SpringBoot整合Elasticsearch

1、Docker安装Elasticsearch

1.1、拉取elasticsearch镜像

docker pull elasticsearch:7.12.1

[root@VM-8-3-centos ~]# docker pull elasticsearch:7.12.1
7.12.1: Pulling from library/elasticsearch
7a0437f04f83: Pull complete 
ed4a47ec20b2: Pull complete 
74e4f4b7e738: Pull complete 
ef2a2418a5f4: Pull complete 
646dbf47f747: Pull complete 
3ffbf21442fc: Pull complete 
e04f00c0d464: Pull complete 
Digest: sha256:622f854572780281bc85b5fde33be27e99670941ed8b7eea5ba4aaf533fa64ec
Status: Downloaded newer image for elasticsearch:7.12.1
docker.io/library/elasticsearch:7.12.1
[root@VM-8-3-centos ~]# docker images
REPOSITORY      TAG       IMAGE ID       CREATED         SIZE
redis           latest    3edbb69f9a49   2 weeks ago     117MB
nginx           latest    f6987c8d6ed5   7 months ago    141MB
mysql           latest    3218b38490ce   7 months ago    516MB
elasticsearch   7.12.1    41dc8ea0f139   15 months ago   851MB
java            8         d23bdf5b1b1b   5 years ago     643MB

1.2、启动镜像

docker run -d -p 9200:9200 -p 9300:9300 --name myElasticsearch -e ES_JAVA_OPTS="-Xms256m -Xmx256m" -e "discovery.type=single-node" elasticsearch:7.12.1

docker run -d   # 后台运行
-p 9200:9200 -p 9300:9300   #端口映射
--name myElasticsearch  # 镜像名称
-e ES_JAVA_OPTS="-Xms256m -Xmx256m"  #es默认使用内存较大，设置es所使用的的内存，否则es大概率无法启动
-e "discovery.type=single-node" #设置为单节点模式
elasticsearch:7.12.1 # 镜像名称

这样elasticsearch就成功启动了！

[root@VM-8-3-centos ~]# docker ps
CONTAINER ID   IMAGE                  COMMAND                  CREATED         STATUS         PORTS                                                                                 NAMES
91ea03d8b573   elasticsearch:7.12.1   "/bin/tini -- /usr/l…"   2 minutes ago   Up 2 minutes   0.0.0.0:9200->9200/tcp, :::9200->9200/tcp, 0.0.0.0:9300->9300/tcp, :::9300->9300/tcp   myElasticsearch

1.3、访问Elasticsearch服务

服务器放通安全组

访问elasticsearch服务

2、整合Elasticsearch

2.1、SpringBoot项目引入依赖

此处使用SpringBoot项目，SpringBoot版本为2.5.5

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

Maven插件查看依赖信息，发现elasticsearch已经成功导入

2.2、配制elasticsearch

spring:
  # Elasticsearch
  elasticsearch:
    rest:
      uris: http://119.***.***.208:9200