I'm using monit, which watches over processes, load, disk usage, etc, and then does what it's supposed to do on its own. If a process dies, monit can restart it. So it does a lot of work so that I don't have to do it. The monit site is http://mmonit.com/, and there is a more detailed installation howto here http://www.ubuntugeek.com/monitoring-ubuntu-services-using-monit.html
Obviously, monit can watch over media center related stuff the same as it can watch over anything else. But since this is a media center forum, here are a couple of my monit recipes that are more media center focused:
deluged.conf:
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check process deluged with pidfile /var/run/deluged.pid
group noncritical
start program = "/etc/init.d/deluge-daemon start" with timeout 60 seconds
stop program = "/etc/init.d/deluge-daemon stop"
if cpu is greater than 80% and loadavg(1min) is greater than 4 then restart
if not exist then start
if 10 restarts for 10 cycles then alert
samba.conf (which is basicly the same as the examples on the monit site):
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check process samba with pidfile /var/run/samba/smbd.pid
start program = "/etc/init.d/smbd start" with timeout 60 seconds
stop program = "/etc/init.d/smbd stop"
if failed host 192.168.1.2 port 139 type TCP then restart
if 5 restarts within 5 cycles then timeout
disks.conf:
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CHECK FILESYSTEM sda1 with PATH /
if space usage > 90 % then alert
if inode usage > 85 % then exec "/usr/bin/find /tmp -ctime +2h -delete"
if inode usage > 90 % then alert
CHECK FILESYSTEM shadow with PATH /hot/sdb5
if space usage > 90 % then alert
if inode usage > 85 % then exec "/usr/bin/find /hot/sdb5/tmp -ctime +2h -delete"
if inode usage > 90 % then alert
Those may not be perfect and could probably be better, but they work well enough for me.
