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Install MongoDB Community Edition on Red Hat Enterprise or CentOS Linux

Overview

Use this tutorial to install MongoDB Community Edition on Red Hat Enterprise Linux or CentOS Linux versions 6 and 7 using .rpm packages.

Platform Support

This installation guide only supports 64-bit systems. See Platform Support for details.

MongoDB 3.4 removes support for Red Hat Enterprise Linux 5.

Packages

MongoDB provides officially supported packages in their own repository. This repository contains the following packages:

Package Name Description
mongodb-org A metapackage that will automatically install the four component packages listed below.
mongodb-org-server Contains the mongod daemon and associated configuration and init scripts.
mongodb-org-mongos Contains the mongos daemon.
mongodb-org-shell Contains the mongo shell.
mongodb-org-tools Contains the following MongoDB tools: mongoimport bsondump, mongodump, mongoexport, mongofiles, mongorestore, mongostat, and mongotop.

The mongodb-org-server package provides an initialization script that starts mongod with the /etc/mongod.conf configuration file.

See Run MongoDB Community Edition for details on using this initialization script.

The default /etc/mongod.conf configuration file supplied by the packages have bind_ip set to 127.0.0.1 by default. Modify this setting as needed for your environment before initializing a replica set.

Install MongoDB Community Edition

Note

To install a different version of MongoDB, please refer to that version’s documentation. To install the previous version, see the tutorial for version 3.4.

This installation guide only supports 64-bit systems. See Platform Support for details.

Using Tarballs

1

Download the MongoDB .tar.gz tarball.

Download the tarball for your system from the MongoDB Download Center.

2

Extract the files from the downloaded archive.

For example, from a system shell, you can extract using the tar command:

tar -zxvf mongodb-linux-*-4.0.0-rc7.tgz
3

Ensure the binaries are in a directory listed in your PATH environment variable.

The MongoDB binaries are in the bin/ directory of the tarball. You must either:

  • Copy these binaries into a directory listed in your PATH variable such as /usr/local/bin,
  • Create symbolic links to each of these binaries from a directory listed in your PATH variable, or
  • Modify your user’s PATH environment variable to include this directory.

For example, you can add the following line to your shell’s initialization script (e.g. ~/.bashrc):

export PATH=<mongodb-install-directory>/bin:$PATH

Replace <mongodb-install-directory> with the path to the extracted MongoDB archive.

Run MongoDB Community Edition

Prerequisites

Configure SELinux

Important

If you are using SELinux, you must configure SELinux to allow MongoDB to start on Red Hat Linux-based systems (Red Hat Enterprise Linux or CentOS Linux).

To configure SELinux, administrators have three options:

  • If SELinux is in enforcing mode, enable access to the relevant ports that the MongoDB deployment will use (e.g. 27017). See Default MongoDB Port for more information on MongoDB’s default ports. For default settings, this can be accomplished by running

    semanage port -a -t mongod_port_t -p tcp 27017
    
  • Disable SELinux by setting the SELINUX setting to disabled in /etc/selinux/config.

    SELINUX=disabled
    

    You must reboot the system for the changes to take effect.

  • Set SELinux to permissive mode in /etc/selinux/config by setting the SELINUX setting to permissive.

    SELINUX=permissive
    

    You must reboot the system for the changes to take effect.

    You can instead use setenforce to change to permissive mode. setenforce does not require a reboot but is not persistent.

Alternatively, you can choose not to install the SELinux packages when you are installing your Linux operating system, or choose to remove the relevant packages. This option is the most invasive and is not recommended.

Data Directories and Permissions

Warning

On RHEL 7.0, if you change the data path, the default SELinux policies will prevent mongod from having write access on the new data path if you do not change the security context.

The MongoDB instance stores its data files in /var/lib/mongo and its log files in /var/log/mongodb by default, and runs using the mongod user account. You can specify alternate log and data file directories in /etc/mongod.conf. See systemLog.path and storage.dbPath for additional information.

If you change the user that runs the MongoDB process, you must modify the access control rights to the /var/lib/mongo and /var/log/mongodb directories to give this user access to these directories.

ulimit

Most Unix-like operating systems limit the system resources that a session may use. These limits may negatively impact MongoDB operation. See UNIX ulimit Settings for more information.

Procedure

1

Start MongoDB.

You can start the mongod process by issuing the following command:

sudo service mongod start
2

Verify that MongoDB has started successfully

You can verify that the mongod process has started successfully by checking the contents of the log file at /var/log/mongodb/mongod.log for a line reading

[initandlisten] waiting for connections on port <port>

where <port> is the port configured in /etc/mongod.conf, 27017 by default.

You can optionally ensure that MongoDB will start following a system reboot by issuing the following command:

sudo chkconfig mongod on
3

Stop MongoDB.

As needed, you can stop the mongod process by issuing the following command:

sudo service mongod stop
4

Restart MongoDB.

You can restart the mongod process by issuing the following command:

sudo service mongod restart

You can follow the state of the process for errors or important messages by watching the output in the /var/log/mongodb/mongod.log file.

5

Begin using MongoDB.

Start a mongo shell on the same host machine as the mongod. Use the --host command line option to specify the localhost address and port that the mongod listens on:

mongo --host 127.0.0.1:27017

Later, to stop MongoDB, press Control+C in the terminal where the mongod instance is running.

Uninstall MongoDB Community Edition

To completely remove MongoDB from a system, you must remove the MongoDB applications themselves, the configuration files, and any directories containing data and logs. The following section guides you through the necessary steps.

Warning

This process will completely remove MongoDB, its configuration, and all databases. This process is not reversible, so ensure that all of your configuration and data is backed up before proceeding.

1

Stop MongoDB.

Stop the mongod process by issuing the following command:

sudo service mongod stop
2

Remove Packages.

Remove any MongoDB packages that you had previously installed.

sudo yum erase $(rpm -qa | grep mongodb-org)
3

Remove Data Directories.

Remove MongoDB databases and log files.

sudo rm -r /var/log/mongodb
sudo rm -r /var/lib/mongo