Symptom
The System Uptime metric in the health monitoring Hardware/Environment Status category does not show the uptime of a particular Secure Firewall Threat Defense (FTD) instance.
Instead it shows the uptime of the security engine also known as the blade.
Conditions
First seen when all conditions are in place:
1. Firepower 4100/9300 security engine in with container instance (or multiple instance) deployment mode.
2. The System Uptime metric in the health monitoring Hardware/Environment Status category is activated.
Workaround
In the Firepower eXtensible Operating System (FXOS) shell, check the difference between current time and the actual timestamp for online event of a particular instance:
KSEC-FPR4100-5 /ssa # show clock
Thu Nov 16 13:31:41 UTC 2023 <=======
KSEC-FPR4100-5 /ssa # show event
Creation Time ID Code Description
------------------------ -------- -------- -----------
2023-11-16T10:32:44.785 197151 E4197975 App-instance ftd-ftd1 on slot 1 is online. <=======
2023-11-16T10:31:20.069 197140 E4197973 App-instance ftd-ftd1 on slot 1 is not responding.
2023-11-15T12:57:27.544 195955 E4197975 App-instance ftd-ftd1 on slot 1 is online.
2023-11-15T12:52:23.966 194952 E4197976 App-instance ftd-ftd1 on slot 1 is started.
2023-11-15T12:50:32.237 194920 E4197978 App-instance ftd-ftd1 on slot 1 is starting.
2023-11-15T12:50:14.997 194912 E4197974 App-instance ftd-ftd1 on slot 1 is offline.
2023-11-15T12:45:51.311 194881 E4197971 App-instance ftd-ftd1 on slot 1 is installing.
Further Problem Description
