基于 Docker 快速部署 Elasticsearch 集群

本是古典何须时尚 2023-06-18 11:52 36阅读 0赞

1.  环境准备
    
    1.  docker、docker-compose安装([https://docs.docker.com/compose/install/][https_docs.docker.com_compose_install])

#docker安装
    curl -sSL https://get.daocloud.io/docker | sh
    
    #docker-compose安装
    curl -L \
    https://get.daocloud.io/docker/compose/releases/download/1.23.2/docker-compose-`uname -s`-`uname -m` \
    > /usr/local/bin/docker-compose
    
    chmod +x /usr/local/bin/docker-compose
    
    #查看安装结果
    docker-compose -v

1.  创建`elasticsearch`数据、日志存放目录

#创建数据/日志目录 这里我们部署3个节点
    mkdir /root/app/elasticsearch/data/{node0,node1,node2} -p
    mkdir /root/app/elasticsearch/logs/{node0,node1,node2} -p
    cd /opt/elasticsearch
    #权限
    chmod 0777 data/* -R && chmod 0777 logs/* -R
    
    #防止JVM报错
    echo vm.max_map_count=262144 >> /etc/sysctl.conf
    sysctl -p

1.  创建docker-compose编排文件

在刚刚新建的目录（/root/app/elasticsearch）创建docker-compose.yml文件,基于镜像elasticsearch:7.4.0

ersion: '2.2'
    services:
      es01:
        image: docker.elastic.co/elasticsearch/elasticsearch:7.4.0
        container_name: es01
        environment:
          - node.name=es01
          - cluster.name=es-docker-cluster
          - discovery.seed_hosts=es02,es03
          - cluster.initial_master_nodes=es01,es02,es03
          - bootstrap.memory_lock=true
          - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
        ulimits:
          memlock:
            soft: -1
            hard: -1
        volumes:
          - ./data/node0:/usr/share/elasticsearch/data
          - ./logs/node0:/usr/share/elasticsearch/logs
        ports:
          - 9200:9200
        networks:
          - elastic
      es02:
        image: docker.elastic.co/elasticsearch/elasticsearch:7.4.0
        container_name: es02
        environment:
          - node.name=es02
          - cluster.name=es-docker-cluster
          - discovery.seed_hosts=es01,es03
          - cluster.initial_master_nodes=es01,es02,es03
          - bootstrap.memory_lock=true
          - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
        ulimits:
          memlock:
            soft: -1
            hard: -1
        volumes:
          - ./data/node1:/usr/share/elasticsearch/data
          - ./logs/node1:/usr/share/elasticsearch/logs
        networks:
          - elastic
      es03:
        image: docker.elastic.co/elasticsearch/elasticsearch:7.4.0
        container_name: es03
        environment:
          - node.name=es03
          - cluster.name=es-docker-cluster
          - discovery.seed_hosts=es01,es02
          - cluster.initial_master_nodes=es01,es02,es03
          - bootstrap.memory_lock=true
          - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
        ulimits:
          memlock:
            soft: -1
            hard: -1
        volumes:
          - ./logs/node2:/usr/share/elasticsearch/data
          - ./logs/node2:/usr/share/elasticsearch/logs
        networks:
          - elastic
    
    networks:
      elastic:
        driver: bridge

参数说明：

*  集群名称：cluster.name=es-docker-cluster
 *  节点名称：node.name=es01
 *  是否可作为主节点：node.master=true
 *  是否存储数据：node.data=true
 *  锁定进程的物理内存地址避免交换（swapped）来提高性能：bootstrap.memory\_lock=true

1.  创建并启动服务

#启动
    docker-compose up -d
    #查看
    docker-compose ps

![clipboard_20191119075336.png][]

可以运行 curl -X GET “localhost:9200/\_cat/nodes?v&pretty” 查看集群信息

![clipboard_20191120112237.png][]

1.  安装Head插件（https://github.com/mobz/elasticsearch-head）

git clone git://github.com/mobz/elasticsearch-head.git

*  下载Node.js([https://nodejs.org/en/download][https_nodejs.org_en_download])

