1.下载mongodb

╭─lzq@localhost.localdomain ~  
╰─➤  cd /usr/local
╭─lzq@localhost.localdomain /usr/local  
╰─➤  su
密码：
╭─root@localhost.localdomain /usr/local                #下载命令
╰─➤  wget -XGET https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-4.0.2.tgz
--2019-07-19 10:07:14--  https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-4.0.2.tgz
正在连接 127.0.0.1:8118... 已连接。
已发出 Proxy 请求，正在等待回应... 200 OK
长度：84586631 (81M) [application/x-gzip]
正在保存至: “mongodb-linux-x86_64-rhel70-4.0.2.tgz”

100%[======================================>] 84,586,631  5.06MB/s 用时 20s    

2019-07-19 10:07:40 (4.14 MB/s) - 已保存 “mongodb-linux-x86_64-rhel70-4.0.2.tgz” [84586631/84586631])
╭─root@localhost.localdomain /usr/local                #解压命令
╰─➤  tar -zxvf mongodb-linux-x86_64-rhel70-4.0.2.tgz
╭─root@localhost.localdomain /usr/local  
╰─➤  mv mongodb-linux-x86_64-rhel70-4.0.2 mongodb

2.配置文件

2.1mongo配置

在/usr/local/mongodb/bin下创建一个mongodb.conf文件copy如下内容

# 日志文件位置
logpath=/usr/local/mongodb/logs

# 数据库文件位置
dbpath=/usr/local/mongodb/data

# 以追加方式写入日志
logappend=true

# 是否以守护进程方式运行
fork = true

# 默认27017
port = 27017

#绑定ip
bind_ip=127.0.0.1

2.1.1创建日志文件和数据库文件夹

╭─root@localhost.localdomain /usr/local  
╰─➤  touch /usr/local/mongodb/logs
╭─root@localhost.localdomain /usr/local  
╰─➤  mkdir /usr/local/mongodb/data

2.2配置文件详解

参考博客

3.启动

3.1启动命令

在/usr/local/mongodb/bin下执行以下命令

╭─root@localhost.localdomain /usr/local/mongodb/bin  
╰─➤  ./mongod -f mongodb.conf                                               1 ↵
2019-07-19T10:34:20.934+0800 I CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
about to fork child process, waiting until server is ready for connections.
forked process: 23803
child process started successfully, parent exiting

看到child process started successfully, parent exiting并且没有ERROR就启动成功了

3.2遇到的错误

3.2.1 ERROR: child process failed, exited with error number 1

╭─root@localhost.localdomain /usr/local/mongodb/bin  
╰─➤  ./mongod -f mongodb.conf                                               1 ↵
2019-07-19T10:32:28.196+0800 I CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
about to fork child process, waiting until server is ready for connections.
forked process: 23525
ERROR: child process failed, exited with error number 1
To see additional information in this output, start without the "--fork" option.

这是因为将日志文件创建为了日志文件夹

删除日志文件夹创建日志文件
rm -rf /usr/local/mongodb/logs
touch /usr/local/mongodb/logs

3.2.1 ERROR: child process failed, exited with error number 100

╭─root@localhost.localdomain /usr/local/mongodb/bin  
╰─➤  ./mongod -f mongodb.conf                       
2019-07-19T10:45:03.074+0800 I CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
about to fork child process, waiting until server is ready for connections.
forked process: 24158
ERROR: child process failed, exited with error number 100
To see additional information in this output, start without the "--fork" option.
╭─root@localhost.localdomain /usr/local/mongodb/bin  
╰─➤  lsof -i:27017                                                        100 ↵
COMMAND   PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
mongod  23803 root   11u  IPv4 132396      0t0  TCP localhost:27017 (LISTEN)
╭─root@localhost.localdomain /usr/local/mongodb/bin  
╰─➤  kill -9 23803
╭─root@localhost.localdomain /usr/local/mongodb/bin  
╰─➤  ./mongod -f mongodb.conf
2019-07-19T10:45:43.419+0800 I CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
about to fork child process, waiting until server is ready for connections.
forked process: 24192
child process started successfully, parent exiting

这是因为已经启动了mongodb在启动会报的错

解决方法:杀掉启动的mongodb进程然后启动