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PGA Installation Prerequisites 

1. Requires a Unix or Unix like operating system
2. Requires a web server (e.g apache web server) with PHP 5.4 or higher. Make sure have enabled mod_rewrite module in httpd.conf file and enable PHP SOAP extension
3. Install Composer
4. MYSQL database installation (Required if the user is hosting Airavata on his own. To communicate with SciGaP this step is not relevant)
5. MCrypt PHP extension
6. Enable OpenSSL PHP extension
7. Follow instructions given in links to install the prerequisites based on the OS ;
   1. On Ubunutu: http://www.dev-metal.com/install-laravel-4-ubuntu-12-04-lts/
   2. On Centos: https://www.digitalocean.com/community/tutorials/how-to-install-laravel-4-on-a-centos-6-vps
   3. On MAC OS: http://sangatpedas.com/20140219/installing-laravel-osx-mavericks/
8. Important: Do not need to install Laravel. You can skip the steps given on the links

NOTE: Plese refer documentation in Airavata Documentation: Prerequisites

Installing PGA in Ubuntu OS

Prerequisites

The following guide gives a sample installation starting from a fresh Ubunutu 12.04 installation.

1. Update the ubuntu package manager

   1. sudo apt-get update

   2. sudo apt-get upgrade

      
      

2. Install Apache 

   1. sudo apt-get install apache2

      
      

3. Install PHP 5.4

   1. sudo apt-get install python-software-properties

   2. sudo add-apt-repository ppa:ondrej/php5-oldstable

   3. sudo apt-get update

   4. sudo apt-cache policy php5

   5. sudo apt-get install php5

      
      

4. You can check the installed versions of apache and php using following commands

   1. apache2 -v 

   2. php -v

      
      

5. Install the necessary php extensions

   1. sudo apt-get install unzip

   2. sudo apt-get install curl

   3. sudo apt-get install openssl

   4. sudo apt-get install php5-mcrypt

   5. sudo apt-get install php-soap

      
      

6. Install Composer System Wide

   1. curl -sS https://getcomposer.org/installer | php

   2. sudo mv composer.phar /usr/local/bin/composer

      
      

7. Activate mod_rewrite

   1. sudo a2enmod rewrite

   2. sudo service apache2 restart

      
      

8. Open the default vhost config file:

   1. sudo nano /etc/apache2/sites-available/default

   2. Now search for “AllowOverride None”  corresponding “DocumentRoot /var/www <Directory /var/www>” (which should be there TWO times) and change both to “AllowOverride All“. Search for these two lines.

   3. Exit and save with CTRL+X, Y, ENTER.
      
      

PGA Installation

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1. Download PGA from github to the document root of you web server /var/www. 
2. Use git clone https://github.com/apache/airavata-php-gateway.git  or download the zip from the github web page.
3. Go inside the PGA directory (e.g /var/www/airavata-php-gateway)
4. Make sure the storage folder is writable; sudo chmod -R 777 app/storage
5. Go to [PGA_HOME]/app/config/pga_config.php and change the configuration to match your settings. More instruction on pga_config.php follow step 6 in Airavata Documentation: pga_config.php configurations 
   
6. Now issue composer update command; sudo composer update
7. Restart the web server; sudo service apache2 restart

Installing PGA on

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Cent OS

Please follow documentation in Airavata Documentation: PGA Installation on Cent OS 7

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1. Install the necessary dependencies:

   1. $ sudo pacman -S polkit apache php php-apache php-mcrypt php-composer

2. Enable the appropriate extensions:

   1. $ sudo vim /etc/php/php.ini
Uncomment the following extensions: mcrypt.so, openssl.so, and soap.so

   2. $ sudo vim /etc/httpd/conf/httpd.conf
Uncomment the following extension: rewrite_module modules/mod_rewrite.so
Replace the mpm_event_module modules/mod_mpm_event.so with mpm_prefork_module modules/mod_mpm_prefork.so
Add the following line: LoadModule php5_module modules/libphp5.so
Add the following line: Include conf/extra/php5_module.conf

3. Start and enable the Apache and MySQL daemons:

   1. $ sudo systemctl start polkit
$ sudo systemctl start httpd
$ sudo systemctl enable httpd

