SpringBoot整合elasticsearch(三)

Docker安装elasticsearch

启动注意2点，1是内存，2是线程数（此处进行简单安装，后面会详细补充es文档）

[root@topcheer ~]# docker images
REPOSITORY                TAG                 IMAGE ID            CREATED             SIZE
elasticsearch             latest              874179f19603        12 days ago         771 MB
springbootdemo4docker     latest              cd13bc7f56a0        2 weeks ago         678 MB
docker.io/tomcat          latest              ee48881b3e82        4 weeks ago         506 MB
docker.io/rabbitmq        latest              a00bc560660a        4 weeks ago         147 MB
docker.io/centos          latest              67fa590cfc1c        7 weeks ago         202 MB
docker.io/redis           latest              f7302e4ab3a8        8 weeks ago         98.2 MB
docker.io/rabbitmq        3.7.16-management   3f92e6354d11        2 months ago        177 MB
docker.io/elasticsearch   6.8.0               d0b291d7093b        4 months ago        895 MB
docker.io/hello-world     latest              fce289e99eb9        9 months ago        1.84 kB
docker.io/java            8                   d23bdf5b1b1b        2 years ago         643 MB
[root@topcheer ~]# docker run -e ES_JAVA_OPTS="-Xms256m -Xmx256m" -d -p 9200:9200 -p 9300:9300 --name myES d0b291d7093b
5c4e5ffac1630f57260f739d200050535daf3ab10b1256441400a04fef70434b
[root@topcheer ~]# docker ps -l
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                            NAMES
5c4e5ffac163        d0b291d7093b        "/usr/local/bin/do..."   6 seconds ago       Up 5 seconds        0.0.0.0:9200->9200/tcp, 0.0.0.0:9300->9300/tcp   myES
[root@topcheer ~]# docker ps -l
CONTAINER ID        IMAGE               COMMAND                  CREATED              STATUS                       PORTS               NAMES
5c4e5ffac163        d0b291d7093b        "/usr/local/bin/do..."   About a minute ago   Exited (78) 34 seconds ago                       myES
[root@topcheer ~]# docker logs -tf --tail 200 5c4e5ffac163
2019-10-11T15:33:21.335717000Z OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.

​

发现ES容器停止了

2019-10-11T15:34:04.379276000Z [2019-10-11T15:34:04,372][INFO ][o.e.t.TransportService   ] [om43m7F] publish_address {172.17.0.4:9300}, bound_addresses {[::]:9300}
2019-10-11T15:34:04.432432000Z [2019-10-11T15:34:04,393][INFO ][o.e.b.BootstrapChecks    ] [om43m7F] bound or publishing to a non-loopback address, enforcing bootstrap checks
2019-10-11T15:34:04.441501000Z ERROR: [1] bootstrap checks failed
2019-10-11T15:34:04.441844000Z [1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
2019-10-11T15:34:04.497725000Z [2019-10-11T15:34:04,454][INFO ][o.e.n.Node               ] [om43m7F] stopping ...
2019-10-11T15:34:04.559075000Z [2019-10-11T15:34:04,557][INFO ][o.e.n.Node               ] [om43m7F] stopped
2019-10-11T15:34:04.559461000Z [2019-10-11T15:34:04,557][INFO ][o.e.n.Node               ] [om43m7F] closing ...
2019-10-11T15:34:04.580693000Z [2019-10-11T15:34:04,577][INFO ][o.e.n.Node               ] [om43m7F] closed
2019-10-11T15:34:04.584525000Z [2019-10-11T15:34:04,581][INFO ][o.e.x.m.p.NativeController] [om43m7F] Native controller process has stopped - no new native processes can be started

解决：

在宿主机执行：

sysctl -w vm.max_map_count=262144

原因：

vm.max_map_count参数，是允许一个进程在VMAs拥有最大数量（VMA：虚拟内存地址， 一个连续的虚拟地址空间），当进程占用内存超过时， 直接OOM。

elasticsearch占用内存较高。官方要求max_map_count需要配置到最小262144。

重新启动:

http://192.168.180.113:9200/_cat/health?v
epoch      timestamp cluster        status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1570808429 15:40:29  docker-cluster green           1         1      0   0    0    0        0             0                  -                100.0%

