How to install MongoDB in CentOS
To install MongoDB in CentOS
MongoDB is an open-source, cross-platform, document-oriented database which stores data in JSON-like documents. The main features of MongoDB are Ahoc queries, indexing, load balancing and file storage. It is the fourth popular database system. Installation of MongoDb in CentOS is explained in this article.
To install MongoDB
Create a repository for the MongoDB
[root@linuxhelp1 ~]# cd /etc/yum.repos.d/
[root@linuxhelp1 yum.repos.d]# vi mongodb.repo
[mongodb]
name=MongoDB 3.2 Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/3.2/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-3.2.asc
Run the following command to install the MongoDB.
[root@linuxhelp1 ~]# yum install mongodb-org -y
Loaded plugins: fastestmirror, langpacks
Determining fastest mirrors
* base: centos.excellmedia.net
* extras: centos.excellmedia.net
* updates: centos.excellmedia.net
Resolving Dependencies
--> Running transaction check
---> Package mongodb-org.x86_64 0:3.2.9-1.el7 will be installed
--> Processing Dependency: mongodb-org-tools = 3.2.9 for package: mongodb-org-3.2.9-1.el7.x86_64
--> Processing Dependency: mongodb-org-shell = 3.2.9 for package: mongodb-org-3.2.9-1.el7.x86_64
--> Processing Dependency: mongodb-org-server = 3.2.9 for package: mongodb-org-3.2.9-1.el7.x86_64
--> Processing Dependency: mongodb-org-mongos = 3.2.9 for package: mongodb-org-3.2.9-1.el7.x86_64
.
.
.
Installed:
mongodb-org.x86_64 0:3.2.9-1.el7
Dependency Installed:
mongodb-org-mongos.x86_64 0:3.2.9-1.el7 mongodb-org-server.x86_64 0:3.2.9-1.el7 mongodb-org-shell.x86_64 0:3.2.9-1.el7
mongodb-org-tools.x86_64 0:3.2.9-1.el7
Complete!
Start and enable the MongoDB service by running the following command.
[root@linuxhelp1 ~]# systemctl start mongod.service
[root@linuxhelp1 ~]# systemctl enable mongod.service
mongod.service is not a native service, redirecting to /sbin/chkconfig.
Executing /sbin/chkconfig mongod on
Now add the MongoDB port number to the firewall as shown below.
[root@linuxhelp1 ~]# firewall-cmd --zone=public --add-port=27017/tcp --permanent success [root@linuxhelp1 ~]# firewall-cmd --reload Success
To launch MongoDB
Connect to the MongoDB from terminal by running the following command.
[root@linuxhelp1 ~]# mongo
While connecting to MongoDB we may get below warning message
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:
2016-09-16T04:04:23.640+0530 I CONTROL [initandlisten]
2016-09-16T04:04:23.641+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is ' always' .
2016-09-16T04:04:23.641+0530 I CONTROL [initandlisten] ** We suggest setting it to ' never'
2016-09-16T04:04:23.641+0530 I CONTROL [initandlisten]
2016-09-16T04:04:23.641+0530 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is ' always' .
2016-09-16T04:04:23.641+0530 I CONTROL [initandlisten] ** We suggest setting it to ' never'
2016-09-16T04:04:23.641+0530 I CONTROL [initandlisten]
2016-09-16T04:04:23.641+0530 I CONTROL [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 4096 processes, 64000 files. Number of processes should be at least 32000 : 0.5 times number of files.
2016-09-16T04:04:23.641+0530 I CONTROL [initandlisten]
>
Run the following command to resolve " transparent huge page error"
[root@linuxhelp1 ~]# echo never > /sys/kernel/mm/transparent_hugepage/enabled
[root@linuxhelp1 ~]# echo never > /sys/kernel//mm/transparent_hugepage/defrag
To overcome the warning error, open the configuration file and add the following entry into it.
[root@linuxhelp1 ~]# vi /etc/security/limits.d/20-nproc.conf
mongodsoft nproc 64000
Now restart the mongodb service by running the following command.
[root@linuxhelp1 ~]# systemctl restart mongod try to connect MongoDB using mongo command: [root@linuxhelp1 ~]# mongo MongoDB shell version: 3.2.9 connecting to: test >
Comments ( 0 )
No comments available