   2. Note: you may need to reboot to start polkit

4. Clone the PGA git repository:

   1. $ cd /srv/http
$ sudo git clone https://github.com/apache/airavata-php-gateway.git
$ sudo chown -R $USER airavata-php-gateway

5. Configure the PGA:
   1. $ cd airavata-php-gateway
$ cp app/config/pga_config.php.example app/config/pga_config.php
$ vim app/config/pga_config.php
   2. Note: make sure to make the directory pointed to by 'experiment-data-root' in pga_config.php and chmod 777 it. By default, this is /srv/http/experimentData
6. Configure the PGA storage permissions:

   1. $ chmod -R 777 app/storage 

7. Update using Composer:

   1. $ sudo composer update

Installing PGA in MAC OS

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Prerequisites 

1. To install MCrypt for PHP on MAC please follow the steps in http://coolestguidesontheplanet.com/install-mcrypt-php-mac-osx-10-9-mavericks-development-server/
2. Once above is completed follow the steps given in httpin folowing links;
   1. Configuring Apache: https://
   sangatpedas
   1. coolestguidesontheplanet.com/
   20140219/installing-laravel-osx-mavericks/ for
   1. Configuring Apachehow-to-install-php-mysql-apache-on-os-x-10-6/
   2. Installing Composer: 

Download and Configure PGA

1. 1. https://getcomposer.org/doc/00-intro.md#installation-linux-unix-osx
      
      

PGA Installation

1. Navigate to directory; cd

   cd

   /Library/WebServer/Documents

2. git

   clone https://github.com/apache/airavata-php-gateway.git

3. cd

   After cloning is completed navigate to gateway directory: cd /Library/WebServer/Documents/airavata-php-gateway

4. Make sure the storage folder is writablewritable sudo chmod -R 777 app/storage
5. (optional) Go to [PGA_HOME]/app/config/pga_config.php and change the configuration to match your settings. More instruction on pga_config.php follow step 6 in Airavata Documentation: pga_config.php configurations
   
6. Enable Apache extensions (mod_rewrite module and PHP SOAP extension)

   1.  sudo

      vim

      /etc/apache2/httpd.conf

      1. uncomment

         #LoadModule

         rewrite_module

         libexec/apache2/mod_rewrite.so

      2. uncomment

         #LoadModule

         php5_module

         libexec/apache2/libphp5.so

7. Now issue composer update command; sudo composer update
8. Restart the web serverserver sudo apachectl restart
   

Troubleshooting PGA Installation Issues  

If you are facing issues and not able to open the user interface even after doing the necessary steps, please troubleshot with below steps
below command may not work which is specified in the installation page for the Ubuntu :

• After following the required steps only the home page is working and some images are not shown properly.
  • If you are facing this behavior first check whether you have enabled mod_rewrite module in apache webserver. And also check whether you have set AllowOverride All in the Vhost configuration file in apache web server. (e.g file location is /etc/apache2/sites-available/default and there should be two places where you want to change)

• I get the Error message Permission Denied to app/storage directory
  • Execute the following command and grant all permissions sudo chmod -R 777 app/storage
• When executing sudo composer install it asks for Mcrypt PHP extension required, then install mcrypt by following the below steps

sudo apt-get install php5-mcrypt

use locate mcrypt.so ,to get its locaton

locate mcrypt.ini and open the mcrypt.ini file
sudo pico /etc/php5/mods-available/mcrypt.ini
change the at line a extension=<location of e mcrypt.so file> eg:/usr/lib/php5/20121212/mcrypt.so
save changes.

execute the command:  sudo php5enmod mcrypt

Now restart the apache server again and test PGA web-interface.

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Link the Local PGA with Hosted Airavata

1. Once the PGA is installed you will have to link with hosted Airavata. 
2. Contact Airavat hosting team (probably apache Airavata team) and obtain information required in section 'Airavata Client Configurations' of pga_config.php file in directory [PGA_HOME]/app/config

Troubleshooting PGA Installation Issues  

Having an issue with installation? Maybe someone earlier faced and the answer could be in  FAQs. Please try: Airavata Documentation: FAQ

Comments, clarifications most welcomed. Subscribe and contact us through http://airavata.apache.org/community/mailing-lists.html