[arm-allstar] RPI with 3 FOBs

[Roger Coudé]

Doug,We use the latest version, doing updates every weeks.We use powerful 5V, typically 4.8 Amperes capable, with battery backup and diezel generator.Most PI are Model 3B, with a few 3B+We used Rim Lite until recently, when they decided not to sell them in Canada. Now we use modified chineese fob.We use optocouplers and audio transformers, all our interfaces are fully galvanicly isolated.
We tried to monitor the performance with uptime, top, etc, but, doing so usually gave no clue and accelerated the total freeze.
The only addition we have of our own is a small script that interogates asterisk and send nodes status to a server via an http link, every minute, called by cron.d
We have optical fiber and a microtik router deserving asterisk and DSTAR machines.
Yesterday I disabled the third node on two sites still running and wait to see if the problem arises.
Stil connected, but not used by asterisk (not flashing).
Repeater sites both do well, no failure yet… Crossing fingers.
73Rogerwww.ve2dbe.com

      De : Doug Crompton via ARM-allstar <arm-allstar at hamvoip.org>
 À : ARM Allstar <arm-allstar at hamvoip.org> 
Cc : Doug Crompton <wa3dsp at gmail.com>
 Envoyé le : mercredi 12 Septembre 2018 12h25
 Objet : Re: [arm-allstar] RPI with 3 FOBs
   
Roger,

 We usually do not recommend more than two USB FOB's per Pi but that was
not because of Pi crashes like you are seeing but rather because of the
potential of causing audio glitches when all were active.

You did not mention what version of software you were running at these
sites? Are you doing updates? The latest is V1.5.3-42. Also what FOB's and
what Pi's? 2B, 3B, 3B+?  What power supply and are you using UPS's? Is the
power quality at the sites good?

Since as you say this seems to happen as a slowing of SSH can you run some
tests at that time like  cpu_stats.sh, free, or top to see CPU and memory
usage. Also do you have any other programs or scripts running you installed
running on these servers?


*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*

On Wed, Sep 12, 2018 at 10:26 AM "Roger Coudé via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> Our network uses 22 Raspberry PI spread all over the province of Québec.
> 11 RPIs with 1 radio
> 7 RPIs with 2 radios
> 3 RPIs with 3 radios
>
> At locations where we have 3 sound cards per RPI, we experienced a lot of
> trouble (computer frozen, very slow ethernet, corrupted SD, missing sound
> card in LSUSB list, etc)
> Those systems are running ok for a few days, but then the SSH begin to be
> very slow, and after a few hours the repeater freezes.
> Most of the time, the systems reset by itself around midnight (Strange
> because I have not programmed it for that).
> After swapping RPIs, power supply, sound cards, we always get an instable
> situation.
> We had to climb mountains many times, sometimes just to power cycle a
> jammed RPI :(
>
> We plan to install a second RPI at those locations in order to never have
> more than 2 sound cards per RPI.
>
> Has anybody encountered the same situation, have a solution for that…
>
> 73
> Roger VE2DBE
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