---
layout: docs
title: Menu Customization
breadcrumb: [ "advanced.html", "Advanced" ]
---

== Menu Configuration

The main left menu is highly editable through menu_local.conf. It is
recommended apply changes only to your menu_local.conf in order to
avoid conflicts on updating Thruk.

Navigation configuration is split in two files

 * menu.conf
 * menu_local.conf

The menu.conf contains the default side menu configuration. Do not change
it as this file will be overwritten with every update. If you want to
create a complete custom navigation, just copy this file to
menu_local.conf and adjust it to your needs. See the next chapter on
how to add just add a few links without having to copy the complete
file.

The menu_local.conf contains the user configuration for the side menu. It usually
does not exist by default and has to be created in `/etc/thruk/`.

The file itself is perl syntax, so you can do whatever perl can do.
Make sure you verify the syntax after changing the file. The changes
will be used immediately. So maybe you want to test your changes
on a test instance first.

[TIP]
.Syntax Check for Menu Configuration
=======
 %>perl -wc menu_local.conf
 menu_local.conf syntax OK
=======

[TIP]
.No Restart Required
=======
Thruk does not need to be restarted and immediately displays changes in the menu_local.conf.
=======

If you just want to add a few entries, create a empty menu_local.conf
and put these lines into it:

-----
do '/usr/share/thruk/menu.conf';
insert_item('General', { 'href' => 'http://labs.consol.de', 'name' => 'Labs', target => '_blank' });
-----



=== Adding new Section

You can add new sections with:

-----
add_section('name' => 'General');
-----

You can insert sections at a given position with:

-----
insert_section(2, 'name' => 'Projects');
-----


=== Adding a new Link

To add a new link use the following syntax:

-----
add_link('name' => 'Home', 'href' => '/thruk/main.html');
-----

.Available parameters
* name: This is how the link is called in the web front end.
* href: This is the destination link optional you can add.
* target: Target frame for this link. (`_parent` and `_blank` open as popup, `embedded` opens embedded. Empty target opens in the same window.)
* icon: Used for themes which support icons.
* html: If set, all other attributes are ignored and the plain html data is inserted in the menu

Then the config looks like this:

Open grafana in a new window:

-----
add_link('name' => 'Grafana', 'href' => '/grafana', 'target' => '_blank');
-----

Open grafana embedded:

-----
add_link('name' => 'Grafana', 'href' => '/grafana', 'target' => 'embedded');
-----



'add_link' always adds the new link to the last section. Use 'insert_item' to
add a link to any section.


=== Including original side navigation


You can include the main menu config with the perl do statement.
Ex.: If you just want to add a new link to your config menu, your
menu_local.conf could look like this:

-----
do $ENV{'OMD_ROOT'}.'/share/thruk/menu.conf';
add_link('name' => 'Wato', 'href' => '/'.$ENV{'OMD_SITE'}.'/check_mk/wato.py?filename=wato.mk');
-----

This example just puts the Wato link from check_mks Multisite in your
config section. Replace the ENV part with a proper path if you do not
use http://omdistro.org[OMD].


=== Inserting item in existing Section

Adding Items to existing sections can also be achieved by
'insert_item':
-----
do $ENV{'OMD_ROOT'}.'/share/thruk/menu.conf';
insert_item('General', { 'href' => 'http://your-company.com', 'name' => 'Company' });
-----

Use 'insert_sub_item' to create a new sub entry to an existing link.
-----
do $ENV{'OMD_ROOT'}.'/share/thruk/menu.conf';
insert_sub_item('General', 'Home', { 'href' => 'http://your-company.com', 'name' => 'Company' });
-----


=== Removing item in existing Section

Existing Items can be removed with the 'remove_item' function:
-----
do $ENV{'OMD_ROOT'}.'/share/thruk/menu.conf';
remove_item('Reports', 'Availability');
-----

To remove a sub menuitem, use the 3 arguments variant of `remove_item`:
-----
do $ENV{'OMD_ROOT'}.'/share/thruk/menu.conf';
remove_item('Current Status', 'Problems', 'Network Outages');
-----

To remove a sub menuitem hint, use the 4 arguments variant of `remove_item`:
-----
do $ENV{'OMD_ROOT'}.'/share/thruk/menu.conf';
remove_item('Current Status', 'Problems', 'Services', 'Unhandled');
-----


=== Remove complete Section

Existing sections can be removed completely the 'remove_section' function:
-----
do $ENV{'OMD_ROOT'}.'/share/thruk/menu.conf';
remove_section('Reports');
-----


=== Make item available for some groups only

Just wrap your changes in a 'has_group' condition.

-----
if(has_group('Admins')) {
  insert_item('Admins Only', { 'href' => '.../only_for_admins.html', 'name' => 'Admin Link' });
}
-----


=== Make item available for some roles only

Just wrap your changes in a 'has_role' condition.

-----
if(has_role('authorized_for_configuration_information')) {
  insert_item('System', { 'href' => '.../only_for_some_roles.html', 'name' => 'Admin Link' });
}
-----

You can check multiple roles at once:

-----
if(has_role('authorized_for_configuration_information', 'authorized_for_system_information')) {
  insert_item('System', { 'href' => '.../only_for_some_roles.html', 'name' => 'Admin Link' });
}
-----


=== Make item available for some specific user only

Just wrap your changes in a 'is_user' condition.

-----
if(is_user('thrukadmin')) {
  insert_item('Admins Only', { 'href' => '.../only_for_some_user.html', 'name' => 'Admin Link' });
}
-----

=== Add item at specific position

Use `before` or `after` to set a specific position.

-----
insert_item('Current Status', { 'href' => '...', 'name' => 'My Hosts', 'after' => 'Hosts' });
-----


=== Insert arbitrary HTML

It is possible to insert arbitrary HTML in the menu by specifying the html
attribute. You may have to use CSS to style the content to your needs.

-----
  insert_item("General", {html => "<a href='#test'>test: <img src='/thruk/themes/Thruk/images/logo_thruk_small.png'></a>" })
-----


== Examples

=== Hide Reporting for Non-Admins
Create a `/etc/thruk/menu_local.conf` like this:
-----
do $ENV{'OMD_ROOT'}.'/share/thruk/menu.conf';
if(!has_group('Admins')) {
  remove_item('Reports', 'Reporting');
}
-----

[NOTE]
=======
This only hides the reporting menu item, everbody who knows the url can still access it.
=======


=== Add new item with arbitrary HTML

This example adds a link to your company and adds a image icon behind that link.

-----
do $ENV{'OMD_ROOT'}.'/share/thruk/menu.conf';

insert_item('General', {
                'href'   => 'http://your-company.com',
                'name'   => 'Company',
                'target' => '_blank',
                'html'   => '<img src="/thruk/themes/Thruk/images/stop.gif" style="height:16px; width: 16px; vertical-align: bottom;">'
});
-----
