Difference between revisions of "Linux (Ubuntu) Installation - Supporting Software - 16.04"
From IHRIS Wiki
|Line 48:||Line 48:|
sql-mode = "ONLY_FULL_GROUP_BY
sql-mode = "ONLY_FULL_GROUP_BY,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
Revision as of 12:39, 5 March 2018
This document describes the needed installation and configuration of supporting software for iHRIS on Ubuntu 16.04 LTS, Xenial Xerus. This will only work with iHRIS 4.3 or greater (or additional local changes). iHRIS 4.3 is currently available for testing and should not be used in production yet.
Here are instructions for installing the supporting software for iHRIS on a Linux (Ubuntu) system. If you need help installing Ubuntu you may want to take a look at these directions for installing a Server or a Desktop system. For a server setup, we recommend using a LTS (long term support) version of Ubuntu.
Note: Unless specifically mentioned, all the commands below are run using a terminal. You can start this in Ubuntu by going to Applications -> Accessories -> Terminal. Any time a command begins with sudo it will prompt for your password because this will be run with administrative privileges. When you run sudo multiple times, only the first time will ask for your password.
Note: Some installation commands will prompt for inputs in the terminal window, usually with a blue background. The mouse doesn't work to click on options here. You can use Tab to move between options and the space bar to check or uncheck selections.
Note: Some commands will launch the gedit file editor. Look at the documentation if you need additional help.
sudo tasksel install lamp-server
If you have never used mysql on your system, you will be asked to set the 'root' password for mysql. We will refer to this password as XXXXX below.
Important: Make sure your email system is correctly configured. Under a default Ubuntu installation, you can do this with one of two commands:
sudo apt install postfix sudo dpkg-reconfigure postfix
Follow the on-screen instructions to set up email on your system. For additional help with installing Postfix, look at these instructions. On Debian systems, the same commands can be used, but exim4 is the default MTA instead of postfix
If you are using another Linux distribution, make sure your system can send email properly before continuing.
Make sure you have in /etc/mysql/mysql.conf.d/mysqld.cnf the following values set:
sudo gedit /etc/mysql/mysql.conf.d/mysqld.cnf
query_cache_limit = 4M query_cache_size = 64M
Create /etc/mysql/mysql.conf.d/sql-mode.cnf and set the sql-mode variable.
sudo gedit /etc/mysql/mysql.conf.d/sql-mode.cnf
[mysqld] sql-mode = "ONLY_FULL_GROUP_BY,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
To configure MySQL so iHRIS can create needed functions:
mysql -u root -p
Enter the password you set above (XXXXX) for MySQL. You will now be able to send commands to MySQL and the prompt should always begin with 'mysql> '. Type these commands:
SET GLOBAL log_bin_trust_function_creators = 1; exit
Now restart mysql so these changes take affect.
sudo service mysql restart
Installing PHP Packages
We need to install a few Pear and PECL packages for PHP. For the Pear packages you can do:
sudo apt install php-pear php-gd php-tidy php-intl php-bcmath php-text-password php-mbstring
We need to install the UUID module for PHP. We need to install from PECL. This can be done by first installing the php5-dev package and the uuid packages.
sudo apt install php-uuid
We'll also need to create the ini file to load UUID into PHP.
It should look like this:
We'll also need to enable this for Apache and CLI by creating 2 symlinks for the uuid file:
sudo ln -s /etc/php/7.0/mods-available/uuid.ini /etc/php/7.0/apache2/conf.d/20-uuid.ini sudo ln -s /etc/php/7.0/mods-available/uuid.ini /etc/php/7.0/cli/conf.d/20-uuid.ini
To install APCu you need to run this command:
sudo apt install php-apcu
During certain activities like installation and upgrades you may need more memory than APC uses by default. We also want to turn off the slam defense. We need to edit the configuration file file for apcu:
sudo gedit /etc/php/7.0/mods-available/apcu.ini
It should look like this:
extension=apcu.so apc.enabled=1 apc.write_lock=1 apc.shm_size=100M apc.slam_defense=0 apc.enable_cli=1
If you are using Debian Squeeze, then the value of apc.shm_size should be:
With version 4.0.4 and greater of iHRIS you can use memcached to improve performance
Note: Memcached is used to cache data from the database. Thus if you are an a sitaution where you would need to restart the webserver by
sudo service apache2 restart
you should now do
sudo service apache2 restart && sudo service memcached restart
To install, simply do
sudo apt install php-memcached memcached
Set ZendOpcache options
Edit the opcache config file with this command:
sudo gedit /etc/php/7.0/mods-available/opcache.ini
It should look like this for a production system:
; configuration for php ZendOpcache module ; priority=05 zend_extension=opcache.so opcache.memory_consumption=128M opcache.interned_strings_buffer=8 opcache.max_accelerated_files=4000 opcache.revalidate_freq=60 opcache.fast_shutdown=1 opcache.enable_cli=1
For a development system you should modify revalidate_freq from 60 to 2:
Configuring Apache Web Server
In Ubuntu 16.04, the default document root is /var/www/html so when installing any iHRIS applications you will need to use the new directory to place the symlinks. If you are upgrading you may or may not need to update these depending on if you replaced the Apache configuration files during the previous upgrade.
Enable Rewrite Module
You will see later we are using the apache rewrite module. To enable the module:
sudo a2enmod rewrite
Enable .htaccess Configuration
Now we need to make sure we can use the .htaccess file.
sudo gedit /etc/apache2/apache2.conf
<Directory /var/www/> Options Indexes FollowSymLinks AllowOverride None Require all granted </Directory>
<Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride All Require all granted </Directory>
Save and quit.
You'll need to restart Apache after making these changes.
sudo service apache2 restart