Linux系统mongodb主从模式配置

t4fewq

一、环境

    操作系统：

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# uname -r 2.6.32-358.el6.x86_64 # cat /etc/issue CentOS release 6.4 (Final) Kernel  on an m

    主：192.168.137.148

    从：192.168.137.154

二、主从同步系统时间

1	#ntpdate ntp.api.bz && hwclock -w --systohc

三、安装

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#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：

1	#/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：

1	#/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：

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# /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：

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# /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

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> 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

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> 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

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> 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

1	#killall mongod

2)删除local数据

1	#rm -rf /data/mongodb/data/local.*

3）把从服务器以master身份启动

1	#/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