linux下安装MongoDB,配置主从服务

官方网站：
http://www.mongodb.org/

MongoDB 安裝,主从配置

一 MongoDB 安装

[root@zabbix_server src]# wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.0.0.tgz[root@zabbix_server src]# tar xzvf mongodb-linux-x86_64-2.0.0.tgz[root@zabbix_server src]# mv mongodb-linux-x86_64-2.0.0 /usr/local/mongodb[root@zabbix_server src]# mkdir /usr/local/mongodb/data[root@zabbix_server src]# touch /usr/local/mongodb/logs[root@zabbix_server bin]# /usr/local/mongodb/bin/mongod --dbpath=/usr/local/mongodb/data --logpath=/usr/local/mongodb/logs --logappend --port=27017 --fork[root@zabbix_server bin]# ./mongoMongoDB shell version: 2.0.0connecting to: test> use test;switched to db test> exitbye[root@zabbix_server bin]# netstat -anlpt | grep mongotcp 0 0 0.0.0.0:27017 0.0.0.0:* LISTEN 11504/mongod tcp 0 0 0.0.0.0:28017 0.0.0.0:* LISTEN 11504/mongod

注意：
如果报错
-bash: /usr/local/mongodb/bin/mongod: cannot execute binary file
说明你的服务器和mongodb 的版本不对应, 如果服务器是64位,下载x86_64的mongodb ,如果服务器是32位的, 下载i686的mongodb/

二 MongoDB 主从配置

1)实验环境

主:192.168.0.14
从:192.168.0.64

2)时间同步

两台机器做时间同步

[root@zabbix_server src]# ntpdate time.windows.com

3)启动服务

master:192.168.0.14
启动命令

/usr/local/mongodb/bin/mongod --master --dbpath=/usr/local/mongodb/data --logpath=/usr/local/mongodb/logs --logappend --port=27017 --fork

slave:192.168.0.64
启动命令

/usr/local/mongodb/bin/mongod --slave --source 192.168.0.14:27017 --dbpath=/usr/local/mongodb/data --logpath=/usr/local/mongodb/logs --logappend --port=27017 --fork

4)测试主从

在主上插入数据


测试1：
1 在主库上插入数据

[root@cacti bin]# ./mongoMongoDB shell version: 2.0.0connecting to: test> db.foo.save({"id":123456,"name":'lizonggang'})> db.foo.find({"id":123456}){ "_id" : ObjectId("51c3f4b21399022afd992f39"), "id" : 123456, "name" : "lizonggang" }>

2 在从上查看数据(已有在主上插入的数据,说明主从成功)

[root@zabbix_server bin]# ./mongoMongoDB shell version: 2.0.0connecting to: test> db.foo.find({"id":123456}){ "_id" : ObjectId("51c3f4b21399022afd992f39"), "id" : 123456, "name" : "lizonggang" }>

1 在主库上插入数据

> use elaindbswitched to db elaindb> db.test.save({title:"This is a test!"})> db.test.find();{ "_id" : ObjectId("51c3f8f11a90c8da157c7f64"), "title" : "This is a test!" }>

2 在从库上验证数据

[root@zabbix_server bin]# ./mongoMongoDB shell version: 2.0.0connecting to: test> use elaindbswitched to db elaindb> db.test.find();{ "_id" : ObjectId("51c3f8f11a90c8da157c7f64"), "title" : "This is a test!" }> db.printReplicationInfo();this is a slave, printing slave replication info.source: 192.168.0.14:27017     syncedTo: Fri Jun 21 2013 14:59:10 GMT+0800 (CST)         = 9 secs ago (0hrs)>> db.printSlaveReplicationInfo();source: 192.168.0.14:27017     syncedTo: Fri Jun 21 2013 14:59:30 GMT+0800 (CST)         = 16 secs ago (0hrs)>

测试3：

在这个状态下,slave 下是不可以插入数据的

> db.test.save({title:"This is slave test!"})not master

5) 一些查询状态的语句

1)查询库

> show dbs;elaindb 0.0625GBlocal 0.125GBtest 0.0625GB

2)在从库上查询主库的地址

> use local;switched to db local> db.sources.find(){ "_id" : ObjectId("51c3f5dd568d10529950b10d"), "host" : "192.168.0.14:27017", "source" : "main", "syncedTo" : { "t" : 1371797300000, "i" : 1 } }>

3)查看主从复制状态

> db.printReplicationInfo();configured oplog size: 47.6837158203125MBlog length start to end: 1375secs (0.38hrs)oplog first event time: Fri Jun 21 2013 14:30:35 GMT+0800 (CST)oplog last event time: Fri Jun 21 2013 14:53:30 GMT+0800 (CST)now: Fri Jun 21 2013 14:53:32 GMT+0800 (CST)>

4)查看Collection状态

> db.printCollectionStats();foo{    "ns" : "test.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" : "test.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}--->

6)应急

如果在应用中主挂掉了怎么办？
这个情况就需要,停止从库, 把从库以主库的启动命令起来就可以了。

1)停掉从库

kill -9 进程号

2)删除locat下文件

rm mongodb/db/locat.* -rf

3)启动从库

/usr/local/mongodb/bin/mongod --master --dbpath=/usr/local/mongodb/data --logpath=/usr/local/mongodb/logs --logappend --port=27017 --fork

7) MongoDB 增，删，改，查

[root@cacti bin]# ./mongoMongoDB shell version: 2.0.0connecting to: test> db.test.insert({ "Name" : "ymind", "age" : 8 }); #在test数据库里插入数据>> db.test.find({ "Name" : "ymind" } ); #查询数据{ "_id" : ObjectId("51c4187090db4e4751a3cd05"), "Name" : "ymind", "age" : 8 }> db.test.find({ "age" : 8} ); #查询数据{ "_id" : ObjectId("51c4187090db4e4751a3cd05"), "Name" : "ymind", "age" : 8 }>>> db.test.update({"Name" : "ymind"}, { "$set" : { "age" : "5" } } ); #修改数据> db.test.find({ "Name" : "ymind" } );{ "Name" : "ymind", "_id" : ObjectId("51c4187090db4e4751a3cd05"), "age" : "5" }>> db.test.remove({ "Name" : "ymind" } ); #删除数据> db.test.find({ "Name" : "ymind" } );>>