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The following tutorial describes how to install MongoDB system Centos 8.
The whole is simple and comes down to a few simple commands wykonanaia.

In previous entries we described the installation process for Ubuntu 18.04 which is under this entry.

For starters, we create a repository:

nano /etc/yum.repos.d/mongodb.repo

its content:

[mongodb-org-4.2]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/development/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.2.asc

Save the file and install the same service kodonujemy:

dnf install mongodb-org

Run it and add to autostart:

systemctl start mongod
systemctl enable mongod

Check the status of services:

systemctl status mongod

Score:

? mongod.service - MongoDB Database Server
   Loaded: loaded (/usr/lib/systemd/system/mongod.service; enabled; vendor preset: disabled)
   Active: active (running) since my 2020-01-03 03:59:12 EDT; 5min ago
     Docs: https://docs.mongodb.org/manual
  Process: 737 ExecStart=/usr/bin/mongod $OPTIONS (code=exited, status=0/SUCCESS)
  Process: 735 ExecStartPre=/usr/bin/chmod 0755 /var / run / mongodb (code=exited, status=0/SUCCESS)
  Process: 732 ExecStartPre=/usr/bin/chown mongod:mongod / var / run / mongodb (code=exited, status=0/SUCCESS)
  Process: 726 ExecStartPre=/usr/bin/mkdir -p /var/run/mongodb (code=exited, status=0/SUCCESS)
 Main PID: 914 (mongod)
   Memory: 216.1M
   CGroup: /system.slice/mongod.service
           ??914 /usr/bin/mongod --auth -f /etc/mongod.conf

Oct 28 03:58:14 centos8 systemd[1]: Starting MongoDB Database Server...
Oct 28 03:58:28 centos8 mongod[737]: about to fork child process, waiting until server is ready for connections.
Oct 28 03:58:28 centos8 mongod[737]: forked process: 914
Oct 28 03:59:12 centos8 mongod[737]: child process started successfully, parent exiting
Oct 28 03:59:12 centos8 systemd[1]: Started MongoDB Database Server.

MongoDB to get to using the command:

mongo

Creating a user administrative MongoDB

we get to MongoDB command :

mongo

Then we move the database named admin

use admin

We issue a command to create user:

db.createUser(
 {
 user: "mongodadmin",
 pwd: "password123",
 roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
 }
 )

password123 we change, of course, to our secret password 😉

We should get the result:

Successfully added user: {
 "user" : "mongodadmin",
 "roles" : [
  {
   "role" : "userAdminAnyDatabase",
   "db" : "admin"
  }
 ]
}

Check your command:

show users

Score:

{
 "_id" : "admin.mongodadmin",
 "userId" : UUID("f6e908db-e393-44a9-8c77-0fdb1c2baa0e"),
 "user" : "mongodadmin",
 "db" : "admin",
 "roles" : [
  {
   "role" : "userAdminAnyDatabase",
   "db" : "admin"
  }
 ],
 "mechanisms" : [
  "SCRAM-SHA-1",
  "SCRAM-SHA-256"
 ]
}

Configure authentication MongoDB

By default MongoDB allows all users access to the MongoDB shell and run arbitrary commands. It is therefore recommended that you configure authentication MongoDB, to prevent other users to run commands without the required permissions.

First you need to enable authentication for MongoDB, by editing the file

nano /lib/systemd/system/mongod.service

And so we set the following line:

Environment="OPTIONS= --auth -f /etc/mongod.conf"

reload services:

systemctl --system daemon-reload
systemctl restart mongod

Now we try to enter without permission:

mongo
use admin
show users

We'll see an error

2019-10-28T04:13:15.346-0400 And QUERY    [js] uncaught exception: Error: command usersInfo requires authentication :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
DB.prototype.getUsers@src/mongo/shell/db.js:1638:15
shellHelper.show@src/mongo/shell/utils.js:883:9
shellHelper@src/mongo/shell/utils.js:790:15
@(shellhelp2):1:1

Now we log on correctly privileges:

db.auth('mongodadmin', 'password123')
show users

You should see the admin user with their roles in the following output:

{
 "_id" : "admin.mongodadmin",
 "userId" : UUID("f6e908db-e393-44a9-8c77-0fdb1c2baa0e"),
 "user" : "mongodadmin",
 "db" : "admin",
 "roles" : [
  {
   "role" : "userAdminAnyDatabase",
   "db" : "admin"
  }
 ],
 "mechanisms" : [
  "SCRAM-SHA-1",
  "SCRAM-SHA-256"
 ]
}