wls2+docker+elasticsearch集群搭建

wls的安装方法请移步 工具善其事，必先利其器，WIN10 配置wsl2的开发环境

安装 docker-compose

1. 首先确认是否安装了docker-compose
   1.1 看是否安装了docker-compose命令

image.png

1.2 如果没安装，执行下面的命令安装

sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

image.png

1.3 给脚本添加可执行权限

sudo chmod +x /usr/local/bin/docker-compose

2. 创建 docker-compose.yml 文件
   2.1 创建文件

vi docker-compose.yml

2.2 在 docker-compose.yml 中添加如下内容

version: '2.2'
services:
  es01:
    image: docker.elastic.co/elasticsearch/elasticsearch:7.10.1
    container_name: es01
    entrypoint: ["sh", "/apps/docker-entrypoint-es-plugins.sh"]
    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
      - http.cors.enabled=true
      - http.cors.allow-origin=*
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - data01:/usr/share/elasticsearch/data
      - /apps:/apps
    ports:
      - 9200:9200
    networks:
      - elastic
  es02:
    image: docker.elastic.co/elasticsearch/elasticsearch:7.10.1
    container_name: es02
    entrypoint: ["sh", "/apps/docker-entrypoint-es-plugins.sh"]
    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
      - http.cors.enabled=true
      - http.cors.allow-origin=*
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - data02:/usr/share/elasticsearch/data
      - /apps:/apps
    networks:
      - elastic
  es03:
    image: docker.elastic.co/elasticsearch/elasticsearch:7.10.1
    container_name: es03
    entrypoint: ["sh", "/apps/docker-entrypoint-es-plugins.sh"]
    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
      - http.cors.enabled=true
      - http.cors.allow-origin=*
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    volumes:
      - data03:/usr/share/elasticsearch/data
      - /apps:/apps
    networks:
      - elastic
  kibana:
    image: docker.elastic.co/kibana/kibana:7.10.1
    container_name: kibana
    ports:
      - 5601:5601
    volumes:
      - ./kibana/config/:/usr/local/kibana/config/
    environment:
      ELASTICSEARCH_HOSTS: http://es01:9200
      I18N_LOCALE: zh-CN
    links:
      - es01
      - es02
      - es03
    networks:
      - elastic
volumes:
  data01:
    driver: local
  data02:
    driver: local
  data03:
    driver: local

networks:
  elastic:
    driver: bridge

上面的脚本在启动es集群的同时，还会去安装分词器插件，关键代码：entrypoint: ["sh", "/apps/docker-entrypoint-es-plugins.sh"]，它指定了脚本路径的位置，注意这个路径是指容器中的路径，我把这个路径映射到了宿主服务器的相同目录下，即/apps，所以我们在宿主服务器的/apps目录下新建 docker-entrypoint-es-plugins.sh 脚本，这里我在脚本中安装了中文分词器，脚本内容如下：

#!/bin/bash
# setting up prerequisites

bin/elasticsearch-plugin install --batch https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v7.10.1/elasticsearch-analysis-ik-7.10.1.zip
exec /usr/local/bin/docker-entrypoint.sh elasticsearch

3. docker-compose启动elasticsearch集群

docker-compose up

如果要后台启动，就在该命令后面添加参数-d

---

FAQ:

• 如果看到下面的错误日志

image.png

• 解决办法
  在宿主机打开 /etc/sysctl.conf 文件

sudo vim /etc/sysctl.conf

在文件中添加或修改如下内容

vm.max_map_count = 262144

image.png

再执行

sysctl -p

---

制作自己的elasticsearch docker image

1. pull基础镜像

docker pull docker.elastic.co/elasticsearch/elasticsearch:7.10.1

2. 创建 Dockerfile，最好在一个空目录下创建，我这里放在 /apps 目录下

#---------------------------------------------------------------------

# 使用基础镜像elasticsearch:7.10.1
FROM docker.elastic.co/elasticsearch/elasticsearch:7.10.1

# 指定镜像创建者信息
MAINTAINER vampirehgg <<A href="mailto:vampirehgg@qq.com@qq.com">vampirehgg@qq.com>

# 下载IK分词器
RUN bin/elasticsearch-plugin install --batch https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v7.10.1/elasticsearch-analysis-ik-7.10.1.zip

#---------------------------------------------------------------------

3. login docker hub

docker login --username=vampirehgg

4. build 镜像

docker build -t vampirehgg/elasticsearch:7.10.1 /apps

5. push镜像到docker hub

docker push vampirehgg/elasticsearch