esjava 同步mysql_Elasticsearch和mysql数据同步(elasticsearch-jdbc)
1、介紹
對mysql、oracle等數據庫數據進行同步到ES有三種做法:一個是通過elasticsearch提供的API進行增刪改查,一個就是通過中間件進行數據全量、增量的數據同步,另一個是通過收集日志進行同步。
明顯通過API增上改查比較麻煩,這里介紹的是利用中間件進行數據同步。
2、常用的同步中間件的介紹和對比
都可以完成數據同步;
elasticsearch-jdbc更通用,GitHub活躍度很高;
elasticsearch-river-mysql 自2013年后便不再更新;
go-mysql-elasticsearch仍處理開發不穩定階段;
elasticsearch-river-jdbc和elasticsearch-river-mysql都不支持對刪掉的數據進行同步,go-mysql-elasticsearch希望可以改善這個問題。
總的來說,elasticsearch-jdbc更適合使用,對于刪掉的數據可以采用API進行同步,或者在數據中不進行物理刪除可以避免該問題的出現。
3、elasticsearch的安裝
這里使用的是2.3.2版本,可以到官方網站下載,這里不提供官方地址,或者訪問http://download.csdn.net/detail/carboncomputer/9648227?下載本篇文章所用到的兩個安裝包。
得到elasticsearch-2.3.2.tar.gz
[zsz@zsz ~]$ tar -zxvf?elasticsearch-2.3.2.tar.gz
[zsz@zsz ~]$?mv?elasticsearch-2.3.2 /usr/local/elasticsearch-2.3.2
啟動elasticsearch服務
[zsz@zsz ~]$./bin/elasticsearch
另外,bin/elasticsearch -d(后臺運行);
如何需要修改配置,可以查看/elasticsearch-2.3.2/config/elasticsearch.yml;
查看節點情況:
[zsz@zsz downloads]$ curl 'localhost:9200/_cat/nodes?v'
host????? ip??????? heap.percent ram.percent load node.role master name
127.0.0.1 127.0.0.1?????????? 12????????? 79 0.18 d???????? *????? node-1
查看索引,當前為無索引:
[zsz@zsz downloads]$? curl 'localhost:9200/_cat/indices?v'
health status index pri rep docs.count docs.deleted store.size pri.store.size
創建索引:
[zsz@zsz downloads]$ curl -XPUT 'localhost:9200/customer?pretty'
{
"acknowledged" : true
}
[zsz@zsz downloads]$? curl 'localhost:9200/_cat/indices?v'
health status index??? pri rep docs.count docs.deleted store.size pri.store.size
yellow open?? customer?? 5?? 1????????? 0??????????? 0?????? 650b?????????? 650b
增加索引并搜索:
[zsz@zsz downloads]$ curl -XPUT 'localhost:9200/customer/external/1?pretty' -d '
>???????? {
>?????????? "name": "John Doe"
>???????? }'
{
"_index" : "customer",
"_type" : "external",
"_id" : "1",
"_version" : 1,
"_shards" : {
"total" : 2,
"successful" : 1,
"failed" : 0
},
"created" : true
}
可以看到,一個新的文檔在customer索引和external類型中被成功創建。文檔也有一個內部id 1, 這個id是在增加索引的時候指定的。下面來檢索這個記錄:
[zsz@zsz downloads]$ curl -XGET 'localhost:9200/customer/external/1?pretty'
{
"_index" : "customer",
"_type" : "external",
"_id" : "1",
"_version" : 1,
"found" : true,
"_source" : {
"name" : "John Doe"
}
}
[zsz@zsz downloads]$ curl 'localhost:9200/customer/_search?q=John'
{"took":2,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":0.19178301,"hits":[{"_index":"customer","_type":"external","_id":"1","_score":0.19178301,"_source":
{
"name": "John Doe"
}}]}}
更新這個索引:
[zsz@zsz downloads]$ curl -XPOST 'localhost:9200/customer/external/1/_update?pretty' -d '
>???????? {
>?????????? "doc": { "name": "Jane Doe Haha" }
>???????? }'
{
"_index" : "customer",
