[uml-devel] Which UPS simulator?

[uml-devel] Which UPS simulator?

[Dan Shearer]

I propose using a standard UPS interface as a way for mconsole to
trigger a full system shutdown. I don't know the UPS market well and am
hoping someone can point me a to a more open protocol that what I've
found so far. This doesn't solve the bigger problem of UML control from
mconsole, but it addresses one immediate need.

The key thing is that this doesn't require the user of the uml to use
any special software or configurations, which in turn means I don't have
to give anyone any more training than a URL for standard Linux UPS
software.

http://quasar.mathstat.uottawa.ca/~selinger/ups/simulator.c is easy to
find. It mostly implements an informally documented protocol
(http://quasar.mathstat.uottawa.ca/~selinger/ups/belkin-universal-ups.html)
and is GPLd. Some slight mods in how the communications happen and this
could be how mconsole talks to a ups daemon listening on one of the
virtual serial ports. Not sure if this includes upsd that comes with
many distros however this UPS is listed as supported at
http://eu1.networkupstools.org.

Anyone know of a simulator for a more open/more appropriate UPS protocol
that is understood by more than one of the open source UPS daemons?

-- 
Dan Shearer
dan@shearer.org


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Re: [uml-devel] Which UPS simulator?

[Michael Koehne]

Moin Dan Shearer,

  why UPS simulation ? I'm using normal mconsole cad feature to power
  down my UMLs. I only have to ensure that the inittab will trigger a
  halt with "ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -h now" instead
  of rebooting. I then have some helpfull scripts.

  /opt/uml/bin/uml is using screen :

#------------------------------------------------------------------------------
#!/bin/sh

[ $# = 1 ] || {
    echo usage: uml machine
    exit 0
    }
[ -f /opt/uml/$1/$1.config ] || {
    echo machine $1 not defined
    }

if [ -f /opt/uml/$1/$1.running ]
then
    screen -d -r $1
else
    screen -S $1 /opt/uml/bin/uml-start $1
fi
exit 0
#------------------------------------------------------------------------------
  
  /opt/uml/bin/uml-start does a filesystemcheck :

#------------------------------------------------------------------------------
#!/bin/sh

cd /opt/uml/

[ `whoami` != "root" ] && {
        echo "only root can use $0"
        exit 1
        }
[ $# != 1 ] && {
        echo "usage: $0 name"
        exit 0
        }
[ ! -f $1/$1.root.img ] && {
        echo "$1/$1.root.img not found"
        exit 0
        }
[ ! -f $1/$1.swap.img ] && {
        echo "$1/$1.swap.img not found"
        exit 0
        }
[ ! -f $1/$1.options ] && {
        echo "$1/$1.options not found"
        exit 0
        }
[ ! -f /opt/uml/$1/$1.linux ] && {
        echo "/opt/uml/$1/$1.linux not found"
        exit 0
        }
[ -f $1/$1.running ] && {
        echo "$1 already running"
        exit 0
        }

touch $1/$1.running

[ -d $1/$1.root.fs/lost+found ] && umount $1/$1.root.fs
[ -d $1/$1.work.fs/lost+found ] && umount $1/$1.work.fs

echo checking file systems :
[ -f $1/$1.root.img ] && e2fsck -y -f -v $1/$1.root.img
[ -f $1/$1.work.img ] && e2fsck -y -f -v $1/$1.work.img
echo done.

/opt/uml/$1/$1.linux `cat $1/$1.options`

# [ -d $1/$1.root.fs ] && mount -o loop $1/$1.root.img $1/$1.root.fs
# [ -d $1/$1.work.fs ] && mount -o loop $1/$1.work.img $1/$1.work.fs

rm -f $1/$1.running

exit 0
#------------------------------------------------------------------------------

  /opt/uml/bin/uml-stop will halt systems

#------------------------------------------------------------------------------
#!/bin/sh

cd /opt/uml

echo -n UML shutdown systems :

for s
do
    x=$s/$s.running
    if [ ! -f "$x" ] 
    then
        echo " no systems up."
        exit 0
    else
        echo -n " $s "
        echo cad | uml_mconsole $s 2>/dev/null >/dev/null
        echo -n ".";sleep 1
        echo -n ".";sleep 1
        echo -n ".";sleep 1
    fi
done

echo done.

echo -n UML waiting for systems :
while true
do
    for s
    do
	x=$s/$s.running
        if [ ! -f "$x" ] 
        then
            echo all systems down.
            exit 0
        else
            echo -n " $s "
        fi
    done
    echo -n ".";sleep 1
    echo -n ".";sleep 1
    echo -n ".";sleep 1
done
#------------------------------------------------------------------------------

  ask me for a complete shar.gz or tar.gz of my current UML environment :

  uml          uml-copydef      uml-gen      uml-start     uml-tunctl
  uml-bkup     uml-createfs     uml-mount    uml-startall  uml-umount
  uml-bkupall  uml-forward      uml-net      uml-stop      uml_switch
  uml-config   uml-forward-old  uml-running  uml-stopall
  uml-copyall  uml-fsck         uml-screen   uml-tap1

  each UML is defined by a small text config file, so a lot of UMLs
  can be managed in a simple way. Backups for virtual UML machines 
  and migration to other hosts is semiautomatic. e.g. noam is the
  site hosting www.copyleft.de and other domains :

