Keywords: Supervision, Icinga, Nagios, Linux

Introduction to Icinga Web
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## Introduction to Icinga Web

Overview

This introduction takes you on a short tour showing some aspects of Icinga Web. It is not complete so there will be things which aren't covered. We're working on this.

If you followed the quickstart guides (IDOUtils and Icinga Web) then please open your browser and enter http://<icinga server>/icinga-web. You will get the login screen

Figure 6.1. Icinga Web login screen

You should be able to login using "root" and "password". This will take you to an overview page showing the state of the hosts and services being monitored

Figure 6.2. Icinga Web overview

Main Screen

This is where everything comes together: You can drag and drop new windows over here resulting in a new opened tab. The views are customizable for the current user (they remain persistent) by dragging the column heading to the new place. Rightclicking on the heading allows to change the sort order or to hide columns. Selected search results will be opened here too, next to opening available cronks.

Figure 6.3. Icinga Web main screen

Status Cronk

The status cronk shows host and service counters for their respective states. If count is zero, the colour remains grey. Clicking on states opens a new tab in the main view showing the current clicked state only. Next to that, general process information is provided, just as

- Hosts|Services (active/passive)

- Host|Service execution time (min/avg/max)

- Host|Services latency (min/avg/max)

Figure 6.4. Icinga Web status cronk

Top menu

The top menu consists of general information about Icinga and the administration items for users, groups and logs. On the top right, you can see the user currently logged in and edit its preferences or log out of Icinga Web.

Figure 6.5. Icinga Web top menu

Left menu

In the left (also hideable) menu you can select among different widgets (we call them "cronks"). You can either doubleclick on each cronk or drag it with the cursor into the main view. The categories are separated into

- "Data" for getting status, historical and configuration data

  Figure 6.6. Icinga Web data cronks

- "Tactical Overview" keeps general charts and customized ones (custom variables)

  Figure 6.7. Icinga Web tactical overview cronks

- "Misc" contains several useful cronks, just as iframe for external websites or the 1,2,3 columns for main view

  Figure 6.8. Icinga Web misc cronks

Search

The search form shows results while typing. The results will be shown in a separate inlay window. By clicking/selecting the results, a new tab in the main view opens with more information. Please note that the search is currently case sensitive ("ping" vs. "PING").

Figure 6.9. Icinga Web live search

Log

At the bottom, the current Icinga log is being shown. The log is refreshed automatically and can be hidden in order to allocate more space for the main view.

Figure 6.10. Icinga Web log

Cronks and Views

Icinga Web allows to open different cronks in order to view data, set filters for different views, send commands. The following list summarizes the possibilities in general (several Cronks can provide more, like sending commands).

Figure 6.11. Icinga Web cronk bar

- Manual Refresh

- Settings

  Enable/Disable Auto-Refresh

  Get this <item> by url

Figure 6.12. Icinga Web cronk bar

- Filter

  Modify/Remove

Commands

There are different commands available (check the chapter External Commands for more information on commands). Select the items which should be affected and then select the command to be executed.

- Host Commands

  Figure 6.13. Icinga Web host commands

- Service Commands

  Figure 6.14. Icinga Web service commands

Filters

Icinga Web allows to set filters and create customized views which can be saved as own persistent cronk too. First, select "Filter" and "Modify". Add a restriction selected from the dropdown menu (this differs for various cronks). You can set more restrictions by repeating this procedure.

Figure 6.15. Icinga Web filter restriction

Afterwards, specify on which condition the filter should match on the selected restriction (contain, does not contain, is, is not) and add a value into the form. Proposals are shown while you are typing.

Figure 6.16. Icinga Web filter condition

Apply the filter to the current cronk. If needed, you can modify the filter afterwards and add/remove restrictions and conditions. An active filter is marked red.

Figure 6.17. Icinga Web filter active

Administration

Enter the administration panel by selecting "Admin" from the top menu, and select "Users", "Groups" or "Logs".

Figure 6.18. Icinga Web top menu admin

Users

You can add, remove and edit users.

Figure 6.19. Icinga Web user admin

Doubleclick a user to open a new inlay window which lets you edit very detailed options. The same options apply when adding a new user. You can modify the size by dragging the cursor in the corners.

- General information

- Change password (and optional AuthKey for API)

- Permissions e.g. which group membership

- Principals for special roles

Figure 6.20. Icinga Web edit user

Groups

You can add, remove and edit groups. You can also modify group inheritance within the group tree on the right side.

Figure 6.21. Icinga Web group admin

Doubleclick a group to open a new inlay window which lets you edit very detailed options. The same options apply when adding a new group. You can modify the size by dragging the cursor in the corners.

- General information + Permissions (which users are part of this group)

- Principals for special roles

Figure 6.22. Icinga Web groups

Principals

Within the user and group administration panel, you can add/remove/edit principals. You can see default available principals in the picture:

Figure 6.23. Icinga Web principals

Logs

You can view several logs here, in order to catch up on possible errors.

Figure 6.24. Icinga Web logs

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