Ubuntu ElactisSearch 服务搭建

环境

• linux: ubuntu 18.4

• elactissearch: 6.5.3

• jdk: open jdk 1.8

一 服务搭建(压缩包)

1. 下载elastic服务端

   官网下载地址：https://www.elastic.co/cn/downloads/elasticsearch

   wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.5.3.tar.gz
   tar -xzf elasticsearch-6.5.3.tar.gz
   cd elasticsearch-6.5.3/
   

2. 启动服务

   需要新建一个非root账号，elastic不支持root账号启动(参照后面常见问题2)

   ./bin/elasticsearch
   ./bin/elasticsearch -d   #后台启动
   

3. 测试成功

   curl localhost:9200
   

image-20201208160806130.png

二 服务搭建(Docker)

1. 下载镜像

   docker pull elasticsearch:6.5.3
   

2. 运行容器

   docker run -d -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" --name elasticsearch-6.5.3 elasticsearch:6.5.3
   

3. 进入容器

   docker exec -it elasticsearch-6.5.3 /bin/bash
   

4. 安装ik分词器

   ./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.5.3/elasticsearch-analysis-ik-6.5.3.zip
   

5. 修改es配置文件：vim ./config/elasticsearch.yml

   cluster.name: "docker-cluster"
   network.host: 0.0.0.0
   
   # minimum_master_nodes need to be explicitly set when bound on a public IP
   # set to 1 to allow single node clusters
   # Details: https://github.com/elastic/elasticsearch/pull/17288
   discovery.zen.minimum_master_nodes: 1
   
   # just for elasticsearch-head plugin
   http.cors.enabled: true
   http.cors.allow-origin: "*"
   

6. 退出容器

   exit
   

7. 重启容器

   #先停止
   docker stop elasticsearch-6.5.3
   docker start elasticsearch-6.5.3
   

二 常见问题

1. 默认情况下，Elastic 只允许本机访问，如果需要远程访问，可以修改 Elastic 安装目录的config/elasticsearch.yml文件，去掉network.host的注释，将它的值改成0.0.0.0，然后重新启动 Elastic

   network.host: 0.0.0.0
   discovery.type: single-node
   

   关闭防火墙！！！

2. 不允许root启动

   useradd esuser   #新建一个用户
   passwd esuser    #设置密码
   su esuser        #切换用户
   
   #赋值es文件夹权限
   chown -R esuser elasticsearch-6.5.3
   

3. Native controller process has stopped - no new native processes can be started

   • 压缩包形式

     # 指定单节点模式
     discovery.type: single-node
     

   • docker形式

运行时添加 -e "discovery.type=single-node"

 docker run -d -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" --name elasticsearch-6.5.3 elasticsearch:6.5.3
 ```

4. max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

   指定单节点模式即可，解决方案同上3

参考：

官方：https://www.elastic.co/guide/en/elasticsearch/reference/current/targz.html

http://www.ruanyifeng.com/blog/2017/08/elasticsearch.html

https://www.cnblogs.com/gcgc/p/10297563.html