My Linode CPU has maxing out, all sites not responsive. I tried a restart of Apache from inside Virtualmin and received

Failed to re-start service :
Starting web server: apache2(98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
failed!

I tried a reboot from the Linode control panel and this fixed it.

Is there any way I can make the server restart when the CPU maxes out, to avoid this happening again?

Your CPU shouldn't max out in the first place.

The most likely culprit is the MaxClients setting in Apache. The default value is way too high for a Linode. Cut it down to something like 20.

If it is a memory problem (which will also peg the cpu), you can follow the guide at http://www.linode.com/wiki/index.php/Rebooting_on_OOM

_________________
--
Chris Bryant

... I should probably check that PO box for SASEs, shouldn't I ...

_________________

/* TODO: need to add signature to posts */