一、环境
操作系统：
# uname -r2.6.32-358.el6.x86_64# cat /etc/issueCentOS 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 192.168.137.148MongoDB shell version: 2.6.4connecting to: 192.168.0.23:27017/testWelcome 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-userServer 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 1.203125GBtest 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 1.203125GBtest 0.203125GBtest1 0.203125GB slave：
# /usr/local/mongodb/bin/mongo --host 192.168.137.148MongoDB shell version: 2.6.4connecting to: 192.168.0.23:27017/testWelcome 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-userServer 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 0.203125GBtest 0.203125GBtest1 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;mesourcessystem.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: 944.1375732421875MBlog 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
4）以web方式查看状态