Hi Michael,
We are running r6531 and I’ve just had a device flag as rebooted after the counter rolled over at 497 days, are we sure this improvement is working as intended?
Thanks,
Tim C
From: observium [mailto:observium-bounces@observium.org] On Behalf Of Mike Stupalov Sent: 22 May 2015 10:06 To: observium@observium.org Subject: Re: [Observium] What triggers the 'device rebooted' alert?
On 21.05.2015 22:57, Michael Vieth wrote:
Did the math, and this makes since. Thank you. The math checks out that this device will rollover in uptime every 497 days.
Rollover reboot issue after 497 days now should be fixed since r6419.
Cheers,
Michael Vieth
From: observium [mailto:observium-bounces@observium.org] On Behalf Of Phillip Baker Sent: Thursday, May 21, 2015 9:34 AM To: Observium Network Observation System Subject: Re: [Observium] What triggers the 'device rebooted' alert?
Okay, but sysUptime is not recorded in seconds but 1/100ths of a second. Also, 32bit signed integer is only good for 135 years with one second resolution (as time doesn’t start from negative numbers, it’s only really 2^31 available space)
From: observium [mailto:observium-bounces@observium.org] On Behalf Of Michael Vieth Sent: 21 May 2015 15:25 To: Observium Network Observation System Subject: Re: [Observium] What triggers the 'device rebooted' alert?
It says it is an eight-byte signed integer. That’s 2^63 correct? There should be several millennia before a rollover if my interpretation is correct.
Cheers,
Michael Vieth
From: observium [mailto:observium-bounces@observium.org] On Behalf Of Phillip Baker Sent: Thursday, May 21, 2015 9:14 AM To: Observium Network Observation System Subject: Re: [Observium] What triggers the 'device rebooted' alert?
This is a standard issue with 32 bit counters and uptimes, so I’d start with google first! J
This isn’t an observium/database issue.
Phil
From: observium [mailto:observium-bounces@observium.org] On Behalf Of Michael Vieth Sent: 21 May 2015 15:04 To: Observium Network Observation System Subject: Re: [Observium] What triggers the 'device rebooted' alert?
Right, the graph shows an uptime of ~ 8 hours now, but the device itself says 497 days. Which observium concurs with… until about 8 hours ago.
I’m not great with sql so am getting a co-worker to pull the DB info to see if that sheds any more light on the issue.
Cheers,
Michael Vieth
From: observium [mailto:observium-bounces@observium.org] On Behalf Of Spencer Ryan Sent: Thursday, May 21, 2015 8:38 AM To: Observium Network Observation System Subject: Re: [Observium] What triggers the 'device rebooted' alert?
Device-->Graphs-->System tab. One of the graphs will show you uptime.
Spencer Ryan | Senior Systems Administrator | mailto:sryan@arbor.net sryan@arbor.net
Arbor Networks
+1.734.794.5033 (d) | +1.734.846.2053 (m)
http://www.arbornetworks.com/ www.arbornetworks.com
On Thu, May 21, 2015 at 9:36 AM, Michael Vieth MVieth@nexatech.com wrote:
Right, I checked my config.php and saw it as a 24hour setting.
I’ll look in the database for any uptime count.
Cheers,
Michael Vieth
From: observium [mailto:observium-bounces@observium.org] On Behalf Of Spencer Ryan Sent: Thursday, May 21, 2015 8:25 AM To: Observium Network Observation System Subject: Re: [Observium] What triggers the 'device rebooted' alert?
A device uptime of < 24 hours by default.
My guess is the SNMP counter rolled over on whatever device it's monitoring so observium sees it as a reboot.
Spencer Ryan | Senior Systems Administrator | mailto:sryan@arbor.net sryan@arbor.net
Arbor Networks
+1.734.794.5033 tel:%2B1.734.794.5033 (d) | +1.734.846.2053 tel:%2B1.734.846.2053 (m)
http://www.arbornetworks.com/ www.arbornetworks.com
On Thu, May 21, 2015 at 9:23 AM, Michael Vieth MVieth@nexatech.com wrote:
I am showing a device reboot alert but the uptime is shown to be over a year.
The reboot is reported to happen last night precisely at midnight.
Using version 0.15.3.6343
Cheers,
Description:cid:image001.jpg@01CA15C7.9F525A10
Michael Vieth | Network Engineer
Nexa Technologies
801 E Campbell Rd. Ste 400 | Richardson, TX 75081
Phone: (972) 590-8669 x1906 tel:%28972%29%20590-8669%20x1906
www.nexatech.com http://www.nexatech.com/
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