"_type" : "external",
"_id" : "1",
"_version" : 2,
"_shards" : {
"total" : 2,
"successful" : 1,
"failed" : 0
}
}
[zsz@zsz downloads]$ curl -XGET 'localhost:9200/customer/external/1?pretty'
{
"_index" : "customer",
"_type" : "external",
"_id" : "1",
"_version" : 2,
"found" : true,
"_source" : {
"name" : "Jane Doe Haha"
}
}
刪除該索引:
[zsz@zsz downloads]$ curl -XDELETE 'localhost:9200/customer/external/1?pretty'
{
"found" : true,
"_index" : "customer",
"_type" : "external",
"_id" : "1",
"_version" : 3,
"_shards" : {
"total" : 2,
"successful" : 1,
"failed" : 0
}
}
[zsz@zsz downloads]$ curl -XGET 'localhost:9200/customer/external/1?pretty'
{
"_index" : "customer",
"_type" : "external",
"_id" : "1",
"found" : false
}
ES對外接口
JAVA API接口
http://www.ibm.com/developerworks/library/j-use-elasticsearch-java-apps/index.html
RESTful API接口
常見的增、刪、改、查操作實現:
http://blog.csdn.net/laoyang360/article/details/51931981
3、elasticsearch-jdbc的安裝配置
需要的安裝包:elasticsearch-jdbc-2.3.2.0-dist.zip,它是與elasticsearch-2.3.2.tar.gz相對應的,其他版本會出錯。
[zsz@zsz downloads]$ vi /etc/profile
#增加elasticsearch-jdbc插件的環境變量
export JDBC_IMPORTER_HOME=/home/downloads/elasticsearch-jdbc-2.3.2.0
[zsz@zsz downloads]$ source /etc/profile
創建同步:
[zsz@zsz downloads]$ mkdir /odbc_es
[zsz@zsz downloads]$ cd ?/odbc_es
[zsz@zsz?odbc_es]$ vi?mysql_import_es.sh
#!/bin/sh
bin=$JDBC_IMPORTER_HOME/bin
lib=$JDBC_IMPORTER_HOME/lib
echo '{
"type" : "jdbc",
"jdbc": {
"elasticsearch.autodiscover":true,
"elasticsearch.cluster":"elasticsearch",##需要與/elasticsearch-2.3.2/config/elasticsearch.yml的配置對應
"url":"jdbc:mysql://***:3306/**",
"user":"**",
"password":"**",
"sql":"select * from news",
"elasticsearch" : {
"host" : "127.0.0.1",
"port" : 9300
},
"index" : "myindex",
"type" : "mytype"
}
}'| java \
-cp "${lib}/*" \
-Dlog4j.configurationFile=${bin}/log4j2.xml \
org.xbib.tools.Runner \
org.xbib.tools.JDBCImporter
##根據個人項目情況填寫以上的地址
運行數據同步腳本mysql_import_es.sh:
[zsz@zsz?odbc_es]$?./mysql_import_es.sh
查看是否同步成功:
[zsz@zsz odbc_es]$ curl 'localhost:9200/_cat/indices?v'
health status index??? pri rep docs.count docs.deleted store.size pri.store.size
yellow open?? myindex??? 5?? 1??????? 163??????????? 0??? 146.5kb??????? 146.5kb
yellow open?? customer?? 5?? 1????????? 0??????????? 0?????? 795b?????????? 795b
[zsz@zsz odbc_es]$ curl -XGET 'http://127.0.0.1:9200/myindex/mytype/_search?pretty'
{
"took" : 9,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"failed" : 0
}
......
說明同步數據成功。
問題與解決:
1、提示no cluster nodes available, check settings
解決:請查看/elasticsearch-2.3.2/config/elasticsearch.yml。一般都是該文件配置錯誤造成的,比如單機模式的,配置了node節點,或者cluster.name錯誤。
有問題請與我聯系。
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