30分钟完成MongoDB复制集环境搭建
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
# tar xvf mongodb-linux-x86_64-2.6.10.tgz
# mkdir -p /export/mongodb
# mkdir -p /export/mongodb/bin
# mkdir -p /export/mongodb/conf
# mkdir -p /export/mongodb/log
# mkdir -p /export/mongodb/data
# cd /root/mongodb-linux-x86_64-2.6.10/bin
# cp /root/mongodb-linux-x86_64-2.6.10/bin/* /export/mongodb/bin/
# vi /export/mongodb/conf/mongod.conf
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
# 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
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 $keystring >/export/mongodb/key/arbiter
chmod 600 /export/mongodb/key/*
启动服务器在主
#/export/mongodb/bin/mongod -f /export/mongodb/conf/mongod.conf
# /export/mongodb/bin/mongod -f /export/mongodb/conf/arbiter.conf
在从
#/export/mongodb/bin/mongod -f /export/mongodb/conf/mongod.conf
>config={_id:'shard1',members:[{_id:0,host:'192.168.1.248:27408'},{_id:1,host:'192.168.1.249:27408'},{_id:2,host:'192.168.1.248:27409',arbiterOnly:true}]}
>rs.initiate(config)
初始化rs.initiate(config)，config是之前定义的名
主备库配置好后，备库查询
shard1:SECONDARY> use test
switched to db test
shard1:SECONDARY> db.t1.find()
error: { "$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()
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