Linux下简单安装MongoDB

在linux环境下安装mongoDB，安装步骤备忘一下。

到mongoDB的官网下载mongoDB在Linux环境下最新版本安装包，目前最新的版本是3.2.4；由于我的Linux环境是CentOS6.5

32位的系统，所以下载链接是https://fastdl.mongodb.org/linux/mongodb-linux-i686-3.2.4.tgz

下载完成之后，将包mongodb-linux-i686-3.2.4.tgz上传到linux系统的/usr/local目录下；并解压

[root@centOS-1 local]# tar zxvf mongodb-linux-i686-3.2.4.tgz

将解压后的mongoDB的目录重命名为mongoDB

[root@centOS-1 local]# mv mongodb-linux-i686-3.2.4 mongoDB

然后为mongodb创建数据库存放的位置和日志文件,默认是在/data/db下面,为了方便管理，就在mongodb下面建立了相应的目录；我们在mongodb目录下新建一个data目录存放数据、新建一个log目录存放日志，然后在该目录下新建一个日志文件，例如我们命名为mongodb.log

[root@centOS-1 local]# cd mongoDB/
[root@centOS-1 mongoDB]# mkdir data
[root@centOS-1 mongoDB]# mkdir log
[root@centOS-1 mongoDB]# touch mongodb.log
[root@centOS-1 mongoDB]#

进到mongodb下面的bin目录下查看mongodb的帮助文档和我们用到的启动参数

[root@centOS-1 bin]# ./mongod -h

使用mongod命令建立一个mongodb数据库链接，数据库的路径为/mongodb/data，日志路径为/mongodb/log/mongodb.log

；由于我们是32位的linux系统，32bit版本的mongodb默认不开journal记录，需要在运行时得加上–journal参数，同时mongodb自3.0版本后新增了wiredTiger的数据存储引擎，而我们的系统采用的是centos版本，默认的wiredTiger不能用,

那么采用指定引擎为mmapv1；为了在后台开启服务进程，需加上–fork参数。

启动命令如下：

[root@centOS-1 bin]# ./mongod  --dbpath ../data/ --logpath ../log/mongodb.log --journal --storageEngine=mmapv1 --fork
about to fork child process, waiting until server is ready for connections.
forked process: 1823
child process started successfully, parent exiting
[root@centOS-1 bin]#

由此可见mongoDB已经启动成功。

验证mongoDB是否启动成功，mongoDB数据库默认监听的端口是27017，因此使用netstat命令查看此端口是否开启

[root@centOS-1 mongoDB]# netstat -apn|grep 27017
tcp        0      0 0.0.0.0:27017               0.0.0.0:*                   LISTEN      1823/./mongod
unix  2      [ ACC ]     STREAM     LISTENING     14442  1823/./mongod       /tmp/mongodb-27017.sock
[root@centOS-1 mongoDB]#

可以看到mongoDB已经正确开启

关闭mongDB的方式

也可以进入到mongo数据库里面进行操作

./mongo

use admin

db.shutdownServer();

[root@centOS-1 bin]# ./mongo
MongoDB shell version: 3.2.4
connecting to: test
Server has startup warnings:
2016-03-25T04:10:55.928+0800 I CONTROL  [initandlisten]
2016-03-25T04:10:55.928+0800 I CONTROL  [initandlisten] ** WARNING: This 32-bit MongoDB binary is deprecated
2016-03-25T04:10:55.928+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2016-03-25T04:10:55.928+0800 I CONTROL  [initandlisten]
2016-03-25T04:10:55.928+0800 I CONTROL  [initandlisten]
2016-03-25T04:10:55.929+0800 I CONTROL  [initandlisten] ** NOTE: This is a 32 bit MongoDB binary.
2016-03-25T04:10:55.929+0800 I CONTROL  [initandlisten] **       32 bit builds are limited to less than 2GB of data (or less with --journal).
2016-03-25T04:10:55.929+0800 I CONTROL  [initandlisten] **       See http://dochub.mongodb.org/core/32bit 2016-03-25T04:10:55.929+0800 I CONTROL  [initandlisten]
>
> use admin
switched to db admin
> db.shutdownServer();
server should be down...
2016-03-25T04:16:19.549+0800 I NETWORK  [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2016-03-25T04:16:19.552+0800 W NETWORK  [thread1] Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2016-03-25T04:16:19.553+0800 I NETWORK  [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) failed failed
>

设置mongDB开机自启动

编辑/etc/rc.local文件，将mongDB的启动命令写入到此文件中即可

/usr/local/mongoDB/bin/mongod –dbpath /usr/local/mongoDB/data/ –logpath /usr/local/mongoDB/log/mongodb.log –journal –storageEngine=mmapv1 –fork

[root@centOS-1 ~]# vim /etc/rc.local

#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
touch /var/lock/subsys/local
#start mongoDB
/usr/local/mongoDB/bin/mongod  --dbpath /usr/local/mongoDB/data/ --logpath /usr/local/mongoDB/log/mongodb.log  --journal --storageEngine=mmapv1 --fork