I hope that this hasn't been asked somewhere before (and that it makes sense), but I can't seem to find reference anywhere, nor do the upstart man pages help. Though, I admit, my knowledge of upstart is shaky.
I have a number of Ubuntu and Debian systems which make use of schroot controlled environments to isolate them. In places where I do NOT have an upstart environment, this is easily controlled with /etc/init.d/rc along with a relevant runlevel. (In other words, I run the rc script when the schroot is started, to launch processes.)
My question is, how do I do that for jobs that have been converted to upstart? I can't seem to figure out a method of starting all processes for a given runlevel automatically.