docker运行elasticsearch

拉取镜像

docker pull docker.io/library/elasticsearch:7.16.1

创建并启动容器 编写docker-compose.yml

version: '3.3'
services:
  elasticsearch:
    image: elasticsearch:7.16.1  #镜像
    container_name: elasticsearch  #定义容器名称
    restart: always  #开机启动，失败也会一直重启
    environment:
      - "cluster.name=elasticsearch" #设置集群名称为elasticsearch
      - "discovery.type=single-node" #以单一节点模式启动
      - "ES_JAVA_OPTS=-Xms128m -Xmx256m" #设置使用jvm内存大小
    volumes:
      - /data/elasticsearch/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml
      - /data/elasticsearch/data:/usr/share/elasticsearch/data
      - /data/elasticsearch/plugins:/usr/share/elasticsearch/plugins
      - /data/elasticsearch/logs:/usr/share/elasticsearch/logs
    ports:
      - '9200:9200'
      - '9300:9300'

将配置文件从容器中复制到宿主机

docker cp es:/usr/share/elasticsearch/config/elasticsearch.yml ./elasticsearch.yml

修改yml文件

cluster.name: "docker-cluster"
network.host: 0.0.0.0

# 配置远程访问
http.host: 0.0.0.0

# 因为elasticsearch与elasticsearch-head工具是前后端分离项目,所以需要处理跨域问题
http.cors.enabled: true
http.cors.allow-origin: "*"

# 开启账户密码验证
http.cors.allow-headers: Authorization,X-Requested-With,Content-Length,Content-Type
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true

将修改后的文件覆盖到容器内

docker cp ./elasticsearch.yml es:/usr/share/elasticsearch/config/elasticsearch.yml

重启elasticsearch

docker restart es

设置用户名密码

docker exec -it es bash

# 设置elastic，apm_system，kibana，kibana_system，logstash_system，beats_system，remote_monitoring_user 这些用户的密码
bin/elasticsearch-setup-passwords interactive

如果启动报错（查看日志docker logs -f 容器id，发现异常日志）

Error opening log file ‘logs/gc.log’: Permission denied