# Installation
The preferred way of installing Icinga Web 2 is to use the official package repositories depending on which operating
system and distribution you are running. But it is also possible to install Icinga Web 2 directly from source.
## Installing Requirements
* A web server, e.g. Apache or nginx
* PHP >= 5.3.0 w/ gettext, intl and OpenSSL support
* MySQL or PostgreSQL PHP libraries when using a database for authentication or for storing preferences into a database
* LDAP PHP library when using Active Directory or LDAP for authentication
* Icinga 1.x w/ Livestatus or IDO; Icinga 2.x w/ Livestatus or IDO feature enabled
* MySQL or PostgreSQL PHP libraries when using IDO
## Installing Icinga Web 2 from Package
Below is a list of official package repositories for installing Icinga Web 2 for various operating systems.
Distribution | Repository
------------------------|---------------------------
Debian | [debmon](http://debmon.org/packages/debmon-wheezy/icingaweb2), [Icinga Repository](http://packages.icinga.org/debian/)
Ubuntu | [Icinga Repository](http://packages.icinga.org/ubuntu/)
RHEL/CentOS | [Icinga Repository](http://packages.icinga.org/epel/)
openSUSE | [Icinga Repository](http://packages.icinga.org/openSUSE/)
SLES | [Icinga Repository](http://packages.icinga.org/SUSE/)
Gentoo | -
FreeBSD | -
ArchLinux | [Upstream](https://aur.archlinux.org/packages/icingaweb2)
Packages for distributions other than the ones listed above may also be available.
Please contact your distribution packagers.
### Setting up Package Repositories
You need to add the Icinga repository to your package management configuration for installing Icinga Web 2.
Below is a list with examples for various distributions.
Debian (debmon):
````
wget -O - http://debmon.org/debmon/repo.key 2>/dev/null | apt-key add -
echo 'deb http://debmon.org/debmon debmon-wheezy main' >/etc/apt/sources.list.d/debmon.list
apt-get update
````
Ubuntu Trusty:
````
wget -O - http://packages.icinga.org/icinga.key | apt-key add -
add-apt-repository 'deb http://packages.icinga.org/ubuntu icinga-trusty main'
apt-get update
````
For other Ubuntu versions just replace trusty with your distribution's code name.
RHEL and CentOS:
````
rpm --import http://packages.icinga.org/icinga.key
curl -o /etc/yum.repos.d/ICINGA-release.repo http://packages.icinga.org/epel/ICINGA-release.repo
yum makecache
````
Fedora:
````
rpm --import http://packages.icinga.org/icinga.key
curl -o /etc/yum.repos.d/ICINGA-release.repo http://packages.icinga.org/fedora/ICINGA-release.repo
yum makecache
````
SLES 11:
````
zypper ar http://packages.icinga.org/SUSE/ICINGA-release-11.repo
zypper ref
````
SLES 12:
````
zypper ar http://packages.icinga.org/SUSE/ICINGA-release.repo
zypper ref
````
openSUSE:
````
zypper ar http://packages.icinga.org/openSUSE/ICINGA-release.repo
zypper ref
````
The packages for RHEL/CentOS depend on other packages which are distributed as part of the
[EPEL repository](http://fedoraproject.org/wiki/EPEL). Please make sure to enable this repository by following
[these instructions](http://fedoraproject.org/wiki/EPEL#How_can_I_use_these_extra_packages.3F).
### Installing Icinga Web 2
You can install Icinga Web 2 by using your distribution's package manager to install the `icingaweb2` package.
Below is a list with examples for various distributions.
Debian and Ubuntu:
````
apt-get install icingaweb2
````
RHEL, CentOS and Fedora:
````
yum install icingaweb2
````
SLES and openSUSE:
````
zypper install icingaweb2
````
### Preparing Web Setup
You can set up Icinga Web 2 quickly and easily with the Icinga Web 2 setup wizard which is available the first time
you visit Icinga Web 2 in your browser. When using the web setup you are required to authenticate using a token.
