MongoDB 配置复制集

mkdir -p /data/r0 /data/r1 /data/r2

 

 

1:启动3个实例,且声明实例属于某复制集

./bin/mongod --port 27017 --dbpath /data/r0 --smallfiles --replSet rsa --fork --logpath /var/log/mongo17.log

./bin/mongod --port 27018 --dbpath /data/r1 --smallfiles --replSet rsa --fork --logpath /var/log/mongo18.log

./bin/mongod --port 27019 --dbpath /data/r2 --smallfiles --replSet rsa --fork --logpath /var/log/mongo19.log

 

2:配置

rsconf = {

    _id:'rsa',

    members:

    [

        {_id:0,

        host:'xxxx:27018'

        },

{_id:1,

        host:'xxxx:27019'

        },

{_id:2,

        host:'xxxx:27017'

        },

 

    ]

}

 

 

3: 根据配置做初始化

rs.initiate(rsconf);

这一步如果出现 errMsg:"Quorum check failed because not enough voting nodes responded; required 2 but only the following 1 voting nodes responded: 192.168.2.153:27017; the following nodes did not respond affirmatively: 192.168.2.153:27019 failed with Error connecting to 192.168.2.153:27019 :: caused by :: 由于目标计算机积极拒绝，无法连接。"

 

因此可能会对较新版本的MongoDB进行更改。特别是，默认情况下，MongoDB 3.6及更新版本将绑定到localhost，因此如果要允许远程连接进行复制，则需要将--bind_ip参数传递给mongod实例或net.bindIp在其配置文件中进行设置，rsconf 配置中不能配置IP 写成localhost即可，除非是要外网访问则写成IP

 

4: 添加节点

rs.add('xxxxx:27018');

rs.add('xxxxx:27019');

 

5:查看状态

rs.status();

 

6:删除节点

rs.remove('192.168.1.201:27019');

 

7:主节点插入数据

>use test

>db.user.insert({uid:1,name:'lily'});

 

8:连接secondary查询同步情况

./bin/mongo --port 27019

>use test

>show tables

 

rsa:SECONDARY> show tables;

Sat Aug 17 16:03:55.786 JavaScript execution failed: error: { "$err" : "not master and slaveOk=false", "code" : 13435 }

 

8.1 出现上述错误,是因为slave默认不许读写

>rs.slaveOk();

>show tables