Autosuspend + WoL Gentoo NAS

Derzeit betreiben wir ein Gentoo NAS in unserem Heimnetzwerk da der Windows 2008 Homeserver ziemliche performance Probleme hatte und das „Lights Out“ fuer den Upgrade von 2003 nochmal lizenziert haette werden muessen.
Um die Funktionalitaet auch jetzt wieder zu haben entschieden wir uns fuer eine Wake on LAN und Suspend to RAM Loesung.

Fuer das Suspend to RAM haben wir pm-utils und ethtool emerged und ein kleines Bash Skript geschrieben. Inspiriert wurden wir dabei von der Loesung hier.

Pakete installieren

emerge pm-utils ethtool

1	emerge pm-utils ethtool

WoL auf der Netzwerkkarte enabeln

ethtool -s eth0 wol g

1	ethtool -s eth0 wol g

Wichtig: nach dem Reboot ist die Einstellung verloren, deswegen sollte sie beim booten von einem Skript gesetzt werden.

Skript erstellen od. download

vim autosuspend.sh

1	vim autosuspend.sh

#!/bin/bash

SUSPEND='/usr/sbin/pm-suspend'
CLIENTS='tomato potato'
CHECK_THRESHOLD='3'
CHECK_COUNT_FILE='/root/suspend_count'
LOG_FILE='/var/log/autosuspend.log'

function my_log() 
{
	typeset message="$1"
	echo "$(date +'%Y-%m-%d %H:%M:%S')  $message" &gt;&gt; $LOG_FILE
}

function clients_online()
{
	typeset flag_online='0'

	for client in $CLIENTS
	do
		ping -c 1 $client &amp;&gt;/dev/null

		if [ $? == 0 ]
		then
			flag_online='1'
		fi	
	done

	echo $flag_online
}

function reset_suspend_count()
{
	my_log "Reseting Suspend Timer"
	echo 0 &gt; $CHECK_COUNT_FILE
}

function get_suspend_count() 
{
	if [ -r $CHECK_COUNT_FILE ]
	then
		count=$(cat $CHECK_COUNT_FILE)
	else
		my_log "$CHECK_COUNT_FILE is not readable"
		echo "$CHECK_COUNT_FILE is not readable"
	fi

	echo $count
}

function incr_suspend_count()
{
	count=$(get_suspend_count)
	my_log $count
	echo $(expr $count + 1 ) &gt; $CHECK_COUNT_FILE
	my_log "Incrementing Suspend Timer"
}

if [[ $(id -u) != 0 ]]
then
	echo "This script must be run as root user"
	exit 1
fi

if [[ $(clients_online) == '1' ]]
then
	my_log "All users Online"
	reset_suspend_count
else
	incr_suspend_count

	if (( "$(get_suspend_count)" &gt;= "$CHECK_THRESHOLD" ))
	then
		logger "Suspend timer threshold reached. Suspending the system."
		my_log "Suspend timer threshold reached. Suspending the system."
		$SUSPEND
	fi
fi

exit 0

#!/bin/bash

SUSPEND='/usr/sbin/pm-suspend'

CLIENTS='tomato potato'

CHECK_THRESHOLD='3'

CHECK_COUNT_FILE='/root/suspend_count'

LOG_FILE='/var/log/autosuspend.log'

function my_log()

{

typeset message="$1"

echo "$(date +'%Y-%m-%d %H:%M:%S') $message" >> $LOG_FILE

}

function clients_online()

{

typeset flag_online='0'

for client in $CLIENTS

ping -c 1 $client &>/dev/null

if [ $? == 0 ]

then

flag_online='1'

done

echo $flag_online

}

function reset_suspend_count()

{

my_log "Reseting Suspend Timer"

echo 0 > $CHECK_COUNT_FILE

}

function get_suspend_count()

{

if [ -r $CHECK_COUNT_FILE ]

then

count=$(cat $CHECK_COUNT_FILE)

else

my_log "$CHECK_COUNT_FILE is not readable"

echo "$CHECK_COUNT_FILE is not readable"

echo $count

}

function incr_suspend_count()

{

count=$(get_suspend_count)

my_log $count

echo $(expr $count + 1 ) > $CHECK_COUNT_FILE

my_log "Incrementing Suspend Timer"

}

if [[ $(id -u) != 0 ]]

then

echo "This script must be run as root user"

exit 1

if [[ $(clients_online) == '1' ]]

then

my_log "All users Online"

reset_suspend_count

else

incr_suspend_count

if (( "$(get_suspend_count)" >= "$CHECK_THRESHOLD" ))

then

logger "Suspend timer threshold reached. Suspending the system."

my_log "Suspend timer threshold reached. Suspending the system."

$SUSPEND

exit 0

chmod +x autosuspend.sh

1	chmod +x autosuspend.sh

Log- und Counter datei erstellen

touch suspend_count.sh
touch /var/log/autosuspend.sh

1 2	touch suspend_count.sh touch /var/log/autosuspend.sh

Crontab eintrag erstellen

*/5 * * * *     /root/autosuspend.sh

1	/5 * * * /root/autosuspend.sh

enjoy…

Autosuspend + WoL Gentoo NAS

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