MogoDB 副本集群

一、环境

centos6.5

node1:172.30.31.114

node2:172.30.31.115

node3:172.30.31.108

node4:172.30.31.109   仲裁点

二、安装

四个节点均需执行

1、安装软件包

#yum install -y mongodb mongodb-server

#echo "this is key file" > /home/keyfile

#chown mongodb /home/keyfile

#chmod 600 /home/keyfile

#vim /etc/mongodb.conf

port = 27017

fork = true

pidfilepath = /var/run/mongodb/mongodb.pid

logpath = /var/log/mongodb/mongodb.log

dbpath =/var/lib/mongodb

journal = true

logappend = true

replSet = mongotest

keyFile = /home/keyfile

auth = true

oplogSize = 10000

#/etc/init.d/mongod start

#chkconfig mongod on

三、创建复制集

1node1 上执行

#mongo admin

>db.runCommand({"replSetInitiate":{"_id":"mongotest","members": [

{"_id":1,"host":172.30.31.114"},

{"_id":2,"host":172.30.31.115"},

{"_id":3,"host":172.30.31.108"}

]}})

>{"info":"Config now saved locally .Should come online in about a minute.","ok":1}

>exit

#mongo admin

mongotest:PRIMARY>use admin

mongotest:PRIMARY>db.addUser("root","mongodb")

创建管理账号，此时node2，node3均使用此账号密码。即使node2，node3使用的管理账号不同，也会被覆盖为此

四、添加仲裁节点

1在主节点上执行

mongotest:PRIMARY>rs.addArb(“172.30.31.109:27017”）

mongotest:PRIMARY>rs.status()     #查看集群状态

注意SECONDARY节点默认没有读权限，执行rs.slaveok()可以开启。仲裁节点只参与投票选举，不参与同步数据。