Windows下搭建Mongo4.0复制集群

背景：

MongoDB在4.0版本，移除了主从数据库相关配置，官方推荐采用 replica set (副本集群)来代替

根据MongoDB官网文档的描述，当系统数据量较大时，不建议采用 mongodump 和 mongorestore 命令来备份和恢复，使用replica set更为合理。一般是3个MongoDB服务作为一组集群

环境：

Windows10

下载地址：

https://www.mongodb.com/download-center/community

image

选择需要的版本下载见上图

安装文档参考：

https://docs.mongodb.com/manual/tutorial/install-mongodb-on-windows/

安装完成后设置环境变量

image

将MONGO_HOME\bin目录添加到path路径里

image

集群准备：

创建三个目录分别用于存放节点数据和日志

我创建的路径是E:\MongoDB\rs0-2

image

在rs0、rs1、rs2下分别创建配置文件mongod.cfg以及空文件夹data、log

三个mongod.cfg配置文件内容分别为

rs0-mongod.cfg

# mongod.conf

# for documentation of all options, see:

#  http://docs.mongodb.org/manual/reference/configuration-options/

# Where and how to store data.

storage:

  dbPath: E:/MongoDB/rs0/data

  journal:

    enabled: true

#  engine:

#  mmapv1:

#  wiredTiger:

# where to write logging data.

systemLog:

  destination: file

  logAppend: true

  path:  E:/MongoDB/rs0/log/mongod.log

# network interfaces

net:

  port: 27017

  bindIp: 127.0.0.1

#processManagement:

#security:

#operationProfiling:

replication:

  replSetName: rs0

#sharding:

## Enterprise-Only Options:

#auditLog:

#snmp:

rs1-mongod.cfg

# mongod.conf

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# Where and how to store data.
storage:
  dbPath: E:/MongoDB/rs1/data
  journal:
    enabled: true
#  engine:
#  mmapv1:
#  wiredTiger:

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path:  E:/MongoDB/rs1/log/mongod.log

# network interfaces
net:
  port: 27018
  bindIp: 127.0.0.1


#processManagement:

#security:

#operationProfiling:

replication:
  replSetName: rs0
#sharding:

## Enterprise-Only Options:

#auditLog:

#snmp:

rs2-mongod.cfg

# mongod.conf

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# Where and how to store data.
storage:
  dbPath: E:/MongoDB/rs2/data
  journal:
    enabled: true
#  engine:
#  mmapv1:
#  wiredTiger:

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path:  E:/MongoDB/rs2/log/mongod.log

# network interfaces
net:
  port: 27019
  bindIp: 127.0.0.1


#processManagement:

#security:

#operationProfiling:

replication:
  replSetName: rs0
#sharding:

## Enterprise-Only Options:

#auditLog:

#snmp:

分别进入rs0,rs1,rs2目录启动mongod启动命令为：

mongod --config mongod.cfg

启动完成后进入mongo安装目录启动mongo客户端连接r0服务的端口27017

成功连接后，开始初始化集群

集群初始化

在客户端命令行窗口输入如下配置

rsconf = {
  _id: "rs0",
  members: [
    {
     _id: 0,
     host: "127.0.0.1:27017"
    },
    {
     _id: 1,
     host: "127.0.0.1:27018"
    },
    {
     _id: 2,
     host: "127.0.0.1:27019"
    }
   ]
}

执行命令

rs.initiate( rsconf )

输入命令（查看集群状态）

rs.conf()

可见rs0为主节点，rs1和rs2为复制节点

End