How to Installation of MongoDB on CentOS 7

Step 1 – Adding the MongoDB Repository
# vi /etc/yum.repos.d/mongodb-org.repo
[mongodb-org-3.4]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.4/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.4.asc

#yum repolist

Step 2 – Installing MongoDB 

[root@dev ~]#yum install mongodb-org

Step 3:Start mongod service
[root@dev ~]# systemctl start mongod

Step 4:Access the database server with the MongoDB Shell
# mongo 

Step 5:- Create New Database

#use DB_NAME

6: Show database list
#db   :- show database
#dbs  :- show database list

Step 7:- create database is not present in list . To display you need insert one document.
#db.movie.insert({"name":"testing db"})
#show dbs

Step 8 : Backup a MongoDB

#mkdir -P  /var/backups/mongobackups
#mongodump  --db DB_NAME --out /var/backups/mongobackups/`date +"%m-%d-%y"` 

Ex :-

[root@dev ~]# mongodump  --db test_DB --out /var/backup/mongo_bk/
2021-02-01T16:07:21.572+0530    writing test_DB.test_DB to
2021-02-01T16:07:21.573+0530    writing test_DB.employeeprofile to
2021-02-01T16:07:21.576+0530    done dumping test_DB.test_DB (1 document)
2021-02-01T16:07:21.576+0530    done dumping test_DB.employeeprofile (1 document)
[root@dev mongo_bk]# ls
test_DB
[root@dev mongo_bk]# cd test_DB/
[root@dev test_DB]# ls
employeeprofile.bson           test_DB.bson
employeeprofile.metadata.json  test_DB.metadata.json

Step 9: Backup will have an output such as:
/var/backup/mongobackups/Current_Date/DB_NAME

Step 10 : If you want to delete new database Database_Name

#use Database_Name
#db.dropDatabase()

Step 11: -Restoring & Migrate a MongoDB

[root@dev test_DB]# mongorestore --db test_DB --drop /var/backup/mongo_bk/test_DB/

2021-02-01T16:09:25.874+0530    restoring test_DB.employeeprofile from /var/backup/mongo_bk/test_DB/employeeprofile.bson
2021-02-01T16:09:25.955+0530    no indexes to restore
2021-02-01T16:09:25.955+0530    finished restoring test_DB.employeeprofile (1 document)
2021-02-01T16:09:25.955+0530    restoring test_DB.test_DB from /var/backup/mongo_bk/test_DB/test_DB.bson
2021-02-01T16:09:25.959+0530    no indexes to restore
2021-02-01T16:09:25.959+0530    finished restoring test_DB.test_DB (1 document)
2021-02-01T16:09:25.959+0530    done
#mongorestore --db newdb --drop /var/backups/mongobackups/01-20-16/newdb/

How to change mongo data path in vim /etc/mongo.conf clike here... 

Step 12: Allow Remote Access to MongoDB  

Open MongoDB configuration file /etc/mongod.conf and change bindIp by adding
We will check mongod is running at port or not 

[root@dev mongo]# ss -plnt
State       Recv-Q Send-Q Local Address:Port               Peer Address:Port              
LISTEN      0      128         *:5432                    *:*                   users:(("postgres",pid=9974,fd=3))
LISTEN      0      100    127.0.0.1:25                      *:*                   users:LISTEN      0      128         *:22                      *:*                   users:(("sshd",pid=1213,fd=3))
(("master",pid=14794,fd=14))
LISTEN      0      128     [::1]:953                  [::]:*                   users:(("named",pid=14669,fd=25))
LISTEN      0      50       [::]:445                  [::]:*                   users:

[root@dev mongo]#vim /etc/mongod.conf
# network interfaces
#net:
  port: 27017

  bindIp: 127.0.0.1,192.168.105.62 # Enter 0.0.0.0,:: to bind to all interfaces
 

 [root@dev ]# firewall-cmd --zone=public --add-port=27017/tcp --permanent
 [root@dev mongo]# firewall-cmd --reload
 success

[root@dev ]# systemctl restart mongod

Step 13: mongod is listening on configured interfaces and show output
# netstat -tnlp
Proto Recv-Q Send-Q Local Address       Foreign Address State  PID/Program name
tcp        0      0 127.0.0.1:27017     0.0.0.0:*       LISTEN 19757/mongod
tcp        0      0 192.168.0.100:27017 0.0.0.0:*       LISTEN 19757/mongod

 

Now create DB:-
#use TEST_DB
#db.createUser({user: "testuser", pwd: "test", roles:[{role: "userAdminAnyDatabase", db: "TEST_DB"}]})
#mongo -u test -p test 192.168.105.118/TEST_DB



Step 14: Connect Remote login

#mongo -u ian -p secretPassword 123.45.67.89/cool_db

 

#Add User for Database

#db.createUser({user: "myuser", pwd: "password", roles:[{role: ["readWrite"], db: "admin"}]})


Step:1- Open the mongo shell:write this  command

#mongo

Step:2-  Create Database Super users
 
#db.createUser({user: "mongo-admin", pwd: "password", roles:[{role: "userAdminAnyDatabase", db: "admin"}]})

Step 3: - Create New user Jack with read-only permission for DB1 and also read & write permission for DB2.

#db.createUser({user: "Jack", pwd: "password", roles:[{role: "read", db: "DB1"}, {role:"readWrite", db: "DB2"}]})

Step 4:- Connect DB
# mongo -u Jack -p --authenticationDatabase DB1

Step 5:

#db.revokeRolesFromUser( "Jack",[ { role: "read", db: "DB2" } )

Step 6 : Drop User
#use DB1

db.dropUser('Jack')


Step 6: Show all databases;
# mongo
# show databases

Step 7: Show all users;
# show users
# show roles
step 8: