当前时间：2019年3月1日

安装方式：源码安装

参考资料

• 在CentOS7上源码安装MongoDB3.2.7：
  https://www.jianshu.com/p/132c9b2766e0
• 查看MongoDB官网最新版本：
  https://www.mongodb.com/download-center/community
• MongoDB下载地址
  https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-4.0.6.tgz

环境准备

当前目录是所有软件安装包的存放目录
[root@sonny ~]# mkdir /root/mongodb #创建MongoDB程序存放目录
[root@sonny ~]# mkdir /data/mongodata -p #创建数据存放目录
[root@sonny ~]# mkdir /data/log/mongolog -p #创建日志存放目录
[root@sonny ~]# wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-4.0.6.tgz

• 下载地址，先去官网查看最新版本号，然后把下载地址的版本号改为最新版本就可

安装

[root@sonny ~]# tar xf mongodb-linux-x86_64-3.2.7.tgz
[root@sonny ~]# cd mongodb-linux-x86_64-3.2.7/
[root@sonny ~]# cp -r * /root/mongodb   # 将当前所有文件复制

• 为了便于命令启动，需要编辑全局变量PATH

[root@sonny ~]# vim /etc/profile.d/mongodb.sh
export PATH=$PATH:/root/mongodb/bin
[root@sonny ~]# source /etc/profile

• ==环境变量的路径前面的系统变量一定要不能写错，否则就会出现，环境变量就只有一个，其他的都消失了，这是因为这样做是没有追加到系统变量下，而是替换了所有系统变量==

创建配置文件

查看mongod的帮助信息

[root@sonny ~]# mongod --help
Options:

General options:
  -h [ --help ]                         show this usage information
  --version                             show version information
  ......

在mongodb/bin目录下创建配置文件mongodb.conf

[root@sonny ~]# cd mongodb/bin
[root@sonny bin]# vi mongodb.conf
#数据文件存放目录
dbpath = /data/mongodata
#日志文件存放目录
logpath = /data/log/mongolog/mongodb.log
#端口
port = 27017
#以守护程序的方式启用，即在后台运行
fork = true   
nohttpinterface = true

启动服务

[root@sonny bin]# mongod --dbpath=/data/mongodata --logpath=/data/log/mongolog/mongodb.log --logappend --fork
[root@sonny bin]# mongod -f /root/mongodb/bin/mongodb.conf #通过配置文件启动

about to fork child process, waiting until server is ready for connections.
forked process: 7779
child process started successfully, parent exiting

测试

[root@sonny bin]# mongo
MongoDB shell version: 3.2.7
connecting to: test
Welcome to the MongoDB shell.
For interactive help, type "help".
For more comprehensive documentation, see
    http://docs.mongodb.org/
Questions? Try the support group
    http://groups.google.com/group/mongodb-user
Server has startup warnings: 
2019-03-01T11:30:22.390+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2019-03-01T11:30:22.390+0800 I CONTROL  [initandlisten] 
2019-03-01T11:30:22.390+0800 I CONTROL  [initandlisten] 
2019-03-01T11:30:22.390+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2019-03-01T11:30:22.390+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2019-03-01T11:30:22.390+0800 I CONTROL  [initandlisten] 
2019-03-01T11:30:22.390+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2019-03-01T11:30:22.390+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2019-03-01T11:30:22.390+0800 I CONTROL  [initandlisten] 
> show dbs
local  0.000GB
> quit()

消除警告

[root@sonny bin]# vim /etc/rc.local
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
ulimit -u 65535
[root@sonny bin]# echo never > /sys/kernel/mm/transparent_hugepage/enabled
[root@sonny bin]# echo never > /sys/kernel/mm/transparent_hugepage/defrag

• Tip:
  如果发现加入到/etc/rc.local中的内容在重启后没有生效，检查下rc.local的权限及当前系统运行等级

[root@sonny ~]# runlevel
[root@sonny ~]# chmod +x /etc/rc.local

文件限制数调整

修改配置文件 /etc/security/limits.conf，添加配置信息：

* soft nofile 65535
* hard nofile 65535
* soft nproc 32000
* hard nproc 32000

停止mongodb

正常停止方法: kill -2 PID

[root@sonny ~]# ps -ef | grep mongo
root      7779     1  0 11:30 ?        00:00:06 mongod -f /root/mongodb/bin/mongodb.conf
root      7989  7496  0 11:41 pts/0    00:00:00 grep --color=auto mongo
[root@sonny ~]# kill -2 7779

在mongodb内部停止：
>use  admin  
>db.shutdownServer();

再次验证

[root@sonny ~]# mongod -f /root/mongodb/bin/mongodb.conf 
about to fork child process, waiting until server is ready for connections.
forked process: 8011
child process started successfully, parent exiting
[root@sonny ~]# mongo
MongoDB shell version: 3.2.7
connecting to: test
Server has startup warnings: 
2019-03-01T11:42:54.327+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2019-03-01T11:42:54.327+0800 I CONTROL  [initandlisten] 
> exit
bye

清理环境

进入安装包存放目录
[root@sonny ~]# rm -rf redis-5.0.3  #删除解压后文件，留下安装包，以备不时之需

服务化

[root@snails data]# cat > /usr/lib/systemd/system/systemd-mongodb.service << EOF
[Unit]
Description=mongodb
After=network.target
 
[Service]
Type=forking
PIDFile=/data/mongodata/mongod.lock
ExecStart=/root/mongodb/bin/mongod -f /root/mongodb/bin/mongodb.conf
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true
 
[Install]
WantedBy=multi-user.target
EOF
[root@snails data]# systemctl enable systemd-mongodb