安装完成 在cmd窗口执行node -v查看node.js的版本号 检查是否安装成功

*  安装grunt

npm install -g grunt-cli

通过node.js的包管理器npm安装grunt为全局命宁，grunt是基于Node.js的项目构建工具

*  执行 npm install （不执行该命宁 使用grunt server命令会报错）

npm install

*  启动elasticsearch-head服务

cd ~/app/elasticsearch-head
    grunt server
    #如果后台启动 运行 nohup grunt server &exit

*  停止elasticsearch-head服务

如果是后台运行的elasticsearch-head服务，只能通过kill 端口停止服务

#通过lsof -i找到端口对应的进程（PID）
    lsof -i:9100
    #kill调对应的进程
    kill -9 6076

***注意：***启动如果报一下错误：

1. >>Local Npm module "grunt-contrib-clean" not found. Is it installed?
    2. >> Local Npm module "grunt-contrib-concat" not found. Is it installed?
    3. >> Local Npm module "grunt-contrib-watch" not found. Is it installed?
    4. >> Local Npm module "grunt-contrib-connect" not found. Is it installed?
    5. >> Local Npm module "grunt-contrib-copy" not found. Is it installed?
    6. >> Local Npm module "grunt-contrib-jasmine" not found. Is it installed?
    Warning: Task "connect:server" not found. Use --force to continue.

在elasticsearch-head目录下运行一下命令：

npm install grunt-contrib-clean --registry=https://registry.npm.taobao.org
    npm install grunt-contrib-concat --registry=https://registry.npm.taobao.org
    npm install grunt-contrib-watch --registry=https://registry.npm.taobao.org
    npm install grunt-contrib-connect --registry=https://registry.npm.taobao.org
    npm install grunt-contrib-copy --registry=https://registry.npm.taobao.org
    npm install grunt-contrib-jasmine --registry=https://registry.npm.taobao.org

*  查看效果

![clipboard_20191120094450.png][]

head主控页面是可以显示的，但是显示连接失败，出现了‘集群健康值：未连接’，如何解决这个问题呢？

*  检查是否开启了跨域

出现这种错误首先检查配置文件是否开启了跨域（http.cors.enabled）和http.cors.allow-origin，http.cors.enabled：默认是false，表示是否运行跨域；http.cors.allow-origin：当设置允许跨域，默认为\*,表示支持所有域名，如果我们只是允许某些网站能访问，那么可以使用正则表达式。比如只允许本地地址。 /https?:\\/\\/localhost(:\[0-9\]+)?/

*  如果是自己的服务器的话，还需要做以下修改

#修改elasticsearch-head/_site/app.js
    #找到app-base_uri关键字，并且把localhost修改为自己的ip

![clipboard_20191120095822.png][]

*  再次查看效果

![clipboard_20191120095946.png][]

连接地址成功换成了自己的IP，集群健康值也变成了绿色

**后续文章介绍如何使用…**

[https_docs.docker.com_compose_install]: https://docs.docker.com/compose/install/
[clipboard_20191119075336.png]: https://jessica-1259671334.cos.ap-chengdu.myqcloud.com/blog/mac%E6%95%88%E7%8E%87/clipboard_20191119075336.png
[clipboard_20191120112237.png]: https://jessica-1259671334.cos.ap-chengdu.myqcloud.com/blog/mac%E6%95%88%E7%8E%87/clipboard_20191120112237.png
[https_nodejs.org_en_download]: https://nodejs.org/en/download
[clipboard_20191120094450.png]: https://jessica-1259671334.cos.ap-chengdu.myqcloud.com/blog/mac%E6%95%88%E7%8E%87/clipboard_20191120094450.png
[clipboard_20191120095822.png]: https://jessica-1259671334.cos.ap-chengdu.myqcloud.com/blog/mac%E6%95%88%E7%8E%87/clipboard_20191120095822.png
[clipboard_20191120095946.png]: https://jessica-1259671334.cos.ap-chengdu.myqcloud.com/blog/mac%E6%95%88%E7%8E%87/clipboard_20191120095946.png