Springboot整合

pom.xml

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>

配置文件

spring
    data:
    elasticsearch:
      cluster-nodes: 192.168.180.113:9300
      cluster-name: docker-cluster

启动类(采用第二种)

/**
 * SpringBoot默认支持两种技术来和ES交互；
 * 1、Jest（默认不生效）
 *  需要导入jest的工具包（io.searchbox.client.JestClient）
 * 2、SpringData ElasticSearch【ES版本有可能不合适】
 *      版本适配说明：https://github.com/spring-projects/spring-data-elasticsearch
 *      如果版本不适配：2.4.6
 *          1）、升级SpringBoot版本
 *          2）、安装对应版本的ES
 *
 *      1）、Client 节点信息clusterNodes；clusterName
 *      2）、ElasticsearchTemplate 操作es
 *      3）、编写一个 ElasticsearchRepository 的子接口来操作ES；
 *  两种用法：https://github.com/spring-projects/spring-data-elasticsearch
 *  1）、编写一个 ElasticsearchRepository
 */
@SpringBootApplication
public class Springboot03ElasticApplication {
​
    public static void main(String[] args) {
        SpringApplication.run(Springboot03ElasticApplication.class, args);
    }
}

发现启动项目报错：

nested exception is java.lang.IllegalStateException: availableProcessors is already set to [4], rejecting [4]

我网上查询了一下，有人是是因为整合了Redis的原因。但是我把Redis相关的配置去掉后，问题还是没有解决，最后有人说是因为netty冲突的问题。 也有人给出了解决方式就是在项目初始化钱设置一下一个属性。在初始化之前加上System.setProperty("es.set.netty.runtime.available.processors", "false");

@Configuration
public class ElasticSearchConfig {
    @PostConstruct
    void init() {
        System.setProperty("es.set.netty.runtime.available.processors", "false");
    }
}

Bo类

@Document(indexName = "topcheer",type = "book" )
@Slf4j
@Data
@Builder
public class Book implements Serializable {
​
    private Integer id;
    private String name;
    private String author;
​
    public Book(String name, String author) {
        this.name = name;
        this.author = author;
    }
​
    public Book(Integer id, String name, String author) {
        this.id = id;
        this.name = name;
        this.author = author;
    }
​
    public Book() {
    }
}

Repository类

public interface BookRepository extends ElasticsearchRepository<Book,Integer> {
​
    //参照
    // https://docs.spring.io/spring-data/elasticsearch/docs/3.0.6.RELEASE/reference/html/
   public List<Book> findByNameLike(String name);
​
}

测试类：

@Autowired
    BookRepository bookRepository;
​
    @Test
    public void test02() {
        Book book = new Book();
        book.setId(1);
        book.setName("西游记");
        book.setAuthor("吴承恩");
        bookRepository.index(book);
​
​
        for (Book book1 : bookRepository.findByNameLike("游")) {
            System.out.println(book1);
        };
​
    }

结果：

2019-10-12 00:27:03.827  INFO --- [           main] Oss6ApplicationTests : Started Oss6ApplicationTests in 17.532 seconds (JVM running for 19.428)
2019-10-12 00:27:03.829 DEBUG --- [           main] ls.restart.Restarter : Creating new Restarter for thread Thread[main,5,main]
Book(id=1, name=西游记, author=吴承恩)
2019-10-12 00:27:04.851 DEBUG --- [       Thread-3] ebApplicationContext : Closing org.springframework.web.context.support.GenericWebApplicationContext@20f5281c, started on Sat Oct 12 00:26:47 CST 2019
2019-10-12 00:27:04.859  INFO --- [       Thread-3] ageListenerContainer : Waiting for workers to finish.
http://192.168.180.113:9200/topcheer/book/_search
{"took":7,"timed_out":false,"_shards":{"total":5,"successful":5,"skipped":0,"failed":0},"hits":{"total":1,"max_score":1.0,"hits":[{"_index":"topcheer","_type":"book","_id":"1","_score":1.0,"_source":{"id":1,"name":"西游记","author":"吴承恩"}}]}}