Friday, March 13, 2015

Installation of Postgresql and phpPgAdmin

PostgreSQL is an object-relational database management system and can be downloaded from http://www.postgresql.org or via Linux packagers like Yum or through other 3rd party solutions. PgAdmin3 can be installed to manage the database.

It is available under PostgreSQL License, similar to the MIT license.

Today, a large number of PHP programming framework have support to use PostgreSQL.

PhpPgAdmin is a web based administration tool for PostgreSQL. Source and binary can be downloaded from http://phppgadmin.sourceforge.net

It is available under GNU General Public License.

Steps listed if for installation environment:
Centos 6.3
Selinux in permissive mode
Apache httpd version 2.2.15

Step 1:  Install PostgreSQL

Refer previous posting for the installation. PostgreSQL version 9.4 is available at this point and its safe to say that just replacing 9.3 with 9.4 will work. Here are list of the changes;

Yum repository

  • 32bits: http://yum.postgresql.org/9.4/redhat/rhel-6-i386/pgdg-centos94-9.4-1.noarch.rpm
  • 64bits: http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/pgdg-centos94-9.4-1.noarch.rpm

RPM packages: postgresql94-server postgresql94-contrib

Ensure TCPIP connection is setup, edit /var/lib/pgsql/9.4/data/postgresql.conf
listen_addresses = '*'
port = 5432

Important files:
Configure authentications: /var/lib/pgsql/9.4/data/pg_hba.conf
Configure server to accept TCPIP: /var/lib/pgsql/9.4/data/postgresql.conf


Starting and enabling at Linux bootup.
service postgresql-9.4 start
chkconfig postgresql-9.4 on

Step 2: Configure firewall

Its good to keep local firewall enabled. Edit at end of /etc/sysconfig/iptables

-A INPUT -m state --state NEW -m tcp -p tcp --dport 5432 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT

Restart iptables.

Note: Although the Linux is in permissive, its good to enable web servers to access the database using the command;
setsebool -P httpd_can_network_connect_db 1

Step 3: Install phpPgAdmin

From the command line, type
yum install epel-release
yum install phpPgAdmin

Edit /etc/httpd/conf.d/phpPgAdmin.conf

Alias /phpPgAdmin /usr/share/phpPgAdmin


        # Apache 2.2
        Order deny,allow
        Allow from all


Then restart httpd.

Step 4: Configure phpPgAdmin

Lets use a server administration configuration called "Test Server" that we can practice with. Edit and/or add following server instance to /etc/phpPgAdmin/config.inc.php
Add
        $conf['servers'][1]['desc'] = 'Test Server';
        $conf['servers'][1]['host'] = 'localhost';
        $conf['servers'][1]['port'] = 5432;
        $conf['servers'][1]['sslmode'] = 'allow';
        $conf['servers'][1]['defaultdb'] = 'postgres';
        $conf['servers'][1]['pg_dump_path'] = '/usr/bin/pg_dump';
        $conf['servers'][1]['pg_dumpall_path'] = '/usr/bin/pg_dumpall';

Edit
        $conf['extra_login_security'] = false;
        $conf['owned_only'] = true;

Restart PostgreSQL.

Open a web browser and type in the URL http://localhost/phpPgAdmin



Some important files that might be of use;

  • /usr/share/phpPgAdmin/conf/config.inc.php
  • /etc/httpd/conf.d/phpPgAdmin.conf
  • /etc/phpPgAdmin/config.inc.php



Notes:
  1. phpPgAdmin: If keep getting "Login failed", check the PostgreSQL server for problems. Most likely the pg_hba.conf isnt fully using md5.
  2. References on administration from PostgreSQL Documentation.

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