In order to generate a token use the `icingacli`:
````
icingacli setup token create
````
In case you do not remember the token you can show it using the `icingacli`:
````
icingacli setup token show
````
Finally visit Icinga Web 2 in your browser to access the setup wizard and complete the installation:
`/icingaweb2/setup`.
## Installing Icinga Web 2 from Source
Although the preferred way of installing Icinga Web 2 is to use packages, it is also possible to install Icinga Web 2
directly from source.
### Getting the Source
First of all, you need to download the sources. Icinga Web 2 is available through a Git repository. You can clone this
repository either via git or http protocol using the following URLs:
* git://git.icinga.org/icingaweb2.git
* http://git.icinga.org/icingaweb2.git
There is also a browsable version available at
[git.icinga.org](https://git.icinga.org/?p=icingaweb2.git;a=summary "Icinga Web 2 Git Repository").
This version also offers snapshots for easy download which you can use if you do not have git present on your system.
````
git clone git://git.icinga.org/icingaweb2.git
````
### Installing Icinga Web 2
Choose a target directory and move Icinga Web 2 there.
````
mv icingaweb2 /usr/share/icingaweb2
````
### Configuring the Web Server
Use `icingacli` to generate web server configuration for either Apache or nginx.
Apache:
````
./bin/icingacli setup config webserver apache --document-root /usr/share/icingaweb2/public
````
nginx:
````
./bin/icingacli setup config webserver nginx --document-root /usr/share/icingaweb2/public
````
Save the output as new file in your webserver's configuration directory.
Example for Apache on RHEL or CentOS:
````
./bin/icingacli setup config webserver apache --document-root /usr/share/icingaweb2/public > /etc/httpd/conf.d/icingaweb2.conf
````
### Preparing Web Setup
You can set up Icinga Web 2 quickly and easily with the Icinga Web 2 setup wizard which is available the first time
you visit Icinga Web 2 in your browser. Please follow the steps listed below for preparing the web setup.
Because both web and CLI must have access to configuration and logs, permissions will be managed using a special
system group. The web server user and CLI user have to be added to this system group.
Add the system group `icingaweb2` in the first place.
Fedora, RHEL, CentOS, SLES and OpenSUSE:
````
groupadd -r icingaweb2
````
Debian and Ubuntu:
````
addgroup --system icingaweb2
````
Add your web server's user to the system group `icingaweb2`:
Fedora, RHEL and CentOS:
````
usermod -a -G icingaweb2 apache
````
SLES and OpenSUSE:
````
usermod -A icingaweb2 wwwrun
````
Debian and Ubuntu:
````
usermod -a -G icingaweb2 www-data
````
Use `icingacli` to create the configuration directory which defaults to **/etc/icingaweb2**:
````
./bin/icingacli setup config directory
````
When using the web setup you are required to authenticate using a token. In order to generate a token use the
`icingacli`:
````
./bin/icingacli setup token create
````
In case you do not remember the token you can show it using the `icingacli`:
````
./bin/icingacli setup token show
````
Finally visit Icinga Web 2 in your browser to access the setup wizard and complete the installation:
`/icingaweb2/setup`.
## Upgrading to Icinga Web 2 Beta 2
Icinga Web 2 Beta 2 introduces access control based on roles for secured actions. If you've already set up Icinga Web 2,
you are required to create the file **roles.ini** beneath Icinga Web 2's configuration directory with the following
content:
````
[administrators]
users = "your_user_name, another_user_name"
permissions = "*"
````
After please log out from Icinga Web 2 and log in again for having all permissions granted.
If you delegated authentication to your web server using the `autologin` backend, you have to switch to the `external`
authentication backend to be able to log in again. The new name better reflects what’s going on. A similar change
affects environments that opted for not storing preferences, your new backend is `none`.
## Upgrading to Icinga Web 2 Beta 3
Because Icinga Web 2 Beta 3 does not introduce any backward incompatible change you don't have to change your
configuration files after upgrading to Icinga Web 2 Beta 3.