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Linux系统中MongoDB安装及主从配置

来源: 网络整理  作者: 佚名

今天习惯无了了于是在linux来学习起MongoDB安装与数据热备份了,这里我利用了主从服务器来解决数据实时备份的例子,下面我们一起来简单看看吧。
MongoDB 安?,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]# ./mongo
MongoDB shell version: 2.0.0
connecting to: test
> use test;
switched to db test
> exit
bye

[root@zabbix_server bin]# netstat -anlpt | grep mongo
tcp 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]# ./mongo
MongoDB shell version: 2.0.0
connecting 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]# ./mongo
MongoDB shell version: 2.0.0
connecting to: test
> db.foo.find({"id":123456})
{ "_id" : ObjectId("51c3f4b21399022afd992f39"), "id" : 123456, "name" : "lizonggang" }
>
1 在主库上插入数据


> use elaindb
switched 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]# ./mongo
MongoDB shell version: 2.0.0
connecting to: test
> use elaindb
switched 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 0.0625GB
local 0.125GB
test 0.0625GB
2)在从库上查询主库的地址
5


> 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: 47.6837158203125MB
log 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]# ./mongo
MongoDB shell version: 2.0.0
connecting 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" } );
>
>

Tags:主从 系统
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