Linux系统mongodb主从模式配置
一、环境
操作系统:
# uname -r 2.6.32-358.el6.x86_64 # cat /etc/issue CentOS release 6.4 (Final) Kernel \r on an \m
主:192.168.137.148
从:192.168.137.154
二、主从同步系统时间
#ntpdate ntp.api.bz && hwclock -w --systohc
三、安装
#wget #tar xf mongodb-linux-x86_64-enterprise-rhel62-2.6.4.tgz #mv mongodb-linux-x86_64-enterprise-rhel62-2.6.4 /usr/local/mongodb #[ ! -e /data/mongodb/data ] && mkdir -p /data/mongodb/data || echo ‘/data/mongodb/data is exist!‘ #[ ! -e /data/mongodb/mongodb.log ] && touch /data/mongodb/mongodb.log || echo ‘/data/mongodb/mongodb.log is exist!‘
四、启动服务
mongodb master:
#/usr/local/mongodb/bin/mongod --master --bind_ip=192.168.137.148 --dbpath=/data/mongodb/data --logpath=/data/mongodb/mongodb.log --logappend --port=27017 --fork
mongodb slave:
#/usr/local/mongodb/bin/mongod --slave --bind_ip=192.168.137.154 --source 192.168.137.148:27017 --dbpath=/data/mongodb/data --logpath=/data/mongodb/mongodb.log --logappend --port=27017 --fork
五、测试
master:
# /usr/local/mongodb/bin/mongo --host 192.168.137.148 MongoDB shell version: 2.6.4 connecting to: 192.168.0.23:27017/test Welcome to the MongoDB shell. For interactive help, type "help". For more comprehensive documentation, see http://docs.mongodb.org/ Questions? Try the support group http://groups.google.com/group/mongodb-user Server has startup warnings: 2014-09-24T14:16:58.169+0800 [initandlisten] 2014-09-24T14:16:58.169+0800 [initandlisten] ** WARNING: You are running on a NUMA machine. 2014-09-24T14:16:58.169+0800 [initandlisten] ** We suggest launching mongod like this to avoid performance problems: 2014-09-24T14:16:58.169+0800 [initandlisten] ** numactl --interleave=all mongod [other options] 2014-09-24T14:16:58.169+0800 [initandlisten] > show dbs; #查看数据库 local 1.203125GB test 0.203125GB > use test1; #新建库 switched to db test1 > db.foo.save({"id":123456,"name":‘zhangsan‘}) #插入数据 > db.foo.find({"id":123456}) #查询数据 { "_id" : ObjectId("542277078091089e1cbfecbc"), "id" : 123456, "name" : "zhangsan" } > show dbs; local 1.203125GB test 0.203125GB test1 0.203125GB
slave:
# /usr/local/mongodb/bin/mongo --host 192.168.137.148 MongoDB shell version: 2.6.4 connecting to: 192.168.0.23:27017/test Welcome to the MongoDB shell. For interactive help, type "help". For more comprehensive documentation, see http://docs.mongodb.org/ Questions? Try the support group http://groups.google.com/group/mongodb-user Server has startup warnings: 2014-09-24T14:16:58.169+0800 [initandlisten] 2014-09-24T14:16:58.169+0800 [initandlisten] ** WARNING: You are running on a NUMA machine. 2014-09-24T14:16:58.169+0800 [initandlisten] ** We suggest launching mongod like this to avoid performance problems: 2014-09-24T14:16:58.169+0800 [initandlisten] ** numactl --interleave=all mongod [other options] 2014-09-24T14:16:58.169+0800 [initandlisten] > show dbs; local 0.203125GB test 0.203125GB test1 0.203125GB > use test1; switched to db test1 > db.foo.find({"id":123456}) { "_id" : ObjectId("542277078091089e1cbfecbc"), "id" : 123456, "name" : "zhangsan" }
数据同步成功
六、常见操作
1)在从服务器上查询主服务器的信息
> use local; switched to db local > show collections; me sources system.indexes > db.sources.find() { "_id" : ObjectId("541d8f661037aa7d865374d0"), "host" : "192.168.137.148:27017", "source" : "main", "syncedTo" : { "t" : 1411545377000, "i" : 1 } }
2)在主服务器上查询同步状态
> db.printReplicationInfo(); configured oplog size: 944.1375732421875MB log length start to end: 420339secs (116.76hrs) oplog first event time: Fri Sep 19 2014 19:15:28 GMT+0800 (CST) oplog last event time: Wed Sep 24 2014 16:01:07 GMT+0800 (CST) now: Wed Sep 24 2014 16:01:11 GMT+0800 (CST)
3)在master服务器上查询集合状态
> db.printCollectionStats(); foo { "ns" : "test1.foo", "count" : 1, "size" : 56, "avgObjSize" : 56, "storageSize" : 4096, "numExtents" : 1, "nindexes" : 1, "lastExtentSize" : 4096, "paddingFactor" : 1, "flags" : 1, "totalIndexSize" : 8176, "indexSizes" : { "_id_" : 8176 }, "ok" : 1 } --- system.indexes { "ns" : "test1.system.indexes", "count" : 1, "size" : 64, "avgObjSize" : 64, "storageSize" : 4096, "numExtents" : 1, "nindexes" : 0, "lastExtentSize" : 4096, "paddingFactor" : 1, "flags" : 0, "totalIndexSize" : 0, "indexSizes" : { }, "ok" : 1 } ---
七、主从切换
1)停掉slave服务
#killall mongod
2)删除local数据
#rm -rf /data/mongodb/data/local.*
3)把从服务器以master身份启动
#/usr/local/mongodb/bin/mongod --master --bind_ip=192.168.137.154 --dbpath=/data/mongodb/data --logpath=/data/mongodb/mongodb.log --logappend --port=27017 --fork
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