Centos7 uses Yum source to install mongodb version 4.2 database

Centos7 uses Yum source to install mongodb version 4.2 database

1. Modify the support of yum installation source for mongodb

Official documents available:

This month is also built with reference to official documents


Formal operation

(1) Modify the repo source file for installing mongoDB, yum
vi /etc/yum.repos.d/mongodb-org-4.2.repo

Add the following information to the file

name=MongoDB Repository
(2) Install and start mongo
yum install mongodb-org -y

This operation will take a certain time, when the execution is completed

Use the following command to enter the client


exmple: the command to operate mongo is as follows (on, off, start, view status)

Start: systemctl start mongod
 Restart: systemctl restart mongod
 Close: systemctl stop mongod
 View running status: systemctl status mongod

Start Mongo by executing systemctl start mongod command

(3) Check whether mongo is on
systemctl status mongod

#The following message indicates mongo is on
● mongod.service - MongoDB Database Server
   Loaded: loaded (/usr/lib/systemd/system/mongod.service; enabled; vendor preset: disabled)
   Active: active (running) since Fri 2020-01-17 19:37:33 CST; 5s ago
     Docs: https://docs.mongodb.org/manual
  Process: 18740 ExecStart=/usr/bin/mongod $OPTIONS (code=exited, status=0/SUCCESS)
  Process: 18738 ExecStartPre=/usr/bin/chmod 0755 /var/run/mongodb (code=exited, status=0/SUCCESS)
  Process: 18734 ExecStartPre=/usr/bin/chown mongod:mongod /var/run/mongodb (code=exited, status=0/SUCCESS)
  Process: 18733 ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb (code=exited, status=0/SUCCESS)
 Main PID: 18743 (mongod)
   CGroup: /system.slice/mongod.service
           └─18743 /usr/bin/mongod -f /etc/mongod.conf

View mongo logs

more /var/log/mongodb/mongod.log
(4) Possible problems in startup

If the error code code=14 appears after startup or in the log, it means that Mongo has been installed on the server before, but the data has not been completely cleared

Solution command: (clear the previous file and start from)

cd /tmp
rm -rf mongodb-27017.sock
systemctl restart mongod
(5) Enable remote access to mongo Library

First, close the mongo Library (the configuration file was not modified at the time of previous startup)

systemctl stop mongod

Enter mongo configuration file

cd /etc/
vim mongo.conf

If there is no vim command, you can install it with the following command

sudo yum install -y vim

Modify the file to the following location (change to

# network interfaces
  port: 27017
  bindIp:  # Enter,:: to bind to all IPv4 and IPv6 addresses or, alternatively, use the net.bindIpAll setting.

Exit after saving

(6) Firewall settings

It is better to use firewall for cenos7

If not, install with the following command

yum install firewalld firewalld-config

Check whether the firewall is on

 firewall-cmd --state

If it is not turned on and it is determined that it is not necessary to turn on, skip the following

View the list of open firewall ports

firewall-cmd --permanent --list-port

If there is no 27017 port, open it

firewall-cmd --zone=public --add-port=27017/tcp --permanent
firewall-cmd --zone=public --add-port=27017/udp --permanent

service iptables restart

firewall-cmd --reload

If it is a ECs, you need to add the 27017 port configuration to the security group configuration

(7) Restart mongo and connect
systemctl start mongod

Check whether it is on

systemctl status mongod
netstat -untlp

Using navicat12 or studio3T connection test

So far, the Mongodb database without password has been set up

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Tags: MongoDB yum firewall Database

Posted on Fri, 17 Jan 2020 08:08:48 -0500 by p0pb0b