(二)：Centos7安装mongodb3.4.6步骤

1、下载

　下载mongodb www.mongodb.org  下载最新的stable版

　curl -O https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel62-3.4.6.tgz

2、解压文件

3、移动文件夹

不用编译,本身就是编译后的二进制可执行文件.

进入bin目录下：

注：mongosniff、mongostat、mongotop：用于监控mongodb状态

COMPONENTS
 
  bin/mongod - The database process.     #数据库进程,类似于mysqld
  bin/mongos - Sharding controller.      #分片的控制器
  bin/mongo  - The database shell (uses interactive javascript).    #命令行工具
 
UTILITIES
 
  bin/mongodump         - MongoDB dump tool - for backups, snapshots, etc..   #dump工具,用来备份,快照
  bin/mongorestore      - MongoDB restore a dump                              #还原工具,用来恢复dump的文件,和上面对应
  bin/mongoexport       - Export a single collection to test (JSON, CSV)      #将数据库导出为一个json和csv文件
  bin/mongoimport       - Import from JSON or CSV                             #从json或者csv格式导入,和上面对应
  bin/mongofiles        - Utility for putting and getting files from MongoDB GridFS    #工具用来从Gridfs文件系统中存放或者获取文件
  bin/mongostat         - Show performance statistics                         #显示性能统计信息

#将解压的文件夹重命名为mongodb并移动到/usr/local，目录下

 

4、将bin目录添加到环境变量中

vim /etc/profile

export PATH=/usr/local/mongodb/bin:$PATH:$HOME/bin

source /etc/profile

 

5、创建指定数据文件夹

        创建数据库目录：/data/db

        创建数据库日志目录：/data/log

 

6、启动数据库服务

创建mongodb配置文件,在vi /etc/mongod.conf

[root@mongodb1 bin]# cat /etc/mongod.conf 
port=27017
dbpath=/data/db
logpath=/data/log/mongod.log
fork = true

 分别表示端口号,数据文件目录,log文件,后台运行,详细的其它参数可以使用mongd -h来

使用如下命令启动数据库:

[root@master ~]# mongod -f /etc/mongod.conf
about to fork child process, waiting until server is ready for connections.
forked process: 16111
child process started successfully, parent exiting

启动完成之后就可以使用mongo连接数据库了:

[root@master ~]# mongo
MongoDB shell version v3.4.6
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.6
Server has startup warnings: 
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] 
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] 
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] 
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] 
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] 
> 

 

7、关闭数据库

先到admin下,在使用db.shutdownServer()来关闭数据库,注意mongodb是区分大小写的

[root@master ~]# mongo
MongoDB shell version v3.4.6
connecting to: mongodb://127.0.0.1:27017
MongoDB server version: 3.4.6
Server has startup warnings: 
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] 
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] 
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] 
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] 
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2017-08-03T21:12:31.561+0800 I CONTROL  [initandlisten] 
> use admin
switched to db admin
> db.shutdownServer()
server should be down...
2017-08-03T21:15:18.676+0800 I NETWORK  [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2017-08-03T21:15:18.676+0800 W NETWORK  [thread1] Failed to connect to 127.0.0.1:27017, in(checking socket for error after poll), reason: Connection refused
2017-08-03T21:15:18.676+0800 I NETWORK  [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) failed failed 
> exit
bye
[root@master ~]# 

查看mongodb的进程（已经不存在了）

[root@master ~]# ps -ef |grep mong 
root      16143   9897  0 21:16 pts/0    00:00:00 grep --color=auto mong
[root@master ~]# 

 

注意：8、mongodb非常的占磁盘空间, 刚启动后要占3-4G左右,（查看：启动后 ll /data）

                如果你用虚拟机练习,可能空间不够,导致无法启动.

                可以用 --smallfiles 选项来启动,(mongod --smallfiles -f /etc/mongod.conf)

                将会占用较小空间  400M左右.