docker部署mongodb集群单机版-(主、从、仲裁)

选定存放 mongodb.key的目录(任意有权限的目录)

#执行
openssl rand -base64 756 -out mongodb.key
#或
openssl rand -base64 700 > mongodb.key

在与mongodb.key同级目录编写docker-compose.yml

vim docker-compose.yml

输入以下内容，保存

version: '3.1'
services:
  mongodb1:
    image: mongo:5.0
    restart: always
    container_name: mongo-master
    privileged: true   #开启权限
    volumes:
      - ./data/db/mongo1/db:/data/db
      - ./data/db/mongo1/configdb:/data/configdb
      - ./mongodb.key:/data/mongodb.key
    ports:
      - 27018:27017
    environment:
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: qsxdr123!
    command: mongod --replSet mongos --keyFile /data/mongodb.key
    entrypoint:
      - bash
      - -c
      - |
        chmod 400 /data/mongodb.key
        chown 999:999 /data/mongodb.key
        exec docker-entrypoint.sh $$@
  mongodb2:
    image: mongo:5.0
    restart: always
    container_name: mongo-slave
    privileged: true   #开启权限
    volumes:
      - ./data/db/mongo2/db:/data/db
      - ./data/db/mongo2/configdb:/data/configdb
      - ./mongodb.key:/data/mongodb.key
    ports:
      - 27019:27017
    environment:
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: qsxdr123!
    command: mongod --replSet mongos --keyFile /data/mongodb.key
    entrypoint:
      - bash
      - -c
      - |
        chmod 400 /data/mongodb.key
        chown 999:999 /data/mongodb.key
        exec docker-entrypoint.sh $$@
  mongodb3:
    image: mongo:5.0
    restart: always
    container_name: mongo-arbiter
    privileged: true
    volumes:
      - ./data/db/mongo3/db:/data/db
      - ./data/db/mongo3/configdb:/data/configdb
      - ./mongodb.key:/data/mongodb.key
    ports:
      - 27020:27017
    environment:
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: qsxdr123!
    command: mongod --replSet mongos --keyFile /data/mongodb.key
    entrypoint:
      - bash
      - -c
      - |
        chmod 400 /data/mongodb.key
        chown 999:999 /data/mongodb.key
        exec docker-entrypoint.sh $$@

安装docker-compose工具

#下载
curl -L https://get.daocloud.io/docker/compose/releases/download/1.29.1/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
#开通执行权限
chmod +x /usr/local/bin/docker-compose
#验证
docker-compose version

执行compose模板

#当前目录执行

docker-compose up -d

查看mongo容器启动情况

docker ps

进入mongo容器

docker exec -it mongo-master /bin/bash

初始化mongo集群

#以认证的方式打开mongo

mongo -u root -p qsxdr123!

#初始化集群

rs.initiate({_id:"mongos",members:[{_id:0,host:"192.168.1.86:27018"},{_id:1,host:"192.168.1.86:27019"},{_id:2,host:"192.168.1.86:27020",arbiterOnly:true}]})

#开启备机可读

rs.secondaryOk()

#查看集群状态

rs.status()

增加mongo-master权重

#依次执行以下命令

config = rs.conf()
config.members[0].priority=2

#配置生效

rs.reconfig(config)

#新配置查看

rs.conf()

退出mongo链接、退出mongo容器

工具链接测试

Studio 3T、Robo 3T、Navicat 16 for MongoDB

e.g. Navicat 16 for MongoDB
#配置链接

#链接成功

e.g. Studio 3T
#配置链接1

#配置链接2

#链接成功

仲裁节点功能验证

1、当前情况

2、模拟主节点宕机

#关闭mongo-master容器

#通过 Studio 3T工具 查看主从节点切换情况

3、主节点宕机恢复演示

#启动mongo-master容器

##通过 Studio 3T工具 查看主从节点切换情况