 |
How-To: Configure a monitored device which depends on another device.
IPSentry provides a method to set some devices to be checked depending on the status of another device. This feature is known as a dependency.
Say for instance that you are monitoring several web servers that reside on the other side of a critical router. There may be no need to attempt access to the web servers if you know the router is non-functioning. This presents us with an ideal case for a dependency structure where the web servers should not be checked if the router is down.
In this example, we will make a couple of assumptions.
You have already configured three web server entries for the servers WEB_A, WEB_B, WEB_C
You have configured a monitoring entry for ROUTER_A using simple ICMP-Ping.
You have configured the alert functions of each.
The only task remaining is to tell IPSentry that WEB_A, WEB_B, and WEB_C should only be checked if ROUTER_A is accessible.
To accomplish this, the following steps provide the quickest solution.
From the IPSentry active display console,
select Options from the Edit menu.
Click on the Server/Machine Monitoring tab.
Highlight the ROUTER_A entry.
Click the Properties button.
On the Server Settings tab, click the
Add button located next to Current Dependents list.
You will be presented with a list of machines available as dependents to
this device.
Click on WEB_A, WEB_B, WEB_C to place a checkmark next to each.
Click on OK
You will notice that in the box to the right of Current Dependents, the items you have selected will appear.
The above will cause the following scenario to exist.
ROUTER_A is checked
If OK - WEB_A, WEB_B, and WEB_C are checked.
If ROUTER_A fails, alerts are triggered and WEB_A, WEB_B, WEB_C are skipped due to ROUTER_A failure.
This can go even a step further such that ROUTER_A is dependent on yet another device - ROUTER_B. If you perform the same steps above yet substituting ROUTER_A with ROUTER_B , you can set ROUTER_A as a dependent of ROUTER_B. This would then cause the following scenario.
ROUTER_B is checked.
If OK - ROUTER_A is checked
If OK - WEB_A, WEB_B, and WEB_C are checked.
Notice that in the above case, WEB_A, WEB_B, WEB_C are only checked if BOTH ROUTER_B and ROUTER_A are accessible.
Note: The limit of nesting level of dependencies is 50 devices however, the number of devices that can be tied to a parent is not limited.
|
|
||
| Contact: support@ipsentry.com | https://ipsentry.com | © 2006 by RGE, Inc. - All Rights Reserved |