1、系统准备

(1)redhat或cnetos6.2以上系统
(2)系统开发包完整
(3)ip地址和hosts文件解析正常
(4)iptables防火墙&SElinux关闭
(5)关闭大页内存机制

root用户下,在vi /etc/rc.local最后添加如下代码

if test -f /sys/kernel/mm/transparent_hugepage/enabled; then
  echo never > /sys/kernel/mm/transparent_hugepage/enabled
fi
if test -f /sys/kernel/mm/transparent_hugepage/defrag; then
   echo never > /sys/kernel/mm/transparent_hugepage/defrag
fi

其他系统关闭参照官方文档:

https://docs.mongodb.com/manual/tutorial/transparent-huge-pages/

为什么要关闭?

Transparent Huge Pages (THP) is a Linux memory management system 
that reduces the overhead of Translation Lookaside Buffer (TLB) 
lookups on machines with large amounts of memory by using larger memory pages.
However, database workloads often perform poorly with THP, 
because they tend to have sparse rather than contiguous memory access patterns. 
You should disable THP on Linux machines to ensure best performance with MongoDB.

修改/etc/security/limits.conf

#*               -       nofile          65535

2、mongodb安装

(1)创建所需用户和组

groupadd -g 800 mongod
useradd -u 801 -g mongod mongod
passwd mongod

(2)创建mongodb所需目录结构

mkdir -p /mongodb/bin
mkdir -p /mongodb/conf
mkdir -p /mongodb/log
mkdir -p /mongodb/data

(3)上传并解压软件到指定位置

cd /root/mongodb-linux-x86_64-rhel62-3.2.16/bin
cp * /mongodb/bin

(4)设置目录结构权限

chown -R mongod:mongod /mongodb

(5)设置用户环境变量

su - mongod
vi .bash_profile
export PATH=/mongodb/bin:$PATH
source .bash_profile

(6)启动mongodb

mongod --dbpath=/mongodb/data --logpath=/mongodb/log/mongodb.log --port=27017 --logappend --fork

(7)登录mongodb

[mongod@server2 ~]$ mongo

注:连接之后会有warning,需要修改(使用root用户)

vim /etc/security/limits.conf 
#*       -       nofile       65535 

(8)重启生效

reboot

(9)使用配置文件

vim /mongodb/conf/mongodb.conf

logpath=/mongodb/log/mongodb.log dbpath=/mongodb/data port=27017 logappend=true fork=true


关闭mongodb mongod -f /mongodb/conf/mongodb.conf --shutdown 使用配置文件启动mongodb mongod -f /mongodb/conf/mongodb.conf

(10)YAML模式:

--
NOTE:
YAML does not support tab characters for indentation: use spaces instead.
--系统日志有关
systemLog:
destination: file
path: "/mongodb/log/mongodb.log"    --日志位置
logAppend: true                     --日志以追加模式记录

--数据存储有关 storage: journal: enabled: true dbPath: "/mongodb/data" --数据路径的位置

-- 进程控制
processManagement: fork: true --后台守护进程 pidFilePath: <string> --pid文件的位置,一般不用配置,可以去掉这行,自动生成到data中

--网络配置有关
net:
bindIp: <ip> -- 监听地址,如果不配置这行是监听在0.0.0.0 port: <port> -- 端口号,默认不配置端口号,是27017

-- 安全验证有关配置 security: authorization: enabled --是否打开用户名密码验证

YAML例子

vim /mongodb/conf/mongo.conf
systemLog:
destination: file
path: "/mongodb/log/mongodb.log"
logAppend: true
storage:
journal:
enabled: true
dbPath: "/mongodb/data/"
processManagement:
fork: true
net:
port: 27017

mongod -f /mongodb/conf/mongodb.conf --shutdown mongod -f /mongodb/conf/mongo.conf