The Host Group menu item provides a global view of all the hosts displayed by group.
APM | Status | Host Group
Here you can view the state of each host, the number of services running and the status of each service. In the “Actions” column you can manage your hosts, view detailed statistics of their activities, or consult their operating states.
If you click on the small icon available in the “Actions” column, a new page for the host in question appears, providing further information on the selected host. You can see various information related to the host like the last time it has been checked, the next scheduled attempt, current attempt, etc…
On the right side of the same page, a Host Commands table appears. Here is a list of the most commonly used commands:
- The “Locate host on map” option let you see on a map where the host is located.
- The “Disable active checks of this host” option allow to disable further check for the host.
- The “Re-schedule the next check of this host” option let you force the check so that you don’t have to wait for the next check in the pool.
- The “Disable notifications for this host” option allow to completely disable the sending of alert for the host, useful when you know that the host will be in problem for a long period of time.
- The “Schedule downtime for this host” parameter is useful when you know that you have some maintenance downtime that come. You can use this feature to inform the system about the upcoming downtime so that during this scheduled downtime, no alerts will be sent and reports will not take in consideration the downtime.
- The “Disable event handler for this host” let you deactivate possible automatic action which may be associated to the host when state change. For example you check a host and if this host is down after tree consecutive checks, then an action (a script) will be run to try to restart the host before sending an alert to the administrator.
- The “Disable flap detection for this host” allow you to deactivate flap election. A flap detection happen when a host or service change its state to frequently (up/down) so that no real metric could be captured. when this happen, the system will automatically disable sending of alerts until the host stability return.
The icon available in the “Actions” column, opens a new page where you will find several diagrams related to the host services.
You can manipulate each chart with the mouse, selecting (zooming into) the time period that interests you.
Several options are available on the right side of the page. If you click on the calendar, you will see a menu allowing you to target a time frame in which you want to view the performance data collected by APM. The information button provides access to the internal statistics of the engine generating these graphs.
You also have the option to export the desired information to a PDF file.