#------------------------------------------------------------------------------
HOST="noam"
DOMAIN="copyleft.de"
MODULES=""

#ETH0OPT="tuntap,,,193.101.47.67"
ETH0BASE="193.101.47"
ETH0WORK="193.101.47.64"
ETH0GATE="193.101.47.65"
ETH0ADDR="193.101.47.67"
ETH0CAST="193.101.47.95"
ETH0MASK="255.255.255.224"

NAMESERVER="193.101.47.33"
PROXY="193.101.47.33:3128"

ROOT="/dev/ubd0"
SWAP="/dev/ubd1"
WORK="/dev/ubd2"

STORSIZE=64
SWAPSIZE=128
ROOTSIZE=256
WORKSIZE=2048
#------------------------------------------------------------------------------

  I recently reinstalled my Libretto laptop :
      Linux makhno 2.6.1-l5skas1 #1 Wed Feb 4 02:25:54 UTC 2004 i686 GNU/Linux
  All i had to do to to run noam on this machine was :

  ssh makhno mkdir -p /opt/uml/bin
  scp /opt/uml/bin/* makhno:/opt/uml/bin
  uml-copydef skel makhno
  uml-copydef noam makhno
  uml-bkup noam makhno
  ssh makhno
  export PATH=/opt/uml/bin:$PATH
  uml-net
  uml noam

Bye Michael
-- 
  mailto:kraehe@copyleft.de             UNA:+.? 'CED+2+:::Linux:2.4.22'UNZ+1'
  http://www.xml-edifact.org/           CETERUM CENSEO WINDOWS ESSE DELENDAM


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Re: [uml-devel] Which UPS simulator?

[Dan Shearer]

On Thu, Feb 12, 2004 at 04:00:23PM +0100, Michael Koehne wrote:
> Moin Dan Shearer,
> 
>   why UPS simulation ? I'm using normal mconsole cad feature to power
>   down my UMLs. I only have to ensure that the inittab will trigger a
>   halt with "ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -h now" instead
>   of rebooting. I then have some helpfull scripts.

That is exactly what I want to avoid. I want a more accurate UML where
no UML-specific logic is needed for communication -- from one point of
view that is what communication is all about. There are plenty of ways
of introducing new communications methods (such as you have done, or a
special listening port, etc) into the UML. 

-- 
Dan Shearer
dan@shearer.org


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Re: [uml-devel] Which UPS simulator?

[Michael Koehne]

Moin Dan Shearer,

> That is exactly what I want to avoid. I want a more accurate UML where
> no UML-specific logic is needed for communication -- from one point of
> view that is what communication is all about. There are plenty of ways
> of introducing new communications methods (such as you have done, or a
> special listening port, etc) into the UML. 

  implementing an UPS would also only require existing uml technics, as
  APC and Berkin UPS are talking to a serial line. But it would require
  some special program running inside and outside your UML, while my
  simple script only require to cad line to be right.

  see http://quasar.mathstat.uottawa.ca/~selinger/ups/simulator.c
  for Berkin simulator and demons, or reference apcupsd for APC 
  and reverse enginier a simulator.

Bye Michael
-- 
  mailto:kraehe@copyleft.de             UNA:+.? 'CED+2+:::Linux:2.4.22'UNZ+1'
  http://www.xml-edifact.org/           CETERUM CENSEO WINDOWS ESSE DELENDAM


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Re: [uml-devel] Which UPS simulator?

[Dan Shearer]

On Fri, Feb 13, 2004 at 02:01:27AM +0100, Michael Koehne wrote:
> Moin Dan Shearer,
> 
> > That is exactly what I want to avoid. I want a more accurate UML where
> > no UML-specific logic is needed for communication -- from one point of
> > view that is what communication is all about. There are plenty of ways
> > of introducing new communications methods (such as you have done, or a
> > special listening port, etc) into the UML. 
> 
>   implementing an UPS would also only require existing uml technics, as
>   APC and Berkin UPS are talking to a serial line. But it would require
>   some special program running inside and outside your UML, while my
>   simple script only require to cad line to be right.

Just depends on what you want to achive. You are correct, but your way
requires something different to real life. My point remains that a UML
user with root has only to run "some special program" that is a standard
UPS tool that he can read about in any Linux reference.

>   see http://quasar.mathstat.uottawa.ca/~selinger/ups/simulator.c
>   for Berkin simulator and demons, or reference apcupsd for APC 
>   and reverse enginier a simulator.

Read my original message, where I quoted exactly this URL (and Cc'd the
author.)

-- 
Dan Shearer
dan@shearer.org


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