Centos - POstgresql 9.2

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How to Install PostgreSQL 9.2 on CentOS6.3/RedHat EL6/Fedora

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As a good measure install all updates to this CentOS 6 server. Before you continue further. This step is op-

tional.

to Install PostgreSQL 9.2 on CentOS 6.3 / RedHat EL6/Fedora http://opensourcedbms.com/dbms/installing-postgresql-9-2-on-ce

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Postgres Repo:

pgdg is the repo that postgresql can be downloaded and installed from. Here is where you download it from.

Identify which version of rpm you want to download for installing PostgreSQL database server. Right now I

am picking PostgreSQL 9.2 for CentOS [CentOS 6 - x86_64] as this is the latest version at this time. Now that

we have identified which version we want to download, right click on that hyperlink and click "copy link ad-

dress".


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Login into your CentOS Server by SSH and run the following command to download it into your CentOS 6

Server.

wget http://yum.pgrpms.org/9.2/redhat/rhel-6-x86_64/pgdg-centos92-9.2-6.noarch.rpm


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If It fails and complains that you dont have wget utility installed on your machine, Install wget utility by run-

ning command

yum install wget


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Now that wget utility is installed, download the rpm from PostgreSQL rpm repository


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Now install this rpm with this command.

rpm -ivh pgdg-centos92-9.2-6.noarch.rpm

Now that we have installed the pgdg central PostgreSQL repo, we should have postgresql rpms show up in

yum package manager search. Run the following command on command line to search for all postgres re-

lated available rpms.

yum search postgres


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The following list should be generated from the search. Now install PostgreSQL client / Server programs.

Run the following commands to install PostgreSQL server/client

yum install postgresql92 postgresql92-server


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You now have successfully installed PostgreSQL database server / client on this CentOS Server.

Now create default data/tables into this newly build database server by running command:

service postgresql-9.2 initdb

[Service name is postgresql-9.2 or corresponding PostgreSQL generated init file under /etc/init.d/ directory]


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Start the PostgreSQL database server now.

service postgresql-9.2 start

Make your database server auto starts when this CentOS server starts/restarts.

chkconfig postgresql-9.2 on


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Create an user other than default user for granting access to the database from outside world into this data-

base server.

Login into database as postgres user, to do that run the following commands:

su postgres

psql -dpostgres

Above command some times lead to a PostgreSQL shared library issue. On some systems that have shared

libraries (which most systems do) you need to tell your system how to find the newly installed shared li-

braries. If you did not encounter this error, please skip this step of adding path to /etc/profile file and move

on to creating user.

psql: error while loading shared libraries: libpq.so.5: cannot open shared object file: No such file or direc-

tory


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To fix this issue we need to add the following lines in your /etc/profile file all the way at the bottom of thefile. First exit out as postgres user by typing exit on command line and add the following lines at the bottom

on /etc/profile file as root user. Save and quit from here after adding those lines mentioned below.

LD_LIBRARY_PATH=/usr/pgsql-9.2/lib [Which ever path is relevant to your installation]

export LD_LIBRARY_PATH

Restart your CentOS Server to get the new LD_LIBRARY_PATH variable set properly.

shutdown -r now

After the server is up and running, SSH in and run the following commands to create an user.

su – postgres

psql -dpostgres


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Now you are inside PostgreSQL database server, so create a super user for accessing database server from

outside world and exit out of there.

CREATE role opensourcedbms LOGIN PASSWORD 'opensourcedbms' SUPERUSER;

\q


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Now we have created a super user for managing the database. We are almost done. To grant outside world

access we need to make modifications to the database server configuration files and CentOS Server firewall

rules [iptables]. First exit out as postgres user on your server and log back in as root user.

Make the changes in your database configuration file :

vi /var/lib/pgsql/9.2/data/postgresql.conf

Uncomment the line #listen_addresses = ‘localhost’ and change it to listen_addresses = ‘*’

The second configuration file that you need to edit in order to grant access to outside world is below [Host


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based authentication file]:

vi /var/lib/pgsql/9.2/data/pg_hba.conf

Add a new line under IPv4 local connections all the way to the near bottom of the file. Make appropriatechanges to network you want this new user to login from. If your subnet is 192.168.1.1/24 or 192.168.1.1/32,

please use that or what ever is relevant in you case. This rule I added indicates the database server to accept

connections for this user originating with in 192.168.1.1/24 sub-net network.

host all opensourcedbms 192.168.1.1/24 md5

Now restart postgres server to get these changes in effect

service postgresql-9.2 restart


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Finally open the default PostgreSQL database port in server firewall to connecting from outside world.

vi /etc/sysconfig/iptables

Add line:

-A INPUT -m state --state NEW -m tcp -p tcp --dport 5432 -j ACCEPT

and now restart iptables

service iptables restart


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At this point you should be able to connect to this database server from clients outside this server like pgAd-

min III [Download pgAdmin III and install on a host that you want to access this database from] as shown be-

low:


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If you have installed this in a virtual machine, make sure that you port forward (NAT Only) 5432 under your

VM Settings > Network Settings > Advanced > Port forwarding to pass through this 5432 from main host to

your VM to connect from outside VM.

Written by: Prashanth Goriparthi on February 2, 2013.

This entry was posted in PostgreSQL on February 2, 2013 [http://opensourcedbms.com/dbms/installing-post-

gresql-9-2-on-cent-os-6-3-redhat-el6-fedora/] .

10 thoughts on “How to Install PostgreSQL 9.2 on CentOS 6.3/RedHat EL6/Fedora”

Pingback: How to do point in time recovery with PostgreSQL 9.2 : PITR in CentOS 6/Redhat EL6


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database management systems - PostgreSQL & MySQL

This is one of the best! Thanks for sharing in one place. Great work

BVSat

February 25, 2013 at 2:14 am

Hi, Thanks for tutorial install postgre on Centos 5.9 x64 from installing to initdb but when i started the service

[FAILED] do you have solution for this one? Thanks.

what does pg startup log say ?

Alexander Murad

April 18, 2013 at 8:30 am

Prashanth Goriparthi

April 18, 2013 at 4:27 pm

Post author

Thx, I was new to cent os

Tobi

April 25, 2013 at 12:35 pm

anonymous

April 25, 2013 at 1:05 pm


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Pingback: Running multiple PostgreSQL 9.2 Instances on one server in CentOS 6/RHEL 6/Fedora | Open

source database management systems - PostgreSQL & MySQL

Good one, thanks it solved our problems. Keep writing.

Thanks a ton !!!!!!!!!! Great Tutorial…..

Feby

June 14, 2013 at 5:40 am


Centos - POstgresql 9.2

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