Downtime check

[wolfgangam]

Hello,

I made a simple script to send me an email every-time the raspberry boots up, that way I can know when I get an email that there was a power outage in my house.

I'm trying to improve it by having it send me how long was it down for but I can't find a way to do it.


Thanks

[elParaguayo]

Just an idea: Have your script write the current time to a file, say, every minute. The script can start on boot. The first thing it does is look at the file and see the last time recorded. You can calculate the current difference between the time now and that time and send your email. The script can then start writing the current time to the file again in a loop.

Sorry about formatting, on my phone.

[DougieLawson]

sudo apt-get uprecords uprecords-cgi

Sorted.

It would be quite easy to update the code in uprecords to do the email stuff.

[elParaguayo]

Ha. Sometimes i regret posting when there's an easy answer!

[wolfgangam]

sudo apt-get uprecords uprecords-cgi

Sorted.

It would be quite easy to update the code in uprecords to do the email stuff.

Hi there, I installed uprecord-cgi and I'm not sure it works like I want it to.

I read the man a bit and ran "uprecords -sdB", this is what I got the first time :

Code: Select all

     #               Uptime |        Last downtime                       Boot up
----------------------------+---------------------------------------------------
->   1     0 days, 00:09:40 |   0 days, 00:-05:-40      Fri Nov  4 17:20:45 2016
     2     0 days, 00:09:37 |    0 days, 00:00:-23      Fri Nov  4 17:16:48 2016
     3     2 days, 07:28:28 |     0 days, 00:00:00      Wed Nov  2 09:48:43 2016

unplugged the raspberry for few minutes and ran it again :

Code: Select all

     #               Uptime |        Last downtime                       Boot up
----------------------------+---------------------------------------------------
->   1     0 days, 00:04:23 |     0 days, 00:12:43      Fri Nov  4 17:33:08 2016
     2     0 days, 00:03:36 |   0 days, 00:-09:-36      Fri Nov  4 17:16:49 2016
     3     0 days, 00:09:37 |    0 days, 00:00:-23      Fri Nov  4 17:16:48 2016
     4     2 days, 07:28:28 |     0 days, 00:00:00      Wed Nov  2 09:48:43 2016

and third time after more time unplugged

Code: Select all

     #               Uptime |        Last downtime                       Boot up
----------------------------+---------------------------------------------------
->   1     0 days, 00:04:29 |     0 days, 00:27:11      Fri Nov  4 17:47:36 2016
     2     0 days, 00:03:35 |   0 days, 00:-03:-35      Fri Nov  4 17:16:50 2016
     3     0 days, 00:03:36 |   0 days, 00:-09:-36      Fri Nov  4 17:16:49 2016
     4     0 days, 00:09:37 |    0 days, 00:00:-23      Fri Nov  4 17:16:48 2016
     5     2 days, 07:28:28 |     0 days, 00:00:00      Wed Nov  2 09:48:43 2016

:


It does not seems right...

[DougieLawson]

It does the same thing on one of my Raspberries, looks like a bug in the way uprecords calculates "Last downtime".

There's some open issues at: https://github.com/rpodgorny/uptimed/issues

[wolfgangam]

Any other software that will do Downtime calc?

[elParaguayo]

You could write something very quickly based on my method...

[wolfgangam]

You could write something very quickly based on my method...

I definitely will if there is no software available. thank you

[epoch1970]

I would rather use a stateless system, like apinger between 2 hosts.
Time-of-day is not a reliable information at boot time, esp. on embedded platforms like Pi.

(eg. to know the "true" boot time, wait for NTP to have acquired sync state and clock delta to be small enough, then convert time to epoch, subtract current uptime, and convert that back to time-of-day...)

[wolfgangam]

I wrote a code that will write the epoch time to a file and put the script in cron to run every minute but I can't figure out why cron would not run it...
I tried both bash and python scripts, both work when I ran manually but not with cron..

Python:

Code: Select all

#!/usr/bin/python
import time
import datetime
new_epoch_time = int(time.time())
f = open("epochtime.txt","w")
f.write("%s" % new_epoch_time)
f.close()

Bash:

Code: Select all

#!/bin/bash
date +%s > epochtime.txt

Cron:

Code: Select all

* * * * * /usr/bin/python /home/pi/scripts/epochtime.py >/dev/null 2>&1

[elParaguayo]

Try putting the full path to the txt file in your script.

[wolfgangam]

Try putting the full path to the txt file in your script.

Thank you!