elasticsearch很火,但是springboot和es之間存在版本問題,如果版本不一致,就會出現如下異常:None of the configured nodes are available....這裏我選用的版本是 springboot 2.1.3 + elasticsearch6.7.1 具體版本之間的問題,可以參考:https://github.com/spring-pro...
一.centos7安裝elasticSearch6.7.1
//強烈建議:安裝進官網下載最新版本!!
https://www.elastic.co/guide/en/elasticsearch/reference/current/zip-targz.html
//選擇文件的方式,有.zip或.gz,這個自己選擇,進行解壓(在線下載,需要耐心等待)
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.7.1.zip
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.7.1.zip.sha512
shasum -a 512 -c elasticsearch-6.7.1.zip.sha512
unzip elasticsearch-6.7.1.zip
cd elasticsearch-6.7.1/
//下載後,進入安裝目錄,我的安裝目錄是/crawler/es/elasticsearch-6.7.1/
cd /crawler/es/elasticsearch-6.7.1/
cd config
vi elasticsearch.yml
//在文件裏面添加如下配置:我們需要將配置設置成所有機器都可以訪問。
network.host: 0.0.0.0
http.port: 9500
transport.tcp.port: 9300
transport.tcp.compress: true
此時基本配置已經做好,在這裏可以準備啓動es,但是需要注意的是,啓動es(6+版本)需要非root賬號,並且jvm的設置可能會有限制問題,在此,我們做如下兩步操作(沒有拋錯的請忽略)
(這裏可以參照https://www.cnblogs.com/phppe...
a.將jvm配置改大:
sudo sysctl -w vm.max_map_count=262144
b.創建額外的用戶(非root用戶),並授權
第一步:liunx創建新用戶 adduser XXX 然後給創建的用戶加密碼 passwd XXX 輸入兩次密碼。
第二步:切換剛纔創建的用戶 su XXX 然後執行elasticsearch 會顯示Permission denied 權限不足。
第三步:給新建的XXX賦權限,chmod 777 * 這個不行,因爲這個用戶本身就沒有權限,肯定自己不能給自己付權限。所以要用root用戶登錄付權限。
第四步:root給XXX賦權限,chown -R XXX /你的elasticsearch安裝目錄。
做了如上操作以後,我們切換到創建用戶,進入安裝目錄並執行./bin/elasticsearch -d (守護線程執行)就好了
二.springBoot2.1.3集成es6.7
上面的es服務器搭建好了以後,集成在springboot上面就會比較簡單了,下面做了一個demo:(參照https://www.cnblogs.com/qdhxh...
pom.xml依賴座標
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-elasticsearch</artifactId>
</dependency>
配置文件
spring:
data:
elasticsearch:
cluster-name: elasticsearch
cluster-nodes: www.iamcrawler.cn:9300 //大哥,這裏寫你自己的....
repositories:
enabled: true
實體類
import com.baomidou.mybatisplus.annotations.TableField;
import com.baomidou.mybatisplus.annotations.TableName;
import com.fasterxml.jackson.annotation.JsonProperty;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.data.elasticsearch.annotations.Document;
/**
* Created by liuliang on 2018/11/1.
*/
@TableName("goddess_user")
@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
@Document(indexName = "wantu_notice_info", type = "doc")
public class GoddessUser {
@JsonProperty("id")
private Long id;
@JsonProperty("code")
private String code;
@TableField("user_name")
@JsonProperty("userName")
private String userName;
@JsonProperty("password")
private String password;
@JsonProperty("mail")
private String mail;
@JsonProperty("phone")
private String phone;
}
Repository
@Component
public interface EsUserRepository extends ElasticsearchRepository<GoddessUser, Long> {
}
Controller
package cn.iamcrawler.crawlergoddess.elasticsearch.user;
import cn.iamcrawler.crawler_common.domain.goddess.GoddessUser;
import cn.iamcrawler.crawlergoddess.mapper.GoddessUserMapper;
import com.baomidou.mybatisplus.mapper.EntityWrapper;
import com.google.common.collect.Lists;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.index.query.MatchQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
/**
* Created by liuliang on 2019/4/8.
*/
@RestController
@RequestMapping("/api/es")
@Slf4j
public class EsUserController {
@Autowired
private GoddessUserMapper userMapper;
@Autowired EsUserRepository esUserRepository;
@PostMapping("/insert/all")
public ResponseEntity loadAllUser(){
List<GoddessUser> users = userMapper.selectList(new EntityWrapper<GoddessUser>());
log.info("users:{}",users);
users.stream().forEach(goddessUser -> {
esUserRepository.save(goddessUser);
});
return ResponseEntity.ok(true);
}
@GetMapping("/search")
public ResponseEntity getByName(String name, Pageable pageable){
//按name進行搜索
MatchQueryBuilder builder = QueryBuilders.matchQuery("userName", name);
//如果實體和數據的名稱對應就會自動封裝,pageable分頁參數
Page<GoddessUser> users = esUserRepository.search(builder, pageable);
//迭代器轉list
ArrayList<GoddessUser> list = Lists.newArrayList(users);
return ResponseEntity.ok(list);
}
}
可以看到,上面一個insert進去以後,在此查詢的時候,就有數值了,postman示例:
[{
"id": 1,
"code": "crawler",
"userName": "liuliang",
"password": "123456",
"mail": "***@sina.com",
"phone": "185***6019"
} ]
至此,從搭建,到集成簡單的demo結束...本文做的時候參考的文檔有:
https://my.oschina.net/u/3187...
https://www.cnblogs.com/phppe...