Install MongoDB on CentOS

mongodb centos

MongoDB provides four 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, mongooplog, mongoperf, mongorestore, mongostat, and mongotop.

• Configure the package management system (yum)
  Create a /etc/yum.repos.d/mongodb-org-3.4.repo file so that you can install MongoDB directly, using yum. Use the following repository file:

  [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
  

• Install the MongoDB packages and associated tools

  sudo yum install -y mongodb-org
  

• install package policycoreutils-python

  sudo yum install policycoreutils-python
  

• Configure SELinux
  Method 1.

  sudo semanage port -a -t mongod_port_t -p tcp 27017
  

  method 2. 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.
  method 3. 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.

• Move data storage to ZFS (optional)

  sudo zfs create -o mountpoint=/var/lib/mongo/ <zpool name>/mongo
  sudo chown -R mongod:mongod /var/lib/mongo
  

• Using another dictionary for database (ex. /home/mongo)

  sudo mkdir -p /home/mongo
  sudo chown mongod:mongod /home/mongo
  sudo chcon system_u:object_r:mongod_var_lib_t:s0 /home/mongo
  

• run semange fcontext and restorecon

  # sudo semanage fcontext -a -t mongod_db_t "/mongo(/.*)?" # mongod_db_t is not validate. why?
  sudo semanage fcontext -a -t mongod_var_lib_t "/mongo(/.*)?"
  sudo grep -i mongod /etc/selinux/targeted/contexts/files/file_contexts.local
  

• Start MongoDB

  sudo systemctl start mongod
  

  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>
  

• Enable MongoDB start following a system reboot

  sudo chkconfig mongod on
  

• Enable authorization and listen on all IPs
  You need create user first before you enable authorization. see: mongodb cheetsheet
  Update the /etc/mongod.conf

# network interfaces
net:
  port: 27017
#  bindIp: 127.0.0.1  # Listen to local interface only, comment to listen on all interfaces.


security:
  authorization: enabled

Uninstall MongoDB

sudo systemctl stop mongod
sudo yum erase $(rpm -qa | grep mongodb-org)
sudo rm -r /var/log/mongodb /var/lib/mongo

Written on October 19, 2017