Archive for the ‘PosgreSQL’ Category

Install and make Apache + PHP to work with PosgreSQL database server on Debian Linux and set up server Web Posgre interface Pgpadmin howto

Wednesday, June 15th, 2016

make-apache-php-work-with-postgresql-pgsql-and-install-postgresql-db-web-admin-interface

In previous article I've wrote on how to install postgresql on Debian Linux using the deb repository this was necessery to import some PostGres DBs, however this was not enough to run the posgresql php based website aimed as connection from Apache / PHP module to PostGre was failing after a bit of investigation and a check in phpinfo(); I've realized the module PHP module for postgres pgsql.so was missing, here is what I did in order to install it:
 

debian:~# apt-get install php5-pgsql phppgadmin libapache2-mod-auth-pgsql 

PHP sessions enable configuration

As it is common a common problem with PHP applications written to use PostGres is to loose sessions and by default PHP does not have configured sessions.save_path it is a very good practice to directly enable it in /etc/php5/apache2/php.ini open the file in text editor:
 

debian:~# vim /etc/php5/apache2/php.ini


Find the commented directive line:
 

;session.save_path = “/tmp”


and uncomment it, i.e.:
 

session.save_path = “/tmp”


Quit saving vim with the usual :wq!

The 3 modules provides pgsql.so for PHP and mod_auth_pgsql.so for Apache2, the 3rd packae phpgadmin provides a Web administration interface for installed PostgreSQL servers Databases, for those experienced with MySQL Database its the same as PHPMyAdmin.

 

 Here is quick configuration for use of PostgreAdmin interface:

By default PHPPGADMIN installation process configure the Apache2 server' /etc/phppgadmin/apache.conf  to use  /etc/apache2/conf.d/phppgadmin


Here is the default my server package instaleld  file content:

 

Alias /phppgadmin /usr/share/phppgadmin

<Directory /usr/share/phppgadmin>

DirectoryIndex index.php
AllowOverride None

order deny,allow
deny from all
allow from 127.0.0.0/255.0.0.0 ::1/128
# allow from all

<IfModule mod_php5.c>
  php_flag magic_quotes_gpc Off
  php_flag track_vars On
  #php_value include_path .
</IfModule>
<IfModule !mod_php5.c>
  <IfModule mod_actions.c>
    <IfModule mod_cgi.c>
      AddType application/x-httpd-php .php
      Action application/x-httpd-php /cgi-bin/php
    </IfModule>
    <IfModule mod_cgid.c>
      AddType application/x-httpd-php .php
      Action application/x-httpd-php /cgi-bin/php
    </IfModule>
  </IfModule>
</IfModule>

</Directory>

It is generally a good practice to change the default Alias location of phppgadmin, so edit the file and change it to something like:
 

Alias /phppostgresgadmin /usr/share/phppgadmin

 

  • Then phpPgAdmin is available at http://servername.com/phppostgresadmin (only from localhost, however in my case I wanted to be able to access it also from other hosts so allowed PostgresGadmin from every hosts, to do so, I've commented in above config

 

# allow from 127.0.0.0/255.0.0.0 ::1/128

 

and uncommented #allow from all line, e.g.:
 

allow from all


Also another thing here is in your VirtualHost whenever you plan to access the PHPPGADMIN is to include in config ( in my case this is the file /etc/apache2/sites-enabled/000-default before (</VirtualHost> end line) following Alias:
 

Alias /phpposgreadmin /usr/share/phppgadmin


Then to access PostGreSQL PHP Admin interface in Firefox / Chrome open URL:

 

http://your-default-domain.com/phpposgreadmin

phpPgAdmin-postgresql-php-web-interface-debian-linux-screenshot
 

 

Configure access to a remote PostgreSQL Server

With PhpPgAdmin, you can manage many PostgreSQL servers locally (on the localhost) or on remote hosts.

First, you have to make sure that the distant PostgreSQL server can handle your request, that you can connect to it. You can do this by modifying the /etc/postgresql/9.5/main/filepg_hba.conf and adding a line like:

# PhpPgAdmin server access host all db_admin xx.xx.xx.xx 255.255.255.255 md5

Then, you need to add your distant PostgreSQL server into the config file for PhpPgAdmin. This file is  /etc/phppgadmin/config.inc.php the default postgresql port is 5432, however you might have configured it already to use some different port if you're not sure about the port number the postgresql is listening check it out:

 

debian:~# grep -i port /etc/postgresql/*/main/postgresql.conf
etc/postgresql/9.5/main/postgresql.conf:port = 5433                # (change requires restart)
/etc/postgresql/9.5/main/postgresql.conf:                    # supported by the operating system:
/etc/postgresql/9.5/main/postgresql.conf:                    # supported by the operating system:
/etc/postgresql/9.5/main/postgresql.conf:# ERROR REPORTING AND LOGGING


To login to phppgadmin interface there is no root administrator user such as in PHP so you will need to priorly create some user and later use it for connection from Postgres Web interface.

