参考mongodb官网的安装步骤：
https://docs.mongodb.com/manual/tutorial/install-mongodb-on-red-hat/
添加安装包的配置文件
创建一个空的配置文件：/etc/yum.repos.d/mongodb-org-3.4.repo
操作过程：
[root@localhost ~]# cd /etc/yum.repos.d/
[root@localhost ~]# touch mongodb-org-3.4.repo
进入到文件里面：
[root@localhost ~] vim /etc/yum.repos.d/mongodb-org-3.4.repo
将内容：
[mongodb-org-3.4]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.4/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.4.asc
写到 /etc/yum.repos.d/mongodb-org-3.4.repo ，如图所示:
安装mongodb
[root@localhost yum.repos.d]# yum install -y mongodb-org
待安装完成后，重启service
[root@localhost yum.repos.d]# service mongod start
查看状态
[root@localhost yum.repos.d]# service mongod status
（有的centos版本系统，这里是 systemctl status/start/stop mongod ）
在安装后，启动mongod service后，遇到这样一个问题：
Loaded: loaded (/usr/lib/systemd/system/mongod.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Fri 2017-07-14 17:35:08 CST; 3s ago
Docs: https://docs.mongodb.org/manual
Process: 1570 ExecStart=/usr/bin/mongod $OPTIONS run (code=exited, status=1/FAILURE)
Main PID: 1570 (code=exited, status=1/FAILURE
针对上述的情况，
1.需要修改mongod.conf里面的配置
[root@localhost ~]# vim /etc/mongod.conf
把fork修改为 false ， pidFilePath修改为dbPath的路径，我这里在storage显示为dbPath: /var/lib/mongo，即设置为：
fork: false # fork and run in background
2.有时还需要设置firewall
[root@localhost ~]#firewall-cmd –zone=public –permanent –add-port=27017/tcp
[root@localhost ~]# firewall-cmd –reload
3. 然后重启 Linux PC
[root@localhost ~]# reboot
4.待Linux PC重启完成后，再次重启mongod ，然后查看mongod是否已经成功启动
[root@localhost ~]# service mongod start
[root@localhost ~]# service mongod status
mongod.service - High-performance, schema-free document-oriented database
Loaded: loaded (/usr/lib/systemd/system/mongod.service; enabled; vendor preset: disabled)
Active: active (running) since Fri 2017-07-14 17:43:52 CST; 17h ago
Docs: https://docs.mongodb.org/manual
就这样完成了mongod的安装以及启动其service。
mongod的使用
查看mongod的安装路径
[root@localhost ~]# whereis mongod
mongod: /usr/bin/mongod /etc/mongod.conf~ /etc/mongod.conf /usr/share/man/man1/mongod.1
然后进入到mongod的使用
[root@localhost bin]# 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:
2017-07-14T17:43:53.755+0800 I CONTROL [initandlisten]
2017-07-14T17:43:53.755+0800 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database.
2017-07-14T17:43:53.755+0800 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.
2017-07-14T17:43:53.755+0800 I CONTROL [initandlisten]
2017-07-14T17:43:53.756+0800 I CONTROL [initandlisten]
2017-07-14T17:43:53.756+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is ‘always’.
2017-07-14T17:43:53.756+0800 I CONTROL [initandlisten] ** We suggest setting it to ‘never’
2017-07-14T17:43:53.756+0800 I CONTROL [initandlisten]
2017-07-14T17:43:53.756+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is ‘always’.
2017-07-14T17:43:53.756+0800 I CONTROL [initandlisten] ** We suggest setting it to ‘never’
2017-07-14T17:43:53.756+0800 I CONTROL [initandlisten]
show dbs；
admin 0.000GB
local 0.000GB就这样就可以开始我们的mongodb的使用了。
使用过Oracle，Mysql，却没有使用过mongodb，但是理论都是相通的，相信这个应该也能够很快上手。
接下来学习
1. Python monodb
2. Jmeter monodb
为做接口自动化与性能测试做准备。
感谢网友的分享。
http://blog.csdn.net/bwangk/article/details/53725713
http://www.cnblogs.com/hujiapeng/p/7008006.html