The user interface

1. Introduction

Check_MK's web-based, graphic user interface (GUI) has two functions:

  • It displays the current status of all hosts, services and events.
  • It is used to configure Check_MK. The relevant module is known as WATO.

A feature of Check_MK's interface is that it can simultaneously display and configure multiple monitoring instances, and then act like a large system. The following screenshot shows a Check_MK start screen directly after logging in:

Here you can see the following elements:

1 Your Check_MK installation's version. Clicking on the version number opens a summary of updates for this version.
2 The Tactical Overview with the number of monitored hosts and services, the current problems and the number of those that are unacknowledged. You can click on these numbers and receive a summary for each. Problems from services whose host is DOWN, will not be included here!
3 An interactive field for searching for hosts and services. More about this later below...
4 Views offers access to various displays of hosts, services and other information from the current monitoring.
5 On the sidebar's lower edge there are three buttons: takes you to a selection of the elements available for the sidebar, to your personal settings, and with you can log out of the Check_MK interface.
6 In every page's header you will find the name of the logged in user, their role and the timestamp for the page's last refresh.
7 Host Statistics shows the count of hosts in the various states - by number and in a spatially true-to-scale graphic.
8 Service Statistics shows the services, as above for hosts
9 A list of all host problems that are currently unacknowledged. Clicking on the box's title opens an enlarged view.
10 As for the unacknowledged service problems
11 Monitoring events recorded over the last four hours

The dashboard on the right side can be customised. You can find our more in the article on dashboards.

2. The sidebar

The section on the left side - the sidebar - offers quick access to all of the functions in Check_MK. Some elements - e.g. the Tactical Overview - also show current status information so that you can continously monitor it. If the sidebar doesn't fit completely in your screen's area you can scale it with the mousewheel or by clicking on and dragging the dark area of an element up or down.

In addition, as a user you can easily customise the sidebar's content. Elements can be...

  • ...opened and closed with a click on the title bar,
  • ...repositioned by clicking and dragging on the title bar,
  • ...removed by clicking on the corner cross.

With the button you can access a selection of elements that are not currently in your sidebar, but which can be added with a simple click:


Bookmarks are an easy option in Check_MK for faster access to regularly used pages. In the sidebar element Bookmarks, every page you can see on the right side can be saved as a bookmark. If you are on the desired paged or a filtered view that you would like to save, then click on Add Bookmark. The new bookmark will be stored in the My Bookmarks field. This field can be opened by clicking on the small arrow symbol.

3.1. Editing bookmarks

Check_MK manages bookmarks in lists. In addition, every bookmark has a Topic. In the display all bookmarks with the same topic are under one rubric where each can be expanded and collapsed. Why so complicated? So that you can make a list of bookmarks visible to other users. In this way, for your company you can build a navigations structure to specific views and even to external pages. Every user can nonetheless still manage their own bookmarks.

The EDIT button accesses the bookmarks manager:

You can either edit existing lists with or with New create a completely new list. The Title for a list is not important - it is only used for management. Where the bookmarks are sorted is decided by the Default topic in the list or respectively by an individual bookmark's Topic - if this has been set. By the way, you can give bookmarks their own icons.

Via Make available for all users you can make the bookmark visible to all users. This requires an authority however, which by default is held only by the Administrator role. This principle of visibility is used by Check_MK in many locations, and is explained in more detail in the views article.