To create from console new user in postgres:
 

debian:~# su – postgres
posgres@debian:~$ psql template1
posgres@debian:~$ psql -d template1 -U postgres

 

Welcome to psql 9.5, the PostgreSQL interactive terminal. Type: \copyright for distribution terms \h for help with SQL commands \? for help on internal slash commands \g or terminate with semicolon to execute query \q to quit template1=#

template1=# CREATE USER MyNewUser WITH PASSWORD 'myPassword';


To add a new database to postgres from shell:

template1=# CREATE DATABASE NewDatabase;
 

template1=# GRANT ALL PRIVILEGES ON DATABASE NewDatabase to MyNewUser;

 

template1=# q

Last command instructs it to quit if you want to get more info about possible commands do type instead of q ? for general help or for database / table commands only h
If you need to connect to NewDatabase just to test first it works in console before trying it from postgrepgadmin

 

 

 

 

 

posgres@debian:~$ psql -d NewDatabase -U MyNewUser

 

 

 

 

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Install postgresql on Debian Squeeze / How to install PostGreSQL on Obsolete Debian installation

Friday, June 10th, 2016

how-to-install-postgresql-on-obsolete-old-debian-squeeze-tutorial

If you're in position like me to be running an old version of Debian (Squeeze) and you need to install PostgreSQL you will notice that the Debian 6.0 standard repositories are no longer active and apt-get update && apt-get upgrade are returning errors, thus because this Debian release is already too old and even the LTS repositories are inactive it is impossible to install postgresql with the usual.

To get around the situation first thing I did was to try to add followin Debian  repositories. to /etc/apt/sources.list
 

deb http://ftp.debian.net/debian-backports squeeze-backports-sloppy main
deb http://archive.debian.org/debian-archive/debian/ squeeze main contrib non-free
deb http://archive.debian.org/debian-archive/debian/ squeeze-lts main contrib non-free

After adding it I continued getting missing package errors while trying:
 

# apt-get update && apt-get install postgresql postgresql-client
….
…..

 

E: Some index files failed to download. They have been ignored, or old ones used instead.


Thus I googled a bit and I found the following PostgreSQL instructions working Debian 7.0 Wheeze and decided to try it 1 in 1 just changing the repository package wheezy word with squeeze
in original tutorial postgre's deb repositories are:

 

deb http://apt.postgresql.org/pub/repos/apt/ wheezy-pgdg main


I've only changed that one with:

 

deb http://apt.postgresql.org/pub/repos/apt/ squeeze-pgdg main

 

I guess though this worked for Debian Squeeze installing current versions such as Debian 8.0 Jessis and newer wouldn't be a prolem if you just change the debian version keyword witht he distribution for which you need the postgresql package


Here is all the consequential steps I took to make the PostgreSQL 9.5 running on my old and unsupported Debian 6.0 Squeeze

Create /etc/apt/sources.list.d/pgdg.list. The distributions are called codename-pgdg. In the example, replace wheezy with the actual distribution you are using:

# vim /etc/apt/sources.list.d/pgdg.list

 

deb http://apt.postgresql.org/pub/repos/apt/ squeeze-pgdg main

debian:~# apt-get –yes install wget ca-certificates debian:~# wget –quiet -O – https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add – debian:~# apt-get update debian:~# apt-get upgrade debian:~# apt-get –yes install postgresql-9.5 pgadmin3

Next step is to connect to PostGreSQL and create database user and a database # su – postgres $ psql

Create a new database user and a database:

postgres=# CREATE USER mypguser WITH PASSWORD 'mypguserpass'; postgres=# CREATE DATABASE mypgdatabase OWNER mypguser;

 

or

# createuser mypguser #from regular shell # createdb -O mypguser mypgdatabase

Quit from the database

postgres=# q

Connect as user mypguser to new database

# su – mypguser $ psql mypgdatabase

or

# psql -d mypgdatabase -U mypguser

If you get errors like:

psql: FATAL: Ident authentication failed for user "mypguser"

edit pg_hba.conf in /etc/postgresql/9.5.Y/main/pg_hba.conf

 

local all all trust # replace ident or peer with trust

reload postgresql

/etc/init.d/postgresql reload …

 


To make sure that PostGreSQL is running on the system check the following processes are present on the server:

 

 

 

root@pcfreak:/var/www/images# ps axu|grep -i post postgres 9893 0.0 0.0 318696 16172 ? S 15:20 0:00 /usr/lib/postgresql/9.5/bin/postgres -D /var/lib/postgresql/9.5/main -c config_file=/etc/postgresql/9.5/main/postgresql.conf postgres 9895 0.0 0.0 318696 1768 ? Ss 15:20 0:00 postgres: checkpointer process postgres 9896 0.0 0.0 318696 2700 ? Ss 15:20 0:00 postgres: writer process postgres 9897 0.0 0.0 318696 1708 ? Ss 15:20 0:00 postgres: wal writer process postgres 9898 0.0 0.0 319132 2564 ? Ss 15:20 0:00 postgres: autovacuum launcher process postgres 9899 0.0 0.0 173680 1652 ? Ss 15:20 0:00 postgres: stats collector process root 14117 0.0 0.0 112404 924 pts/1 S+ 16:09 0:00 grep -i post

 

 


Well that's all folks now you will have the postgresql running on its default port 5433:

 

debian:/etc/postgresql/9.5/main# grep -i port postgresql.conf
port = 5433 # (change requires restart)
# supported by the operating system:
# supported by the operating system:
# ERROR REPORTING AND LOGGING # %r = remote host and port

 

 


Well that's it folks thanks The Lord Jesus Christ grace by the prayers of John The Baptist and Saint Sergij Radonezhki it works 🙂

 

 

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