Icinga
Icinga is used to monitor alerts that we have set up. It can be a bit hard to navigate but there are only a few views you need to know about (listed in the left-hand navigation):
- Unhandled Services
- Alert History
Alternatively, you can pull these into one local dashboard by setting up Nagstamon.
Scanning alerts
- If an alert is red or has a
icon it is critical - If an alert is yellow or has a
icon it is a warning - If an alert is green or has a
icon it has recently recovered - If an alert is purple or has a
icon Icinga cannot retrieve data for it - If an alert has a
icon the alert is coming on and off or ‘flapping’
External URLs
A service may have two additional URLs associated with it which will assist in investigating alerts. These are included in the Icinga interface with these icons:
- Action URL (
) typically links to a graph. If the check uses
Graphite for its source of data then the graph will also include the
warning and critical threshold bands. - Notes URL (
) links to a page in this manual describing why a given check
exists and/or how to go about resolving it.
They will appear next to the service name in the service overview page or on the top-right of the page when viewing a specific service.
Digging deeper
If you want to dig a little deeper into the history of a specific alert click on it in the “Unhandled Services” view. In the top left of the main window there a few links. “View Alert Histogram For This Service” and “View Trends For This Service” are particularly useful.