsearch-jdbc（數據源插件）：2.3.1
IK Analysis（中文分詞插件）：1.9.1
yum install java-1.8.0
#創建.repo文件（elasticsearch.repo） cat >> /etc/yum.repos.d/elasticsearch.repo << EOF [elasticsearch-2.x] name=Elasticsearch repository for 2.x packages baseurl=https://packages.elastic.co/elasticsearch/2.x/centos gpgcheck=1 gpgkey=https://packages.elastic.co/GPG-KEY-elasticsearch enabled=1 EOF #導入key： rpm --import https://packages.elastic.co/GPG-KEY-elasticsearch yum install elasticsearch
如果是用root賬號啟動，會報以下錯誤
Exception in thread "main" java.lang.RuntimeException: don't run elasticsearch as root. at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:93) at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:144) at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:285) at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:35) Refer to the log for complete error details.
這是出於系統安全考慮設置的條件。由於ElasticSearch可以接收用戶輸入的腳本並且執行，為了系統安全考慮， 建議創建一個單獨的用戶用來運行ElasticSearch
groupadd elsearch useradd elsearch -g elsearch -p elasticsearch
mkdir -p /data/elasticsearch/data mkdir -p /data/elasticsearch/logs chown -R elsearch:elsearch /data/elasticsearch/data chown -R elsearch:elsearch /data/elasticsearch/logs
#集群名（同一個集群，名稱必須相同） cluster.name: my-application #服務節點名（每個服務節點不一樣） node.name: node-1 #數據存儲路徑 path.data: /data/elasticsearch/data #服務日志路徑 path.logs: /data/elasticsearch/logs #服務ip地址 network.host: 0.0.0.0 #服務端口 http.port: 9200
wget http://repos.fedorapeople.org/repos/dchen/apache-maven/epel-apache-maven.repo -O /etc/yum.repos.d/epel-apache-maven.repo yum install apache-maven
git clone https://github.com/medcl/elasticsearch-analysis-ik
mvn clean mvn compile mvn package unzip target/releases/elasticsearch-analysis-ik-*.zip cp -r target/releases/ /usr/share/elasticsearch/plugins/ik
配置：/usr/share/elasticsearch/plugins/ik/config/ik/IKAnalyzer.cfg.xml
<entry key="ext_dict">custom/mydict.dic;custom/single_word_low_freq.dic;custom/sougou.dic</entry>
將jar包復制到Elasticsearch的plugins/analysis-ik 目錄下，再把解壓出的ik目錄（配置和詞典等），復制到Elasticsearch的config 目錄下。然後編輯配置文件elasticsearch.yml ，在後面加一行：
index.analysis.analyzer.ik.type : "ik"
重啟service elasticsearch restart
然後錄入數據，創建索引
wget http://xbib.org/repository/org/xbib/elasticsearch/importer/elasticsearch-jdbc/2.3.1.0/elasticsearch-jdbc-2.3.1.0-dist.zip unzip elasticsearch-jdbc-2.3.1.0-dist.zip
export JDBC_IMPORTER_HOME=/elasticsearch-jdbc-2.3.1.0
bin=$JDBC_IMPORTER_HOME/bin
lib=$JDBC_IMPORTER_HOME/lib
echo '{
"type" : "jdbc",
"jdbc": {
"url":"jdbc:mysql://127.0.0.1:3306/dbtest",
"user":"root",
"password":"123456",
"sql":"select * from test_tb",
"index" : "customer",
"type" : "external"
}}' | java \
-cp "${lib}/*" \
-Dlog4j.configurationFile=${bin}/log4j2.xml \
org.xbib.tools.Runner \
org.xbib.tools.JDBCImporter
curl 'localhost:9200/customer/external/_search?pretty&q=*'
#安裝elasticsearch curl -OL https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.4.2.zip cd $ES_HOME unzip path/to/elasticsearch-1.4.2.zip #安裝JDBC插件 ./bin/plugin --install jdbc --url http://xbib.org/repository/org/xbib/elasticsearch/plugin/elasticsearch-river-jdbc/1.4.0.6/elasticsearch-river-jdbc-1.4.0.6-plugin.zip #下載mysql driver curl -o mysql-connector-java-5.1.33.zip -L 'http://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.33.zip/from/http://cdn.mysql.com/' cp mysql-connector-java-5.1.33-bin.jar $ES_HOME/plugins/jdbc/ chmod 644 $ES_HOME/plugins/jdbc/* #啟動elasticsearch ./bin/elasticsearch #停止river curl -XDELETE 'localhost:9200/_river/my_jdbc_river/'
curl -XPUT 'localhost:9200/_river/my_jdbc_river/_meta' -d '{
"type" : "jdbc",
"jdbc" : {
"url" : "jdbc:mysql://localhost:3306/test",
"user" : "",
"password" : "",
"sql" : "select * from orders",
"index" : "myindex",
"type" : "mytype",
...
}
}'
如果一個數組傳遞給jdbc字段，多個river源也是可以的
curl -XPUT 'localhost:9200/_river/my_jdbc_river/_meta' -d '{
<river parameters>
"type" : "jdbc",
"jdbc" : [ {
<river definition 1>
}, {
<river definition 2>
} ]
}'
curl -XPUT 'localhost:9200/_river/my_jdbc_river/_meta' -d '{
"type" : "jdbc",
"jdbc" : {
"driver" : "com.mysql.jdbc.Driver",
"url" : "jdbc:mysql://localhost:3306/test",
"user" : "root",
"password" : "123456",
"sql" : "select * from test.student;",
"interval" : "30",
"index" : "test",
"type" : "student"
}
}’
查看ES是否已經同步了這些數據
curl -XGET 'localhost:9200/test/student/_search?pretty&q=*'
官網地址：https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-aliases.html
參考
https://www.elastic.co/guide/en/elasticsearch/guide/current/empty-search.html
https://github.com/medcl/elasticsearch-analysis-ik
http://blog.csdn.net/clementad/article/details/46898013
https://endymecy.gitbooks.io/elasticsearch-guide-chinese/content/elasticsearch-river-jdbc.html
https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-aliases.html
https://github.com/jprante/elasticsearch-jdbc
http://www.voidcn.com/blog/wojiushiwo987/article/p-6058574.html
http://leotse90.com/2015/11/11/ElasticSearch%E4%B8%8EMySQL%E6%95%B0%E6%8D%AE%E5%90%8C%E6%AD%A5%E4%BB%A5%E5%8F%8A%E4%BF%AE%E6%94%B9%E8%A1%A8%E7%BB%93%E6%9E%84/
http://www.jianshu.com/p/638ff7b848cc
http://www.cnblogs.com/buzzlight/p/logstash_elasticsearch_kibana_log.html
http://xxxxxx/Linuxjc/1167516.html TechArticle
