Install MySQL, MongoDB, and CouchDB on CentOS 6

Installation instructions for MySQL, MongoDB, and CouchDB on RHEL/CentOS 6.3, covering both SQL and NoSQL database options.

Install MySQL

The world’s most popular open source database

yum install mysql mysql-server chkconfig --levels 235 mysqld on /etc/init.d/mysqld start mysql\_secure\_installation

Install MongoDB

scalable, high-performance NoSQL database with Document-oriented storage (JSON-style documents)

echo \[10gen\] > /etc/yum.repos.d/10gen.repo echo name=10gen Repository >> /etc/yum.repos.d/10gen.repo echo baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86\_64 >> /etc/yum.repos.d/10gen.repo echo gpgcheck=0 >> /etc/yum.repos.d/10gen.repo echo enabled=1 >> /etc/yum.repos.d/10gen.repo yum update -y yum install -y mongo-10gen mongo-10gen-server service mongod start

This MongoDB instance will store its data files in the /var/lib/mongo and its log files in /var/log/mongo, and run using the mongod user account.

Replace ‘x86_64’ with ‘i686’ for 32bit version (not recommended for production by 10gen)

Install CouchDB

Apache CouchDB™ is a database that uses JSON for documents, JavaScript for MapReduce queries, and regular HTTP for an API

to install CouchDB you need to have EPEL repo installed:

cd /opt/ wget http://mirrors.nl.eu.kernel.org/fedora-epel/6/i386/epel-release-6-7.noarch.rpm rpm -Uvh epel-release-6-7.noarch.rpm rm epel-release-6-7.noarch.rpm -f

Install the couchdb package from EPEL:
```
yum install couchdb
```
Edit config file to suit:
```
vi /etc/couchdb/local.ini
```
Start CouchDB:
```
service couchdb start
```
Set it to start automatically on reboots:
```
chkconfig --level 345 couchdb on
```

more information: http://wiki.apache.org/couchdb/Installing_on_RHEL5