MongoDB replication set 集群搭建

 用一台机器的不同端口，模拟MongoDB  replication set 集群搭建(最少需要四台)

1:配置文件

Primary(主机)的配置文件(primary.conf)

#mongodb.conf
dbpath=/opt/module/mongodb/rs/data/p0
logpath=/opt/module/mongodb/rs/logs/primary.log

logappend=true
fork = true
port = 27117

noauth = true
#auth = true

#journal=true
nojournal=true

replSet=rs

pidfilepath=/opt/module/mongodb/rs/pids/primary.pid

oplogSize=100
directoryperdb=true

Secondary0(从机一)的配置文件(secondary0.conf)

#mongodb.conf
dbpath=/opt/module/mongodb/rs/data/s0
logpath=/opt/module/mongodb/rs/logs/secondary0.log

logappend=true
fork = true
port = 27118

noauth = true
#auth = true

#journal=true
nojournal=true

replSet=rs

pidfilepath=/opt/module/mongodb/rs/pids/secondary0.pid

oplogSize=100
directoryperdb=true

Secondary1(从机二)的配置文件(secondary1.conf)

dbpath=/opt/module/mongodb/rs/data/s1
logpath=/opt/module/mongodb/rs/logs/secondary1.log

logappend=true
fork = true
port = 27119

noauth = true
#auth = true

#journal=true
nojournal=true

replSet=rs

pidfilepath=/opt/module/mongodb/rs/pids/secondary1.pid

oplogSize=100
directoryperdb=true

arbiter(裁判机)的配置文件(arbiter.conf)

dbpath=/opt/module/mongodb/rs/data/a0
logpath=/opt/module/mongodb/rs/logs/arbiter.log

logappend=true
fork = true
port = 27120

noauth = true
#auth = true

#journal=true
nojournal=true

replSet=rs

pidfilepath=/opt/module/mongodb/rs/pids/arbiter.pid

oplogSize=100
directoryperdb=true

2:建立相应的数据文件夹，日志文件

mkdir p0 s0 s1 a0

touch  primary.log  secondary0.log secondary1.log  arbiter.log

3:启动mongodb数据库。4个分别启动。检查是否启动成功.

bin/mongod --config /opt/module/mongodb/rs/conf/primary.conf
bin/mongod --config /opt/module/mongodb/rs/conf/secondary0.conf
bin/mongod --config /opt/module/mongodb/rs/conf/secondary1.conf
bin/mongod --config /opt/module/mongodb/rs/conf/arbiter.conf

 4：登入数据库  ：

bin/mongo --port 27117

5：初始化数据库 . priority 越大 优先级越高,就是主机。

要进去admin数据库后才能运行初始化函数.(use admin)

rs.initiate(
   {
      _id: "rs",
      members: [
         { _id: 0, host : "192.168.1.202:27117",priority:3 },
         { _id: 1, host : "192.168.1.202:27118",priority:1 },
         { _id: 2, host : "192.168.1.202:27119",priority:1 },
         { _id: 3, host : "192.168.1.202:27120",arbiterOnly:true }
      ]
   }
)

 

 在从机上运行rs.slaveOk() 这样从机才能读数据库.

 6:查看集群状态 rs.isMaster()