Re: Jails: An rc.d script

[William M. Grim]

Very odd, my jails.sh script was not allowed to pass or something.  So, 
I'm pasting it into this email.

#!/bin/sh
#
# Start the jails at boot-up.
# The only jails it can start properly are the ones in directories labelled
# with an IP address.
JAILBASE=/usr/local/var/jail
LS="/bin/ls"
JLS="/usr/sbin/jls"
AWK="/usr/bin/awk"
GREP="/usr/bin/grep"
HOST="/usr/bin/host"
MOUNT="/sbin/mount"
UMOUNT="/sbin/umount"
SH="/bin/sh"
JAIL="/usr/sbin/jail"
KILLALL="/usr/bin/killall"
start_jails()
{
       for JAILIP in `${LS} -1 ${JAILBASE}`; do
               ${MOUNT} -t devfs devfs ${JAILBASE}/${JAILIP}/dev
               ${MOUNT} -t procfs proc ${JAILBASE}/${JAILIP}/proc
               JAILHOST=`${HOST} ${JAILIP} | ${AWK} '{ print $5; }'`
               ${JAIL} ${JAILBASE}/${JAILIP} ${JAILHOST} ${JAILIP} 
${SH} /etc/rc
       done
}
                                                                               

stop_jails()
{
       echo "Even though you are stopping the jails, the JID may show up"
       echo "when doing \`jls\`.  This is most likely because some 
connections"        echo "are waiting to timeout."
                                                                               

       for JID in `${JLS} | ${GREP} -v JID | ${AWK} '{ print $1; }'`; do
               ${KILLALL} -j ${JID}
               echo "Killing JID: ${JID}"
       done
                                                                               

       for JAILIP in `\ls -1 ${JAILBASE}`; do
               ${UMOUNT} -f ${JAILBASE}/${JAILIP}/proc
               ${UMOUNT} -f ${JAILBASE}/${JAILIP}/dev
       done
}
case "$1" in
       start)
       start_jails
       ;;
       restart)
       stop_jails
       sleep 1
       start_jails
       ;;
       stop)
       stop_jails
       ;;
esac
Thanks again, and sorry for the confusion.
William M. Grim wrote:
Hi!
I've written an rc.d script that can start/stop/restart jails, if they 
follow a certain pattern of setup.  I'm strongly considering the 
placement of this in ports or base (ports seems most appropriate).

Basically, if you have jails in /usr/local/var/jail/<IP>, my script 
can start it up automatically, as long as the IP is reachable by 
`host` (I know, it requires a little more work to remove this 
dependency for 192.168. addresses, etc).

However, I was wondering if anyone would want to test it?  All you 
have to do is take my attached script and place it in 
/usr/local/etc/rc.d/.  If you have your jails located somewhere else, 
then edit the JAILBASE= line in the script.

I would appreciate any constructive criticism about this script so 
that I can make it better.  If you have any improvements you make, 
feel free to send them to me as well.  I'll attempt to make it better 
over time and to write a man page for it.

Many thanks.
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--
William Michael Grim
Student, Southern Illinois University at Edwardsville
Unix Network Administrator, SIUE, Computer Science dept.
Phone: (217) 341-6552
Email: [EMAIL PROTECTED]
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