MongoDB复制集环境搭建

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环境介绍：
192.168.1.250 主  port=27408
192.168.1.250 仲裁 port=27409
192.168.1.251 备  port=27408


[iyunv@HE4 ~]# tar xvf mongodb-linux-x86_64-2.6.10.tgz
[iyunv@HE4 ~]# mkdir -p /export/mongodb
[iyunv@HE4 ~]# mkdir -p /export/mongodb/bin
[iyunv@HE4 ~]# mkdir -p /export/mongodb/conf
[iyunv@HE4 ~]# mkdir -p /export/mongodb/log
[iyunv@HE4 ~]# mkdir -p /export/mongodb/data
[iyunv@HE4 bin]# cd /root/mongodb-linux-x86_64-2.6.10/bin
[iyunv@HE4 bin]# cp /root/mongodb-linux-x86_64-2.6.10/bin/* /export/mongodb/bin/
[iyunv@HE1 bin]# vi /export/mongodb/conf/mongod.conf

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port=27408 dbpath=/export/mongodb/data logpath=/export/mongodb/log/mongod.log fork=true logappend=true keyFile=/export/mongodb/key/mongod nohttpinterface=true replSet=shard1 [iyunv@HE1 bin]# vi /export/mongodb/conf/arbiter.conf port=27409 dbpath=/export/mongodb/arbiter logpath=/export/mongodb/log/arbiter.log fork=true logappend=true keyFile=/export/mongodb/key/arbiter nohttpinterface=true replSet=shard1

keyfile文件包括:
mongod，arbiter

创建一个生成keyfile的脚本
vi create_key.sh

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cat /dev/urandom | LC_ALL=C tr -dc "[:alnum:]" | fold -w 10 |head -1 >/tmp/key.txt keystring=`cat /tmp/key.txt` echo $keystring >/export/mongodb/key/mongod echo $keystring >/export/mongodb/key/arbiter chmod 600 /export/mongodb/key/*

启动服务器在主
[iyunv@HE3 ~]#/export/mongodb/bin/mongod -f /export/mongodb/conf/mongod.conf
[iyunv@HE3 ~]# /export/mongodb/bin/mongod -f /export/mongodb/conf/arbiter.conf
在从
[iyunv@HE4 ~]#/export/mongodb/bin/mongod -f /export/mongodb/conf/mongod.conf


>config={_id:'shard1',members:[{_id:0,host:'192.168.1.248:27408'},{_id:1,host:'192.168.1.249:27408'},{_id:2,host:'192.168.1.248:27409',arbiterOnly:true}]}



>rs.initiate(config)
初始化rs.initiate(config)，config是之前定义的名

主备库配置好后，备库查询

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shard1:SECONDARY> use test switched to db test shard1:SECONDARY> db.t1.find() error: { "$err" : "not master and slaveOk=false", "code" : 13435 } shard1:SECONDARY> rs.slaveOk() shard1:SECONDARY> db.t1.find() { "_id" : ObjectId("5704c11d3e0651733bfdea23"), "x" : 1 }

rs.stauts()可以看状态，health:1代表健康，stateStr谁是我们的仲裁
想让主库降级成从库，rs.stepDown()